Android Studio: how to remove navigation bar in android app to get a full screen view?

Question

How do I remove the navigation bar to get Full Screen View?

So far I've tried setting the theme using:

<style name="AppTheme" parent="@android:style/Theme.Holo.Light.NoActionBar">
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> 

and

<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>

in styles.xml
and

android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">

in activity_main.xml
and i also tried

ActionBar ac = getSupportActionBar();
ac.hide();

even tried

requestWindowFeature(Window.FEATURE_NO_TITLE);

in my MainActivity.java but this only made action bar to disappear. I have

been trying for a few days now but can't figure this out.

Answer 1

Try! call it in onCreate()

getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

And

@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus) {
    getWindow().getDecorView().setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
}
}

Answer 2

you need fullscreen layout try this:

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN );

add it in the onCreate of the Activity that you wanted to see fullscreen.