Hide Android Default key (Home,Back and the other) in my App

Question

I have a project in which i want to make the Layouts FullScreen or make the Android Soft keys hidden. I tried solutions by Googling like

1. Hide Action Bar
2. SYSTEM_UI_FLAG_HIDE_NAVIGATION
3. Also test the change of theme in app Theme.AppCompat.Light.NoActionBar

I disabled Back Key using this code :

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) 
{    
        if(keyCode == KeyEvent.KEYCODE_HOME)
        {
            Log.i("Home Button", "Clicked");
        }
        if(keyCode==KeyEvent.KEYCODE_BACK)
        {

            finish();
        }
        return false;
};

But i want to disable all Soft Keys or Hide them. Note that the device in which my app will work is Lenovo Tab2 and has Virtual Soft keys like this Pic.

Answer 1

Use this code in onCreate method and after setContentView(). It helped me.

if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT )
        {
            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 // hide nav bar
                    | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY );
        }