使用蓝牙通信丢失数据

Question

你好，我想通过蓝牙将arduino的二进制文件发送到我的android应用。我已经写了一个可以成功建立通信并能够接收数据的应用程序。但是，在通信过程中缺少很多字节。奇怪的是，当我使用蓝牙终端应用程序时会收到每个字节。这表示通信正常，但我的应用程序未触发接收事件或类似事件。

我的代码：

private final Semaphore sem = new Semaphore(1, true);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        img = new ImageSaver("image2.jpg", this);

        bluetoothModule = new BluetoothSPP(this);
        if (!bluetoothModule.isBluetoothAvailable()) {
            output.append("Bluetooth is not available on this device");
        } else {
            bluetoothModule.enable();
            bluetoothModule.setupService();
            bluetoothModule.startService(BluetoothState.DEVICE_OTHER);

            bluetoothModule.setBluetoothConnectionListener(new BluetoothSPP.BluetoothConnectionListener() {
                public void onDeviceConnected(String name, String address) {
                    if(name.equals("bilderstutzen"))
                        output.append("Connected to bilderstutzen");
                }

                public void onDeviceDisconnected() {
                    output.append("Connection lost");
                }

                public void onDeviceConnectionFailed() {
                    output.append("Unable to connect");
                }
            });

            bluetoothModule.setOnDataReceivedListener(new BluetoothSPP.OnDataReceivedListener() {

                @Override
                public void onDataReceived(byte[] data, String message) {
                    try{
                        sem.acquire();
                        //Log.d("save image", String.valueOf(img.length));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    img.saveImage(data);

                    sem.release();
                }
            });
        }
    }


    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode == BluetoothState.REQUEST_CONNECT_DEVICE)
            if(resultCode == Activity.RESULT_OK) {
                if(data != null)
                    bluetoothModule.connect(data);
                Log.d("connecting", "works");
            }
        else if(requestCode == BluetoothState.REQUEST_ENABLE_BT) {
            if(resultCode == Activity.RESULT_OK) {
                bluetoothModule.setupService();
                //bluetoothModule.startService(BluetoothState.DEVICE_OTHER);
                //setup();
            } else {
                output.append("bluetooth not enabled");
                finish();
                // Do something if user doesn't choose any device (Pressed back)
            }
        }
    }

saveImage方法的简化版本：

public void saveImage(byte[] img){
    for(byte b : img){ //just prints out the received data. With around 2000KB of data Im Missing around 200bytes
            Log.d("save image", String.format("%02x", b));

    }
}

希望您能帮助我解决这个问题！