二維碼簡(jiǎn)化

macgg · 發(fā)表于 2013-8-28 16:27

92Xml代碼

Xml代碼

Java代碼

Java代碼

Java代碼

Java代碼

Java代碼

Java代碼

Java代碼

public class CaptureActivity extends Activity implements Callback {       private CaptureActivityHandler handler;    private ViewfinderView viewfinderView;    private boolean hasSurface;    private Vector<BarcodeFormat> decodeFormats;    private String characterSet;    private TextView txtResult;    private InactivityTimer inactivityTimer;    private MediaPlayer mediaPlayer;    private boolean playBeep;    private static final float BEEP_VOLUME = 0.10f;    private boolean vibrate;       /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.main);       //初始化 CameraManager       CameraManager.init(getApplication());          viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);       txtResult = (TextView) findViewById(R.id.txtResult);       hasSurface = false;       inactivityTimer = new InactivityTimer(this);    }       @Override    protected void onResume() {       super.onResume();       SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);       SurfaceHolder surfaceHolder = surfaceView.getHolder();       if (hasSurface) {             initCamera(surfaceHolder);       } else {             surfaceHolder.addCallback(this);             surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);       }       decodeFormats = null;       characterSet = null;          playBeep = true;       AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);       if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {             playBeep = false;       }       initBeepSound();       vibrate = true;    }       @Override    protected void onPause() {       super.onPause();       if (handler != null) {             handler.quitSynchronously();             handler = null;       }       CameraManager.get().closeDriver();    }       @Override    protected void onDestroy() {       inactivityTimer.shutdown();       super.onDestroy();    }       private void initCamera(SurfaceHolder surfaceHolder) {       try {             CameraManager.get().openDriver(surfaceHolder);       } catch (IOException ioe) {             return;       } catch (RuntimeException e) {             return;       }       if (handler == null) {             handler = new CaptureActivityHandler(this, decodeFormats,                   characterSet);       }    }       @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width,             int height) {       }       @Override    public void surfaceCreated(SurfaceHolder holder) {       if (!hasSurface) {             hasSurface = true;             initCamera(holder);       }       }       @Override    public void surfaceDestroyed(SurfaceHolder holder) {       hasSurface = false;       }       public ViewfinderView getViewfinderView() {       return viewfinderView;    }       public Handler getHandler() {       return handler;    }       public void drawViewfinder() {       viewfinderView.drawViewfinder();       }       public void handleDecode(Result obj, Bitmap barcode) {       inactivityTimer.onActivity();       viewfinderView.drawResultBitmap(barcode);          playBeepSoundAndVibrate();       txtResult.setText(obj.getBarcodeFormat().toString() + ":"                + obj.getText());    }       private void initBeepSound() {       if (playBeep && mediaPlayer == null) {             // The volume on STREAM_SYSTEM is not adjustable, and users found it             // too loud,             // so we now play on the music stream.             setVolumeControlStream(AudioManager.STREAM_MUSIC);             mediaPlayer = new MediaPlayer();             mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);             mediaPlayer.setOnCompletionListener(beepListener);             AssetFileDescriptor file = getResources().openRawResourceFd(                   R.raw.beep);             try {                mediaPlayer.setDataSource(file.getFileDescriptor(),                         file.getStartOffset(), file.getLength());                file.close();                mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);                mediaPlayer.prepare();             } catch (IOException e) {                mediaPlayer = null;             }       }    }       private static final long VIBRATE_DURATION = 200L;       private void playBeepSoundAndVibrate() {       if (playBeep && mediaPlayer != null) {             mediaPlayer.start();       }       if (vibrate) {             Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);             vibrator.vibrate(VIBRATE_DURATION);       }    }       /**    * When the beep has finished playing, rewind to queue up another one.    */    private final OnCompletionListener beepListener = new OnCompletionListener() {       public void onCompletion(MediaPlayer mediaPlayer) {             mediaPlayer.seekTo(0);       }    };

簡(jiǎn)化過(guò)的包結(jié)構(gòu)圖：

　簡(jiǎn)化后的ZXing 更加方便我們了解ZXing項(xiàng)目是如何解碼的。只要仔細(xì)查看源碼，進(jìn)行單點(diǎn)跟蹤調(diào)試，相信大家很容易能理解。

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二維碼簡(jiǎn)化

二維碼簡(jiǎn)化

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