问题
My Question is similar to this one How can I wake an android device up and skip the screenlock
I want to display a dialogue box from broadcast receiver, but Android API is not allowing me to do that therefore I am using starting an activity from there and changing the theme of this activity to Theme.
Now I want this activity to be displayed even when phone is in locked mode/ sleep mode.
Screen I am able to turn on bu using below flags but Key Guard (Non Secured) I have to unlock manually. I am not able to see my window over locked screen.
The difference is that I am not using a full screen Activity i.e.
android:theme="@android:style/Theme.Dialog
in my code I am using
Window w = getWindow();
w.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
回答1:
I don't succeed in achieving this feature by using these Flags, but I did succeed by using the WakeLock and KeyguardLock. Below is what I do:
public class DismissLock extends Activity {
PowerManager pm;
WakeLock wl;
KeyguardManager km;
KeyguardLock kl;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
Log.i("INFO", "onCreate() in DismissLock");
pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
km=(KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
kl=km.newKeyguardLock("INFO");
wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP|PowerManager.ON_AFTER_RELEASE, "INFO");
wl.acquire(); //wake up the screen
kl.disableKeyguard();// dismiss the keyguard
setContentView(R.layout.main);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
wl.release(); //when the activiy pauses, we should realse the wakelock
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
wl.acquire();//must call this!
}
}
Of course, you still need to declare the permission in the manifest file.
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
来源:https://stackoverflow.com/questions/9554950/activity-to-be-displayed-even-when-phone-is-in-locked-mode