Did a bunch of renaming, there was no need for the Barcodes prefix.

git-svn-id: https://zxing.googlecode.com/svn/trunk@682 59b500cc-1b3d-0410-9834-0bbf25fbcc57

android/AndroidManifest.xml

@@ -24,7 +24,7 @@ versionName is 2.31, 2.4, or 3.0. -->
           android:versionCode="6">
   <application android:icon="@drawable/launcher_icon"
                android:label="@string/app_name">
-    <activity android:name=".BarcodesCaptureActivity"
+    <activity android:name=".CaptureActivity"
               android:screenOrientation="landscape"
               android:configChanges="orientation|keyboardHidden"
               android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
@@ -42,10 +42,10 @@ versionName is 2.31, 2.4, or 3.0. -->
         <category android:name="android.intent.category.DEFAULT"/>
       </intent-filter>
     </activity>
-    <activity android:name="BarcodesPreferenceActivity"
+    <activity android:name="PreferencesActivity"
               android:label="@string/preferences_name">
     </activity>
-    <activity android:name="BarcodesEncodeActivity">
+    <activity android:name="EncodeActivity">
       <intent-filter>
         <action android:name="com.google.zxing.client.android.ENCODE"/>
         <category android:name="android.intent.category.DEFAULT"/>

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

@@ -0,0 +1,420 @@
+/*
+ * 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;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.res.AssetFileDescriptor;
+import android.content.res.Configuration;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.media.MediaPlayer.OnCompletionListener;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Message;
+import android.preference.PreferenceManager;
+import android.text.SpannableStringBuilder;
+import android.text.style.UnderlineSpan;
+import android.view.Gravity;
+import android.view.KeyEvent;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+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.
+ */
+public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {
+
+  private static final int SHARE_ID = Menu.FIRST;
+  private static final int SETTINGS_ID = Menu.FIRST + 1;
+  private static final int HELP_ID = Menu.FIRST + 2;
+  private static final int ABOUT_ID = Menu.FIRST + 3;
+
+  private static final int MAX_RESULT_IMAGE_SIZE = 150;
+  private static final int INTENT_RESULT_DURATION = 1500;
+  private static final float BEEP_VOLUME = 0.15f;
+
+  public CaptureActivityHandler mHandler;
+
+  private ViewfinderView mViewfinderView;
+  private View mStatusView;
+  private View mResultView;
+  private MediaPlayer mMediaPlayer;
+  private Result mLastResult;
+  private boolean mHasSurface;
+  private boolean mPlayBeep;
+  private boolean mScanIntent;
+  private String mDecodeMode;
+
+  @Override
+  public void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+
+    Window window = getWindow();
+    window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+    setContentView(R.layout.capture);
+
+    CameraManager.init(getApplication());
+    mViewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
+    mResultView = findViewById(R.id.result_view);
+    mStatusView = findViewById(R.id.status_view);
+    mHandler = null;
+    mLastResult = null;
+    mHasSurface = false;
+  }
+
+  @Override
+  protected void onResume() {
+    super.onResume();
+
+    SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
+    SurfaceHolder surfaceHolder = surfaceView.getHolder();
+    if (mHasSurface) {
+      // 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);
+    } else {
+      // Install the callback and wait for surfaceCreated() to init the camera.
+      surfaceHolder.addCallback(this);
+      surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
+    }
+
+    Intent intent = getIntent();
+    if (intent != null && (intent.getAction().equals(Intents.Scan.ACTION) ||
+        intent.getAction().equals(Intents.Scan.DEPRECATED_ACTION))) {
+      mScanIntent = true;
+      mDecodeMode = intent.getStringExtra(Intents.Scan.MODE);
+      resetStatusView();
+    } else {
+      mScanIntent = false;
+      mDecodeMode = null;
+      if (mLastResult == null) {
+        resetStatusView();
+      }
+    }
+
+    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+    mPlayBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true);
+    initBeepSound();
+  }
+
+  @Override
+  protected void onPause() {
+    super.onPause();
+    if (mHandler != null) {
+      mHandler.quitSynchronously();
