Lots of updates:

- Added support for new YUYV preview buffer format.
- Made the preview rectangle larger.
- Added support for high resolution screens.
- Updated for Donut but still runs on Cupcake.
- Converted to standard Java coding style for member variables.
- Added many comments and author tags.
- Removed some Petit Four hacks and vestigial code.

*** The app must be built with the Donut SDK from now on.

git-svn-id: https://zxing.googlecode.com/svn/trunk@1049 59b500cc-1b3d-0410-9834-0bbf25fbcc57

android/AndroidManifest.xml

@@ -20,9 +20,16 @@ version to be published. The next versionCode will be 7, regardless of whether t
 versionName is 2.31, 2.4, or 3.0. -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.google.zxing.client.android"
-          android:versionName="2.93"
+          android:versionName="3.0 alpha1"
-          android:versionCode="30">
+          android:versionCode="32">
+  <!-- Allows this app to run on Cupcake devices. -->
   <uses-sdk android:minSdkVersion="3"/>
+  <!-- Donut-specific flags which allow us to run on large and high dpi screens. -->
+  <supports-screens
+    android:largeScreens="true"
+    android:normalScreens="true"
+    android:smallScreens="true"
+    android:anyDensity="true"/>
   <application android:icon="@drawable/launcher_icon"
                android:label="@string/app_name">
     <activity android:name=".CaptureActivity"

android/default.properties

@@ -8,4 +8,4 @@
 # project structure.
 
 # Project target.
-target=Google Inc.:Google APIs:3
+target=Google Inc.:Google APIs:4

android/src/com/google/zxing/client/android/BaseLuminanceSource.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2009 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.zxing.client.android;
+
+import com.google.zxing.LuminanceSource;
+
+import android.graphics.Bitmap;
+
+/**
+ * An extension of LuminanceSource which adds some Android-specific methods.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public abstract class BaseLuminanceSource extends LuminanceSource {
+  public BaseLuminanceSource(int width, int height) {
+    super(width, height);
+  }
+
+  /**
+   * Requests the width of the underlying platform's bitmap.
+   *
+   * @return The width in pixels.
+   */
+  public abstract int getDataWidth();
+
+  /**
+   * Requests the height of the underlying platform's bitmap.
+   *
+   * @return The height in pixels.
+   */
+  public abstract int getDataHeight();
+
+  /**
+   * Creates a greyscale Android Bitmap from the YUV data based on the crop rectangle.
+   *
+   * @return An 8888 bitmap.
+   */
+  public abstract Bitmap renderCroppedGreyscaleBitmap();
+
+  /**
+   * Creates a color Android Bitmap from the YUV data, ignoring the crop rectangle.
+   *
+   * @param halfSize If true, downsample to 50% in each dimension, otherwise not.
+   * @return An 8888 bitmap.
+   */
+  public abstract Bitmap renderFullColorBitmap(boolean halfSize);
+}

android/src/com/google/zxing/client/android/BookmarkPickerActivity.java

@@ -29,9 +29,10 @@ import android.widget.SimpleCursorAdapter;
 /**
  * This class is only needed because I can't successfully send an ACTION_PICK intent to
  * com.android.browser.BrowserBookmarksPage. It can go away if that starts working in the future.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class BookmarkPickerActivity extends ListActivity {
-
   private static final String[] BOOKMARK_PROJECTION = {
       Browser.BookmarkColumns.TITLE,
       Browser.BookmarkColumns.URL
@@ -48,32 +49,31 @@ public final class BookmarkPickerActivity extends ListActivity {
   // Without this selection, we'd get all the history entries too
   private static final String BOOKMARK_SELECTION = "bookmark = 1";
 
-  private Cursor mCursor;
+  private Cursor cursor;
 
   @Override
   protected void onCreate(Bundle icicle) {
     super.onCreate(icicle);
 
-    mCursor = getContentResolver().query(Browser.BOOKMARKS_URI, BOOKMARK_PROJECTION,
+    cursor = getContentResolver().query(Browser.BOOKMARKS_URI, BOOKMARK_PROJECTION,
         BOOKMARK_SELECTION, null, null);
-    startManagingCursor(mCursor);
+    startManagingCursor(cursor);
 
     ListAdapter adapter = new SimpleCursorAdapter(this, R.layout.bookmark_picker_list_item,
-        mCursor, BOOKMARK_PROJECTION, TWO_LINE_VIEW_IDS);
+        cursor, BOOKMARK_PROJECTION, TWO_LINE_VIEW_IDS);
     setListAdapter(adapter);
   }
 
   @Override
   protected void onListItemClick(ListView l, View view, int position, long id) {
-    if (mCursor.moveToPosition(position)) {
+    if (cursor.moveToPosition(position)) {
       Intent intent = new Intent();
-      intent.putExtra(Browser.BookmarkColumns.TITLE, mCursor.getString(TITLE_COLUMN));
+      intent.putExtra(Browser.BookmarkColumns.TITLE, cursor.getString(TITLE_COLUMN));
-      intent.putExtra(Browser.BookmarkColumns.URL, mCursor.getString(URL_COLUMN));
+      intent.putExtra(Browser.BookmarkColumns.URL, cursor.getString(URL_COLUMN));
       setResult(RESULT_OK, intent);
     } else {
       setResult(RESULT_CANCELED);
     }
     finish();
   }
-
 }

android/src/com/google/zxing/client/android/CameraManager.java

@@ -19,6 +19,7 @@ package com.google.zxing.client.android;
 import com.google.zxing.ResultPoint;
 
 import android.content.Context;
+import android.graphics.PixelFormat;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.hardware.Camera;
@@ -35,47 +36,82 @@ import java.io.IOException;
  * This object wraps the Camera service object and expects to be the only one talking to it. The
  * implementation encapsulates the steps needed to take preview-sized images, which are used for
  * both preview and decoding.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 final class CameraManager {
-
   private static final String TAG = "CameraManager";
+  private static final int MIN_FRAME_WIDTH = 240;
+  private static final int MIN_FRAME_HEIGHT = 240;
+  private static final int MAX_FRAME_WIDTH = 480;
+  private static final int MAX_FRAME_HEIGHT = 360;
 
-  private static CameraManager mCameraManager;
+  private static CameraManager cameraManager;
-  private Camera mCamera;
+  private Camera camera;
-  private final Context mContext;
+  private final Context context;
-  private Point mScreenResolution;
+  private Point screenResolution;
-  private Rect mFramingRect;
+  private Point cameraResolution;
-  private Handler mPreviewHandler;
+  private Rect framingRect;
-  private int mPreviewMessage;
+  private Handler previewHandler;
-  private Handler mAutoFocusHandler;
+  private int previewMessage;
-  private int mAutoFocusMessage;
+  private Handler autoFocusHandler;
-  private boolean mInitialized;
+  private int autoFocusMessage;
-  private boolean mPreviewing;
+  private boolean initialized;
+  private boolean previewing;
+  private int previewFormat;
+  private String previewFormatString;
+
+  /**
+   * Preview frames are delivered here, which we pass on to the registered handler. Make sure to
+   * clear the handler so it will only receive one message.
+   */
+  private final Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {
+    public void onPreviewFrame(byte[] data, Camera camera) {
+      camera.setPreviewCallback(null);
+      if (previewHandler != null) {
+        Message message = previewHandler.obtainMessage(previewMessage, cameraResolution.x,
+            cameraResolution.y, data);
+        message.sendToTarget();
+        previewHandler = null;
+      }
+    }
+  };
+
+  private final Camera.AutoFocusCallback autoFocusCallback = new Camera.AutoFocusCallback() {
+    public void onAutoFocus(boolean success, Camera camera) {
+      if (autoFocusHandler != null) {
+        Message message = autoFocusHandler.obtainMessage(autoFocusMessage, success);
+        // Simulate continuous autofocus by sending a focus request every 1.5 seconds.
+        autoFocusHandler.sendMessageDelayed(message, 1500L);
+        autoFocusHandler = null;
+      }
+    }
+  };
 
   public static void init(Context context) {
-    if (mCameraManager == null) {
+    if (cameraManager == null) {
-      mCameraManager = new CameraManager(context);
+      cameraManager = new CameraManager(context);
     }
   }
 
   public static CameraManager get() {
-    return mCameraManager;
+    return cameraManager;
   }
 
   private CameraManager(Context context) {
-    mContext = context;
+    this.context = context;
-    mCamera = null;
+    camera = null;
-    mInitialized = false;
+    initialized = false;
-    mPreviewing = false;
+    previewing = false;
   }
 
   public void openDriver(SurfaceHolder holder) throws IOException {
-    if (mCamera == null) {
+    if (camera == null) {
-      mCamera = Camera.open();
+      camera = Camera.open();
-      mCamera.setPreviewDisplay(holder);
+      camera.setPreviewDisplay(holder);
 
-      if (!mInitialized) {
+      if (!initialized) {
-        mInitialized = true;
+        initialized = true;
         getScreenResolution();
       }
 
@@ -84,26 +120,26 @@ final class CameraManager {
   }
 
   public void closeDriver() {
-    if (mCamera != null) {
+    if (camera != null) {
-      mCamera.release();
+      camera.release();
-      mCamera = null;
+      camera = null;
     }
   }
 
   public void startPreview() {
-    if (mCamera != null && !mPreviewing) {
+    if (camera != null && !previewing) {
-      mCamera.startPreview();
+      camera.startPreview();
-      mPreviewing = true;
+      previewing = true;
     }
   }
 
   public void stopPreview() {
-    if (mCamera != null && mPreviewing) {
+    if (camera != null && previewing) {
-      mCamera.setPreviewCallback(null);
+      camera.setPreviewCallback(null);
-      mCamera.stopPreview();
+      camera.stopPreview();
-      mPreviewHandler = null;
+      previewHandler = null;
-      mAutoFocusHandler = null;
+      autoFocusHandler = null;
-      mPreviewing = false;
+      previewing = false;
     }
   }
 
@@ -116,39 +152,48 @@ final class CameraManager {
    * @param message The what field of the message to be sent.
    */
   public void requestPreviewFrame(Handler handler, int message) {
-    if (mCamera != null && mPreviewing) {
+    if (camera != null && previewing) {
-      mPreviewHandler = handler;
+      previewHandler = handler;
-      mPreviewMessage = message;
+      previewMessage = message;
-      mCamera.setPreviewCallback(previewCallback);
+      camera.setPreviewCallback(previewCallback);
     }
   }
 
   public void requestAutoFocus(Handler handler, int message) {
-    if (mCamera != null && mPreviewing) {
+    if (camera != null && previewing) {
-      mAutoFocusHandler = handler;
+      autoFocusHandler = handler;
-      mAutoFocusMessage = message;
+      autoFocusMessage = message;
-      mCamera.autoFocus(autoFocusCallback);
+      camera.autoFocus(autoFocusCallback);
     }
   }
 
   /**
    * Calculates the framing rect which the UI should draw to show the user where to place the
-   * barcode. The actual captured image should be a bit larger than indicated because they might
+   * barcode. This target helps with alignment as well as forces the user to hold the device
-   * frame the shot too tightly. This target helps with alignment as well as forces the user to hold
+   * far enough away to ensure the image will be in focus.
-   * the device far enough away to ensure the image will be in focus.
    *
    * @return The rectangle to draw on screen in window coordinates.
    */
   public Rect getFramingRect() {
-    if (mFramingRect == null) {
+    if (framingRect == null) {
-      int size = (mScreenResolution.x < mScreenResolution.y ? mScreenResolution.x :
+      int width = cameraResolution.x * 3 / 4;
-          mScreenResolution.y) * 3 / 4;
+      if (width < MIN_FRAME_WIDTH) {
-      int leftOffset = (mScreenResolution.x - size) / 2;
+        width = MIN_FRAME_WIDTH;
-      int topOffset = (mScreenResolution.y - size) / 2;
+      } else if (width > MAX_FRAME_WIDTH) {
-      mFramingRect = new Rect(leftOffset, topOffset, leftOffset + size, topOffset + size);
+        width = MAX_FRAME_WIDTH;
-      Log.v(TAG, "Calculated framing rect: " + mFramingRect);
+      }
+      int height = cameraResolution.y * 3 / 4;
+      if (height < MIN_FRAME_HEIGHT) {
+        height = MIN_FRAME_HEIGHT;
+      } else if (height > MAX_FRAME_HEIGHT) {
+        height = MAX_FRAME_HEIGHT;
+      }
+      int leftOffset = (cameraResolution.x - width) / 2;
+      int topOffset = (cameraResolution.y - height) / 2;
+      framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);
+      Log.v(TAG, "Calculated framing rect: " + framingRect);
     }
-    return mFramingRect;
+    return framingRect;
   }
 
   /**
@@ -171,31 +216,31 @@ final class CameraManager {
   }
 
   /**
-   * Preview frames are delivered here, which we pass on to the registered handler. Make sure to
+   * A factory method to build the appropriate LuminanceSource object based on the format
-   * clear the handler so it will only receive one message.
+   * of the preview buffers, as described by Camera.Parameters.
+   *
+   * @param data A preview frame.
+   * @param width The width of the image.
+   * @param height The height of the image.
+   * @return A BaseLuminanceSource subclass.
    */
-  private final Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {
+  public BaseLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
-    public void onPreviewFrame(byte[] data, Camera camera) {
+    Rect rect = getFramingRect();
-      camera.setPreviewCallback(null);
+    switch (previewFormat) {
-      if (mPreviewHandler != null) {
+      case PixelFormat.YCbCr_420_SP:
-        Message message = mPreviewHandler.obtainMessage(mPreviewMessage, mScreenResolution.x,
+      case PixelFormat.YCbCr_422_SP:
-            mScreenResolution.y, data);
+        return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top,
-        message.sendToTarget();
+            rect.width(), rect.height());
-        mPreviewHandler = null;
+      default:
-      }
+        // There's no PixelFormat constant for this buffer format yet.
+        if (previewFormatString.equals("yuv422i-yuyv")) {
+          return new InterleavedYUV422LuminanceSource(data, width, height, rect.left, rect.top,
+              rect.width(), rect.height());
+        }
+        break;
     }
-  };
+    return null;
-
+  }
-  private final Camera.AutoFocusCallback autoFocusCallback = new Camera.AutoFocusCallback() {
-    public void onAutoFocus(boolean success, Camera camera) {
-      if (mAutoFocusHandler != null) {
-        Message message = mAutoFocusHandler.obtainMessage(mAutoFocusMessage, success);
-        // Simulate continuous autofocus by sending a focus request every 1.5 seconds.
-        mAutoFocusHandler.sendMessageDelayed(message, 1500L);
-        mAutoFocusHandler = null;
-      }
-    }
-  };
 
