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：

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。

以上这篇完美解决android m上锁屏情况下,禁止pc通过mtp访问手机存储单元就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。