FLAG_KEEP_SCREEN_ON and Android 30

mrdebug

Hi, I'm using these lines of code

    #ifdef Q_OS_ANDROID
        QAndroidJniObject activity= QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative", "activity", "()Landroid/app/Activity;");
        if (activity.isValid()) {
            QAndroidJniObject window= activity.callObjectMethod("getWindow", "()Landroid/view/Window;");
            if (window.isValid()) {
                const int FLAG_KEEP_SCREEN_ON= 128;
                window.callMethod<void>("addFlags", "(I)V", FLAG_KEEP_SCREEN_ON);
            }
        }
        QAndroidJniEnvironment env;
        if (env->ExceptionCheck()) env->ExceptionClear();
    #endif

to keep the screen on. This approach works on an Android 6 device but not on an Android 11 device.
Does someone have a suggestion for me in order to resolve?

mrdebug

Solved following
https://forum.qt.io/topic/57625/solved-keep-android-5-screen-on

rdowell

@mrdebug said in FLAG_KEEP_SCREEN_ON and Android 30:

    QAndroidJniObject activity= QAndroidJniObject::callStaticObjectMethod("org/qtproject/qt5/android/QtNative", "activity", "()Landroid/app/Activity;");
    if (activity.isValid()) {
        QAndroidJniObject window= activity.callObjectMethod("getWindow", "()Landroid/view/Window;");
        if (window.isValid()) {
            const int FLAG_KEEP_SCREEN_ON= 128;
            window.callMethod<void>("addFlags", "(I)V", FLAG_KEEP_SCREEN_ON);
        }
    }
    QAndroidJniEnvironment env;
    if (env->ExceptionCheck()) env->ExceptionClear();

@mrdebug said in FLAG_KEEP_SCREEN_ON and Android 30:

Solved following
https://forum.qt.io/topic/57625/solved-keep-android-5-screen-on

What method did you solve this with from that linked issue? I tried the same code as you have here and it seems to work fine on Android 9, however we may be updating to 10/11 at some point. Did you use the method of extending the Qt Java activity and find that works on Android 11?

mrdebug

This approach works on Android 6 and 11

package it.denisgottardello.metronome.metronometouch;

public class MetronomeTouchMain extends org.qtproject.qt5.android.bindings.QtActivity {
    
    @Override
    public void onCreate(android.os.Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getWindow().addFlags(android.view.WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

}

This approach works on Android 6 but not on Android 11

QAndroidJniObject activity = QtAndroid::androidActivity();
if (activity.isValid()) {
    QAndroidJniObject window = activity.callObjectMethod("getWindow", "()Landroid/view/Window;");
    if (window.isValid()) {
        const int FLAG_KEEP_SCREEN_ON = 128;
        window.callObjectMethod("addFlags", "(I)V", FLAG_KEEP_SCREEN_ON);
    }
}