   /**
    * Sets the camera up to take preview images which are used for both preview and decoding. We're
@@ -203,13 +248,21 @@ final class CameraManager {
    * specify it explicitly with setPreviewFormat().
    */
   private void setCameraParameters() {
-    Camera.Parameters parameters = mCamera.getParameters();
+    Camera.Parameters parameters = camera.getParameters();
     Camera.Size size = parameters.getPreviewSize();
     Log.v(TAG, "Default preview size: " + size.width + ", " + size.height);
-    Log.v(TAG, "Default preview format: " + parameters.getPreviewFormat());
+    previewFormat = parameters.getPreviewFormat();
-    Log.v(TAG, "Setting preview size: " + mScreenResolution.x + ", " + mScreenResolution.y);
+    previewFormatString = parameters.get("preview-format");
+    Log.v(TAG, "Default preview format: " + previewFormat);
 
-    parameters.setPreviewSize(mScreenResolution.x, mScreenResolution.y);
+    // Ensure that the camera resolution is a multiple of 8, as the screen may not be.
+    // TODO: A better solution would be to request the supported preview resolutions
+    // and pick the best match, but this parameter is not standardized in Cupcake.
+    cameraResolution = new Point();
+    cameraResolution.x = (screenResolution.x >> 3) << 3;
+    cameraResolution.y = (screenResolution.y >> 3) << 3;
+    Log.v(TAG, "Setting preview size: " + cameraResolution.x + ", " + cameraResolution.y);
+    parameters.setPreviewSize(cameraResolution.x, cameraResolution.y);
 
     // FIXME: This is a hack to turn the flash off on the Samsung Galaxy.
     parameters.set("flash-value", 2);
@@ -217,16 +270,16 @@ final class CameraManager {
     // This is the standard setting to turn the flash off that all devices should honor.
     parameters.set("flash-mode", "off");
 
-    mCamera.setParameters(parameters);
+    camera.setParameters(parameters);
   }
 
   private Point getScreenResolution() {
-    if (mScreenResolution == null) {
+    if (screenResolution == null) {
-      WindowManager manager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
+      WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
       Display display = manager.getDefaultDisplay();
-      mScreenResolution = new Point(display.getWidth(), display.getHeight());
+      screenResolution = new Point(display.getWidth(), display.getHeight());
     }
-    return mScreenResolution;
+    return screenResolution;
   }
 
 }

android/src/com/google/zxing/client/android/CaptureActivity.java

@@ -16,6 +16,12 @@
 
 package com.google.zxing.client.android;
 
+import com.google.zxing.Result;
+import com.google.zxing.ResultPoint;
+import com.google.zxing.client.android.result.ResultButtonListener;
+import com.google.zxing.client.android.result.ResultHandler;
+import com.google.zxing.client.android.result.ResultHandlerFactory;
+
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
@@ -54,20 +60,16 @@ import android.view.WindowManager;
 import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
-import com.google.zxing.Result;
-import com.google.zxing.ResultPoint;
-import com.google.zxing.client.android.result.ResultButtonListener;
-import com.google.zxing.client.android.result.ResultHandler;
-import com.google.zxing.client.android.result.ResultHandlerFactory;
 
 import java.io.IOException;
 
 /**
  * The barcode reader activity itself. This is loosely based on the CameraPreview
  * example included in the Android SDK.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
-
   private static final String TAG = "CaptureActivity";
 
   private static final int SHARE_ID = Menu.FIRST;
@@ -92,23 +94,31 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     NONE
   }
 
-  public CaptureActivityHandler mHandler;
+  public CaptureActivityHandler handler;
 
-  private ViewfinderView mViewfinderView;
+  private ViewfinderView viewfinderView;
-  private View mStatusView;
+  private View statusView;
-  private View mResultView;
+  private View resultView;
-  private MediaPlayer mMediaPlayer;
+  private MediaPlayer mediaPlayer;
-  private Result mLastResult;
+  private Result lastResult;
-  private boolean mHasSurface;
+  private boolean hasSurface;
-  private boolean mPlayBeep;
+  private boolean playBeep;
-  private boolean mVibrate;
+  private boolean vibrate;
-  private boolean mCopyToClipboard;
+  private boolean copyToClipboard;
-  private Source mSource;
+  private Source source;
-  private String mSourceUrl;
+  private String sourceUrl;
-  private String mDecodeMode;
+  private String decodeMode;
-  private String mVersionName;
+  private String versionName;
+  
+  private final OnCompletionListener beepListener = new BeepListener();
 
-  private final OnCompletionListener mBeepListener = new BeepListener();
+  private final DialogInterface.OnClickListener aboutListener =
+      new DialogInterface.OnClickListener() {
+    public void onClick(DialogInterface dialogInterface, int i) {
+      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
+      startActivity(intent);
+    }
+  };
 
   @Override
   public void onCreate(Bundle icicle) {
@@ -120,12 +130,12 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     setContentView(R.layout.capture);
 
     CameraManager.init(getApplication());
-    mViewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
+    viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
-    mResultView = findViewById(R.id.result_view);
+    resultView = findViewById(R.id.result_view);
-    mStatusView = findViewById(R.id.status_view);
+    statusView = findViewById(R.id.status_view);
-    mHandler = null;
+    handler = null;
-    mLastResult = null;
+    lastResult = null;
-    mHasSurface = false;
+    hasSurface = false;
 
     showHelpOnFirstLaunch();
   }
@@ -136,7 +146,7 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
 
     SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
     SurfaceHolder surfaceHolder = surfaceView.getHolder();
-    if (mHasSurface) {
+    if (hasSurface) {
       // The activity was paused but not stopped, so the surface still exists. Therefore
       // surfaceCreated() won't be called, so init the camera here.
       initCamera(surfaceHolder);
@@ -150,52 +160,52 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     String action = intent == null ? null : intent.getAction();
     String dataString = intent == null ? null : intent.getDataString();
     if (intent != null && action != null) {
-      if (action.equals(Intents.Scan.ACTION) || action.equals(Intents.Scan.DEPRECATED_ACTION)) {
+      if (action.equals(Intents.Scan.ACTION)) {
         // Scan the formats the intent requested, and return the result to the calling activity.
-        mSource = Source.NATIVE_APP_INTENT;
+        source = Source.NATIVE_APP_INTENT;
-        mDecodeMode = intent.getStringExtra(Intents.Scan.MODE);
+        decodeMode = intent.getStringExtra(Intents.Scan.MODE);
         resetStatusView();
       } else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX) &&
           dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {
         // Scan only products and send the result to mobile Product Search.
-        mSource = Source.PRODUCT_SEARCH_LINK;
+        source = Source.PRODUCT_SEARCH_LINK;
-        mSourceUrl = dataString;
+        sourceUrl = dataString;
-        mDecodeMode = Intents.Scan.PRODUCT_MODE;
+        decodeMode = Intents.Scan.PRODUCT_MODE;
         resetStatusView();
       } else if (dataString != null && dataString.equals(ZXING_URL)) {
         // Scan all formats and handle the results ourselves.
         // TODO: In the future we could allow the hyperlink to include a URL to send the results to.
-        mSource = Source.ZXING_LINK;
+        source = Source.ZXING_LINK;
-        mSourceUrl = dataString;
+        sourceUrl = dataString;
-        mDecodeMode = null;
+        decodeMode = null;
         resetStatusView();
       } else {
         // Scan all formats and handle the results ourselves (launched from Home).
-        mSource = Source.NONE;
+        source = Source.NONE;
-        mDecodeMode = null;
+        decodeMode = null;
         resetStatusView();
       }
     } else {
-      mSource = Source.NONE;
+      source = Source.NONE;
-      mDecodeMode = null;
+      decodeMode = null;
-      if (mLastResult == null) {
+      if (lastResult == null) {
         resetStatusView();
       }
     }
 
     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
-    mPlayBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
+    playBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
-    mVibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
+    vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false);
-    mCopyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
+    copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true);
     initBeepSound();
   }
 
   @Override
   protected void onPause() {
     super.onPause();
-    if (mHandler != null) {
+    if (handler != null) {
-      mHandler.quitSynchronously();
+      handler.quitSynchronously();
-      mHandler = null;
+      handler = null;
     }
     CameraManager.get().closeDriver();
   }
@@ -203,13 +213,13 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
   @Override
   public boolean onKeyDown(int keyCode, KeyEvent event) {
     if (keyCode == KeyEvent.KEYCODE_BACK) {
-      if (mSource == Source.NATIVE_APP_INTENT) {
+      if (source == Source.NATIVE_APP_INTENT) {
         setResult(RESULT_CANCELED);
         finish();
         return true;
-      } else if ((mSource == Source.NONE || mSource == Source.ZXING_LINK) && mLastResult != null) {
+      } else if ((source == Source.NONE || source == Source.ZXING_LINK) && lastResult != null) {
         resetStatusView();
-        mHandler.sendEmptyMessage(R.id.restart_preview);
+        handler.sendEmptyMessage(R.id.restart_preview);
         return true;
       }
     } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
@@ -236,7 +246,7 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
   @Override
   public boolean onPrepareOptionsMenu(Menu menu) {
     super.onPrepareOptionsMenu(menu);
-    menu.findItem(SHARE_ID).setVisible(mLastResult == null);
+    menu.findItem(SHARE_ID).setVisible(lastResult == null);
     return true;
   }
 
@@ -263,10 +273,10 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       }
       case ABOUT_ID:
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
-        builder.setTitle(getString(R.string.title_about) + mVersionName);
+        builder.setTitle(getString(R.string.title_about) + versionName);
         builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
         builder.setIcon(R.drawable.zxing_icon);
-        builder.setPositiveButton(R.string.button_open_browser, mAboutListener);
+        builder.setPositiveButton(R.string.button_open_browser, aboutListener);
         builder.setNegativeButton(R.string.button_cancel, null);
         builder.show();
         break;
@@ -280,22 +290,15 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     super.onConfigurationChanged(config);
   }
 
-  private final DialogInterface.OnClickListener mAboutListener = new DialogInterface.OnClickListener() {
-    public void onClick(DialogInterface dialogInterface, int i) {
-      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
-      startActivity(intent);
-    }
-  };
-
   public void surfaceCreated(SurfaceHolder holder) {
-    if (!mHasSurface) {
+    if (!hasSurface) {
-      mHasSurface = true;
+      hasSurface = true;
       initCamera(holder);
     }
   }
 
   public void surfaceDestroyed(SurfaceHolder holder) {
-    mHasSurface = false;
+    hasSurface = false;
   }
 
   public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
@@ -309,11 +312,11 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
    * @param barcode   A greyscale bitmap of the camera data which was decoded.
    */
   public void handleDecode(Result rawResult, Bitmap barcode) {
-    mLastResult = rawResult;
+    lastResult = rawResult;
     playBeepSoundAndVibrate();
     drawResultPoints(barcode, rawResult);
 
-    switch (mSource) {
+    switch (source) {
       case NATIVE_APP_INTENT:
       case PRODUCT_SEARCH_LINK:
         handleDecodeExternally(rawResult, barcode);
@@ -358,9 +361,9 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
 
   // Put up our own UI for how to handle the decoded contents.
   private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
-    mStatusView.setVisibility(View.GONE);
+    statusView.setVisibility(View.GONE);
-    mViewfinderView.setVisibility(View.GONE);
+    viewfinderView.setVisibility(View.GONE);
-    mResultView.setVisibility(View.VISIBLE);
+    resultView.setVisibility(View.VISIBLE);
 
     ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
     barcodeImageView.setMaxWidth(MAX_RESULT_IMAGE_SIZE);
@@ -398,7 +401,7 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       }
     }
 
-    if (mCopyToClipboard) {
+    if (copyToClipboard) {
       ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
       clipboard.setText(displayContents);
     }
@@ -406,7 +409,7 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
 
   // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
   private void handleDecodeExternally(Result rawResult, Bitmap barcode) {
-    mViewfinderView.drawResultBitmap(barcode);
+    viewfinderView.drawResultBitmap(barcode);
 
     // Since this message will only be shown for a second, just tell the user what kind of
     // barcode was found (e.g. contact info) rather than the full contents, which they won't
@@ -417,30 +420,30 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     textView.setTextSize(18.0f);
     textView.setText(getString(resultHandler.getDisplayTitle()));
 
-    mStatusView.setBackgroundColor(getResources().getColor(R.color.transparent));
+    statusView.setBackgroundColor(getResources().getColor(R.color.transparent));
 
-    if (mCopyToClipboard) {
+    if (copyToClipboard) {
       ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
       clipboard.setText(resultHandler.getDisplayContents());
     }
 
-    if (mSource == Source.NATIVE_APP_INTENT) {
+    if (source == Source.NATIVE_APP_INTENT) {
       // Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION when
       // the deprecated intent is retired.
       Intent intent = new Intent(getIntent().getAction());
       intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
       intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
-      Message message = Message.obtain(mHandler, R.id.return_scan_result);
+      Message message = Message.obtain(handler, R.id.return_scan_result);
       message.obj = intent;
-      mHandler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
+      handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
-    } else if (mSource == Source.PRODUCT_SEARCH_LINK) {
+    } else if (source == Source.PRODUCT_SEARCH_LINK) {
       // Reformulate the URL which triggered us into a query, so that the request goes to the same
       // TLD as the scan URL.
-      Message message = Message.obtain(mHandler, R.id.launch_product_query);
+      Message message = Message.obtain(handler, R.id.launch_product_query);
-      int end = mSourceUrl.lastIndexOf("/scan");
+      int end = sourceUrl.lastIndexOf("/scan");
-      message.obj = mSourceUrl.substring(0, end) + "?q=" +
+      message.obj = sourceUrl.substring(0, end) + "?q=" +
           resultHandler.getDisplayContents().toString() + "&source=zxing";
-      mHandler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
+      handler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
     }
   }
 
@@ -455,7 +458,7 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       int currentVersion = info.versionCode;
       // Since we're paying to talk to the PackageManager anyway, it makes sense to cache the app
       // version name here for display in the about box later.
-      this.mVersionName = info.versionName;
+      this.versionName = info.versionName;
       SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
       int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
       if (currentVersion > lastVersion) {
@@ -474,29 +477,29 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
    * latency possible.
    */
   private void initBeepSound() {
-    if (mPlayBeep && mMediaPlayer == null) {
+    if (playBeep && mediaPlayer == null) {
-      mMediaPlayer = new MediaPlayer();
+      mediaPlayer = new MediaPlayer();
-      mMediaPlayer.setAudioStreamType(AudioManager.STREAM_SYSTEM);
+      mediaPlayer.setAudioStreamType(AudioManager.STREAM_SYSTEM);
-      mMediaPlayer.setOnCompletionListener(mBeepListener);
+      mediaPlayer.setOnCompletionListener(beepListener);
 
       AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
       try {
-        mMediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
+        mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
             file.getLength());
         file.close();
-        mMediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
+        mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
-        mMediaPlayer.prepare();
+        mediaPlayer.prepare();
       } catch (IOException e) {
-        mMediaPlayer = null;
+        mediaPlayer = null;
       }
     }
   }
 
   private void playBeepSoundAndVibrate() {
-    if (mPlayBeep && mMediaPlayer != null) {
+    if (playBeep && mediaPlayer != null) {
-      mMediaPlayer.start();
+      mediaPlayer.start();
     }
-    if (mVibrate) {
+    if (vibrate) {
       Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
       vibrator.vibrate(VIBRATE_DURATION);
     }
@@ -509,27 +512,27 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       Log.w(TAG, ioe);
       return;
     }
-    if (mHandler == null) {
+    if (handler == null) {
-      boolean beginScanning = mLastResult == null;
+      boolean beginScanning = lastResult == null;
-      mHandler = new CaptureActivityHandler(this, mDecodeMode, beginScanning);
+      handler = new CaptureActivityHandler(this, decodeMode, beginScanning);
     }
   }
 
   private void resetStatusView() {
-    mResultView.setVisibility(View.GONE);
+    resultView.setVisibility(View.GONE);
-    mStatusView.setVisibility(View.VISIBLE);
+    statusView.setVisibility(View.VISIBLE);
-    mStatusView.setBackgroundColor(getResources().getColor(R.color.status_view));
+    statusView.setBackgroundColor(getResources().getColor(R.color.status_view));
-    mViewfinderView.setVisibility(View.VISIBLE);
+    viewfinderView.setVisibility(View.VISIBLE);
 
     TextView textView = (TextView) findViewById(R.id.status_text_view);
     textView.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
     textView.setTextSize(14.0f);
     textView.setText(R.string.msg_default_status);
-    mLastResult = null;
+    lastResult = null;
   }
 
   public void drawViewfinder() {
-    mViewfinderView.drawViewfinder();
+    viewfinderView.drawViewfinder();
   }
 
   /**
@@ -540,5 +543,4 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       mediaPlayer.seekTo(0);
     }
   }
-
 }

android/src/com/google/zxing/client/android/CaptureActivityHandler.java

@@ -16,6 +16,8 @@
 
 package com.google.zxing.client.android;
 
+import com.google.zxing.Result;
+
 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
@@ -23,16 +25,16 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
-import com.google.zxing.Result;
 
 /**
  * This class handles all the messaging which comprises the state machine for capture.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class CaptureActivityHandler extends Handler {
-
+  private final CaptureActivity activity;
-  private final CaptureActivity mActivity;
+  private final DecodeThread decodeThread;
-  private final DecodeThread mDecodeThread;
+  private State state;
-  private State mState;
 
   private enum State {
     PREVIEW,
@@ -42,10 +44,10 @@ public final class CaptureActivityHandler extends Handler {
 
   CaptureActivityHandler(CaptureActivity activity, String decodeMode,
                                  boolean beginScanning) {
-    mActivity = activity;
+    this.activity = activity;
-    mDecodeThread = new DecodeThread(activity, decodeMode);
+    decodeThread = new DecodeThread(activity, decodeMode);
-    mDecodeThread.start();
+    decodeThread.start();
-    mState = State.SUCCESS;
+    state = State.SUCCESS;
 
     // Start ourselves capturing previews and decoding.
     CameraManager.get().startPreview();
@@ -60,7 +62,7 @@ public final class CaptureActivityHandler extends Handler {
       case R.id.auto_focus:
         // When one auto focus pass finishes, start another. This is the closest thing to
         // continuous AF. It does seem to hunt a bit, but I'm not sure what else to do.
-        if (mState == State.PREVIEW) {
+        if (state == State.PREVIEW) {
           CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
         }
         break;
@@ -68,34 +70,34 @@ public final class CaptureActivityHandler extends Handler {
         restartPreviewAndDecode();
         break;
       case R.id.decode_succeeded:
-        mState = State.SUCCESS;
+        state = State.SUCCESS;
         Bundle bundle = message.getData();
         Bitmap barcode = bundle.getParcelable(DecodeThread.BARCODE_BITMAP);
-        mActivity.handleDecode((Result) message.obj, barcode);
+        activity.handleDecode((Result) message.obj, barcode);
         break;
       case R.id.decode_failed:
         // We're decoding as fast as possible, so when one decode fails, start another.
-        mState = State.PREVIEW;
+        state = State.PREVIEW;
-        CameraManager.get().requestPreviewFrame(mDecodeThread.mHandler, R.id.decode);
+        CameraManager.get().requestPreviewFrame(decodeThread.handler, R.id.decode);
         break;
       case R.id.return_scan_result:
-        mActivity.setResult(Activity.RESULT_OK, (Intent) message.obj);
+        activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
-        mActivity.finish();
+        activity.finish();
         break;
       case R.id.launch_product_query:
         String url = (String) message.obj;
-        mActivity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
+        activity.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
         break;
     }
   }
 
   public void quitSynchronously() {
-    mState = State.DONE;
+    state = State.DONE;
     CameraManager.get().stopPreview();
-    Message quit = Message.obtain(mDecodeThread.mHandler, R.id.quit);
+    Message quit = Message.obtain(decodeThread.handler, R.id.quit);
     quit.sendToTarget();
     try {
-      mDecodeThread.join();
+      decodeThread.join();
     } catch (InterruptedException e) {
     }
 
@@ -105,12 +107,11 @@ public final class CaptureActivityHandler extends Handler {
   }
 
   private void restartPreviewAndDecode() {
-    if (mState == State.SUCCESS) {
+    if (state == State.SUCCESS) {
-      mState = State.PREVIEW;
+      state = State.PREVIEW;
-      CameraManager.get().requestPreviewFrame(mDecodeThread.mHandler, R.id.decode);
+      CameraManager.get().requestPreviewFrame(decodeThread.handler, R.id.decode);
       CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
-      mActivity.drawViewfinder();
+      activity.drawViewfinder();
     }
   }
-
 }

android/src/com/google/zxing/client/android/Contents.java

@@ -18,8 +18,13 @@ package com.google.zxing.client.android;
 
 import android.provider.Contacts;
 
+/**
+ * The set of constants to use when sending Barcode Scanner an Intent which requests a barcode
+ * to be encoded.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class Contents {
-
   private Contents() {
   }
 
@@ -89,24 +94,19 @@ public final class Contents {
     }
   }
 
-  // These are new constants in Contacts.Intents.Insert for Android 1.1.
-  // TODO: Remove these constants once we can build against the 1.1 SDK.
-  private static final String SECONDARY_PHONE = "secondary_phone";
-  private static final String TERTIARY_PHONE = "tertiary_phone";
-  private static final String SECONDARY_EMAIL = "secondary_email";
-  private static final String TERTIARY_EMAIL = "tertiary_email";
-
-
   /**
    * When using Type.CONTACT, these arrays provide the keys for adding or retrieving multiple
    * phone numbers and addresses.
    */
   public static final String[] PHONE_KEYS = {
-      Contacts.Intents.Insert.PHONE, SECONDARY_PHONE, TERTIARY_PHONE
+      Contacts.Intents.Insert.PHONE,
+      Contacts.Intents.Insert.SECONDARY_PHONE,
+      Contacts.Intents.Insert.TERTIARY_PHONE
   };
 
   public static final String[] EMAIL_KEYS = {
-      Contacts.Intents.Insert.EMAIL, SECONDARY_EMAIL, TERTIARY_EMAIL
+      Contacts.Intents.Insert.EMAIL,
+      Contacts.Intents.Insert.SECONDARY_EMAIL,
+      Contacts.Intents.Insert.TERTIARY_EMAIL
   };
-
 }

android/src/com/google/zxing/client/android/DecodeThread.java

@@ -25,7 +25,6 @@ import com.google.zxing.Result;
 import com.google.zxing.common.GlobalHistogramBinarizer;
 
 import android.content.SharedPreferences;
-import android.graphics.Rect;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
@@ -38,19 +37,20 @@ import java.util.Vector;
 
 /**
  * This thread does all the heavy lifting of decoding the images.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 final class DecodeThread extends Thread {
-
   public static final String BARCODE_BITMAP = "barcode_bitmap";
   private static final String TAG = "DecodeThread";
 
-  public Handler mHandler;
+  public Handler handler;
-  private final CaptureActivity mActivity;
+  private final CaptureActivity activity;
-  private final MultiFormatReader mMultiFormatReader;
+  private final MultiFormatReader multiFormatReader;
 
   DecodeThread(CaptureActivity activity, String mode) {
-    mActivity = activity;
+    this.activity = activity;
-    mMultiFormatReader = new MultiFormatReader();
+    multiFormatReader = new MultiFormatReader();
 
     // The prefs can't change while the thread is running, so pick them up once here.
     if (mode == null || mode.length() == 0) {
@@ -80,7 +80,7 @@ final class DecodeThread extends Thread {
   @Override
   public void run() {
     Looper.prepare();
-    mHandler = new Handler() {
+    handler = new Handler() {
       @Override
       public void handleMessage(Message message) {
         switch (message.what) {
@@ -104,7 +104,7 @@ final class DecodeThread extends Thread {
     vector.addElement(BarcodeFormat.EAN_13);
     vector.addElement(BarcodeFormat.EAN_8);
     hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    mMultiFormatReader.setHints(hints);
+    multiFormatReader.setHints(hints);
   }
 
   /**
@@ -121,7 +121,7 @@ final class DecodeThread extends Thread {
     vector.addElement(BarcodeFormat.CODE_128);
     vector.addElement(BarcodeFormat.ITF);
     hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    mMultiFormatReader.setHints(hints);
+    multiFormatReader.setHints(hints);
   }
 
   private void setDecodeQRMode() {
@@ -129,7 +129,7 @@ final class DecodeThread extends Thread {
     Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(1);
     vector.addElement(BarcodeFormat.QR_CODE);
     hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    mMultiFormatReader.setHints(hints);
+    multiFormatReader.setHints(hints);
   }
 
   /**
@@ -148,7 +148,7 @@ final class DecodeThread extends Thread {
     vector.addElement(BarcodeFormat.ITF);
     vector.addElement(BarcodeFormat.QR_CODE);
     hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    mMultiFormatReader.setHints(hints);
+    multiFormatReader.setHints(hints);
   }
 
   /**
@@ -163,12 +163,10 @@ final class DecodeThread extends Thread {
     long start = System.currentTimeMillis();
     boolean success;
     Result rawResult = null;
-    Rect rect = CameraManager.get().getFramingRect();
+    BaseLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
-    YUVLuminanceSource source = new YUVLuminanceSource(data, width, height, rect.left, rect.top,
-        rect.width(), rect.height());
     BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source));
     try {
-      rawResult = mMultiFormatReader.decodeWithState(bitmap);
+      rawResult = multiFormatReader.decodeWithState(bitmap);
       success = true;
     } catch (ReaderException e) {
       success = false;
@@ -177,15 +175,14 @@ final class DecodeThread extends Thread {
 
     if (success) {
       Log.v(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
-      Message message = Message.obtain(mActivity.mHandler, R.id.decode_succeeded, rawResult);
+      Message message = Message.obtain(activity.handler, R.id.decode_succeeded, rawResult);
       Bundle bundle = new Bundle();
-      bundle.putParcelable(BARCODE_BITMAP, source.renderToBitmap());
+      bundle.putParcelable(BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
       message.setData(bundle);
       message.sendToTarget();
     } else {
-      Message message = Message.obtain(mActivity.mHandler, R.id.decode_failed);
+      Message message = Message.obtain(activity.handler, R.id.decode_failed);
       message.sendToTarget();
     }
   }
-
 }

android/src/com/google/zxing/client/android/EncodeActivity.java

@@ -35,20 +35,82 @@ import android.widget.TextView;
 /**
  * This class encodes data from an Intent into a QR code, and then displays it full screen so that
  * another person can scan it with their device.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class EncodeActivity extends Activity {
+  private QRCodeEncoder qrCodeEncoder;
+  private ProgressDialog progressDialog;
+  private boolean firstLayout;
 
-  private QRCodeEncoder mQRCodeEncoder;
+  /**
-  private ProgressDialog mProgressDialog;
+   * This needs to be delayed until after the first layout so that the view dimensions will be
-  private boolean mFirstLayout;
+   * available.
+   */
+  public final OnGlobalLayoutListener layoutListener = new OnGlobalLayoutListener() {
+    public void onGlobalLayout() {
+      if (firstLayout) {
+        View layout = findViewById(R.id.encode_view);
+        int width = layout.getWidth();
+        int height = layout.getHeight();
+        int smallerDimension = width < height ? width : height;
+        smallerDimension = smallerDimension * 7 / 8;
+
+        Intent intent = getIntent();
+        try {
+          qrCodeEncoder = new QRCodeEncoder(EncodeActivity.this, intent);
+          setTitle(getString(R.string.app_name) + " - " + qrCodeEncoder.getTitle());
+          qrCodeEncoder.requestBarcode(handler, smallerDimension);
+          progressDialog = ProgressDialog.show(EncodeActivity.this, null,
+              getString(R.string.msg_encode_in_progress), true, true, cancelListener);
+        } catch (IllegalArgumentException e) {
+          showErrorMessage(R.string.msg_encode_contents_failed);
+        }
+        firstLayout = false;
+      }
+    }
+  };
+
+  public final Handler handler = new Handler() {
+    @Override
+    public void handleMessage(Message message) {
+      switch (message.what) {
+        case R.id.encode_succeeded:
+          progressDialog.dismiss();
+          progressDialog = null;
+          Bitmap image = (Bitmap) message.obj;
+          ImageView view = (ImageView) findViewById(R.id.image_view);
+          view.setImageBitmap(image);
+          TextView contents = (TextView) findViewById(R.id.contents_text_view);
+          contents.setText(qrCodeEncoder.getDisplayContents());
+          qrCodeEncoder = null;
+          break;
+        case R.id.encode_failed:
+          showErrorMessage(R.string.msg_encode_barcode_failed);
+          qrCodeEncoder = null;
+          break;
+      }
+    }
+  };
+
+  private final OnClickListener clickListener = new OnClickListener() {
+    public void onClick(DialogInterface dialog, int which) {
+      finish();
+    }
+  };
+
+  private final OnCancelListener cancelListener = new OnCancelListener() {
+    public void onCancel(DialogInterface dialog) {
+      finish();
+    }
+  };
 
   @Override
   public void onCreate(Bundle icicle) {
     super.onCreate(icicle);
 
     Intent intent = getIntent();
-    if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION) ||
+    if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION))) {
-        intent.getAction().equals(Intents.Encode.DEPRECATED_ACTION))) {
       setContentView(R.layout.encode);
     } else {
       finish();
@@ -60,81 +122,18 @@ public final class EncodeActivity extends Activity {
     super.onResume();
 
     View layout = findViewById(R.id.encode_view);
-    layout.getViewTreeObserver().addOnGlobalLayoutListener(mLayoutListener);
+    layout.getViewTreeObserver().addOnGlobalLayoutListener(layoutListener);
-    mFirstLayout = true;
+    firstLayout = true;
   }
 
