@Override public void handleMessage(Message msg) { switch (msg.what) { case R.id.decoded: String data = msg.getData().getString(DECODED_DATA); Toast.makeText(context, data, Toast.LENGTH_LONG).show(); if (callback != null) { callback.onDecoded(data); } break; case R.id.decode_failed: // getting new frame cameraManager.requestNextFrame(new PreviewCallback(this, cameraManager)); break; } }