android M上锁屏 禁止pc通过MTP访问手机存储 完美解决android M上锁屏情况下,禁止pc通过MTP访问手机存储单元
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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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