-  /**
-   * This needs to be delayed until after the first layout so that the view dimensions will be
-   * available.
-   */
-  public final OnGlobalLayoutListener mLayoutListener = new OnGlobalLayoutListener() {
-    public void onGlobalLayout() {
-      if (mFirstLayout) {
-        View layout = findViewById(R.id.encode_view);
-        int width = layout.getWidth();
-        int height = layout.getHeight();
-        int smallerDimension = width < height ? width : height;
-        smallerDimension = smallerDimension * 7 / 8;
-
-        Intent intent = getIntent();
-        try {
-          mQRCodeEncoder = new QRCodeEncoder(EncodeActivity.this, intent);
-          setTitle(getString(R.string.app_name) + " - " + mQRCodeEncoder.getTitle());
-          mQRCodeEncoder.requestBarcode(mHandler, smallerDimension);
-          mProgressDialog = ProgressDialog.show(EncodeActivity.this, null,
-              getString(R.string.msg_encode_in_progress), true, true, mCancelListener);
-        } catch (IllegalArgumentException e) {
-          showErrorMessage(R.string.msg_encode_contents_failed);
-        }
-        mFirstLayout = false;
-      }
-    }
-  };
-
-  public final Handler mHandler = new Handler() {
-    @Override
-    public void handleMessage(Message message) {
-      switch (message.what) {
-        case R.id.encode_succeeded:
-          mProgressDialog.dismiss();
-          mProgressDialog = null;
-          Bitmap image = (Bitmap) message.obj;
-          ImageView view = (ImageView) findViewById(R.id.image_view);
-          view.setImageBitmap(image);
-          TextView contents = (TextView) findViewById(R.id.contents_text_view);
-          contents.setText(mQRCodeEncoder.getDisplayContents());
-          mQRCodeEncoder = null;
-          break;
-        case R.id.encode_failed:
-          showErrorMessage(R.string.msg_encode_barcode_failed);
-          mQRCodeEncoder = null;
-          break;
-      }
-    }
-  };
-
   private void showErrorMessage(int message) {
-    if (mProgressDialog != null) {
+    if (progressDialog != null) {
-      mProgressDialog.dismiss();
+      progressDialog.dismiss();
-      mProgressDialog = null;
+      progressDialog = null;
     }
     AlertDialog.Builder builder = new AlertDialog.Builder(this);
     builder.setMessage(message);
-    builder.setPositiveButton(R.string.button_ok, mClickListener);
+    builder.setPositiveButton(R.string.button_ok, clickListener);
     builder.show();
   }
-
-  private final OnClickListener mClickListener = new OnClickListener() {
-    public void onClick(DialogInterface dialog, int which) {
-      finish();
-    }
-  };
-
-  private final OnCancelListener mCancelListener = new OnCancelListener() {
-    public void onCancel(DialogInterface dialog) {
-      finish();
-    }
-  };
-
 }

android/src/com/google/zxing/client/android/HelpActivity.java

@@ -25,33 +25,46 @@ import android.webkit.WebViewClient;
 import android.widget.Button;
 
 /**
+ * An HTML-based help screen with Back and Done buttons at the bottom.
+ *
  * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class HelpActivity extends Activity {
-
   private static final String DEFAULT_URL = "file:///android_asset/html/index.html";
 
-  private WebView mWebView;
+  private WebView webView;
-  private Button mBackButton;
+  private Button backButton;
+
+  private final Button.OnClickListener backListener = new Button.OnClickListener() {
+    public void onClick(View view) {
+      webView.goBack();
+    }
+  };
+
+  private final Button.OnClickListener doneListener = new Button.OnClickListener() {
+    public void onClick(View view) {
+      finish();
+    }
+  };
 
   @Override
   protected void onCreate(Bundle icicle) {
     super.onCreate(icicle);
     setContentView(R.layout.help);
 
-    mWebView = (WebView)findViewById(R.id.help_contents);
+    webView = (WebView)findViewById(R.id.help_contents);
-    mWebView.setWebViewClient(new HelpClient());
+    webView.setWebViewClient(new HelpClient());
     if (icicle != null) {
-      mWebView.restoreState(icicle);
+      webView.restoreState(icicle);
     } else {
-      mWebView.loadUrl(DEFAULT_URL);
+      webView.loadUrl(DEFAULT_URL);
     }
 
-    mBackButton = (Button)findViewById(R.id.back_button);
+    backButton = (Button)findViewById(R.id.back_button);
-    mBackButton.setOnClickListener(mBackListener);
+    backButton.setOnClickListener(backListener);
 
     Button doneButton = (Button)findViewById(R.id.done_button);
-    doneButton.setOnClickListener(mDoneListener);
+    doneButton.setOnClickListener(doneListener);
   }
 
   @Override
@@ -61,40 +74,26 @@ public final class HelpActivity extends Activity {
 
   @Override
   protected void onSaveInstanceState(Bundle state) {
-    mWebView.saveState(state);
+    webView.saveState(state);
   }
 
   @Override
   public boolean onKeyDown(int keyCode, KeyEvent event) {
     if (keyCode == KeyEvent.KEYCODE_BACK) {
-      if (mWebView.canGoBack()) {
+      if (webView.canGoBack()) {
-        mWebView.goBack();
+        webView.goBack();
         return true;
       }
     }
     return super.onKeyDown(keyCode, event);
   }
 
-  private final Button.OnClickListener mBackListener = new Button.OnClickListener() {
-    public void onClick(View view) {
-      mWebView.goBack();
-    }
-  };
-
-  private final Button.OnClickListener mDoneListener = new Button.OnClickListener() {
-    public void onClick(View view) {
-      finish();
-    }
-  };
-
   private final class HelpClient extends WebViewClient {
-
     @Override
     public void onPageFinished(WebView view, String url) {
       setTitle(view.getTitle());
-      mBackButton.setEnabled(view.canGoBack());
+      backButton.setEnabled(view.canGoBack());
     }
-
   }
 
 }

android/src/com/google/zxing/client/android/Intents.java

@@ -16,8 +16,13 @@
 
 package com.google.zxing.client.android;
 
+/**
+ * This class provides the constants to use when sending an Intent to Barcode Scanner.
+ * These strings are effectively API and cannot be changed.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class Intents {
-
   private Intents() {
   }
 
@@ -28,9 +33,6 @@ public final class Intents {
      */
     public static final String ACTION = "com.google.zxing.client.android.SCAN";
 
-    // For compatibility only - do not use in new code, this will go away!
-    public static final String DEPRECATED_ACTION = "com.android.barcodes.SCAN";
-
     /**
      * By default, sending Scan.ACTION will decode all barcodes that we understand. However it
      * may be useful to limit scanning to certain formats. Use Intent.putExtra(MODE, value) with
@@ -79,9 +81,6 @@ public final class Intents {
      */
     public static final String ACTION = "com.google.zxing.client.android.ENCODE";
 
-    // For compatibility only - do not use in new code, this will go away!
-    public static final String DEPRECATED_ACTION = "com.android.barcodes.ENCODE";
-
     /**
      * The data to encode. Use Intent.putExtra(DATA, data) where data is either a String or a
      * Bundle, depending on the type and format specified. Non-QR Code formats should
@@ -112,9 +111,6 @@ public final class Intents {
      */
     public static final String ACTION = "com.google.zxing.client.android.SEARCH_BOOK_CONTENTS";
 
-    // For compatibility only - do not use in new code, this will go away!
-    public static final String DEPRECATED_ACTION = "com.android.barcodes.SEARCH_BOOK_CONTENTS";
-
     /**
      * The book to search, identified by ISBN number.
      */
@@ -139,5 +135,4 @@ public final class Intents {
     private Share() {
     }
   }
-
 }

android/src/com/google/zxing/client/android/InterleavedYUV422LuminanceSource.java

@@ -0,0 +1,138 @@
+/*
+ * Copyright 2009 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.zxing.client.android;
+
+import com.google.zxing.LuminanceSource;
+
+import android.graphics.Bitmap;
+
+/**
+ * This object extends LuminanceSource around an array of YUV data returned from the camera driver,
+ * with the option to crop to a rectangle within the full data. This can be used to exclude
+ * superfluous pixels around the perimeter and speed up decoding.
+ *
+ * It handles YUV 422 interleaved data, where each pixel consists of first a Y value, then
+ * a color value, with U and V alternating at each pixel.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class InterleavedYUV422LuminanceSource extends BaseLuminanceSource {
+  private final byte[] yuvData;
+  private final int dataWidth;
+  private final int dataHeight;
+  private final int left;
+  private final int top;
+
+  public InterleavedYUV422LuminanceSource(byte[] yuvData, int dataWidth, int dataHeight,
+      int left, int top, int width, int height) {
+    super(width, height);
+
+    if (left + width > dataWidth || top + height > dataHeight) {
+      throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
+    }
+
+    this.yuvData = yuvData;
+    this.dataWidth = dataWidth;
+    this.dataHeight = dataHeight;
+    this.left = left;
+    this.top = top;
+  }
+
+  @Override
+  public byte[] getRow(int y, byte[] row) {
+    if (y < 0 || y >= getHeight()) {
+      throw new IllegalArgumentException("Requested row is outside the image: " + y);
+    }
+    int width = getWidth();
+    if (row == null || row.length < width) {
+      row = new byte[width];
+    }
+    int offset = (y + top) * dataWidth * 2 + (left * 2);
+    byte[] yuv = yuvData;
+    for (int x = 0; x < width; x++) {
+      row[x] = yuv[offset + (x << 1)];
+    }
+    return row;
+  }
+
+  @Override
+  public byte[] getMatrix() {
+    int width = getWidth();
+    int height = getHeight();
+    int area = width * height;
+    byte[] matrix = new byte[area];
+    int inputOffset = top * dataWidth * 2 + (left * 2);
+    byte[] yuv = yuvData;
+
+    for (int y = 0; y < height; y++) {
+      int outputOffset = y * width;
+      for (int x = 0; x < width; x++) {
+        matrix[outputOffset + x] = yuv[inputOffset + (x << 1)];
+      }
+      inputOffset += (dataWidth * 2);
+    }
+    return matrix;
+  }
+
+  @Override
+  public boolean isCropSupported() {
+    return true;
+  }
+
+  @Override
+  public LuminanceSource crop(int left, int top, int width, int height) {
+    return new InterleavedYUV422LuminanceSource(yuvData, dataWidth, dataHeight, left, top,
+        width, height);
+  }
+
+  @Override
+  public int getDataWidth() {
+    return dataWidth;
+  }
+
+  @Override
+  public int getDataHeight() {
+    return dataHeight;
+  }
+
+  @Override
+  public Bitmap renderCroppedGreyscaleBitmap() {
+    int width = getWidth();
+    int height = getHeight();
+    int[] pixels = new int[width * height];
+    byte[] yuv = yuvData;
+    int inputOffset = top * dataWidth * 2 + (left * 2);
+
+    for (int y = 0; y < height; y++) {
+      int outputOffset = y * width;
+      for (int x = 0; x < width; x++) {
+        int grey = yuv[inputOffset + (x << 1)] & 0xff;
+        pixels[outputOffset + x] = (0xff000000) | (grey * 0x00010101);
+      }
+      inputOffset += (dataWidth * 2);
+    }
+
+    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+    return bitmap;
+  }
+
+  @Override
+  public Bitmap renderFullColorBitmap(boolean halfSize) {
+    return null;
+  }
+}

android/src/com/google/zxing/client/android/LocaleManager.java

@@ -22,9 +22,10 @@ import java.util.HashMap;
 
 /**
  * Handles any locale-specific logic for the client.
+ *
+ * @author Sean Owen
  */
 public final class LocaleManager {
-
   private static final String DEFAULT_TLD = "com";
   private static final Map<Locale,String> GOOGLE_COUNTRY_TLD;
   static {
@@ -93,5 +94,4 @@ public final class LocaleManager {
     }
     return tld;
   }
-
 }

android/src/com/google/zxing/client/android/PlanarYUVLuminanceSource.java

@@ -0,0 +1,147 @@
+/*
+ * Copyright 2009 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.zxing.client.android;
+
+import com.google.zxing.LuminanceSource;
+
+import android.graphics.Bitmap;
+
+/**
+ * This object extends LuminanceSource around an array of YUV data returned from the camera driver,
+ * with the option to crop to a rectangle within the full data. This can be used to exclude
+ * superfluous pixels around the perimeter and speed up decoding.
+ *
+ * It works for any pixel format where the Y channel is planar and appears first, including
+ * YCbCr_420_SP and YCbCr_422_SP. Any subsequent color data will be ignored.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class PlanarYUVLuminanceSource extends BaseLuminanceSource {
+  private final byte[] yuvData;
+  private final int dataWidth;
+  private final int dataHeight;
+  private final int left;
+  private final int top;
+
+  public PlanarYUVLuminanceSource(byte[] yuvData, int dataWidth, int dataHeight, int left, int top,
+      int width, int height) {
+    super(width, height);
+
+    if (left + width > dataWidth || top + height > dataHeight) {
+      throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
+    }
+
+    this.yuvData = yuvData;
+    this.dataWidth = dataWidth;
+    this.dataHeight = dataHeight;
+    this.left = left;
+    this.top = top;
+  }
+
+  @Override
+  public byte[] getRow(int y, byte[] row) {
+    if (y < 0 || y >= getHeight()) {
+      throw new IllegalArgumentException("Requested row is outside the image: " + y);
+    }
+    int width = getWidth();
+    if (row == null || row.length < width) {
+      row = new byte[width];
+    }
+    int offset = (y + top) * dataWidth + left;
+    System.arraycopy(yuvData, offset, row, 0, width);
+    return row;
+  }
+
+  @Override
+  public byte[] getMatrix() {
+    int width = getWidth();
+    int height = getHeight();
+
+    // If the caller asks for the entire underlying image, save the copy and give them the
+    // original data. The docs specifically warn that result.length must be ignored.
+    if (width == dataWidth && height == dataHeight) {
+      return yuvData;
+    }
+
+    int area = width * height;
+    byte[] matrix = new byte[area];
+    int inputOffset = top * dataWidth + left;
+
+    // If the width matches the full width of the underlying data, perform a single copy.
+    if (width == dataWidth) {
+      System.arraycopy(yuvData, inputOffset, matrix, 0, area);
+      return matrix;
+    }
+
+    // Otherwise copy one cropped row at a time.
+    byte[] yuv = yuvData;
+    for (int y = 0; y < height; y++) {
+      int outputOffset = y * width;
+      System.arraycopy(yuv, inputOffset, matrix, outputOffset, width);
+      inputOffset += dataWidth;
+    }
+    return matrix;
+  }
+
+  @Override
+  public boolean isCropSupported() {
+    return true;
+  }
+
+  @Override
+  public LuminanceSource crop(int left, int top, int width, int height) {
+    return new PlanarYUVLuminanceSource(yuvData, dataWidth, dataHeight, left, top, width, height);
+  }
+
+  @Override
+  public int getDataWidth() {
+    return dataWidth;
+  }
+
+  @Override
+  public int getDataHeight() {
+    return dataHeight;
+  }
+
+  @Override
+  public Bitmap renderCroppedGreyscaleBitmap() {
+    int width = getWidth();
+    int height = getHeight();
+    int[] pixels = new int[width * height];
+    byte[] yuv = yuvData;
+    int inputOffset = top * dataWidth + left;
+
+    for (int y = 0; y < height; y++) {
+      int outputOffset = y * width;
+      for (int x = 0; x < width; x++) {
+        int grey = yuv[inputOffset + x] & 0xff;
+        pixels[outputOffset + x] = (0xff000000) | (grey * 0x00010101);
+      }
+      inputOffset += dataWidth;
+    }
+
+    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+    return bitmap;
+  }
+
+  // Can't be implemented here, as the color representations vary.
+  @Override
+  public Bitmap renderFullColorBitmap(boolean halfSize) {
+    return null;
+  }
+}

android/src/com/google/zxing/client/android/PreferencesActivity.java

@@ -23,6 +23,11 @@ import android.preference.CheckBoxPreference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceScreen;
 
