Android ExpandableListView实现仿好友列表

效果图：

实现这一效果我们需要用到的类是ExpandableListView

xml文件：

<?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">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <ExpandableListView            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:id="@+id/elv_score_view"            ></ExpandableListView>    </LinearLayout></LinearLayout>

Activity文件：

package com.example.a;import android.app.ExpandableListActivity;import android.content.Context;import android.database.Cursor;import android.database.DataSetObserver;import android.database.sqlite.SQLiteDatabase;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v4.app.Fragment;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.SimpleExpandableListAdapter;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Created by Administrator on 2017/6/18 0018. */public class ScoreFragment extends Fragment {    private ExpandableListView elv_score_view;    private SQLiteDatabase sqLiteDatabase;    private List<String> Group;    private List<List<String>> Child;    private List<String> ChildFirst;    private List<String> ChildSecond;    private List<String> ChildThird;    private List<String> ChildFour;    private List<String> ChildFive;    private List<String> ChildSix;    private List<List<Integer>> ChildPicture;    private Cursor cursor_sztl,cursor_sztl_true,cursor_sztl_false,cursor_njjzw,cursor_njjzw_true,cursor_njjzw_false,            cursor_wxcs,cursor_wxcs_true,cursor_wxcs_false,cursor_dlzjwd,cursor_dlzjwd_true,            cursor_dlzjwd_false,cursor_bkzs,cursor_bkzs_true,cursor_bkzs_false,cursor_shcs,    cursor_shcs_true,cursor_shcs_false;    public ScoreFragment(SQLiteDatabase sqLiteDatabase){        this.sqLiteDatabase=sqLiteDatabase;    }    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view=inflater.inflate(R.layout.fragment_score,null);        cursor_wxcs = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"文学常识"});        cursor_wxcs_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"文学常识",1+""});        cursor_wxcs_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"文学常识",2+""});        cursor_sztl = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"数字推理"});        cursor_sztl_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"数字推理",1+""});        cursor_sztl_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"数字推理",2+""});        cursor_njjzw = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"脑经急转弯"});        cursor_njjzw_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"脑经急转弯",1+""});        cursor_njjzw_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"脑经急转弯",2+""});        cursor_dlzjwd = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"地理知识问答"});        cursor_dlzjwd_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"地理知识问答",1+""});        cursor_dlzjwd_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"地理知识问答",2+""});        cursor_bkzs = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"百科知识"});        cursor_bkzs_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"百科知识",1+""});        cursor_bkzs_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"百科知识",2+""});        cursor_shcs = sqLiteDatabase.rawQuery("select * from topic where classify=?",new String[]{"生活常识"});        cursor_shcs_true=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"生活常识",1+""});        cursor_shcs_false=sqLiteDatabase.rawQuery("select * from topic where classify=? and tisboolean=?",new String[]{"生活常识",2+""});        Group = new ArrayList<String>();        Group.add("文学常识");        Group.add("数字推理");        Group.add("脑经急转弯");        Group.add("地理知识问答");        Group.add("百科知识");        Group.add("生活常识");        ChildThird= new ArrayList<String>();        ChildThird.add("正确题数："+cursor_wxcs_true.getCount());        ChildThird.add("错误题数："+cursor_wxcs_false.getCount());        ChildThird.add("未完成题数："+(cursor_wxcs.getCount()-cursor_wxcs_false.getCount()-cursor_wxcs_true.getCount()));        ChildFirst = new ArrayList<String>();        ChildFirst.add("正确题数："+cursor_sztl_true.getCount());        ChildFirst.add("错误题数："+cursor_sztl_false.getCount());        ChildFirst.add("未完成题数："+(cursor_sztl.getCount()-cursor_sztl_false.getCount()-cursor_sztl_true.getCount()));        ChildSecond= new ArrayList<String>();        ChildSecond.add("正确题数："+cursor_njjzw_true.getCount());        ChildSecond.add("错误题数："+cursor_njjzw_false.getCount());        ChildSecond.add("未完成题数："+(cursor_njjzw.getCount()-cursor_njjzw_false.getCount()-cursor_njjzw_true.getCount()));        ChildFour= new ArrayList<String>();        