+      mHandler = null;
+    }
+    CameraManager.get().closeDriver();
+  }
+
+  @Override
+  public boolean onKeyDown(int keyCode, KeyEvent event) {
+    if (keyCode == KeyEvent.KEYCODE_BACK) {
+      if (mScanIntent) {
+        setResult(RESULT_CANCELED);
+        finish();
+        return true;
+      } else if (mLastResult != null) {
+        resetStatusView();
+        mHandler.sendEmptyMessage(R.id.restart_preview);
+        return true;
+      }
+    } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
+      // Handle these events so they don't launch the Camera app
+      return true;
+    }
+    return super.onKeyDown(keyCode, event);
+  }
+
+  @Override
+  public boolean onCreateOptionsMenu(Menu menu) {
+    super.onCreateOptionsMenu(menu);
+    menu.add(0, SHARE_ID, 0, R.string.menu_share).setIcon(R.drawable.share_barcode);
+    menu.add(0, SETTINGS_ID, 0, R.string.menu_settings)
+        .setIcon(android.R.drawable.ic_menu_preferences);
+    menu.add(0, HELP_ID, 0, R.string.menu_help)
+        .setIcon(android.R.drawable.ic_menu_help);
+    menu.add(0, ABOUT_ID, 0, R.string.menu_about)
+        .setIcon(android.R.drawable.ic_menu_info_details);
+    return true;
+  }
+
+  @Override
+  public boolean onOptionsItemSelected(MenuItem item) {
+    switch (item.getItemId()) {
+      case SHARE_ID: {
+        Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setClassName(this, ShareActivity.class.getName());
+        startActivity(intent);
+        break;
+      }
+      case SETTINGS_ID: {
+        Intent intent = new Intent(Intent.ACTION_VIEW);
+        intent.setClassName(this, PreferencesActivity.class.getName());
+        startActivity(intent);
+        break;
+      }
+      case HELP_ID: {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.title_help);
+        builder.setMessage(R.string.msg_help);
+        builder.setPositiveButton(R.string.button_ok, null);
+        builder.show();
+        break;
+      }
+      case ABOUT_ID: {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setTitle(R.string.title_about);
+        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.setNegativeButton(R.string.button_cancel, null);
+        builder.show();
+        break;
+      }
+    }
+    return super.onOptionsItemSelected(item);
+  }
+
+  @Override
+  public void onConfigurationChanged(Configuration config) {
+    // Do nothing, this is to prevent the activity from being restarted when the keyboard opens.
+    super.onConfigurationChanged(config);
+  }
+
+  private final DialogInterface.OnClickListener mAboutListener = new DialogInterface.OnClickListener() {
+    public void onClick(android.content.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) {
+      mHasSurface = true;
+      initCamera(holder);
+    }
+  }
+
+  public void surfaceDestroyed(SurfaceHolder holder) {
+    mHasSurface = false;
+  }
+
+  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+
+  }
+
+  /**
+   * A valid barcode has been found, so give an indication of success and show the results.
+   *
+   * @param rawResult The contents of the barcode.
+   * @param barcode   A greyscale bitmap of the camera data which was decoded.
+   * @param duration  How long the decoding took in milliseconds.
+   */
+  public void handleDecode(Result rawResult, Bitmap barcode, int duration) {
+    mLastResult = rawResult;
+    playBeepSound();
+    drawResultPoints(barcode, rawResult);
+
+    if (mScanIntent) {
+      handleDecodeForScanIntent(rawResult, barcode, duration);
+    } else {
+      mStatusView.setVisibility(View.GONE);
+      mViewfinderView.setVisibility(View.GONE);
+      mResultView.setVisibility(View.VISIBLE);
+
+      ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view);
+      barcodeImageView.setMaxWidth(MAX_RESULT_IMAGE_SIZE);
+      barcodeImageView.setMaxHeight(MAX_RESULT_IMAGE_SIZE);
+      barcodeImageView.setImageBitmap(barcode);
+
+      TextView formatTextView = (TextView) findViewById(R.id.format_text_view);
+      formatTextView.setText(getString(R.string.msg_default_format) + ": " +
+          rawResult.getBarcodeFormat().toString());
+
+      ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
+      TextView typeTextView = (TextView) findViewById(R.id.type_text_view);
+      typeTextView.setText(getString(R.string.msg_default_type) + ": " +
+          resultHandler.getType().toString());
+
+      TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view);
+      CharSequence title = getString(resultHandler.getDisplayTitle());