+/**
+ * The main settings activity.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class PreferencesActivity extends PreferenceActivity
     implements OnSharedPreferenceChangeListener {
 
@@ -36,8 +41,8 @@ public final class PreferencesActivity extends PreferenceActivity
 
   static final String KEY_HELP_VERSION_SHOWN = "preferences_help_version_shown";
 
-  CheckBoxPreference mDecode1D;
+  CheckBoxPreference decode1D;
-  CheckBoxPreference mDecodeQR;
+  CheckBoxPreference decodeQR;
 
   @Override
   protected void onCreate(Bundle icicle) {
@@ -46,19 +51,18 @@ public final class PreferencesActivity extends PreferenceActivity
 
     PreferenceScreen preferences = getPreferenceScreen();
     preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
-    mDecode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
+    decode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
-    mDecodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
+    decodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
   }
 
   // Prevent the user from turning off both decode options
   public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
     if (key.equals(KEY_DECODE_1D)) {
-      mDecodeQR.setEnabled(mDecode1D.isChecked());
+      decodeQR.setEnabled(decode1D.isChecked());
-      mDecodeQR.setChecked(true);
+      decodeQR.setChecked(true);
     } else if (key.equals(KEY_DECODE_QR)) {
-      mDecode1D.setEnabled(mDecodeQR.isChecked());
+      decode1D.setEnabled(decodeQR.isChecked());
-      mDecode1D.setChecked(true);
+      decode1D.setChecked(true);
     }
   }
-
 }

android/src/com/google/zxing/client/android/QRCodeEncoder.java

@@ -16,6 +16,11 @@
 
 package com.google.zxing.client.android;
 
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.MultiFormatWriter;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.ByteMatrix;
+
 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
@@ -23,48 +28,49 @@ import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.provider.Contacts;
-import android.util.Log;
 import android.telephony.PhoneNumberUtils;
-import com.google.zxing.BarcodeFormat;
+import android.util.Log;
-import com.google.zxing.MultiFormatWriter;
-import com.google.zxing.WriterException;
-import com.google.zxing.common.ByteMatrix;
 
+/**
+ * This class does the work of decoding the user's request and extracting all the data
+ * to be encoded in a QR Code.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class QRCodeEncoder {
-
+  private final Activity activity;
-  private final Activity mActivity;
+  private String contents;
-  private String mContents;
+  private String displayContents;
-  private String mDisplayContents;
+  private String title;
-  private String mTitle;
+  private BarcodeFormat format;
-  private BarcodeFormat mFormat;
 
   public QRCodeEncoder(Activity activity, Intent intent) {
-    mActivity = activity;
+    this.activity = activity;
     if (!encodeContents(intent)) {
       throw new IllegalArgumentException("No valid data to encode.");
     }
   }
 
   public void requestBarcode(Handler handler, int pixelResolution) {
-    Thread encodeThread = new EncodeThread(mContents, handler, pixelResolution,
+    Thread encodeThread = new EncodeThread(contents, handler, pixelResolution,
-        mFormat);
+        format);
     encodeThread.start();
   }
 
   public String getContents() {
-    return mContents;
+    return contents;
   }
 
   public String getDisplayContents() {
-    return mDisplayContents;
+    return displayContents;
   }
 
   public String getTitle() {
-    return mTitle;
+    return title;
   }
   
   public String getFormat() {
-    return mFormat.toString();
+    return format.toString();
   }
 
   // It would be nice if the string encoding lived in the core ZXing library,
@@ -82,59 +88,59 @@ public final class QRCodeEncoder {
       if (type == null || type.length() == 0) {
         return false;
       }
-      mFormat = BarcodeFormat.QR_CODE;
+      this.format = BarcodeFormat.QR_CODE;
       encodeQRCodeContents(intent, type);
     } else {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && data.length() != 0) {
-        mContents = data;
+        contents = data;
-        mDisplayContents = data;
+        displayContents = data;
-        mTitle = mActivity.getString(R.string.contents_text);
+        title = activity.getString(R.string.contents_text);
         if (format.equals(Contents.Format.CODE_128))
-          mFormat = BarcodeFormat.CODE_128;
+          this.format = BarcodeFormat.CODE_128;
         else if (format.equals(Contents.Format.CODE_39))
-          mFormat = BarcodeFormat.CODE_39;
+          this.format = BarcodeFormat.CODE_39;
         else if (format.equals(Contents.Format.EAN_8))
-          mFormat = BarcodeFormat.EAN_8;
+          this.format = BarcodeFormat.EAN_8;
         else if (format.equals(Contents.Format.EAN_13))
-          mFormat = BarcodeFormat.EAN_13;
+          this.format = BarcodeFormat.EAN_13;
         else if (format.equals(Contents.Format.UPC_A))
-          mFormat = BarcodeFormat.UPC_A;
+          this.format = BarcodeFormat.UPC_A;
         else if (format.equals(Contents.Format.UPC_E))
-          mFormat = BarcodeFormat.UPC_E;
+          this.format = BarcodeFormat.UPC_E;
       }
     }
-    return mContents != null && mContents.length() > 0;
+    return contents != null && contents.length() > 0;
   }
 
   private void encodeQRCodeContents(Intent intent, String type) {
     if (type.equals(Contents.Type.TEXT)) {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && data.length() > 0) {
-        mContents = data;
+        contents = data;
-        mDisplayContents = data;
+        displayContents = data;
-        mTitle = mActivity.getString(R.string.contents_text);
+        title = activity.getString(R.string.contents_text);
       }
     } else if (type.equals(Contents.Type.EMAIL)) {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && data.length() > 0) {
-        mContents = "mailto:" + data;
+        contents = "mailto:" + data;
-        mDisplayContents = data;
+        displayContents = data;
-        mTitle = mActivity.getString(R.string.contents_email);
+        title = activity.getString(R.string.contents_email);
       }
     } else if (type.equals(Contents.Type.PHONE)) {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && data.length() > 0) {
-        mContents = "tel:" + data;
+        contents = "tel:" + data;
-        mDisplayContents = PhoneNumberUtils.formatNumber(data);
+        displayContents = PhoneNumberUtils.formatNumber(data);
-        mTitle = mActivity.getString(R.string.contents_phone);
+        title = activity.getString(R.string.contents_phone);
       }
     } else if (type.equals(Contents.Type.SMS)) {
       String data = intent.getStringExtra(Intents.Encode.DATA);
       if (data != null && data.length() > 0) {
-        mContents = "sms:" + data;
+        contents = "sms:" + data;
-        mDisplayContents = PhoneNumberUtils.formatNumber(data);
+        displayContents = PhoneNumberUtils.formatNumber(data);
-        mTitle = mActivity.getString(R.string.contents_sms);
+        title = activity.getString(R.string.contents_sms);
       }
     } else if (type.equals(Contents.Type.CONTACT)) {
       Bundle bundle = intent.getBundleExtra(Intents.Encode.DATA);
@@ -169,12 +175,12 @@ public final class QRCodeEncoder {
         // Make sure we've encoded at least one field.
         if (newDisplayContents.length() > 0) {
           newContents.append(';');
-          mContents = newContents.toString();
+          contents = newContents.toString();
-          mDisplayContents = newDisplayContents.toString();
+          displayContents = newDisplayContents.toString();
-          mTitle = mActivity.getString(R.string.contents_contact);
+          title = activity.getString(R.string.contents_contact);
         } else {
-          mContents = null;
+          contents = null;
-          mDisplayContents = null;
+          displayContents = null;
         }
       }
     } else if (type.equals(Contents.Type.LOCATION)) {
@@ -184,36 +190,35 @@ public final class QRCodeEncoder {
         float latitude = bundle.getFloat("LAT", Float.MAX_VALUE);
         float longitude = bundle.getFloat("LONG", Float.MAX_VALUE);
         if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {
-          mContents = "geo:" + latitude + ',' + longitude;
+          contents = "geo:" + latitude + ',' + longitude;
-          mDisplayContents = latitude + "," + longitude;
+          displayContents = latitude + "," + longitude;
-          mTitle = mActivity.getString(R.string.contents_location);
+          title = activity.getString(R.string.contents_location);
         }
       }
     }
   }
 
   private static final class EncodeThread extends Thread {
-
     private static final String TAG = "EncodeThread";
 
-    private final String mContents;
+    private final String contents;
-    private final Handler mHandler;
+    private final Handler handler;
-    private final int mPixelResolution;
+    private final int pixelResolution;
-    private final BarcodeFormat mFormat;
+    private final BarcodeFormat format;
 
     EncodeThread(String contents, Handler handler, int pixelResolution,
         BarcodeFormat format) {
-      mContents = contents;
+      this.contents = contents;
-      mHandler = handler;
+      this.handler = handler;
-      mPixelResolution = pixelResolution;
+      this.pixelResolution = pixelResolution;
-      mFormat = format;
+      this.format = format;
     }
 
     @Override
     public void run() {
       try {
-        ByteMatrix result = new MultiFormatWriter().encode(mContents,
+        ByteMatrix result = new MultiFormatWriter().encode(contents, format,
-            mFormat, mPixelResolution, mPixelResolution);
+            pixelResolution, pixelResolution);
         int width = result.getWidth();
         int height = result.getHeight();
         byte[][] array = result.getArray();
@@ -228,19 +233,18 @@ public final class QRCodeEncoder {
 
         Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
         bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
-        Message message = Message.obtain(mHandler, R.id.encode_succeeded);
+        Message message = Message.obtain(handler, R.id.encode_succeeded);
         message.obj = bitmap;
         message.sendToTarget();
       } catch (WriterException e) {
         Log.e(TAG, e.toString());
-        Message message = Message.obtain(mHandler, R.id.encode_failed);
+        Message message = Message.obtain(handler, R.id.encode_failed);
         message.sendToTarget();
       } catch (IllegalArgumentException e) {
         Log.e(TAG, e.toString());
-        Message message = Message.obtain(mHandler, R.id.encode_failed);
+        Message message = Message.obtain(handler, R.id.encode_failed);
         message.sendToTarget();
       }
     }
   }
-
 }

android/src/com/google/zxing/client/android/SearchBookContentsActivity.java

@@ -48,17 +48,53 @@ import java.net.URI;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Uses Google Book Search to find a word or phrase in the requested book.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class SearchBookContentsActivity extends Activity {
-
   private static final String TAG = "SearchBookContents";
   private static final String USER_AGENT = "ZXing (Android)";
 
-  private NetworkThread mNetworkThread;
+  private NetworkThread networkThread;
-  private String mISBN;
+  private String isbn;
-  private EditText mQueryTextView;
+  private EditText queryTextView;
-  private Button mQueryButton;
+  private Button queryButton;
-  private ListView mResultListView;
+  private ListView resultListView;
-  private TextView mHeaderView;
+  private TextView headerView;
+
+  public final Handler handler = new Handler() {
+    @Override
+    public void handleMessage(Message message) {
+      switch (message.what) {
+        case R.id.search_book_contents_succeeded:
+          handleSearchResults((JSONObject) message.obj);
+          resetForNewQuery();
+          break;
+        case R.id.search_book_contents_failed:
+          resetForNewQuery();
+          headerView.setText(R.string.msg_sbc_failed);
+          break;
+      }
+    }
+  };
+
+  private final Button.OnClickListener buttonListener = new Button.OnClickListener() {
+    public void onClick(View view) {
+      launchSearch();
+    }
+  };
+
+  private final View.OnKeyListener keyListener = new View.OnKeyListener() {
+    public boolean onKey(View view, int keyCode, KeyEvent event) {
+      if (keyCode == KeyEvent.KEYCODE_ENTER) {
+        launchSearch();
+        return true;
+      }
+      return false;
+    }
+  };
 
   @Override
   public void onCreate(Bundle icicle) {
@@ -69,39 +105,38 @@ public final class SearchBookContentsActivity extends Activity {
     CookieManager.getInstance().removeExpiredCookie();
 
     Intent intent = getIntent();
-    if (intent == null || (!intent.getAction().equals(Intents.SearchBookContents.ACTION) &&
+    if (intent == null || (!intent.getAction().equals(Intents.SearchBookContents.ACTION))) {
-        !intent.getAction().equals(Intents.SearchBookContents.DEPRECATED_ACTION))) {
       finish();
       return;
     }
 
-    mISBN = intent.getStringExtra(Intents.SearchBookContents.ISBN);
+    isbn = intent.getStringExtra(Intents.SearchBookContents.ISBN);
-    setTitle(getString(R.string.sbc_name) + ": ISBN " + mISBN);
+    setTitle(getString(R.string.sbc_name) + ": ISBN " + isbn);
 
     setContentView(R.layout.search_book_contents);
-    mQueryTextView = (EditText) findViewById(R.id.query_text_view);
+    queryTextView = (EditText) findViewById(R.id.query_text_view);
 
     String initialQuery = intent.getStringExtra(Intents.SearchBookContents.QUERY);
     if (initialQuery != null && initialQuery.length() > 0) {
       // Populate the search box but don't trigger the search
-      mQueryTextView.setText(initialQuery);
+      queryTextView.setText(initialQuery);
     }
-    mQueryTextView.setOnKeyListener(mKeyListener);
+    queryTextView.setOnKeyListener(keyListener);
 
-    mQueryButton = (Button) findViewById(R.id.query_button);
+    queryButton = (Button) findViewById(R.id.query_button);
-    mQueryButton.setOnClickListener(mButtonListener);
+    queryButton.setOnClickListener(buttonListener);
 
