通过反射调用Android的L2CAP接口

目前的Android蓝牙接口里，通过BluetoothDevice，我们只能调用到RFCOMM和SCO。

更底层的L2CAP接口并没有显式的提供出来。

 

其实通过java的反射机制，我们也是是可以调用到L2CAP接口的。

 import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import android.bluetooth.BluetoothSocket;

 public class BluetoothSocketFactory
 {
     public static final int TYPE_RFCOMM = 1;
     public static final int TYPE_SCO = 2;
     public static final int TYPE_L2CAP = 3;

     // address must use upper case
     public static final BluetoothSocket createBluetoothSocket(int type, int fd,
             boolean auth, boolean encrypt, String address, int port)
             throws IOException
     {
         BluetoothSocket socket = null;
         try
         {
             Constructor<BluetoothSocket> cs = BluetoothSocket.class
                     .getDeclaredConstructor(int.class, int.class,
                             boolean.class, boolean.class, String.class,
                             int.class);
             if (!cs.isAccessible())
             {
                 cs.setAccessible(true);
             }
             socket = cs.newInstance(type, fd, auth, encrypt, address, port);
         }
         catch (SecurityException e)
         {
         }
         catch (NoSuchMethodException e)
         {
         }
         catch (IllegalArgumentException e)
         {
         }
         catch (InstantiationException e)
         {
         }
         catch (IllegalAccessException e)
         {
         }
         catch (InvocationTargetException e)
         {
         }
         return socket;
     }

     public static void main(String args[])
     {
         BluetoothSocket socket = null;
         try
         {
             socket = BluetoothSocketFactory.createBluetoothSocket(
                     BluetoothSocketFactory.TYPE_L2CAP, -1, false, false,
                     "00:0B:24:35:4E:86", 22135);
             socket.connect();
         }
         catch (IOException e)
         {
         }
         finally
         {
             if (null != socket)
             {
                 try
                 {
                     socket.close();
                 }
                 catch (IOException e)
                 {
                 }
             }
         }
     }
 }