Android Bluetooth Discovery 采用顺序方法吗？

Question

我是 Android 编程的新手。我想制作一个包含蓝牙发现功能的库(一个 JAR 文件)。
既然是库，里面的方法应该是顺序方法(启动蓝牙发现，等待一段时间，返回结果)。
我在下面做了一个代码，但它不起作用。在 LogCat 中，我可以看到 Intent ，但 BroadcastReceiver 无法捕捉到 Intent 。
代码有问题吗？

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Get local Bluetooth adapter
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    mSendButton = (Button) findViewById(R.id.button1);
    mSendButton.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            doDiscovery();
        }
    });
}

private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();

        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            // Get the BluetoothDevice object from the Intent
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            Log.e("device_name", device.getName());
            Log.e("device_add", device.getAddress());
            numberOfDevice++;
            Found_Device = true;
        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            if(numberOfDevice == 0){
                Log.e("DISCOVERY", "No Device found");
            }
            Log.e("DISCOVERY", "Number of device :" + numberOfDevice);
            Discovery_Finish = true;
        }
    }
};

public void doDiscovery(){
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    registerReceiver(mReceiver, filter);

    Discovery_Finish = false;
    Found_Device = false;
    long counter = 0;

    if (mBluetoothAdapter.isDiscovering()) {
        mBluetoothAdapter.cancelDiscovery();
    }
    mBluetoothAdapter.startDiscovery();
    while((Found_Device == false) || (Discovery_Finish == false)){
        counter++;
        if (counter >= 1000000){
            break;
        }
    }
    // Add a code to check the number of device

    unregisterReceiver(mReceiver);
    mBluetoothAdapter.cancelDiscovery();
}

有什么方法可以不使用 BroadcastReceiver 来检查 Intent 吗？
感谢您的帮助。

Answer 1

我认为您无法开始发现其他设备。