android DialogFragment 实现Dialog展示扫二维码图片展示

近期开发项目，做个按钮点击弹出展示微信二维码关注微信公众号的展示框，于是想到DialogFragment，期间对Dialog的title的底框字体颜色做出相关设置，记录如下：

下面是 DialogFragment.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal|center_vertical">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/wechat"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="20dp"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="关注后提醒用户登录账户"
        android:textColor="#e70012"
        android:textSize="18dp"
        android:layout_marginBottom="20dp"/>
</LinearLayout>

DialogFragment.java：

public class FragmentDialogWeChatImage extends DialogFragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View mView=inflater.inflate(R.layout.fragment_dialog_wechat_image,container,false);
        getDialog().setTitle("扫码关注微信公众号");//设置Dialog字体颜色
        TextView title=(TextView) getDialog().findViewById(android.R.id.title);
        title.setTextColor(getResources().getColor(R.color.red));//设置字体颜色
        title.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL);//设置字体水平居中

        int titleDividerId = getResources().getIdentifier("titleDivider", "id", "android");
        View titleDivider = getDialog().findViewById(titleDividerId);
        if (titleDivider != null) {
            titleDivider.setBackgroundColor(getResources().getColor(android.R.color.holo_red_light));//设置标题底线color
        }
        return mView;
    }

}

点击按钮实现弹出DialogFragment：

   /**
     * 点击关联微信
     */
    @OnClick(R.id.txt_relation_wechat)
    public void onClickWechat(View view){
        FragmentDialogWeChatImage fdw=new FragmentDialogWeChatImage();
        FragmentTransaction ft=getFragmentManager().beginTransaction();
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        fdw.show(ft,"fdw");
    }