Make Status Bar Transparent

    public static void makeFullTranspatentStatusBar(Activity activity) {
        if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) {
            setWindowFlag(activity, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
        }
        if (Build.VERSION.SDK_INT >= 19) {
            activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        }
        if (Build.VERSION.SDK_INT >= 21) {
            setWindowFlag(activity, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
            activity.getWindow().setStatusBarColor(ContextCompat.getColor(activity, R.color.color_tran_opacity));
        }
    }