Wake up from sleep Android 4.4 Qt

bijanbina

I'm designing an app that should turn off screen if a button pressed and wake the device up if a certain package received on TCP/IP. To acheive this the android device can be rooted and have no lock screen.
My application GUI is written in qml and the TCP server/client and the corresponding handlers written in QT. The screen turn off work out of the box by using Android device admin
But I had difficult time to figure out a function for waking up part. I used answer from StackExchange - Turn ON Screen programmatically on Android with no lock
I can receive the packet while the device is in sleep mode and I can set window flag succefully (for exmple FLAG_FULLSCREEN) but the mentioned solution not wake up my device, despite that I am sure the flag has been set.
Here is my code:

       QAndroidJniObject javaControl;
       QtAndroid::runOnAndroidThread([&javaControl]()
       {
           int FLAG_SHOW_WHEN_LOCKED = QAndroidJniObject::getStaticField<jint>(
                       "android/view/WindowManager$LayoutParams","FLAG_SHOW_WHEN_LOCKED");
           int FLAG_DISMISS_KEYGUARD = QAndroidJniObject::getStaticField<jint>(
                       "android/view/WindowManager$LayoutParams","FLAG_DISMISS_KEYGUARD");
           int FLAG_KEEP_SCREEN_ON = QAndroidJniObject::getStaticField<jint>(
                       "android/view/WindowManager$LayoutParams","FLAG_KEEP_SCREEN_ON");
           int FLAG_TURN_SCREEN_ON = QAndroidJniObject::getStaticField<jint>(
                       "android/view/WindowManager$LayoutParams","FLAG_TURN_SCREEN_ON");
           int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON = QAndroidJniObject::getStaticField<jint>(
                       "android/view/WindowManager$LayoutParams","FLAG_ALLOW_LOCK_WHILE_SCREEN_ON");
           qDebug() << "MI6 Hello:" << (FLAG_SHOW_WHEN_LOCKED |
                       FLAG_DISMISS_KEYGUARD | FLAG_KEEP_SCREEN_ON |
                       FLAG_TURN_SCREEN_ON | FLAG_ALLOW_LOCK_WHILE_SCREEN_ON);

           QAndroidJniObject activity = QtAndroid::androidActivity();
           QAndroidJniObject a_window = activity.callObjectMethod("getWindow", "()Landroid/view/Window;");
           a_window.callMethod<void>("addFlags", "(I)V", FLAG_SHOW_WHEN_LOCKED |
                                   FLAG_DISMISS_KEYGUARD | FLAG_KEEP_SCREEN_ON |
                                   FLAG_TURN_SCREEN_ON | FLAG_ALLOW_LOCK_WHILE_SCREEN_ON);
       });

I ran the code in main thread because it is the only way to set a window flag