Fullscreen Activity

LauncherActivity.java

public class LauncherActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        hideSystemUI();
        setContentView(R.layout.activity_launcher);
    }

    private void hideSystemUI() {
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }
}