-    mResultListView = (ListView) findViewById(R.id.result_list_view);
+    resultListView = (ListView) findViewById(R.id.result_list_view);
     LayoutInflater factory = LayoutInflater.from(this);
-    mHeaderView = (TextView) factory.inflate(R.layout.search_book_contents_header,
+    headerView = (TextView) factory.inflate(R.layout.search_book_contents_header,
-        mResultListView, false);
+        resultListView, false);
-    mResultListView.addHeaderView(mHeaderView);
+    resultListView.addHeaderView(headerView);
   }
 
   @Override
   protected void onResume() {
     super.onResume();
-    mQueryTextView.selectAll();
+    queryTextView.selectAll();
   }
 
   @Override
@@ -110,55 +145,23 @@ public final class SearchBookContentsActivity extends Activity {
     super.onConfigurationChanged(config);
   }
 
-  public final Handler mHandler = new Handler() {
-    @Override
-    public void handleMessage(Message message) {
-      switch (message.what) {
-        case R.id.search_book_contents_succeeded:
-          handleSearchResults((JSONObject) message.obj);
-          resetForNewQuery();
-          break;
-        case R.id.search_book_contents_failed:
-          resetForNewQuery();
-          mHeaderView.setText(R.string.msg_sbc_failed);
-          break;
-      }
-    }
-  };
-
   private void resetForNewQuery() {
-    mNetworkThread = null;
+    networkThread = null;
-    mQueryTextView.setEnabled(true);
+    queryTextView.setEnabled(true);
-    mQueryTextView.selectAll();
+    queryTextView.selectAll();
-    mQueryButton.setEnabled(true);
+    queryButton.setEnabled(true);
   }
 
-  private final Button.OnClickListener mButtonListener = new Button.OnClickListener() {
-    public void onClick(View view) {
-      launchSearch();
-    }
-  };
-
-  private final View.OnKeyListener mKeyListener = new View.OnKeyListener() {
-    public boolean onKey(View view, int keyCode, KeyEvent event) {
-      if (keyCode == KeyEvent.KEYCODE_ENTER) {
-        launchSearch();
-        return true;
-      }
-      return false;
-    }
-  };
-
   private void launchSearch() {
-    if (mNetworkThread == null) {
+    if (networkThread == null) {
-      String query = mQueryTextView.getText().toString();
+      String query = queryTextView.getText().toString();
       if (query != null && query.length() > 0) {
-        mNetworkThread = new NetworkThread(mISBN, query, mHandler);
+        networkThread = new NetworkThread(isbn, query, handler);
-        mNetworkThread.start();
+        networkThread.start();
-        mHeaderView.setText(R.string.msg_sbc_searching_book);
+        headerView.setText(R.string.msg_sbc_searching_book);
-        mResultListView.setAdapter(null);
+        resultListView.setAdapter(null);
-        mQueryTextView.setEnabled(false);
+        queryTextView.setEnabled(false);
-        mQueryButton.setEnabled(false);
+        queryButton.setEnabled(false);
       }
     }
   }
@@ -168,26 +171,26 @@ public final class SearchBookContentsActivity extends Activity {
   private void handleSearchResults(JSONObject json) {
     try {
       int count = json.getInt("number_of_results");
-      mHeaderView.setText("Found " + (count == 1 ? "1 result" : count + " results"));
+      headerView.setText("Found " + (count == 1 ? "1 result" : count + " results"));
       if (count > 0) {
         JSONArray results = json.getJSONArray("search_results");
-        SearchBookContentsResult.setQuery(mQueryTextView.getText().toString());
+        SearchBookContentsResult.setQuery(queryTextView.getText().toString());
         List<SearchBookContentsResult> items = new ArrayList<SearchBookContentsResult>(count);
         for (int x = 0; x < count; x++) {
           items.add(parseResult(results.getJSONObject(x)));
         }
-        mResultListView.setAdapter(new SearchBookContentsAdapter(this, items));
+        resultListView.setAdapter(new SearchBookContentsAdapter(this, items));
       } else {
         String searchable = json.optString("searchable");
         if ("false".equals(searchable)) {
-          mHeaderView.setText(R.string.msg_sbc_book_not_searchable);
+          headerView.setText(R.string.msg_sbc_book_not_searchable);
         }
-        mResultListView.setAdapter(null);
+        resultListView.setAdapter(null);
       }
     } catch (JSONException e) {
       Log.e(TAG, e.toString());
-      mResultListView.setAdapter(null);
+      resultListView.setAdapter(null);
-      mHeaderView.setText(R.string.msg_sbc_failed);
+      headerView.setText(R.string.msg_sbc_failed);
     }
   }
 
@@ -223,15 +226,14 @@ public final class SearchBookContentsActivity extends Activity {
   }
 
   private static final class NetworkThread extends Thread {
-
+    private final String isbn;
-    private final String mISBN;
+    private final String query;
-    private final String mQuery;
+    private final Handler handler;
-    private final Handler mHandler;
 
     NetworkThread(String isbn, String query, Handler handler) {
-      mISBN = isbn;
+      this.isbn = isbn;
-      mQuery = query;
+      this.query = query;
-      mHandler = handler;
+      this.handler = handler;
     }
 
     @Override
@@ -241,8 +243,8 @@ public final class SearchBookContentsActivity extends Activity {
         // These return a JSON result which describes if and where the query was found. This API may
         // break or disappear at any time in the future. Since this is an API call rather than a
         // website, we don't use LocaleManager to change the TLD.
-        URI uri = new URI("http", null, "www.google.com", -1, "/books", "vid=isbn" + mISBN +
+        URI uri = new URI("http", null, "www.google.com", -1, "/books", "vid=isbn" + isbn +
-            "&jscmd=SearchWithinVolume2&q=" + mQuery, null);
+            "&jscmd=SearchWithinVolume2&q=" + query, null);
         HttpUriRequest get = new HttpGet(uri);
         get.setHeader("cookie", getCookie(uri.toString()));
         client = AndroidHttpClient.newInstance(USER_AGENT);
@@ -255,17 +257,17 @@ public final class SearchBookContentsActivity extends Activity {
           JSONObject json = new JSONObject(jsonHolder.toString(getEncoding(entity)));
           jsonHolder.close();
 
-          Message message = Message.obtain(mHandler, R.id.search_book_contents_succeeded);
+          Message message = Message.obtain(handler, R.id.search_book_contents_succeeded);
           message.obj = json;
           message.sendToTarget();
         } else {
           Log.e(TAG, "HTTP returned " + response.getStatusLine().getStatusCode() + " for " + uri);
-          Message message = Message.obtain(mHandler, R.id.search_book_contents_failed);
+          Message message = Message.obtain(handler, R.id.search_book_contents_failed);
           message.sendToTarget();
         }
       } catch (Exception e) {
         Log.e(TAG, e.toString());
-        Message message = Message.obtain(mHandler, R.id.search_book_contents_failed);
+        Message message = Message.obtain(handler, R.id.search_book_contents_failed);
         message.sendToTarget();
       } finally {
         if (client != null) {
@@ -316,5 +318,4 @@ public final class SearchBookContentsActivity extends Activity {
 //            return "UTF-8";
     }
   }
-
 }

android/src/com/google/zxing/client/android/SearchBookContentsAdapter.java

@@ -24,8 +24,12 @@ import android.widget.ArrayAdapter;
 
 import java.util.List;
 
+/**
+ * Manufactures list items which represent SBC results.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class SearchBookContentsAdapter extends ArrayAdapter<SearchBookContentsResult> {
-
   public SearchBookContentsAdapter(Context context, List<SearchBookContentsResult> items) {
     super(context, R.layout.search_book_contents_list_item, 0, items);
   }
@@ -50,5 +54,4 @@ public final class SearchBookContentsAdapter extends ArrayAdapter<SearchBookCont
     listItem.set(result);
     return listItem;
   }
-
 }

android/src/com/google/zxing/client/android/SearchBookContentsListItem.java

@@ -25,10 +25,14 @@ import android.util.AttributeSet;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
+/**
+ * A list item which displays the page number and snippet of this search result.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class SearchBookContentsListItem extends LinearLayout {
-
+  private TextView pageNumberView;
-  private TextView mPageNumberView;
+  private TextView snippetView;
-  private TextView mSnippetView;
 
   SearchBookContentsListItem(Context context) {
     super(context);
@@ -41,12 +45,12 @@ public final class SearchBookContentsListItem extends LinearLayout {
   @Override
   protected void onFinishInflate() {
     super.onFinishInflate();
-    mPageNumberView = (TextView) findViewById(R.id.page_number_view);
+    pageNumberView = (TextView) findViewById(R.id.page_number_view);
-    mSnippetView = (TextView) findViewById(R.id.snippet_view);
+    snippetView = (TextView) findViewById(R.id.snippet_view);
   }
 
   public void set(SearchBookContentsResult result) {
-    mPageNumberView.setText(result.getPageNumber());
+    pageNumberView.setText(result.getPageNumber());
     String snippet = result.getSnippet();
     if (snippet.length() > 0) {
       if (result.getValidSnippet()) {
@@ -64,14 +68,13 @@ public final class SearchBookContentsListItem extends LinearLayout {
           styledSnippet.setSpan(boldSpan, pos, pos + queryLength, 0);
           offset = pos + queryLength;
         }
-        mSnippetView.setText(styledSnippet);
+        snippetView.setText(styledSnippet);
       } else {
         // This may be an error message, so don't try to bold the query terms within it
-        mSnippetView.setText(snippet);
+        snippetView.setText(snippet);
       }
     } else {
-      mSnippetView.setText("");
+      snippetView.setText("");
     }
   }
-
 }

android/src/com/google/zxing/client/android/SearchBookContentsResult.java

@@ -16,38 +16,41 @@
 
 package com.google.zxing.client.android;
 
+/**
+ * The underlying data for a SBC result.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class SearchBookContentsResult {
+  private static String query;
 
-  private static String sQuery;
+  private final String pageNumber;
-
+  private final String snippet;
-  private final String mPageNumber;
+  private final boolean validSnippet;
-  private final String mSnippet;
-  private final boolean mValidSnippet;
 
   public SearchBookContentsResult(String pageNumber, String snippet, boolean validSnippet) {
-    mPageNumber = pageNumber;
+    this.pageNumber = pageNumber;
-    mSnippet = snippet;
+    this.snippet = snippet;
-    mValidSnippet = validSnippet;
+    this.validSnippet = validSnippet;
   }
 
   public static void setQuery(String query) {
-    sQuery = query;
+    SearchBookContentsResult.query = query;
   }
 
   public String getPageNumber() {
-    return mPageNumber;
+    return pageNumber;
   }
 
   public String getSnippet() {
-    return mSnippet;
+    return snippet;
   }
 
   public boolean getValidSnippet() {
-    return mValidSnippet;
+    return validSnippet;
   }
 
   public static String getQuery() {
-    return sQuery;
+    return query;
   }
-
 }

android/src/com/google/zxing/client/android/ShareActivity.java

@@ -29,8 +29,13 @@ import android.text.ClipboardManager;
 import android.view.View;
 import android.widget.Button;
 
+/**
+ * Barcode Scanner can share data like contacts and bookmarks by displaying a QR Code on screen,
+ * such that another user can scan the barcode with their phone.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class ShareActivity extends Activity {
-
   private static final int PICK_BOOKMARK = 0;
   private static final int PICK_CONTACT = 1;
 
@@ -51,43 +56,16 @@ public final class ShareActivity extends Activity {
       Contacts.PhonesColumns.NUMBER // 1
   };
 
-  private Button mClipboardButton;
+  private Button clipboardButton;
 
-  @Override
+  private final Button.OnClickListener contactListener = new Button.OnClickListener() {
-  public void onCreate(Bundle icicle) {
-    super.onCreate(icicle);
-    setContentView(R.layout.share);
-
-    Button mContactButton = (Button) findViewById(R.id.contact_button);
-    mContactButton.setOnClickListener(mContactListener);
-    Button mBookmarkButton = (Button) findViewById(R.id.bookmark_button);
-    mBookmarkButton.setOnClickListener(mBookmarkListener);
-    mClipboardButton = (Button) findViewById(R.id.clipboard_button);
-    mClipboardButton.setOnClickListener(mClipboardListener);
-  }
-
-  @Override
-  protected void onResume() {
-    super.onResume();
-
-    ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
-    if (clipboard.hasText()) {
-      mClipboardButton.setEnabled(true);
-      mClipboardButton.setText(R.string.button_share_clipboard);
-    } else {
-      mClipboardButton.setEnabled(false);
-      mClipboardButton.setText(R.string.button_clipboard_empty);
-    }
-  }
-
-  private final Button.OnClickListener mContactListener = new Button.OnClickListener() {
     public void onClick(View v) {
       startActivityForResult(new Intent(Intent.ACTION_PICK, Contacts.People.CONTENT_URI),
           PICK_CONTACT);
     }
   };
 
-  private final Button.OnClickListener mBookmarkListener = new Button.OnClickListener() {
+  private final Button.OnClickListener bookmarkListener = new Button.OnClickListener() {
     public void onClick(View v) {
       Intent intent = new Intent(Intent.ACTION_PICK);
       intent.setClassName(ShareActivity.this, BookmarkPickerActivity.class.getName());
@@ -95,7 +73,7 @@ public final class ShareActivity extends Activity {
     }
   };
 
-  private final Button.OnClickListener mClipboardListener = new Button.OnClickListener() {
+  private final Button.OnClickListener clipboardListener = new Button.OnClickListener() {
     public void onClick(View v) {
       ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
       // Should always be true, because we grey out the clipboard button in onResume() if it's empty
@@ -109,6 +87,33 @@ public final class ShareActivity extends Activity {
     }
   };
 
+  @Override
+  public void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+    setContentView(R.layout.share);
+
+    Button mContactButton = (Button) findViewById(R.id.contact_button);
+    mContactButton.setOnClickListener(contactListener);
+    Button mBookmarkButton = (Button) findViewById(R.id.bookmark_button);
+    mBookmarkButton.setOnClickListener(bookmarkListener);
+    clipboardButton = (Button) findViewById(R.id.clipboard_button);
+    clipboardButton.setOnClickListener(clipboardListener);
+  }
+
+  @Override
+  protected void onResume() {
+    super.onResume();
+
+    ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+    if (clipboard.hasText()) {
+      clipboardButton.setEnabled(true);
+      clipboardButton.setText(R.string.button_share_clipboard);
+    } else {
+      clipboardButton.setEnabled(false);
+      clipboardButton.setText(R.string.button_clipboard_empty);
+    }
+  }
+
   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent intent) {
     if (resultCode == RESULT_OK) {
@@ -213,5 +218,4 @@ public final class ShareActivity extends Activity {
     }
     return data;
   }
-
 }

android/src/com/google/zxing/client/android/ViewfinderView.java

@@ -28,34 +28,35 @@ import android.view.View;
 /**
  * This view is overlaid on top of the camera preview. It adds the viewfinder rectangle and partial
  * transparency outside it, as well as the laser scanner animation and result points.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class ViewfinderView extends View {
-
   private static final int[] SCANNER_ALPHA = {0, 64, 128, 192, 255, 192, 128, 64};
   private static final long ANIMATION_DELAY = 100L;
 
