Android开发实现模仿360二维码扫描功能实例详解

/**
 * 二维码扫描
 * @Project  App_ZXing
 * @Package  com.android.scan
 * @author   chenlin
 * @version  1.0
 * @Date    2014年3月6日
 */
public class MainActivity extends Activity {
  private Button mBtnScan;
  private Button mBtnBack;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mBtnBack = (Button) findViewById(R.id.btn_back);
    mBtnBack.setVisibility(View.GONE);
    mBtnScan = (Button) findViewById(R.id.btn_scan);
    mBtnScan.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        startActivity(new Intent(MainActivity.this, ScanActivity.class));
      }
    });
  }
}

/**
 * 条形码扫描
 *
 * @Project App_ZXing
 * @Package com.android.scan
 * @author chenlin
 * @version 1.0
 * @Date 2014年3月6日
 */
public class ScanActivity extends Activity implements Callback {
  private static final float BEEP_VOLUME = 0.10f;
  protected static final String RESULT_TEXT = "result";
  protected static final String RESULT_BITMAP = "bitmap";
  /** 扫描界面 */
  private SurfaceView mSurfaceView;
  /** 自定义的View，就是我们看见的拍摄时中间的框框了 */
  private ViewfinderView mFindView;
  /** 解码处理类，负责调用另外的线程进行解码。 */
  private CaptureActivityHandler mHandler;
  /** 判断是否创建了SurfaceView */
  private boolean hasSurface;
  /** decodeFormats 条形码，二维码等的集合 */
  private Vector mDecodeFormats;
  /** 字符编码 */
  private String characterSet;
  /** 定时器 */
  private InactivityTimer inactivityTimer;
  /** 媒体播放器 */
  private MediaPlayer mediaPlayer;
  /** 是否播放声音 */
  private boolean playBeep;
  /** 是否震动 */
  private boolean vibrate;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan);
    init();
  }
  /**
   * 初始化
   */
  private void init() {
    mSurfaceView = (SurfaceView) findViewById(R.id.preview_view);
    mFindView = (ViewfinderView) findViewById(R.id.viewfinder_view);
    CameraManager.init(getApplication());
    hasSurface = false;
    inactivityTimer = new InactivityTimer(this);
  }
  /**
   * 暂停后恢复时处理内容
   */
  @SuppressWarnings("all")
  @Override
  protected void onResume() {
    super.onResume();
    // 先重新获得holder
    SurfaceHolder surfaceHolder = mSurfaceView.getHolder();
    if (hasSurface) {
      initCamera(surfaceHolder);
    } else {
      surfaceHolder.addCallback(this);
      surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }
    mDecodeFormats = null;
    characterSet = null;
    playBeep = true;
    AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
    // 如果当前是铃音模式，则继续准备下面的 蜂鸣提示音操作，如果是静音或者震动模式。就不要继续了。因为用户选择了无声的模式，我们就也不要出声了。
    if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
      playBeep = false;
    }
    // 初始化播放声音
    initBeepSound();
    //播放
    vibrate = true;
  }
  @Override
  protected void onPause() {
    super.onPause();
    if (mHandler != null) {
      mHandler.quitSynchronously();
      mHandler = null;
    }
    // 关闭摄像头信息
    CameraManager.get().closeDriver();
  }
  @Override
  protected void onDestroy() {
    // 关闭定时器
    inactivityTimer.shutdown();
    super.onDestroy();
  }
  /**
   * 处理扫描结果
   *
   * @param result
   * @param barcode
   */
  public void handleDecode(Result result, Bitmap barcode) {
    // 添加定时器
    inactivityTimer.onActivity();
    // 响铃和震动
    playBeepSoundAndVibrate();
    String resultString = result.getText();
    if (TextUtils.isEmpty(resultString)) {
      ToastUtil.show(this, "扫描失败");
      ScanActivity.this.finish();
    } else {
      //扫描完成后传递结果
      Intent resultIntent = new Intent();
      resultIntent.setClass(ScanActivity.this, ScanResultActivity.class);
      resultIntent.putExtra(RESULT_TEXT, resultString);
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      barcode.compress(Bitmap.CompressFormat.PNG, 100, baos);
      byte[] bitmapByte = baos.toByteArray();
      resultIntent.putExtra(RESULT_BITMAP, bitmapByte);
      startActivity(resultIntent);
      overridePendingTransition(R.anim.activity_in_from_rigth, R.anim.activity_out_to_scale);
      ScanActivity.this.finish();
    }
  }
  private void initCamera(SurfaceHolder surfaceHolder) {
    try {
      CameraManager.get().openDriver(surfaceHolder);
    } catch (IOException ioe) {
      return;
    } catch (RuntimeException e) {
      return;
    }
    if (mHandler == null) {
      mHandler = new CaptureActivityHandler(this, mDecodeFormats, characterSet);
    }
  }
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
  }
  /**
   * 在视图创建的时候初始化摄像头
   */
  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    if (!hasSurface) {
      hasSurface = true;
      initCamera(holder);
    }
  }
  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    hasSurface = false;
  }
  public ViewfinderView getViewfinderView() {
    return mFindView;
  }
  public Handler getHandler() {
    return mHandler;
  }
  public void drawViewfinder() {
    mFindView.drawViewfinder();
  }
  /**
   * 初始化声音资源
   */
  private void initBeepSound() {
    // 如果要播放声音并且没有播放器时
    if (playBeep && mediaPlayer == null) {
      // 设置声道流格式为音乐
      setVolumeControlStream(AudioManager.STREAM_MUSIC);
      mediaPlayer = new MediaPlayer();
      mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
      // 设置声音完成后监听
      mediaPlayer.setOnCompletionListener(beepListener);
      // 设定数据源，并准备播放
      AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep);
      try {
        mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength());
        file.close();
        mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);// 设置音量
        mediaPlayer.prepare();
      } catch (IOException e) {
        mediaPlayer = null;
      }
    }
  }
  private static final long VIBRATE_DURATION = 200L;
  /**
   * 响铃和震动
   */
  private void playBeepSoundAndVibrate() {
    if (playBeep && mediaPlayer != null) {
      mediaPlayer.start();
    }
    if (vibrate) {
      Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
      // 震动一次
      vibrator.vibrate(VIBRATE_DURATION);
      // 第一个参数，指代一个震动的频率数组。每两个为一组，每组的第一个为等待时间，第二个为震动时间。
      // 比如 [2000,500,100,400],会先等待2000毫秒，震动500，再等待100，震动400
      // 第二个参数，repest指代从 第几个索引（第一个数组参数） 的位置开始循环震动。
      // 会一直保持循环，我们需要用 vibrator.cancel()主动终止
      // vibrator.vibrate(new long[]{300,500},0);
    }
  }
  /**
   * 注册事件。当播放完毕一次后，重新指向流文件的开头，以准备下次播放。
   */
  private final MediaPlayer.OnCompletionListener beepListener = new MediaPlayer.OnCompletionListener() {
    public void onCompletion(MediaPlayer mediaPlayer) {
      mediaPlayer.seekTo(0);
    }
  };
}

