Android ExpandableListView单选以及多选实现代码

时间:2022-12-07 20:34:56

一、概述

ExpandableListView是常用的一个控件,今天自己做了个小练习,主要需求是单选以及多选的实现,看似比较简单,但是还是比较复杂,把代码贴给大家,有这种需求的可以参考一下。

二、效果截图

Android ExpandableListView单选以及多选实现代码

三、实现过程

activity_main.xml

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  tools:context=".MainActivity" >
 
  <ExpandableListView
    android:id="@+id/exlistview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:listSelector="@android:color/transparent" >
  </ExpandableListView>
 
</LinearLayout>

group_item.xml

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:descendantFocusability="blocksDescendants"
  android:padding="10dp" >
 
  <TextView
    android:id="@+id/id_group_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:layout_marginLeft="10dp"
    android:padding="10dp"
    android:text="hao"
    android:textColor="@android:color/black"
    android:textIsSelectable="true"
    android:textSize="15sp" >
  </TextView>
 
  <CheckBox
    android:id="@+id/id_group_checkbox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true" />
 
</RelativeLayout>

listview_item.xml

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:descendantFocusability="blocksDescendants"
  android:padding="10dp" >
 
  <TextView
    android:id="@+id/id_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:padding="10dp"
    android:layout_marginLeft="30dp"
    android:textColor="#55acac"
    android:textIsSelectable="true"
    android:textSize="15sp" >
  </TextView>
 
  <CheckBox
    android:id="@+id/id_checkbox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:clickable="false"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true" />
 
</RelativeLayout>

 MainAcitivity.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
public class MainActivity extends Activity {
  private List<Map<String, String>> parentList = new ArrayList<Map<String, String>>();
  private List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();
  private ExpandableListView exListView;
  private Context context = this;
  private MyAdapter adapter;
 
  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    initView();
    initData();
    setListener();
  }
 
  /**
   * 记录正在选中的子listview的item条目 用hashset是为了去除重复值
   */
  private HashSet<String> hashSet;
 
  private void setListener()
  {
    exListView.setOnGroupExpandListener(new OnGroupExpandListener()
    {
       
      @Override
      public void onGroupExpand(int groupPosition)
      {
        //存取已选定的集合
        hashSet = new HashSet<String>();
      }
    });
    // ExpandableListView的Group的点击事件
    exListView.setOnGroupClickListener(new OnGroupClickListener()
    {
 
      @Override
      public boolean onGroupClick(ExpandableListView parent, View v,
          int groupPosition, long id)
      {
        // 可以写点击后实现的功能
         
        return false;
      }
    });
    // ExpandableListView的child的点击事件
 
    exListView.setOnChildClickListener(new OnChildClickListener()
    {
 
      @Override
      public boolean onChildClick(ExpandableListView parent, View v,
          int groupPosition, int childPosition, long id)
      {
        Map<String, String> map = childData.get(groupPosition).get(
            childPosition);
        String childChecked = map.get("isChecked");
        if ("No".equals(childChecked))
        {
          map.put("isChecked", "Yes");
          hashSet.add("选定" + childPosition);
        } else
        {
          map.put("isChecked", "No");
          if (hashSet.contains("选定" + childPosition))
          {
            hashSet.remove("选定" + childPosition);
          }
        }
        System.out.println("选定的长度==1" + hashSet.size());
        System.out.println("选定的长度==2"
            + childData.get(groupPosition).size());
        if (hashSet.size() == childData.get(groupPosition).size())
        {
          parentList.get(groupPosition).put("isGroupCheckd", "Yes");
        } else
        {
          parentList.get(groupPosition).put("isGroupCheckd", "No");
        }
        adapter.notifyDataSetChanged();
        return false;
      }
    });
  }
 
  // 初始化数据
  private void initData()
  {
    for (int i = 0; i < 10; i++)
    {
      Map<String, String> groupMap = new HashMap<String, String>();
      groupMap.put("groupText", "item" + i);
      groupMap.put("isGroupCheckd", "No");
      parentList.add(groupMap);
    }
    for (int i = 0; i < 10; i++)
    {
      List<Map<String, String>> list = new ArrayList<Map<String, String>>();
      for (int j = 0; j < 4; j++)
      {
        Map<String, String> map = new HashMap<String, String>();
        map.put("childItem", "childItem" + j);
        map.put("isChecked", "No");
        list.add(map);
      }
      childData.add(list);
    }
    adapter = new MyAdapter();
    exListView.setAdapter(adapter);
    exListView.expandGroup(0);
    hashSet = new HashSet<String>();
  }
 
  private void initView()
  {
    exListView = (ExpandableListView) findViewById(R.id.exlistview);
  }
 
  /**
   * 适配adapter
   */
 
  private class MyAdapter extends BaseExpandableListAdapter {
    @Override
    public Object getChild(int groupPosition, int childPosition)
    {
      // TODO Auto-generated method stub
      return childData.get(groupPosition).get(childPosition);
    }
 
    @Override
    public long getChildId(int groupPosition, int childPosition)
    {
      // TODO Auto-generated method stub
      return childPosition;
    }
 
    @Override
    public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent)
    {
 
      ViewHolder holder = null;
      if (convertView == null)
      {
        holder = new ViewHolder();
        convertView = View.inflate(context, R.layout.listview_item,
            null);
        holder.childText = (TextView) convertView
            .findViewById(R.id.id_text);
        holder.childBox = (CheckBox) convertView
            .findViewById(R.id.id_checkbox);
        convertView.setTag(holder);
      } else
      {
        holder = (ViewHolder) convertView.getTag();
      }
      holder.childText.setText(childData.get(groupPosition)
          .get(childPosition).get("childItem"));
      String isChecked = childData.get(groupPosition).get(childPosition)
          .get("isChecked");
      if ("No".equals(isChecked))
      {
        holder.childBox.setChecked(false);
      } else
      {
        holder.childBox.setChecked(true);
      }
      return convertView;
    }
 
    @Override
    public int getChildrenCount(int groupPosition)
    {
      // TODO Auto-generated method stub
      return childData.get(groupPosition).size();
    }
 
    @Override
    public Object getGroup(int groupPosition)
    {
      return parentList.get(groupPosition);
    }
 
    @Override
    public int getGroupCount()
    {
      // TODO Auto-generated method stub
      return parentList.size();
    }
 
    @Override
    public long getGroupId(int groupPosition)
    {
      // TODO Auto-generated method stub
      return groupPosition;
    }
 
    @Override
    public View getGroupView(final int groupPosition,
        final boolean isExpanded, View convertView, ViewGroup parent)
    {
      ViewHolder holder = null;
      if (convertView == null)
      {
        holder = new ViewHolder();
        convertView = View.inflate(context, R.layout.group_item, null);
        holder.groupText = (TextView) convertView
            .findViewById(R.id.id_group_text);
        holder.groupBox = (CheckBox) convertView
            .findViewById(R.id.id_group_checkbox);
        convertView.setTag(holder);
      } else
      {
        holder = (ViewHolder) convertView.getTag();
      }
      holder.groupText.setText(parentList.get(groupPosition).get(
          "groupText"));
      final String isGroupCheckd = parentList.get(groupPosition).get(
          "isGroupCheckd");
 
      if ("No".equals(isGroupCheckd))
      {
        holder.groupBox.setChecked(false);
      } else
      {
        holder.groupBox.setChecked(true);
      }
     
      /*
       * groupListView的点击事件
       */
      holder.groupBox.setOnClickListener(new OnClickListener()
      {
 
        @Override
        public void onClick(View v)
        {
          CheckBox groupBox = (CheckBox) v
              .findViewById(R.id.id_group_checkbox);
          if (!isExpanded)
          {
            //展开某个group view
            exListView.expandGroup(groupPosition);
          } else
          {
            //关闭某个group view
            exListView.collapseGroup(groupPosition);
          }
 
          if ("No".equals(isGroupCheckd))
          {
            exListView.expandGroup(groupPosition);
            groupBox.setChecked(true);
            parentList.get(groupPosition).put("isGroupCheckd",
                "Yes");
            List<Map<String, String>> list = childData
                .get(groupPosition);
            for (Map<String, String> map : list)
            {
              map.put("isChecked", "Yes");
            }
          } else
          {
            groupBox.setChecked(false);
            parentList.get(groupPosition)
                .put("isGroupCheckd", "No");
            List<Map<String, String>> list = childData
                .get(groupPosition);
            for (Map<String, String> map : list)
            {
              map.put("isChecked", "No");
            }
          }
          notifyDataSetChanged();
        }
      });
      return convertView;
    }
 
    @Override
    public boolean hasStableIds()
    {
      return true;
    }
 
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition)
    {
      return true;
    }
 
  }
 
  private class ViewHolder {
    TextView groupText, childText;
    CheckBox groupBox, childBox;
  }
}

四、总结及注意点

1、设置CheckBox的点击事件,而非别的

2、exListView.collapseGroup(groupPosition); 关闭正展开的子ListView.

这是demo地址,欢迎下载:

Demo下载地址

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

原文链接:https://blog.csdn.net/Hello201404/article/details/48546387