+      SpannableStringBuilder styled = new SpannableStringBuilder(title + "\n\n");
+      styled.setSpan(new UnderlineSpan(), 0, title.length(), 0);
+      styled.append(resultHandler.getDisplayContents());
+      contentsTextView.setText(styled);
+
+      int buttonCount = resultHandler.getButtonCount();
+      ViewGroup buttonView = (ViewGroup) findViewById(R.id.result_button_view);
+      buttonView.requestFocus();
+      for (int x = 0; x < ResultHandler.MAX_BUTTON_COUNT; x++) {
+        Button button = (Button) buttonView.getChildAt(x);
+        if (x < buttonCount) {
+          button.setVisibility(View.VISIBLE);
+          button.setText(resultHandler.getButtonText(x));
+          button.setOnClickListener(new ResultButtonListener(resultHandler, x));
+        } else {
+          button.setVisibility(View.GONE);
+        }
+      }
+    }
+  }
+
+  /**
+   * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
+   *
+   * @param barcode   A bitmap of the captured image.
+   * @param rawResult The decoded results which contains the points to draw.
+   */
+  private void drawResultPoints(Bitmap barcode, Result rawResult) {
+    ResultPoint[] points = rawResult.getResultPoints();
+    if (points != null && points.length > 0) {
+      Canvas canvas = new Canvas(barcode);
+      Paint paint = new Paint();
+      paint.setColor(getResources().getColor(R.color.result_image_border));
+      paint.setStrokeWidth(3);
+      paint.setStyle(Paint.Style.STROKE);
+      Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
+      canvas.drawRect(border, paint);
+
+      paint.setColor(getResources().getColor(R.color.result_points));
+      if (points.length == 2) {
+        paint.setStrokeWidth(4);
+        canvas.drawLine(points[0].getX(), points[0].getY(), points[1].getX(),
+            points[1].getY(), paint);
+      } else {
+        paint.setStrokeWidth(10);
+        for (int x = 0; x < points.length; x++) {
+          canvas.drawPoint(points[x].getX(), points[x].getY(), paint);
+        }
+      }
+    }
+  }
+
+  private void handleDecodeForScanIntent(Result rawResult, Bitmap barcode, int duration) {
+    mViewfinderView.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
+    // have time to read.
+    ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
+    TextView textView = (TextView) findViewById(R.id.status_text_view);
+    textView.setGravity(Gravity.CENTER);
+    textView.setTextSize(18.0f);
+    textView.setText(getString(resultHandler.getDisplayTitle()));
+
+    mStatusView.setBackgroundColor(getResources().getColor(R.color.transparent));
+
+    // 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.obj = intent;
+    mHandler.sendMessageDelayed(message, INTENT_RESULT_DURATION);
+  }
+
+  /**
+   * Creates the beep MediaPlayer in advance so that the sound can be triggered with the least
+   * latency possible.
+   */
+  private void initBeepSound() {
+    if (mPlayBeep && mMediaPlayer == null) {
+      mMediaPlayer = new MediaPlayer();
+      mMediaPlayer.setAudioStreamType(AudioManager.STREAM_SYSTEM);
+      mMediaPlayer.setOnCompletionListener(mBeepListener);
+
+      AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
+      try {
+        mMediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(),
+            file.getLength());
+        file.close();
+        mMediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
+        mMediaPlayer.prepare();
+      } catch (IOException e) {
+        mMediaPlayer = null;
+      }
+    }
+  }
+
+  private void playBeepSound() {
+    if (mPlayBeep && mMediaPlayer != null) {
+      mMediaPlayer.start();
+    }
+  }
+
+  private void initCamera(SurfaceHolder surfaceHolder) {
+    CameraManager.get().openDriver(surfaceHolder);
+    if (mHandler == null) {
+      boolean beginScanning = mLastResult == null;
+      mHandler = new CaptureActivityHandler(this, mDecodeMode, beginScanning);
+    }
+  }
+
+  /**
+   * When the beep has finished playing, rewind to queue up another one.
+   */
+  private final OnCompletionListener mBeepListener = new OnCompletionListener() {
+    public void onCompletion(MediaPlayer mediaPlayer) {
+      mediaPlayer.seekTo(0);
+    }
+  };
+
+  private void resetStatusView() {
+    mResultView.setVisibility(View.GONE);
+    mStatusView.setVisibility(View.VISIBLE);
+    mStatusView.setBackgroundColor(getResources().getColor(R.color.status_view));
+    mViewfinderView.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;
+  }
+
+  public void drawViewfinder() {
+    mViewfinderView.drawViewfinder();
+  }
+
+}

