Zxing二維碼掃描

掃描重點在這個類

public class CaptureActivity extends Activity implements Callback {

   private CaptureActivityHandler handler;
   private ViewfinderView viewfinderView;
   private boolean hasSurface;
   private Vector<BarcodeFormat> decodeFormats;
   private String characterSet;
   private InactivityTimer inactivityTimer;
   private MediaPlayer mediaPlayer;
   private boolean playBeep;
   private static final float BEEP_VOLUME = 0.10f;
   private boolean vibrate;
   private ImageView cancelScanButton;
   private Button btn_light_control;
   private boolean isShow=false;

   private ProgressBar pg;
   private ImageView iv_pg_bg_grey;
   private ImageView iv_big_circle;
   private ImageView iv_four_corner;
   private Button mBack;


   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.camera_diy);
      pg = (ProgressBar) findViewById(R.id.pg_camera_diy);
      iv_pg_bg_grey = (ImageView) findViewById(R.id.iv_camera_diy);
      iv_big_circle = (ImageView) findViewById(R.id.iv_camera_diy_circle);
      iv_four_corner = (ImageView) findViewById(R.id.iv_camera_diy_corner);
      //ViewUtil.addTopView(getApplicationContext(), this, R.string.scan_card);
      CameraManager.init(getApplication());
      viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
      cancelScanButton = (ImageView) this.findViewById(R.id.btn_cancel_scan);
      btn_light_control = (Button) this.findViewById(R.id.btn_light_control);
      mBack = (Button) this.findViewById(R.id.btn_left);

      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;

      //quit the scan view
      cancelScanButton.setOnClickListener(new OnClickListener() {

         @Override
         public void onClick(View v) {
            CaptureActivity.this.finish();
         }
      });
      btn_light_control.setOnClickListener(new OnClickListener() {

         @Override
         public void onClick(View v) {
            LightControl mLightControl = new LightControl();

            if(isShow){
               isShow = false;
               btn_light_control.setBackgroundResource(R.mipmap.torch_off);
               Toast.makeText(getApplicationContext(), "閃光燈關閉", Toast.LENGTH_LONG).show();
               mLightControl.turnOff();
            }else{
               isShow = true;
               btn_light_control.setBackgroundResource(R.mipmap.torch_on);
               mLightControl.turnOn();
               Toast.makeText(getApplicationContext(), "閃光燈開啓", Toast.LENGTH_LONG).show();
            }


         }
      });

      mBack.setOnClickListener(new OnClickListener() {
         @Override
         public void onClick(View v) {
            finish();
         }
      });

   }

   @Override
   protected void onPause() {
      super.onPause();
      if (handler != null) {
         handler.quitSynchronously();
         handler = null;
      }
      CameraManager.get().closeDriver();
   }

   @Override
   protected void onDestroy() {
      inactivityTimer.shutdown();
      super.onDestroy();
   }

   /**
    * Handler scan result
    * @param result
    * @param barcode
    */
   public void handleDecode(Result result, Bitmap barcode) {
//掃描出結果在這個類
      inactivityTimer.onActivity();
      playBeepSoundAndVibrate();
      String resultString = result.getText();
      //FIXME
      if (resultString.equals("")) {
         Toast.makeText(CaptureActivity.this, "Scan failed!", Toast.LENGTH_SHORT).show();
      }else {
//       System.out.println("Result:"+resultString);
         if(pg!=null&&pg.isShown()){
            pg.setVisibility(View.GONE);
            iv_pg_bg_grey.setVisibility(View.VISIBLE);
            iv_big_circle.setBackgroundResource(R.mipmap.bar_code_center_grey);
            iv_four_corner.setBackgroundResource(R.mipmap.bar_code_four_corner_grey);
         }
//掃描出result字符串 跳轉到List_ZxingActivity.class頁面。
         Intent resultIntent = new Intent(CaptureActivity.this, List_ZxingActivity.class);
         resultIntent.putExtra("result",""+resultString);
         startActivity(resultIntent);
      }
      CaptureActivity.this.finish();
   }

   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();

   }

   private void initBeepSound() {
      if (playBeep && mediaPlayer == null) {
         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);
      }
   };
}