解决Android M上锁屏情况下,禁止PC通过MTP访问手机存储单元

释放双眼,带上耳机,听听看~!

1.问题解决主要文件:/m8976/packages/providers/MediaProvider/src/com/android/providers/media/MtpService.java

需要在MtpService.java中updateDisabledStateLocked方法添加锁屏情况限制:

    final KeyguardManager keyguardManager = (KeyguardManager) getSystemService(
                Context.KEYGUARD_SERVICE);
    mMtpDisabled = (keyguardManager.isKeyguardLocked() && keyguardManager.isKeyguardSecure()) || !mUnlocked || !isCurrentUser;

 

只要锁屏,mMtpDisabled就设置为true。

这样就实现该功能。

 

2.当解锁时,自动加载手机存储单元:

添加解锁监听

     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             final String action = intent.getAction();
             if (Intent.ACTION_USER_PRESENT.equals(action)) {
                 // If the media scanner is running, it may currently be calling
                 // sendObjectAdded/Removed, which also synchronizes on mBinder
                 // (and in addition to that, all the native MtpServer methods
                 // lock the same Mutex). If it happens to be in an mtp device
                 // write(), it may block for some time, so process this broadcast
                 // in a thread.
                 new Thread(new Runnable() {
                     @Override
                     public void run() {
                         synchronized (mBinder) {
                             // Unhide the storage units when the user has unlocked the lockscreen
                             if (mMtpDisabled) {
                                 addStorageDevicesLocked();
                                 mMtpDisabled = false;
                             }
                         }
                     }}, "addStorageDevices").start();
             }
         }
     };

 

Android M上发送解锁状态的广播code没有去除,可以查看/m8976/frameworks/base/packages/SystemUI/src/com/android       /systemui/keyguard/KeyguardViewMediator.java

在KeyguardViewMediator.java文件中可以看出,在解锁时,发送Intent.ACTION_USER_PRESENT广播,然后在MtpService.java

进行接收,对mMtpDisabled进行处理。

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