Disable fullscreen mode after setting FLAG_LAYOUT_IN_SCREEN in Android - android

I have to inherit a custom main activity class which is a 3rd party lib and I cannot make any change to the class. This class adds FLAG_LAYOUT_IN_SCREEN to the window and it causes the app to be on full screen. However, I wanna prevent this behavior. So, the question is how can I clear/disable the full screen mode and can display navigation bar/status bar?
Here is the custom main activity class
public class CustomActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
setContentView(new FrameLayout(this));
// rest...
}
}
Here is my activity class:
public class MyActivity extends CustomActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// tried these attempts below, but none of them prevented
// the fullscreen mode which hides navigation bar and status bar.
this.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN);
this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
this.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}
}
Note: You can also test it on a sample app easily. You would notice once you add the FLAG_LAYOUT_IN_SCREEN, full-screen mode remains for different attempts as well.
public class MainActivity extends Activity {
private FrameLayout mainLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().addFlags(FLAG_LAYOUT_IN_SCREEN);
setContentView(new FrameLayout(this));
this.getWindow().clearFlags(FLAG_LAYOUT_IN_SCREEN);
this.getWindow().addFlags(FLAG_KEEP_SCREEN_ON);
}


Please apply the following to the app to not be as full screen (showing status bar)
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

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I am not exactly sure I understand your question, can you perhaps elaborate some more? maybe even post some sample code that you are using currently.
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for example :
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#Override
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}
protected abstract int getLayoutResourceId();
}
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#Override
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#Override
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}

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