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

@@ -0,0 +1,111 @@
+/*
+ * 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;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Bitmap;
+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.
+ */
+public class CaptureActivityHandler extends Handler {
+
+  private final CaptureActivity mActivity;
+  private final DecodeThread mDecodeThread;
+  private State mState;
+
+  private enum State {
+    PREVIEW,
+    SUCCESS,
+    DONE
+  }
+
+  CaptureActivityHandler(CaptureActivity activity, String decodeMode,
+                                 boolean beginScanning) {
+    mActivity = activity;
+    mDecodeThread = new DecodeThread(activity, decodeMode);
+    mDecodeThread.start();
+    mState = State.SUCCESS;
+
+    // Start ourselves capturing previews and decoding.
+    CameraManager.get().startPreview();
+    if (beginScanning) {
+      restartPreviewAndDecode();
+    }
+  }
+
+  public void handleMessage(Message message) {
+    switch (message.what) {
+      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) {
+          CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
+        }
+        break;
+      case R.id.restart_preview:
+        restartPreviewAndDecode();
+        break;
+      case R.id.decode_succeeded:
+        mState = State.SUCCESS;
+        Bundle bundle = message.getData();
+        Bitmap barcode = bundle.getParcelable(DecodeThread.BARCODE_BITMAP);
+        int duration = message.arg1;
+        mActivity.handleDecode((Result) message.obj, barcode, duration);
+        break;
+      case R.id.decode_failed:
+        // We're decoding as fast as possible, so when one decode fails, start another.
+        mState = State.PREVIEW;
+        CameraManager.get().requestPreviewFrame(mDecodeThread.mHandler, R.id.decode);
+        break;
+      case R.id.return_scan_result:
+        mActivity.setResult(Activity.RESULT_OK, (Intent) message.obj);
+        mActivity.finish();
+        break;
+    }
+  }
+
+  public void quitSynchronously() {
+    mState = State.DONE;
+    CameraManager.get().stopPreview();
+    Message quit = Message.obtain(mDecodeThread.mHandler, R.id.quit);
+    quit.sendToTarget();
+    try {
+      mDecodeThread.join();
+    } catch (InterruptedException e) {
+    }
+
+    // Be absolutely sure we don't send any queued up messages
+    removeMessages(R.id.decode_succeeded);
+    removeMessages(R.id.decode_failed);
+  }
+
+  private void restartPreviewAndDecode() {
+    if (mState == State.SUCCESS) {
+      mState = State.PREVIEW;
+      CameraManager.get().requestPreviewFrame(mDecodeThread.mHandler, R.id.decode);
+      CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
+      mActivity.drawViewfinder();
+    }
+  }
+
+}

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

@@ -40,18 +40,18 @@ final class DecodeThread extends Thread {
   public static final String BARCODE_BITMAP = "barcode_bitmap";
 
   public Handler mHandler;
-  private BarcodesCaptureActivity mActivity;
+  private CaptureActivity mActivity;
   private MultiFormatReader mMultiFormatReader;
 
-  DecodeThread(BarcodesCaptureActivity activity, String mode) {
+  DecodeThread(CaptureActivity activity, String mode) {
     mActivity = activity;
     mMultiFormatReader = new MultiFormatReader();
 
