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完美解決android M上鎖屏情況下,禁止pc通過(guò)MTP訪問(wèn)手機(jī)存儲(chǔ)單元

 更新時(shí)間:2017年04月14日 10:54:38   投稿:jingxian  
下面小編就為大家?guī)?lái)一篇完美解決android M上鎖屏情況下,禁止pc通過(guò)MTP訪問(wèn)手機(jī)存儲(chǔ)單元。小編覺(jué)得挺不錯(cuò)的,現(xiàn)在就分享給大家,也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

1、問(wèn)題解決主要文件:/m8976/packages/providers/MediaProvider/src/com/android/providers/media/MtpService.java

需要在MtpService.java中updateDisabledStateLocked 方法添加鎖屏情況限制:

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

只要鎖屏,mMtpDisabled就設(shè)置為true。

這樣就實(shí)現(xiàn)該功能。

2、當(dāng)解鎖時(shí),自動(dòng)加載手機(jī)存儲(chǔ)單元:

添加解鎖監(jiān)聽(tīng)

+  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上發(fā)送解鎖狀態(tài)的廣播code沒(méi)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,在解鎖時(shí),發(fā)送Intent.ACTION_USER_PRESENT廣播,然后在MtpService.java

進(jìn)行接收,對(duì)mMtpDisabled進(jìn)行處理。

以上這篇完美解決android M上鎖屏情況下,禁止pc通過(guò)MTP訪問(wèn)手機(jī)存儲(chǔ)單元就是小編分享給大家的全部?jī)?nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。

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