Question

我正在尝试通过代码进行配对，它仅适用于普通设备。如果我使用蓝牙扫描仪它与它配对但设备不工作，直到我去Android设置并选择输入设备复选框。我怎么能通过代码来做到这一点？

谢谢。

以下是我的配对代码：

public static BluetoothSocket createL2CAPBluetoothSocket(String address, int psm){
    return createBluetoothSocket(TYPE_L2CAP, -1, false,false, address, psm);
}
// method for creating a bluetooth client socket
private static BluetoothSocket createBluetoothSocket(
        int type, int fd, boolean auth, boolean encrypt, String address, int port){
    try {
        Constructor<BluetoothSocket> constructor = BluetoothSocket.class.getDeclaredConstructor(
                int.class, int.class,boolean.class,boolean.class,String.class, int.class);
        constructor.setAccessible(true);
        BluetoothSocket clientSocket = (BluetoothSocket)
                constructor.newInstance(type,fd,auth,encrypt,address,port);
        return clientSocket;
    }catch (Exception e) { return null; }
}

private void doPair(final BluetoothDevice device, final int deviceTag) {
    try {
        Method method = device.getClass().getMethod("createBond",
                (Class[]) null);
        method.invoke(device, (Object[]) null);
    } catch (Exception e) {
        Log.e(LOG_TAG, "Cannot pair device", e);
    }

    BroadcastReceiver mReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();

            if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
                final int state = intent.getIntExtra(
                        BluetoothDevice.EXTRA_BOND_STATE,
                        BluetoothDevice.ERROR);
                final int prevState = intent.getIntExtra(
                        BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE,
                        BluetoothDevice.ERROR);

                if (state == BluetoothDevice.BOND_BONDED
                        && prevState == BluetoothDevice.BOND_BONDING) {
                    Log.d(LOG_TAG, "Paired with new device");
                    if (listener != null) {
                        listener.onBluetoothPairedDeviceChange(bluetoothAdapter
                                .getBondedDevices().iterator().next()
                                .getName(), deviceTag);
                    }
                    context.unregisterReceiver(this);
                } else if (state == BluetoothDevice.BOND_NONE
                        && prevState == BluetoothDevice.BOND_BONDING) {
                    Log.d(LOG_TAG, "Cannot pair with new device");
                    if (listener != null) {
                        listener.onBluetoothStatusChange(BluetoothHelper.IDLE_STATUS);
                    }
                    context.unregisterReceiver(this);
                }
            }
        }

    };

    IntentFilter intent = new IntentFilter(
            BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    context.registerReceiver(mReceiver, intent);
}

Answer 1

首先，如果是API 19之后的目标版本，您可以使用BluetoothDevice.createBond()直接配对设备而不使用反射。 以下方法仅适用于Android 6.0之前的设备！（6.0之后，系统会进行一些来电检查以避免外部应用调用这些方法）

 BluetoothAdapter.getDefaultAdapter().getProfileProxy(MainActivity.this, new BluetoothProfile.ServiceListener() {
     @Override
     public void onServiceConnected(int profile, BluetoothProfile proxy) {
          Class<?> clazz = null;
          try {
               clazz = Class.forName("android.bluetooth.BluetoothInputDevice");
               Object obj = clazz.cast(proxy);
               Method connectMethod = clazz.getDeclaredMethod("connect",BluetoothDevice.class);
               boolean resultCode = (boolean) connectMethod.invoke(obj,device);
               Method setPriority = clazz.getDeclaredMethod("setPriority",BluetoothDevice.class,int.class);
               setPriority.invoke(obj,device,1000);
          } catch (ClassNotFoundException e) {
               e.printStackTrace();
          } catch (NoSuchMethodException e) {
               e.printStackTrace();
          } catch (InvocationTargetException e) {
               e.printStackTrace();
          } catch (IllegalAccessException e) {
               e.printStackTrace();
          }
     }

     @Override
     public void onServiceDisconnected(int profile) {
             Log.d("wtf","onservice disconnected "+profile);
     }
},INPUT_DEVICE);

final int INPUT_DEVICE = 4; // this is hidden memeber in BluetoothDevice

Android蓝牙配对输入设备

1 个答案: