public void quitSynchronously() {
state = State.DONE;
cameraManager.stopPreview();
Message quit = Message.obtain(decodeThread.getHandler(), DecodeStatus.QUIT);
quit.sendToTarget();
try {
// Wait at most half a second; should be enough time, and onPause()
// will connectTimeout quickly
decodeThread.join(500L);
} catch (InterruptedException e) {
// continue
}
// Be absolutely sure we don't send any queued up messages
removeMessages(DecodeStatus.DECODE_SUCCEEDED);
removeMessages(DecodeStatus.DECODE_FAILED);
}
public CaptureActivityHandler(
CaptureActivity activity, CameraManager cameraManager, int decodeMode) {
this.activity = activity;
decodeThread = new DecodeThread(activity, decodeMode);
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 DecodeStatus.RESTART_PREVIEW:
restartPreviewAndDecode();
break;
case DecodeStatus.DECODE_SUCCEEDED:
state = State.SUCCESS;
Bundle bundle = message.getData();
activity.handleDecode((Result) message.obj, bundle);
break;
case DecodeStatus.DECODE_FAILED:
// We're decoding as fast as possible, so when one decode fails,
// start another.
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), DecodeStatus.DECODE);
break;
case DecodeStatus.RETURN_SCAN_RESULT:
activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
activity.finish();
break;
}
}
private void restartPreviewAndDecode() {
if (state == State.SUCCESS) {
state = State.PREVIEW;
cameraManager.requestPreviewFrame(decodeThread.getHandler(), DecodeStatus.DECODE);
}
}