public void quitSynchronously() {
state = State.DONE;
cameraManager.stopPreview();
Message quit = Message.obtain(decodeThread.getHandler(), Constants.ID_QUIT);
quit.sendToTarget();
try {
// Wait at most half a second; should be enough time, and onPause() will timeout quickly
decodeThread.join(500L);
} catch (InterruptedException e) {
// continue
}
// Be absolutely sure we don't send any queued up messages
removeMessages(Constants.ID_DECODE_SUCCESS);
removeMessages(Constants.ID_DECODE_FAILED);
}
public CaptureActivityHandler(CaptureActivity activity, CameraManager cameraManager) {
this.activity = activity;
decodeThread = new DecodeThread(activity);
decodeThread.start();
state = State.SUCCESS;
// Start ourselves capturing previews and decoding.
this.cameraManager = cameraManager;
cameraManager.startPreview();
restartPreviewAndDecode();
}
@Override
public void handleMessage(Message message) {
switch (message.what) {
case Constants.ID_RESTART_PREVIEW:
restartPreviewAndDecode();
break;
case Constants.ID_DECODE_SUCCESS:
state = State.SUCCESS;
activity.handleDecode((String) message.obj, message.getData());
break;
case Constants.ID_DECODE_FAILED:
// We're decoding as fast as possible, so when one decode fails, start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), Constants.ID_DECODE);
break;
}
}
private void restartPreviewAndDecode() {
if (state == State.SUCCESS) {
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), Constants.ID_DECODE);
}
}