在專案當中，碰到了使用PulltoRefreshListView來展示新聞和多級評論，在評論那裡碰到了難題，如何解決多級評論的顯示呢？

為了方面起見，我直接使用ListView來代替PulltoRefreshListView做示例。

廢話不多說，直接看程式碼示例。

第一步：首先，新建MainActivity的XML佈局，佈局就一個ListView。之後再新建MainActivity類

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
    
    <ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent">
    </ListView>
</RelativeLayout>

第二步：新建HeaderView的佈局，就是ListView的頭部分，為方便理解，直接使用簡單化來展示 

<?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">

    <TextView
android:layout_width="match_parent"
android:layout_height=
 
"wrap_content"
android:text="文章Title"
android:textColor="@android:color/holo_red_dark"/>

    <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textColor="@android:color/holo_green_dark"
android:text="文章內容jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaffffffffffffffffffffffffffffffffffffffffffffffrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrreeeeeeeeeeee"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:orientation="vertical">

    <TextView
android:id="@+id/tvHotComment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:text="熱門評論"
android:textColor="@android:color/holo_red_dark"
android:textSize="20sp" />

    <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="一級評論內容"
android:textColor="@android:color/black" />

    <LinearLayout
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:background="@android:color/darker_gray">

    </LinearLayout>

</LinearLayout>

id為ll的LinearLayout是為了展示二級評論內容的；

第四步：

新建評論介面卡，繼承BaseAdapter，因為是本地展示，所以資料來源直接就以for迴圈來代替了。為了有熱門評論和最新評論之分，在介面卡中，寫入判斷position的位置決定title的顯示與文字的變化。介面卡程式碼如下：

package com.listviewdemo;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;

public class CommentAdapter extends BaseAdapter {
    private Context mContext;

    public CommentAdapter(Context context) {
        mContext=context;
    }

    @Override
public int getCount() {
        return 20;
    }

    @Override
public Object getItem(int i) {
        return null;
    }

    @Override
public long getItemId(int i) {
        return 0;
    }

    @Override
public View getView(int position, View view, ViewGroup viewGroup) {
        ViewHolder holder;
        if (view == null) {
            view = LayoutInflater.from(mContext).inflate(R.layout.comment_item, null);
            holder=new ViewHolder();
            holder.ll=(LinearLayout) view.findViewById(R.id.ll);
            holder.tvHot=(TextView) view.findViewById(R.id.tvHotComment);
            view.setTag(holder);
        } else {
            holder=(ViewHolder)view.getTag();
        }
        if(position==0){
            holder.tvHot.setVisibility(View.VISIBLE);
            holder.tvHot.setText("熱門評論");
        }else{
            if(position==3){
                holder.tvHot.setVisibility(View.VISIBLE);
                holder.tvHot.setText("最新評論");
            }else {
                holder.tvHot.setVisibility(View.GONE);
            }
        }
        holder.ll.removeAllViews();
        for(int i=0;i<3;++i){
            View commentItem2=LayoutInflater.from(mContext).inflate(R.layout.comment_2_item, null);
            holder.ll.addView(commentItem2);
        }
        return view;
    }

    class ViewHolder{
        LinearLayout ll;
        TextView tvHot;
    }
}

public class MainActivity extends AppCompatActivity {

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ListView listView=(ListView) findViewById(R.id.listView);
        View topView= LayoutInflater.from(this).inflate(R.layout.top_view,null);
        listView.addHeaderView(topView);
        listView.setAdapter(new CommentAdapter(this));
    }

}

效果圖如下：