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) { } } } } }