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找一找教程网。
