Transparent statusbar

transparent_statusbar.java

 /**
     * need call setFitsSystemWindows(false) on view that need it
     *
     * @param activity
     */
    public static void setStatusBarTransparent(@NonNull 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 |
                            View.SYSTEM_UI_FLAG_IMMERSIVE);
        }
        if (Build.VERSION.SDK_INT >= 21) {
            activity.getWindow().setStatusBarColor(Color.TRANSPARENT);
        }
        ViewGroup layoutRoot = getLayoutRoot(activity);
        if (layoutRoot != null) {
            layoutRoot.setFitsSystemWindows(false);
        }
    }


    /**
     * Make status bar with solid color
     * need call setFitsSystemWindows(true) on view that need it
     *
     * @param activity
     * @param statusBarColor
     */
    public static void setStatusBarColor(@NonNull Activity activity, int statusBarColor) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            activity.getWindow().setStatusBarColor(statusBarColor);
        }
        activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
        ViewGroup layoutRoot = getLayoutRoot(activity);
        if (layoutRoot != null) {
            layoutRoot.setFitsSystemWindows(true);
        }
    }

    public static ViewGroup getLayoutRoot(Activity activity) {
        ViewGroup contentView = activity.findViewById(android.R.id.content);
        View maybelayoutRoot = contentView.getChildAt(0);
        if (maybelayoutRoot != null && maybelayoutRoot instanceof ViewGroup) {
            return (ViewGroup) maybelayoutRoot;
        }
        return null;
    }


    public static void setWindowFlag(Activity activity, final int bits, boolean on) {
        Window win = activity.getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        if (on) {
            winParams.flags |= bits;
        } else {
            winParams.flags &= ~bits;
        }
        win.setAttributes(winParams);
    }