/**
 *
 * @Project App_ZXing
 * @Package com.android.scan
 * @author chenlin
 * @version 1.0
 * @Date 2014年3月6日
 * @Note TODO
 */
public class ScanResultActivity extends Activity {
  private EditText mEtScan;
  private Button mBtnBack;
  private Button mBtnCopy;
  private ImageView mImageView;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan_result);
    initViews();
    init();
  }
  private void init() {
    final String result = getIntent().getStringExtra(ScanActivity.RESULT_TEXT);
    mEtScan.setText(result);
    final ClipboardManager cm = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
    mBtnBack.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        ScanResultActivity.this.finish();
      }
    });
    mBtnCopy.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        if (result!=null) {
          ClipData myClip = ClipData.newPlainText("text", result);
          cm.setPrimaryClip(myClip);
        }
      }
    });
    //设置图片信息
    byte[] imgByte = getIntent().getByteArrayExtra(ScanActivity.RESULT_BITMAP);
    if (imgByte != null) {
      Drawable drawable = BitmapUtil.byte2Drawable(imgByte);
      if (drawable != null) {
        mImageView.setImageDrawable(drawable);
      }
    }
  }
  // public void paste(View view){
  // ClipData abc = myClipboard.getPrimaryClip();
  // ClipData.Item item = abc.getItemAt(0);
  // String text = item.getText().toString();
  // pasteField.setText(text);
  // Toast.makeText(getApplicationContext(), "Text Pasted",
  // Toast.LENGTH_SHORT).show();
  // }
  private void initViews() {
    mEtScan = (EditText) findViewById(R.id.et_scan_result);
    mBtnBack = (Button) findViewById(R.id.btn_back);
    mBtnCopy = (Button) findViewById(R.id.btn_copy);
  }
}