keep screen ON on Qt for Android

Zakaria

hi,
I like to know where is the main Activity java file so i can add this line

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

from this link http://developer.android.com/training/scheduling/wakelock.html

to keep the screen on when the app is running without an extra permission

thank you :)

SGaist

Hi,

Do you mean QtActivity.java ?

Zakaria

@SGaist
yes i found the QtActivity.java
but when i add the line as showen on the link : http://developer.android.com/training/scheduling/wakelock.html

i'm not able to run the APK

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
	/////// i added the line here 
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
	//////
        try {
            m_activityInfo = getPackageManager().getActivityInfo(getComponentName(), PackageManager.GET_META_DATA);
            for (Field f : Class.forName("android.R$style").getDeclaredFields()) {
                if (f.getInt(null) == m_activityInfo.getThemeResource()) {
                    QT_ANDROID_THEMES = new String[] {f.getName()};
                    QT_ANDROID_DEFAULT_THEME = f.getName();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            finish();
            return;
        }

        try {
            setTheme(Class.forName("android.R$style").getDeclaredField(QT_ANDROID_DEFAULT_THEME).getInt(null));
        } catch (Exception e) {
            e.printStackTrace();
        }

        if (Build.VERSION.SDK_INT > 10) {
            try {
                requestWindowFeature(Window.class.getField("FEATURE_ACTION_BAR").getInt(null));
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            requestWindowFeature(Window.FEATURE_NO_TITLE);
        }

        if (QtApplication.m_delegateObject != null && QtApplication.onCreate != null) {
            QtApplication.invokeDelegateMethod(QtApplication.onCreate, savedInstanceState);
            return;
        }

        m_displayDensity = getResources().getDisplayMetrics().densityDpi;

        ENVIRONMENT_VARIABLES += "\tQT_ANDROID_THEME=" + QT_ANDROID_DEFAULT_THEME
                              + "/\tQT_ANDROID_THEME_DISPLAY_DPI=" + m_displayDensity + "\t";

        if (null == getLastNonConfigurationInstance()) {
            // if splash screen is defined, then show it
            if (m_activityInfo.metaData.containsKey("android.app.splash_screen_drawable"))
                getWindow().setBackgroundDrawableResource(m_activityInfo.metaData.getInt("android.app.splash_screen_drawable"));
            else
                getWindow().setBackgroundDrawable(new ColorDrawable(0xff000000));

            if (m_activityInfo.metaData.containsKey("android.app.background_running")
                && m_activityInfo.metaData.getBoolean("android.app.background_running")) {
                ENVIRONMENT_VARIABLES += "QT_BLOCK_EVENT_LOOPS_WHEN_SUSPENDED=0\t";
            } else {
                ENVIRONMENT_VARIABLES += "QT_BLOCK_EVENT_LOOPS_WHEN_SUSPENDED=1\t";
            }

            if (m_activityInfo.metaData.containsKey("android.app.auto_screen_scale_factor")
                && m_activityInfo.metaData.getBoolean("android.app.auto_screen_scale_factor")) {
                ENVIRONMENT_VARIABLES += "QT_AUTO_SCREEN_SCALE_FACTOR=1\t";
            }
			
            startApp(true);
        }
		
    }

thank you

Zakaria

@SGaist
thank you i solved it by adding 'this.' to the line of code in the QtActivity.java

@Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
		this.getWindow().addFlags(android.view.WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
....
}

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

Ramon Faria

@Zakaria Thanks! Still working in 5.9.2.