gistfile1.java

@Override
    protected void onCreate(Bundle savedInstanceState) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            Window w = getWindow();
            w.addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
            w.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        }
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        handler = new Handler();
        handler.postDelayed(runnable = new Runnable() {
            @Override
            public void run() {
                runTimer();
                handler.postDelayed(this, INTERVAL);
            }
        }, INTERVAL);
    }