用代码实现断开Android手机USB连接【转】

本文转载自：https://blog.csdn.net/phoebe_2012/article/details/47025309

用代码实现断开Android手机USB连接

       

        用代码 实现了一个小功能：断开android手机USB连接。

        

<span style="white-space:pre">    </span>// 尝试断开USB连接
    boolean disconnectUSB() {
        String state = "none";// 禁用所有usb
        //String state = "adb";// 仅使用adb
        //String state = "mtp,adb";// 使用mtp与adb
        SystemProperties.set("sys.usb.config", state);
        // wait for the transition to complete.
        // give up after 1 second.
        for (int i = 0; i < 20; i++) {
            // State transition is done when sys.usb.state is set to the new configuration
            if (state.equals(SystemProperties.get("sys.usb.state"))) return true;
            SystemClock.sleep(50);
        }
        return false;
    }

        也可通过反射机制进行调用，但其实最终实际执行的还是上面的代码。

try {
    final int MSG_SET_CURRENT_FUNCTIONS = 2;
    IBinder usb_service = ServiceManager.getService(Context.USB_SERVICE);

    Class<?> c_UsbService = Helpers.findClass("com.android.server.usb.UsbService");
    Field f_mDeviceManager = Helpers.findField(c_UsbService, "mDeviceManager");
    Object o_mDeviceManager = f_mDeviceManager.get(usb_service);

    Class<?> c_UsbDeviceManager = Helpers.findClass("com.android.server.usb.UsbDeviceManager");
    Field f_mHandler = Helpers.findField(c_UsbDeviceManager, "mHandler");
    Object o_mHandler = f_mHandler.get(o_mDeviceManager);
    Handler h_mHandler = (Handler) o_mHandler;

    // 禁用adb
    Field f_mAdbEnabled = Helpers.findField(c_UsbDeviceManager, "mAdbEnabled");
    f_mAdbEnabled.setBoolean(o_mDeviceManager, false);

    // 不提供USB服务
    Message msg = Message.obtain(h_mHandler, MSG_SET_CURRENT_FUNCTIONS);
    msg.obj = new String("none");
    msg.arg1 = 0;
    h_mHandler.removeMessages(MSG_SET_CURRENT_FUNCTIONS);
    h_mHandler.sendMessage(msg);

    Log.d("test", "[End]try disconnect USB");
    return true;
} catch (Throwable e) {
    e.printStackTrace();
    Log.e("test", "[disconnectUSB][Throwable]" + e.getMessage());
}
return false;