public static void setStatusBarDark(Window window, boolean dark) {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    }    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.setStatusBarColor(Color.TRANSPARENT);
    }    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        View decorView = window.getDecorView();        if (decorView != null) {            int vis = 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;            if (dark) {
                vis |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
            } else {
                vis &= ~View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
            }
            decorView.setSystemUiVisibility(vis);
        }
    }
}

原文链接：http://www.apkbus.com/blog-362570-77469.html