frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java
在 interceptKeyBeforeQueueing()
思路:锁屏后,拦截锁屏键事件
KeyguardManager keyguardManager = (KeyguardManager) ActivityThread.currentApplication().getSystemService(Context.KEYGUARD_SERVICE);
if (keyguardManager.isKeyguardLocked() && keyCode == KeyEvent.KEYCODE_BREAK){
return 0;
}
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