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
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:
finalKeyguardManagerkeyguardManager=(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
+privatefinalBroadcastReceivermReceiver=newBroadcastReceiver(){ +@Override +publicvoidonReceive(Contextcontext,Intentintent){ +finalStringaction=intent.getAction(); +if(Intent.ACTION_USER_PRESENT.equals(action)){ +//Ifthemediascannerisrunning,itmaycurrentlybecalling +//sendObjectAdded/Removed,whichalsosynchronizesonmBinder +//(andinadditiontothat,allthenativeMtpServermethods +//lockthesameMutex).Ifithappenstobeinanmtpdevice +//write(),itmayblockforsometime,soprocessthisbroadcast +//inathread. +newThread(newRunnable(){ +@Override +publicvoidrun(){ +synchronized(mBinder){ +//Unhidethestorageunitswhentheuserhasunlockedthelockscreen +if(mMtpDisabled){ +addStorageDevicesLocked(); +mMtpDisabled=false; +} +} +}},"addStorageDevices").start(); +} +} +};
AndroidM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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