Java 无需用户输入密码即可以编程方式配对蓝牙设备

Programmatically pair Bluetooth device without the user entering pin

提问by user1816451

The Bluetooth device I am trying to connect has always the same pincode. This should make it possible to pair the device by setting the pin programmatically.

我尝试连接的蓝牙设备始终具有相同的密码。这应该可以通过以编程方式设置引脚来配对设备。

After trying to search how this could be done, I ended up with the code below:

在尝试搜索如何做到这一点后，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);

cancelPairingUserInputgives me a NoSuchMethodException, which is weird because the method does exist in BluetoothDeviceclass.

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

Is looks like Setpinor SetPasskeydoesn't do anything. The device just wont pair. It only pairs after manually entering the pin.

看起来像Setpin或SetPasskey不做任何事情。该设备无法配对。它仅在手动输入引脚后配对。

So the only line of code that works is:

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 output:

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
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();
        }
}
0(BluetoothDiscoveryAndPairing.java:25)
        at test.app.bluetooth.model.BluetoothDiscoveryAndPairing.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)

So what am I doing wrong?

那么我做错了什么？

回答by KRiadh

The hidden method cancelPairingUserInput does not exist in your device. Don't use it.

您的设备中不存在隐藏方法 cancelPairingUserInput。不要使用它。

1. You should register BroadcastReceiver for android.bluetooth.device.action.PAIRING_REQUEST
2. Call createBond()
3. Wait for BroadcastReceiver to trigger
4. In BroadcastReceiver if action is android.bluetooth.device.action.PAIRING_REQUEST call this method

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 如果动作是 android.bluetooth.device.action.PAIRING_REQUEST 调用这个方法

    IntentFilter filter2 = new IntentFilter(
            "android.bluetooth.device.action.PAIRING_REQUEST");
    mActivity.registerReceiver(
            pairingRequest, filter2);

private final BroadcastReceiver pairingRequest = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {

        if (intent.getAction().equals("android.bluetooth.device.action.PAIRING_REQUEST")) {
            mBluetoothDevice = needed;
                try {
                    byte[] pin = (byte[]) BluetoothDevice.class.getMethod("convertPinToBytes", String.class).invoke(BluetoothDevice.class, "1234");
                    Method m = mBluetoothDevice.getClass().getMethod("setPin", byte[].class);
                    m.invoke(mBluetoothDevice, pin);
                    mBluetoothDevice.getClass().getMethod("setPairingConfirmation", boolean.class).invoke(mBluetoothDevice, true);
}
    catch(Exception e)
{

    e.printStackTrace();

}

It also works on a device with Jelly Bean version (4.1.2) of Android.

它也适用于装有 Jelly Bean 版本 (4.1.2) 的 Android 设备。

回答by Péter Hidvégi

this is works for me:

这对我有用：

##代码##