无需用户输入引脚即可以编程方式配对蓝牙设备

Question

我尝试连接的蓝牙设备始终具有相同的密码.这样可以通过以编程方式设置引脚来配对器件.

在尝试搜索如何完成后,我最终得到了以下代码:

BluetoothDevice device = getDevice();

//To avoid the popup notification:
device.getClass().getMethod("setPairingConfirmation", boolean.class).invoke(device, true);
device.getClass().getMethod("cancelPairingUserInput", boolean.class).invoke(device, true);
byte[] pin = ByteBuffer.allocate(4).putInt(1234).array();
//int pinn = 1234;

//Entering pin programmatically:  
Method ms = device.getClass().getMethod("setPin", byte[].class);
//Method ms = device.getClass().getMethod("setPasskey", int.class);
ms.invoke(device, pin);

//Bonding the device:
Method mm = device.getClass().getMethod("createBond", (Class[]) null);
mm.invoke(device, (Object[]) null);

cancelPairingUserInput给了我一个NoSuchMethodException,这很奇怪,因为该方法确实存在于BluetoothDevice课堂上.

是看起来Setpin还是SetPasskey不会做任何事情.该设备不会配对.它只在手动输入引脚后成对.

所以唯一有效的代码行是:

//Bonding the device:
Method mm = device.getClass().getMethod("createBond", (Class[]) null);
mm.invoke(device, (Object[]) null);

Logcat输出:

09-27 12:34:46.408: ERROR/App(11671): cancelPairingUserInput [boolean]
        java.lang.NoSuchMethodException: cancelPairingUserInput [boolean]
        at java.lang.Class.getConstructorOrMethod(Class.java:460)
        at java.lang.Class.getMethod(Class.java:915)
        at test.app.bluetooth.model.BluetoothDiscoveryAndPairing.pair(BluetoothDiscoveryAndPairing.java:97)
        at test.app.bluetooth.model.BluetoothDiscoveryAndPairing.access$000(BluetoothDiscoveryAndPairing.java:25)
        at test.app.bluetooth.model.BluetoothDiscoveryAndPairing$1.onReceive(BluetoothDiscoveryAndPairing.java:79)
        at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:756)
        at android.os.Handler.handleCallback(Handler.java:615)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4921)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
        at dalvik.system.NativeStart.main(Native Method)

那么我做错了什么？

Answer 1

隐藏方法cancelPairingUserInput在您的设备中不存在.不要使用它.

1. 您应该为android.bluetooth.device.action.PAIRING_REQUEST注册BroadcastReceiver
2. 调用createBond()
3. 等待BroadcastReceiver触发
4. 在BroadcastReceiver中,如果action是android.bluetooth.device.action.PAIRING_REQUEST,则调用此方法

public void setBluetoothPairingPin(BluetoothDevice device)
{
    byte[] pinBytes = convertPinToBytes("0000");
    try {
          Log.d(TAG, "Try to set the PIN");
          Method m = device.getClass().getMethod("setPin", byte[].class);
          m.invoke(device, pinBytes);
          Log.d(TAG, "Success to add the PIN.");
          try {
                device.getClass().getMethod("setPairingConfirmation", boolean.class).invoke(device, true);
                Log.d(TAG, "Success to setPairingConfirmation.");
            } catch (Exception e) {
                // TODO Auto-generated catch block
                Log.e(TAG, e.getMessage());
                e.printStackTrace();
            } 
        } catch (Exception e) {
          Log.e(TAG, e.getMessage());
          e.printStackTrace();
        }
}

它也适用于Android的Jelly Bean版本(4.1.2)的设备.