ChildFour.add("正确题数："+cursor_dlzjwd_true.getCount());        ChildFour.add("错误题数："+cursor_dlzjwd_false.getCount());        ChildFour.add("未完成题数："+(cursor_dlzjwd.getCount()-cursor_dlzjwd_false.getCount()-cursor_dlzjwd_true.getCount()));        ChildFive= new ArrayList<String>();        ChildFive.add("正确题数："+cursor_bkzs_true.getCount());        ChildFive.add("错误题数："+cursor_bkzs_false.getCount());        ChildFive.add("未完成题数："+(cursor_bkzs.getCount()-cursor_bkzs_false.getCount()-cursor_bkzs_true.getCount()));        ChildSix= new ArrayList<String>();        ChildSix.add("正确题数："+cursor_shcs_true.getCount());        ChildSix.add("错误题数："+cursor_shcs_false.getCount());        ChildSix.add("未完成题数："+(cursor_shcs.getCount()-cursor_shcs_false.getCount()-cursor_shcs_true.getCount()));        Child = new ArrayList<List<String>>();        Child.add(ChildThird);        Child.add(ChildFirst);        Child.add(ChildSecond);        Child.add(ChildFour);        Child.add(ChildFive);        Child.add(ChildSix);        List<Integer> tmp_list = new ArrayList<Integer>();        tmp_list.add(R.drawable.p_true);        tmp_list.add(R.drawable.p_false);        tmp_list.add(R.drawable.bz);        ChildPicture = new ArrayList<List<Integer>>();        ChildPicture.add(tmp_list);        ChildPicture.add(tmp_list);        ChildPicture.add(tmp_list);        ChildPicture.add(tmp_list);        ChildPicture.add(tmp_list);        ChildPicture.add(tmp_list);        elv_score_view = (ExpandableListView) view.findViewById(R.id.elv_score_view);        elv_score_view.setAdapter(new MyExpandableListViewAdapter(getActivity()));        elv_score_view.setGroupIndicator(null);        return view;    }    class MyExpandableListViewAdapter extends BaseExpandableListAdapter{        private Context context;        public MyExpandableListViewAdapter(Context context) {            this.context = context;        }        @Override        public int getGroupCount() {            return Group.size();        }        @Override        public int getChildrenCount(int groupPosition) {            return Child.get(groupPosition).size();        }        @Override        public Object getGroup(int groupPosition) {            return Group.get(groupPosition);        }        @Override        public Object getChild(int groupPosition, int childPosition) {            return Child.get(groupPosition).get(childPosition);        }        @Override        public long getGroupId(int groupPosition) {            return groupPosition;        }        @Override        public long getChildId(int groupPosition, int childPosition) {            return childPosition;        }        @Override        public boolean hasStableIds() {            return true;        }        @Override        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {            GroupHolder groupHolder=null;            if (convertView==null){                convertView=getActivity().getLayoutInflater().from(context).inflate(R.layout.group,null);                groupHolder = new GroupHolder();                groupHolder.txt= (TextView) convertView.findViewById(R.id.notice_item_date);                convertView.setTag(groupHolder);            }else{                groupHolder= (GroupHolder) convertView.getTag();            }            groupHolder.txt.setText(Group.get(groupPosition));            return convertView;        }        @Override        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {            ItemHolder itemHolder = null;            if (convertView == null) {                convertView = (View) getActivity().getLayoutInflater().from(context).inflate(                        R.layout.child, null);                itemHolder = new ItemHolder();                itemHolder.txt = (TextView) convertView.findViewById(R.id.group);                itemHolder.img = (ImageView) convertView.findViewById(R.id.iv);                convertView.setTag(itemHolder);            } else {                itemHolder = (ItemHolder) convertView.getTag();            }            itemHolder.txt.setText(Child.get(groupPosition).get(                    childPosition));            itemHolder.img.setBackgroundResource(ChildPicture.get(groupPosition).get(                    childPosition));            return convertView;        }        @Override        public boolean isChildSelectable(int groupPosition, int childPosition) {            return true;        }    }    class GroupHolder {        public TextView txt;        public ImageView img;    }    class ItemHolder {        public ImageView img;        public TextView txt;    }}

只需要写好上述代码就可以实现图中的效果了。