java - Java android 应用程序无法使用套接字连接相机的蓝牙快门/VR 遥控器

Question

我正在尝试制作一个能够读取蓝牙远程信号的应用程序，无论它发送什么数据。我只有一个便宜的 VR 遥控器和一个快门遥控器。
配对后我可以得到他们的mac地址和UUID。

与蓝牙套接字连接的部分不断崩溃。有一个更好的方法吗？

public class SettingsActivity extends AppCompatActivity {

Button b1,b2,b3,b4;
private BluetoothAdapter BA;
private Set<BluetoothDevice>pairedDevices;
ListView lv;
ListView uuidlist;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_settings);
    Intent i = getIntent();
    String message = i.getStringExtra("Info");
    ((TextView)findViewById(R.id.textView)).setText(message);


    b1 =(Button)findViewById(R.id.button_on);
    b2=(Button)findViewById(R.id.button_off);
    b3=(Button)findViewById(R.id.list_devices);
    b4=(Button)findViewById(R.id.visible);

    BA = BluetoothAdapter.getDefaultAdapter();
    lv = (ListView)findViewById(R.id.listView);
    uuidlist = (ListView)findViewById(R.id.listView);

    String uuid = get_uuid_from_paired_devices();

    ((TextView)findViewById(R.id.uuid)).setText(uuid);
    final UUID mUUID = UUID.fromString(uuid);
    String mac = get_mac_from_paired_devices();
    mac = mac.replaceAll("[\\[\\](){}]","");
    ((TextView)findViewById(R.id.mac)).setText(mac);


    //BluetoothDevice remote = BA.getRemoteDevice(mac);
    BluetoothDevice remote;
    BluetoothServerSocket mmServerSocket;

    BluetoothSocket socket = null;

    try  {
        mmServerSocket = BA.listenUsingRfcommWithServiceRecord("remote", mUUID);
        socket = mmServerSocket.accept();


    }  catch (Exception e) {

    }

    **////////// stuck here with the bluetooth socket**


}

public void on(View v){
    if (!BA.isEnabled()) {
        Intent turnOn = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(turnOn, 1);
        Toast.makeText(getApplicationContext(), "Turned on",Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(getApplicationContext(), "Already on", Toast.LENGTH_LONG).show();
    }
}

public void off(View v){
    BA.disable();
    Toast.makeText(getApplicationContext(), "Turned off" ,Toast.LENGTH_LONG).show();
}


public  void visible(View v){
    Intent getVisible = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    startActivityForResult(getVisible, 1);
}


public void list(View v){
    pairedDevices = BA.getBondedDevices();

    ArrayList list = new ArrayList();

    for(BluetoothDevice bt : pairedDevices) list.add(bt.getName());
    Toast.makeText(getApplicationContext(), "Showing Paired Devices",Toast.LENGTH_SHORT).show();

    final ArrayAdapter adapter = new  ArrayAdapter(this,android.R.layout.simple_list_item_1, list);

    lv.setAdapter(adapter);


}

public void unpair(View v) {
    Set<BluetoothDevice> bondedDevices = BA.getBondedDevices();
    try {
        Class<?> btDeviceInstance =  Class.forName(BluetoothDevice.class.getCanonicalName());
        Method removeBondMethod = btDeviceInstance.getMethod("removeBond");

        boolean cleared = false;
        for (BluetoothDevice bluetoothDevice : bondedDevices) {
            String mac = bluetoothDevice.getAddress();

            removeBondMethod.invoke(bluetoothDevice);

            Toast.makeText(this, "Cleared Pairing", Toast.LENGTH_LONG ).show();
            cleared = true;
            break;

        }

        if(!cleared) {
            Toast.makeText(this,"Not paired", Toast.LENGTH_LONG ).show();
        }
    } catch (Throwable th) {
        Toast.makeText(this,"Error pairing", Toast.LENGTH_LONG ).show();
    }
}

private String get_uuid_from_paired_devices(){  //Get the list UUIDs
    Set<BluetoothDevice> pairedDevices = BA.getBondedDevices();
    String uuid_string = "";
    for (BluetoothDevice device: pairedDevices){

        for (ParcelUuid uuid: device.getUuids()){
            uuid_string = uuid.toString();

        }
    }

    return uuid_string;
}