-  private final Paint mPaint;
+  private final Paint paint;
-  private final Rect mBox;
+  private final Rect box;
-  private Bitmap mResultBitmap;
+  private Bitmap resultBitmap;
-  private final int mMaskColor;
+  private final int maskColor;
-  private final int mResultColor;
+  private final int resultColor;
-  private final int mFrameColor;
+  private final int frameColor;
-  private final int mLaserColor;
+  private final int laserColor;
-  private int mScannerAlpha;
+  private int scannerAlpha;
 
   // This constructor is used when the class is built from an XML resource.
   public ViewfinderView(Context context, AttributeSet attrs) {
     super(context, attrs);
 
     // Initialize these once for performance rather than calling them every time in onDraw().
-    mPaint = new Paint();
+    paint = new Paint();
-    mBox = new Rect();
+    box = new Rect();
     Resources resources = getResources();
-    mMaskColor = resources.getColor(R.color.viewfinder_mask);
+    maskColor = resources.getColor(R.color.viewfinder_mask);
-    mResultColor = resources.getColor(R.color.result_view);
+    resultColor = resources.getColor(R.color.result_view);
-    mFrameColor = resources.getColor(R.color.viewfinder_frame);
+    frameColor = resources.getColor(R.color.viewfinder_frame);
-    mLaserColor = resources.getColor(R.color.viewfinder_laser);
+    laserColor = resources.getColor(R.color.viewfinder_laser);
-    mScannerAlpha = 0;
+    scannerAlpha = 0;
   }
 
   @Override
@@ -65,48 +66,48 @@ public final class ViewfinderView extends View {
     int height = canvas.getHeight();
 
     // Draw the exterior (i.e. outside the framing rect) darkened
-    mPaint.setColor(mResultBitmap != null ? mResultColor : mMaskColor);
+    paint.setColor(resultBitmap != null ? resultColor : maskColor);
-    mBox.set(0, 0, width, frame.top);
+    box.set(0, 0, width, frame.top);
-    canvas.drawRect(mBox, mPaint);
+    canvas.drawRect(box, paint);
-    mBox.set(0, frame.top, frame.left, frame.bottom + 1);
+    box.set(0, frame.top, frame.left, frame.bottom + 1);
-    canvas.drawRect(mBox, mPaint);
+    canvas.drawRect(box, paint);
-    mBox.set(frame.right + 1, frame.top, width, frame.bottom + 1);
+    box.set(frame.right + 1, frame.top, width, frame.bottom + 1);
-    canvas.drawRect(mBox, mPaint);
+    canvas.drawRect(box, paint);
-    mBox.set(0, frame.bottom + 1, width, height);
+    box.set(0, frame.bottom + 1, width, height);
-    canvas.drawRect(mBox, mPaint);
+    canvas.drawRect(box, paint);
 
-    if (mResultBitmap != null) {
+    if (resultBitmap != null) {
       // Draw the opaque result bitmap over the scanning rectangle
-      mPaint.setAlpha(255);
+      paint.setAlpha(255);
-      canvas.drawBitmap(mResultBitmap, frame.left, frame.top, mPaint);
+      canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
     } else {
       // Draw a two pixel solid black border inside the framing rect
-      mPaint.setColor(mFrameColor);
+      paint.setColor(frameColor);
-      mBox.set(frame.left, frame.top, frame.right + 1, frame.top + 2);
+      box.set(frame.left, frame.top, frame.right + 1, frame.top + 2);
-      canvas.drawRect(mBox, mPaint);
+      canvas.drawRect(box, paint);
-      mBox.set(frame.left, frame.top + 2, frame.left + 2, frame.bottom - 1);
+      box.set(frame.left, frame.top + 2, frame.left + 2, frame.bottom - 1);
-      canvas.drawRect(mBox, mPaint);
+      canvas.drawRect(box, paint);
-      mBox.set(frame.right - 1, frame.top, frame.right + 1, frame.bottom - 1);
+      box.set(frame.right - 1, frame.top, frame.right + 1, frame.bottom - 1);
-      canvas.drawRect(mBox, mPaint);
+      canvas.drawRect(box, paint);
-      mBox.set(frame.left, frame.bottom - 1, frame.right + 1, frame.bottom + 1);
+      box.set(frame.left, frame.bottom - 1, frame.right + 1, frame.bottom + 1);
-      canvas.drawRect(mBox, mPaint);
+      canvas.drawRect(box, paint);
 
       // Draw a red "laser scanner" line through the middle to show decoding is active
-      mPaint.setColor(mLaserColor);
+      paint.setColor(laserColor);
-      mPaint.setAlpha(SCANNER_ALPHA[mScannerAlpha]);
+      paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
-      mScannerAlpha = (mScannerAlpha + 1) % SCANNER_ALPHA.length;
+      scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
       int middle = frame.height() / 2 + frame.top;
-      mBox.set(frame.left + 2, middle - 1, frame.right - 1, middle + 2);
+      box.set(frame.left + 2, middle - 1, frame.right - 1, middle + 2);
-      canvas.drawRect(mBox, mPaint);
+      canvas.drawRect(box, paint);
 
       // Request another update at the animation interval, but only repaint the laser line,
       // not the entire viewfinder mask.
-      postInvalidateDelayed(ANIMATION_DELAY, mBox.left, mBox.top, mBox.right, mBox.bottom);
+      postInvalidateDelayed(ANIMATION_DELAY, box.left, box.top, box.right, box.bottom);
     }
   }
 
   public void drawViewfinder() {
-    mResultBitmap = null;
+    resultBitmap = null;
     invalidate();
   }
 
@@ -116,8 +117,7 @@ public final class ViewfinderView extends View {
    * @param barcode An image of the decoded barcode.
    */
   public void drawResultBitmap(Bitmap barcode) {
-    mResultBitmap = barcode;
+    resultBitmap = barcode;
     invalidate();
   }
-
 }

android/src/com/google/zxing/client/android/result/AddressBookResultHandler.java

@@ -16,34 +16,39 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
-import android.telephony.PhoneNumberUtils;
-import android.text.SpannableString;
-import android.text.Spannable;
-import android.text.style.StyleSpan;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.AddressBookParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 
+import android.app.Activity;
+import android.telephony.PhoneNumberUtils;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.style.StyleSpan;
+
 import java.text.DateFormat;
 import java.text.ParsePosition;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
+/**
+ * Handles address book entries.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class AddressBookResultHandler extends ResultHandler {
-
   private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");
 
-  private final boolean[] mFields;
+  private final boolean[] fields;
-  private int mButtonCount;
+  private int buttonCount;
 
   // This takes all the work out of figuring out which buttons/actions should be in which
   // positions, based on which fields are present in this barcode.
   private int mapIndexToAction(int index) {
-    if (index < mButtonCount) {
+    if (index < buttonCount) {
       int count = -1;
       for (int x = 0; x < MAX_BUTTON_COUNT; x++) {
-        if (mFields[x]) {
+        if (fields[x]) {
           count++;
         }
         if (count == index) {
@@ -64,23 +69,23 @@ public final class AddressBookResultHandler extends ResultHandler {
     String[] emails = addressResult.getEmails();
     boolean hasEmailAddress = emails != null && emails.length > 0;
 
-    mFields = new boolean[MAX_BUTTON_COUNT];
+    fields = new boolean[MAX_BUTTON_COUNT];
-    mFields[0] = true; // Add contact is always available
+    fields[0] = true; // Add contact is always available
-    mFields[1] = hasAddress;
+    fields[1] = hasAddress;
-    mFields[2] = hasPhoneNumber;
+    fields[2] = hasPhoneNumber;
-    mFields[3] = hasEmailAddress;
+    fields[3] = hasEmailAddress;
 
-    mButtonCount = 0;
+    buttonCount = 0;
     for (int x = 0; x < MAX_BUTTON_COUNT; x++) {
-      if (mFields[x]) {
+      if (fields[x]) {
-        mButtonCount++;
+        buttonCount++;
       }
     }
   }
 
   @Override
   public int getButtonCount() {
-    return mButtonCount;
+    return buttonCount;
   }
 
   @Override
@@ -102,7 +107,7 @@ public final class AddressBookResultHandler extends ResultHandler {
 
   @Override
   public void handleButtonPress(int index) {
-    AddressBookParsedResult addressResult = (AddressBookParsedResult) mResult;
+    AddressBookParsedResult addressResult = (AddressBookParsedResult) result;
     int action = mapIndexToAction(index);
     switch (action) {
       case 0:
@@ -130,7 +135,7 @@ public final class AddressBookResultHandler extends ResultHandler {
   // Overriden so we can hyphenate phone numbers, format birthdays, and bold the name.
   @Override
   public CharSequence getDisplayContents() {
-    AddressBookParsedResult result = (AddressBookParsedResult) mResult;
+    AddressBookParsedResult result = (AddressBookParsedResult) this.result;
     StringBuffer contents = new StringBuffer();
     ParsedResult.maybeAppend(result.getNames(), contents);
     int namesLength = contents.length();
@@ -178,5 +183,4 @@ public final class AddressBookResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_address_book;
   }
-
 }

android/src/com/google/zxing/client/android/result/AndroidIntentParsedResult.java

@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2008 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.zxing.client.android.result;
-
-import android.content.Intent;
-import com.google.zxing.client.result.ParsedResult;
-import com.google.zxing.client.result.ParsedResultType;
-
-import java.net.URISyntaxException;
-
-/**
- * A {@link com.google.zxing.client.result.ParsedResult} derived from a URI that encodes an Android
- * {@link Intent}, and which should presumably trigger that intent on Android.
- */
-public final class AndroidIntentParsedResult extends ParsedResult {
-
-  private final Intent mIntent;
-
-  private AndroidIntentParsedResult(Intent intent) {
-    super(ParsedResultType.ANDROID_INTENT);
-    mIntent = intent;
-  }
-
-  public static AndroidIntentParsedResult parse(String rawText) {
-    try {
-      return new AndroidIntentParsedResult(Intent.getIntent(rawText));
-    } catch (URISyntaxException urise) {
-      return null;
-    } catch (IllegalArgumentException iae) {
-      return null;
-    }
-  }
-
-  public Intent getIntent() {
-    return mIntent;
-  }
-
-  @Override
-  public String getDisplayResult() {
-    return mIntent.toString();
-  }
-
-}

android/src/com/google/zxing/client/android/result/CalendarResultHandler.java

@@ -16,11 +16,12 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.CalendarParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 
+import android.app.Activity;
+
 import java.text.DateFormat;
 import java.text.ParsePosition;
 import java.text.SimpleDateFormat;
@@ -28,12 +29,16 @@ import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
 
+/**
+ * Handles calendar entries encoded in QR Codes.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public final class CalendarResultHandler extends ResultHandler {
-
   private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");
   private static final DateFormat DATE_TIME_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HHmmss");
 
-  private static final int[] mButtons = {
+  private static final int[] buttons = {
       R.string.button_add_calendar
   };
 
@@ -43,17 +48,17 @@ public final class CalendarResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    CalendarParsedResult calendarResult = (CalendarParsedResult) mResult;
+    CalendarParsedResult calendarResult = (CalendarParsedResult) result;
     switch (index) {
       case 0:
         addCalendarEvent(calendarResult.getSummary(), calendarResult.getStart(),
@@ -64,7 +69,7 @@ public final class CalendarResultHandler extends ResultHandler {
 
   @Override
   public CharSequence getDisplayContents() {
-    CalendarParsedResult calResult = (CalendarParsedResult) mResult;
+    CalendarParsedResult calResult = (CalendarParsedResult) result;
     StringBuffer result = new StringBuffer();
     ParsedResult.maybeAppend(calResult.getSummary(), result);
     appendTime(calResult.getStart(), result);
@@ -110,5 +115,4 @@ public final class CalendarResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_calendar;
   }
-
 }

android/src/com/google/zxing/client/android/result/EmailAddressResultHandler.java

@@ -16,14 +16,19 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.EmailAddressParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 
-public final class EmailAddressResultHandler extends ResultHandler {
+import android.app.Activity;
 
-  private static final int[] mButtons = {
+/**
+ * Handles email addresses.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class EmailAddressResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_email,
       R.string.button_add_contact
   };
@@ -34,17 +39,17 @@ public final class EmailAddressResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    EmailAddressParsedResult emailResult = (EmailAddressParsedResult) mResult;
+    EmailAddressParsedResult emailResult = (EmailAddressParsedResult) result;
     switch (index) {
       case 0:
         sendEmailFromUri(emailResult.getMailtoURI(), null, null);
@@ -61,5 +66,4 @@ public final class EmailAddressResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_email_address;
   }
-
 }

android/src/com/google/zxing/client/android/result/GeoResultHandler.java

@@ -16,14 +16,19 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.GeoParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 
-public final class GeoResultHandler extends ResultHandler {
+import android.app.Activity;
 
-  private static final int[] mButtons = {
+/**
+ * Handles geographic coordinates (typically encoded as geo: URLs).
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class GeoResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_show_map,
       R.string.button_get_directions
   };
@@ -34,17 +39,17 @@ public final class GeoResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    GeoParsedResult geoResult = (GeoParsedResult) mResult;
+    GeoParsedResult geoResult = (GeoParsedResult) result;
     switch (index) {
       case 0:
         openMap(geoResult.getGeoURI());
@@ -59,5 +64,4 @@ public final class GeoResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_geo;
   }
-
 }

android/src/com/google/zxing/client/android/result/ISBNResultHandler.java

@@ -16,44 +16,50 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-import com.google.zxing.client.android.R;
 import com.google.zxing.client.android.PreferencesActivity;
+import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ISBNParsedResult;
 import com.google.zxing.client.result.ParsedResult;
 
-public final class ISBNResultHandler extends ResultHandler {
+import android.app.Activity;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 
-  private static final int[] mButtons = {
+/**
+ * Handles books encoded by their ISBN values.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class ISBNResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_product_search,
       R.string.button_book_search,
       R.string.button_search_book_contents,
       R.string.button_custom_product_search,
   };
 
-  private final String mCustomProductSearch;
+  private final String customProductSearch;
 
   public ISBNResultHandler(Activity activity, ParsedResult result) {
     super(activity, result);
     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
-    mCustomProductSearch = prefs.getString(PreferencesActivity.KEY_CUSTOM_PRODUCT_SEARCH, null);
+    customProductSearch = prefs.getString(PreferencesActivity.KEY_CUSTOM_PRODUCT_SEARCH, null);
   }
 
