android Dialog: 去除dialog 顶部 蓝色的线

去除某些Android手机系统上dialog顶部出现的分割线

/**
     * When using a custom Dialog, there will be a blue line at the top of the
     * dialog displayed on some Android devices, use this method to eliminate it
     */
    private void hiddenTopDivider() {
        Context context = getContext();
        int dividerId = context.getResources().getIdentifier("android:id/titleDivider", null, null);
        View divider = findViewById(dividerId);
        if (divider != null) {
            divider.setBackgroundColor(Color.TRANSPARENT);
        }
    }