     // The prefs can't change while the thread is running, so pick them up once here.
     if (mode == null || mode.length() == 0) {
       SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
-      boolean decode1D = prefs.getBoolean(BarcodesPreferenceActivity.KEY_DECODE_1D, true);
-      boolean decodeQR = prefs.getBoolean(BarcodesPreferenceActivity.KEY_DECODE_QR, true);
+      boolean decode1D = prefs.getBoolean(PreferencesActivity.KEY_DECODE_1D, true);
+      boolean decodeQR = prefs.getBoolean(PreferencesActivity.KEY_DECODE_QR, true);
       if (decode1D && decodeQR) {
         setDecodeAllMode();
       } else if (decode1D) {

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

@@ -0,0 +1,139 @@
+/*
+ * 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;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnCancelListener;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.view.ViewTreeObserver.OnGlobalLayoutListener;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+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.
+ */
+public class EncodeActivity extends Activity {
+
+  private QRCodeEncoder mQRCodeEncoder;
+  private ProgressDialog mProgressDialog;
+  private boolean mFirstLayout;
+
+  @Override
+  public void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+
+    Intent intent = getIntent();
+    if (intent != null && (intent.getAction().equals(Intents.Encode.ACTION) ||
+        intent.getAction().equals(Intents.Encode.DEPRECATED_ACTION))) {
+      setContentView(R.layout.encode);
+    } else {
+      finish();
+    }
+  }
+
+  @Override
+  protected void onResume() {
+    super.onResume();
+
+    LinearLayout layout = (LinearLayout) findViewById(R.id.encode_view);
+    layout.getViewTreeObserver().addOnGlobalLayoutListener(mLayoutListener);
+    mFirstLayout = true;
+  }
+
+  /**
+   * This needs to be delayed until after the first layout so that the view dimensions will be
+   * available.
+   */
+  public OnGlobalLayoutListener mLayoutListener = new OnGlobalLayoutListener() {
+    public void onGlobalLayout() {
+      if (mFirstLayout) {
+        LinearLayout layout = (LinearLayout) 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 Handler mHandler = new Handler() {
+    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) {
+      mProgressDialog.dismiss();
+      mProgressDialog = null;
+    }
+    AlertDialog.Builder builder = new AlertDialog.Builder(this);
+    builder.setMessage(message);
+    builder.setPositiveButton(R.string.button_ok, mClickListener);
+    builder.show();
+  }
+
+  private OnClickListener mClickListener = new OnClickListener() {
+    public void onClick(DialogInterface dialog, int which) {
+      finish();
+    }
+  };
+
+  private OnCancelListener mCancelListener = new OnCancelListener() {
+    public void onCancel(DialogInterface dialog) {
+      finish();
+    }
+  };
+
+}

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

@@ -0,0 +1,59 @@
+/*
+ * 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;
+
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.os.Bundle;
+import android.preference.CheckBoxPreference;
+import android.preference.PreferenceScreen;
+
+public class PreferencesActivity extends android.preference.PreferenceActivity
+    implements OnSharedPreferenceChangeListener {
+
+  static final String KEY_DECODE_1D = "preferences_decode_1D";
+  static final String KEY_DECODE_QR = "preferences_decode_QR";
+  static final String KEY_PLAY_BEEP = "preferences_play_beep";
+
+  CheckBoxPreference mDecode1D;
+  CheckBoxPreference mDecodeQR;
+  CheckBoxPreference mPlayBeep;
+
+  @Override
+  protected void onCreate(Bundle icicle) {
+    super.onCreate(icicle);
+    addPreferencesFromResource(R.xml.preferences);
+
+    PreferenceScreen preferences = getPreferenceScreen();
+    preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
+    mDecode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
+    mDecodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
+    mPlayBeep = (CheckBoxPreference) preferences.findPreference(KEY_PLAY_BEEP);
+  }
+
+  // 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());
+      mDecodeQR.setChecked(true);
+    } else if (key.equals(KEY_DECODE_QR)) {
+      mDecode1D.setEnabled(mDecodeQR.isChecked());
+      mDecode1D.setChecked(true);
+    }
+  }
+
+}