   @Override
   public int getButtonCount() {
-    return mCustomProductSearch != null && mCustomProductSearch.length() > 0 ? mButtons.length : mButtons.length - 1;
+    return customProductSearch != null && customProductSearch.length() > 0 ? buttons.length : buttons
+        .length - 1;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    ISBNParsedResult isbnResult = (ISBNParsedResult) mResult;
+    ISBNParsedResult isbnResult = (ISBNParsedResult) result;
     switch (index) {
       case 0:
         openProductSearch(isbnResult.getISBN());
@@ -65,7 +71,7 @@ public final class ISBNResultHandler extends ResultHandler {
         searchBookContents(isbnResult.getISBN());
         break;
       case 3:
-        String url = mCustomProductSearch.replace("%s", isbnResult.getISBN());
+        String url = customProductSearch.replace("%s", isbnResult.getISBN());
         openURL(url);
         break;
     }
@@ -75,5 +81,4 @@ public final class ISBNResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_isbn;
   }
-
 }

android/src/com/google/zxing/client/android/result/ProductResultHandler.java

@@ -16,43 +16,48 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-import com.google.zxing.client.android.R;
 import com.google.zxing.client.android.PreferencesActivity;
+import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.ProductParsedResult;
 
-public final class ProductResultHandler extends ResultHandler {
+import android.app.Activity;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 
-  private static final int[] mButtons = {
+/**
+ * Handles generic products which are not books.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class ProductResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_product_search,
       R.string.button_web_search,
       R.string.button_custom_product_search,
   };
 
-  private final String mCustomProductSearch;
+  private final String customProductSearch;
 
   public ProductResultHandler(Activity activity, ParsedResult result) {
     super(activity, result);
     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
-    mCustomProductSearch = prefs.getString(PreferencesActivity.KEY_CUSTOM_PRODUCT_SEARCH, null);
+    customProductSearch = prefs.getString(PreferencesActivity.KEY_CUSTOM_PRODUCT_SEARCH, null);
   }
 
   @Override
   public int getButtonCount() {
-    return mCustomProductSearch != null ? mButtons.length : mButtons.length - 1;
+    return customProductSearch != null ? buttons.length : buttons.length - 1;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    ProductParsedResult productResult = (ProductParsedResult) mResult;
+    ProductParsedResult productResult = (ProductParsedResult) result;
     switch (index) {
       case 0:
         openProductSearch(productResult.getNormalizedProductID());
@@ -61,7 +66,7 @@ public final class ProductResultHandler extends ResultHandler {
         webSearch(productResult.getNormalizedProductID());
         break;
       case 2:
-        String url = mCustomProductSearch.replace("%s", productResult.getNormalizedProductID());
+        String url = customProductSearch.replace("%s", productResult.getNormalizedProductID());
         openURL(url);
         break;
     }
@@ -71,5 +76,4 @@ public final class ProductResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_product;
   }
-
 }

android/src/com/google/zxing/client/android/result/ResultButtonListener.java

@@ -22,19 +22,19 @@ import android.widget.Button;
 /**
  * Handles the result of barcode decoding in the context of the Android platform, by dispatching the
  * proper intents to open other activities like GMail, Maps, etc.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class ResultButtonListener implements Button.OnClickListener {
-
+  final ResultHandler resultHandler;
-  final ResultHandler mResultHandler;
+  final int index;
-  final int mIndex;
 
   public ResultButtonListener(ResultHandler resultHandler, int index) {
-    mResultHandler = resultHandler;
+    this.resultHandler = resultHandler;
-    mIndex = index;
+    this.index = index;
   }
 
   public void onClick(View view) {
-    mResultHandler.handleButtonPress(mIndex);
+    resultHandler.handleButtonPress(index);
   }
-
 }

android/src/com/google/zxing/client/android/result/ResultHandler.java

@@ -16,40 +16,50 @@
 
 package com.google.zxing.client.android.result;
 
+import com.google.zxing.client.android.Contents;
+import com.google.zxing.client.android.Intents;
+import com.google.zxing.client.android.LocaleManager;
+import com.google.zxing.client.android.R;
+import com.google.zxing.client.android.SearchBookContentsActivity;
+import com.google.zxing.client.result.ParsedResult;
+import com.google.zxing.client.result.ParsedResultType;
+
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.net.Uri;
 import android.provider.Contacts;
-import com.google.zxing.client.android.Intents;
-import com.google.zxing.client.android.R;
-import com.google.zxing.client.android.SearchBookContentsActivity;
-import com.google.zxing.client.android.LocaleManager;
-import com.google.zxing.client.android.Contents;
-import com.google.zxing.client.result.ParsedResult;
-import com.google.zxing.client.result.ParsedResultType;
 
+import java.text.DateFormat;
 import java.text.ParsePosition;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
-import java.text.DateFormat;
 import java.util.Date;
 import java.util.GregorianCalendar;
 
+/**
+ * A base class for the Android-specific barcode handlers. These allow the app to polymorphically
+ * suggest the appropriate actions for each data type.
+ *
+ * This class also contains a bunch of utility methods to take common actions like opening a URL.
+ * They could easily be moved into a helper object, but it can't be static because the Activity
+ * instance is needed to launch an intent.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
 public abstract class ResultHandler {
-
   private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");
   private static final DateFormat DATE_TIME_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HHmmss");
 
   public static final int MAX_BUTTON_COUNT = 4;
 
-  protected final ParsedResult mResult;
+  protected final ParsedResult result;
-  private final Activity mActivity;
+  private final Activity activity;
 
   protected ResultHandler(Activity activity, ParsedResult result) {
-    mResult = result;
+    this.result = result;
-    mActivity = activity;
+    this.activity = activity;
   }
 
   /**
@@ -81,7 +91,7 @@ public abstract class ResultHandler {
    * @return The text to be displayed.
    */
   public CharSequence getDisplayContents() {
-    String contents = mResult.getDisplayResult();
+    String contents = result.getDisplayResult();
     return contents.replace("\r", "");
   }
 
@@ -98,7 +108,7 @@ public abstract class ResultHandler {
    * @return The parsed type, e.g. URI or ISBN
    */
   public final ParsedResultType getType() {
-    return mResult.getType();
+    return result.getType();
   }
 
   /**
@@ -171,7 +181,7 @@ public abstract class ResultHandler {
   }
 
   public final void shareByEmail(String contents) {
-    sendEmailFromUri("mailto:", mActivity.getString(R.string.msg_share_subject_line), contents);
+    sendEmailFromUri("mailto:", activity.getString(R.string.msg_share_subject_line), contents);
   }
 
   public final void sendEmail(String address, String subject, String body) {
@@ -188,7 +198,7 @@ public abstract class ResultHandler {
   }
 
   public final void shareBySMS(String contents) {
-    sendSMSFromUri("smsto:", mActivity.getString(R.string.msg_share_subject_line) + ":\n" +
+    sendSMSFromUri("smsto:", activity.getString(R.string.msg_share_subject_line) + ":\n" +
         contents);
   }
 
@@ -212,7 +222,7 @@ public abstract class ResultHandler {
     Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(uri));
     // The Messaging app needs to see a valid subject or else it will treat this an an SMS.
     if (subject == null || subject.length() == 0) {
-      putExtra(intent, "subject", mActivity.getString(R.string.msg_default_mms_subject));
+      putExtra(intent, "subject", activity.getString(R.string.msg_default_mms_subject));
     } else {
       putExtra(intent, "subject", subject);
     }
@@ -267,7 +277,7 @@ public abstract class ResultHandler {
 
   public final void searchBookContents(String isbn) {
     Intent intent = new Intent(Intents.SearchBookContents.ACTION);
-    intent.setClassName(mActivity, SearchBookContentsActivity.class.getName());
+    intent.setClassName(activity, SearchBookContentsActivity.class.getName());
     putExtra(intent, Intents.SearchBookContents.ISBN, isbn);
     launchIntent(intent);
   }
@@ -285,11 +295,11 @@ public abstract class ResultHandler {
   private void launchIntent(Intent intent) {
     if (intent != null) {
       try {
-        mActivity.startActivity(intent);
+        activity.startActivity(intent);
       } catch (ActivityNotFoundException e) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);
+        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
-        builder.setTitle(mActivity.getString(R.string.app_name));
+        builder.setTitle(activity.getString(R.string.app_name));
-        builder.setMessage(mActivity.getString(R.string.msg_intent_failed));
+        builder.setMessage(activity.getString(R.string.msg_intent_failed));
         builder.setPositiveButton(R.string.button_ok, null);
         builder.show();
       }
@@ -301,5 +311,4 @@ public abstract class ResultHandler {
       intent.putExtra(key, value);
     }
   }
-
 }

android/src/com/google/zxing/client/android/result/ResultHandlerFactory.java

@@ -16,14 +16,19 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.Result;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.ParsedResultType;
 import com.google.zxing.client.result.ResultParser;
 
-public final class ResultHandlerFactory {
+import android.app.Activity;
 
+/**
+ * Manufactures Android-specific handlers based on the barcode content's type.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class ResultHandlerFactory {
   private ResultHandlerFactory() {
   }
 
@@ -57,22 +62,6 @@ public final class ResultHandlerFactory {
   }
 
   private static ParsedResult parseResult(Result rawResult) {
-    ParsedResult result = ResultParser.parseResult(rawResult);
+    return ResultParser.parseResult(rawResult);
-
-    // Disabled for now. To reactivate, create an AndroidIntentResultHandler.
-//        if (result.getType().equals(ParsedResultType.TEXT)) {
-//            String rawText = rawResult.getText();
-//            AndroidIntentParsedResult androidResult = AndroidIntentParsedResult.parse(rawText);
-//            if (androidResult != null) {
-//                Intent intent = androidResult.getIntent();
-//                if (!Intent.ACTION_VIEW.equals(intent.getAction())) {
-//                    // For now, don't take anything that just parses as a View action. A lot
-//                    // of things are accepted as a View action by default.
-//                    result = androidResult;
-//                }
-//            }
-//        }
-    return result;
   }
-
 }

android/src/com/google/zxing/client/android/result/SMSResultHandler.java

@@ -16,15 +16,20 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
-import android.telephony.PhoneNumberUtils;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.SMSParsedResult;
 
-public final class SMSResultHandler extends ResultHandler {
+import android.app.Activity;
+import android.telephony.PhoneNumberUtils;
 
-  private static final int[] mButtons = {
+/**
+ * Handles SMS addresses, offering a choice of composing a new SMS or MMS message.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class SMSResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_sms,
       R.string.button_mms
   };
@@ -35,17 +40,17 @@ public final class SMSResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    SMSParsedResult smsResult = (SMSParsedResult) mResult;
+    SMSParsedResult smsResult = (SMSParsedResult) result;
     switch (index) {
       case 0:
         sendSMS(smsResult.getNumber(), smsResult.getBody());
@@ -58,7 +63,7 @@ public final class SMSResultHandler extends ResultHandler {
 
   @Override
   public CharSequence getDisplayContents() {
-    SMSParsedResult smsResult = (SMSParsedResult) mResult;
+    SMSParsedResult smsResult = (SMSParsedResult) result;
     StringBuffer contents = new StringBuffer();
     ParsedResult.maybeAppend(PhoneNumberUtils.formatNumber(smsResult.getNumber()), contents);
     ParsedResult.maybeAppend(smsResult.getVia(), contents);
@@ -72,5 +77,4 @@ public final class SMSResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_sms;
   }
-
 }

android/src/com/google/zxing/client/android/result/TelResultHandler.java

@@ -16,15 +16,20 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
-import android.telephony.PhoneNumberUtils;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.TelParsedResult;
 
-public final class TelResultHandler extends ResultHandler {
+import android.app.Activity;
+import android.telephony.PhoneNumberUtils;
 
-  private static final int[] mButtons = {
+/**
+ * Offers relevant actions for telephone numbers.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class TelResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_dial,
       R.string.button_add_contact
   };
@@ -35,17 +40,17 @@ public final class TelResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    TelParsedResult telResult = (TelParsedResult) mResult;
+    TelParsedResult telResult = (TelParsedResult) result;
     switch (index) {
       case 0:
         dialPhoneFromUri(telResult.getTelURI());
@@ -61,7 +66,7 @@ public final class TelResultHandler extends ResultHandler {
   // Overriden so we can take advantage of Android's phone number hyphenation routines.
   @Override
   public CharSequence getDisplayContents() {
-    String contents = mResult.getDisplayResult();
+    String contents = result.getDisplayResult();
     contents = contents.replace("\r", "");
     return PhoneNumberUtils.formatNumber(contents);
   }
@@ -70,5 +75,4 @@ public final class TelResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_tel;
   }
-
 }

android/src/com/google/zxing/client/android/result/TextResultHandler.java

@@ -16,16 +16,18 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ParsedResult;
 
+import android.app.Activity;
+
 /**
- * This class handles TextParsedResult as well as unknown formats.
+ * This class handles TextParsedResult as well as unknown formats. It's the fallback handler.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
  */
 public final class TextResultHandler extends ResultHandler {
-
+  private static final int[] buttons = {
-  private static final int[] mButtons = {
       R.string.button_web_search,
       R.string.button_share_by_email,
       R.string.button_share_by_sms
@@ -37,25 +39,25 @@ public final class TextResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
     switch (index) {
       case 0:
-        webSearch(mResult.getDisplayResult());
+        webSearch(result.getDisplayResult());
         break;
       case 1:
-        shareByEmail(mResult.getDisplayResult());
+        shareByEmail(result.getDisplayResult());
         break;
       case 2:
-        shareBySMS(mResult.getDisplayResult());
+        shareBySMS(result.getDisplayResult());
         break;
     }
   }
@@ -64,5 +66,4 @@ public final class TextResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_text;
   }
-
 }

android/src/com/google/zxing/client/android/result/URIResultHandler.java

@@ -16,14 +16,19 @@
 
 package com.google.zxing.client.android.result;
 
-import android.app.Activity;
 import com.google.zxing.client.android.R;
 import com.google.zxing.client.result.ParsedResult;
 import com.google.zxing.client.result.URIParsedResult;
 
-public final class URIResultHandler extends ResultHandler {
+import android.app.Activity;
 
-  private static final int[] mButtons = {
+/**
+ * Offers appropriate actions for URLS.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class URIResultHandler extends ResultHandler {
+  private static final int[] buttons = {
       R.string.button_open_browser,
       R.string.button_share_by_email,
       R.string.button_share_by_sms
@@ -35,17 +40,17 @@ public final class URIResultHandler extends ResultHandler {
 
   @Override
   public int getButtonCount() {
-    return mButtons.length;
+    return buttons.length;
   }
 
   @Override
   public int getButtonText(int index) {
-    return mButtons[index];
+    return buttons[index];
   }
 
   @Override
   public void handleButtonPress(int index) {
-    URIParsedResult uriResult = (URIParsedResult) mResult;
+    URIParsedResult uriResult = (URIParsedResult) result;
     switch (index) {
       case 0:
         openURL(uriResult.getURI());
@@ -63,5 +68,4 @@ public final class URIResultHandler extends ResultHandler {
   public int getDisplayTitle() {
     return R.string.result_uri;
   }
-
 }