多级列表ExpandableListView
扩展列表能够显示一个指示在每项显示项的当前状态（状态通常是一个扩展的组，组的孩子，或倒塌，最后一个孩子）。使用setchildindicator（drawable）或setgroupindicator（drawable）（或相应的XML属性）来设置这些指标,一个默认的风格多级列表提供指标，将示给意见多级列表。布局android.r.layout.simple_expandable_list_item_1和android.r.layout.simple_expandable_list_item_2（应用simplecursortreeadapter）包含位置信息的首选指标。
1 activity_main.xml
2 <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:background="#ffffff"
6 android:orientation="vertical">
7 <ExpandableListView
8 android:id="@+id/expandableListView"
9 android:layout_width="match_parent"
10 android:layout_height="match_parent"
11 android:divider="#E4E4E4"
12 android:dividerHeight="5dp">
13 </ExpandableListView>
14 </LinearLayout>
15 child_item.xml
16 <?xmlversion="1.0"encoding="utf-8"?>
17 <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
18 android:layout_width="match_parent"
19 android:layout_height="match_parent"
20 android:orientation="vertical">
21 <TextView
22 android:id="@+id/textViews"
23 android:layout_width="wrap_content"
24 android:layout_height="wrap_content"/>
25 <View
26 android:layout_width="match_parent"
27 android:layout_height="0.5dp"
28 android:background="#ff0000"/>
29 </LinearLayout>
30 groud_item.xml
31 <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
32 xmlns:tools="http://schemas.android.com/tools"
33 android:layout_width="match_parent"
34 android:layout_height="match_parent"
35 android:gravity="center_vertical"
36 android:orientation="horizontal">
37 <ImageView
38 android:id="@+id/imageView1"
39 android:layout_width="65dp"
40 android:layout_height="55dp"
41 android:layout_marginLeft="10dp"
42 android:scaleType="fitXY"
43 android:class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="@drawable/l1"/>
44 <TextView
45 android:id="@+id/textView"
46 android:layout_width="wrap_content"
47 android:layout_height="wrap_content"
48 android:layout_marginLeft="10dp"
49 android:text="斯蒂芬"/>
50 </LinearLayout>
1 public class MainActivity extends Activity {
2 private ExpandableListView listView;
3 private List<String> group;
4 private List<List<String>> child;
5 private MyAdapter adapter;
6 @Override
7 protected void onCreate(Bundle savedInstanceState) {
8 super.onCreate(savedInstanceState);
9 setContentView(R.layout.activity_main);
10
11 listView = (ExpandableListView) findViewById(R.id.expandableListView);
12 /**
13 * 初始化数据
14 */
15 initData();
16 adapter = new MyAdapter(this,group,child);
17 listView.setAdapter(adapter);
18
19 }
20
21
22
23
24 private void initData() {
25 group = new ArrayList<String>();
26 child = new ArrayList<List<String>>();
27 addInfo("笑傲江湖",new String[]{"东方不败","风清扬","令狐冲","岳不群"});
28 addInfo("天龙八部", new String[]{"乔峰","虚竹","段誉"});
29 addInfo("九阴真经", new String[]{"中神通","东邪","西毒","南帝","北丐"});
30 }
31
32 /**
33 * 添加数据信息
34 * @param g
35 * @param c
36 */
37 private void addInfo(String g,String[] c) {
38 group.add(g);
39 List<String> list = new ArrayList<String>();
40 for (int i = 0; i < c.length; i++) {
41 list.add(c[i]);
42 }
43 child.add(list);
44 }
45
46 }
1 /**
2 * expandableListView的用法同ListView
3 *
4 */
5 public class MyAdapter extends BaseExpandableListAdapter {
6 private Context context;
7 private List<String> group;
8 private List<List<String>> child;
9 private int[] img={R.drawable.l2,R.drawable.l3,R.drawable.l1};
10 public MyAdapter(Context context, List<String> group,
11 List<List<String>> child) {
12 this.context = context;
13 this.group = group;
14 this.child = child;
15 }
16
17 @Override
18 public int getGroupCount() {
19 return group.size();
20 }
21
22 @Override
23 public int getChildrenCount(int groupPosition) {
24 return child.get(groupPosition).size();
25 }
26
27 @Override
28 public Object getGroup(int groupPosition) {
29 return group.get(groupPosition);
30 }
31
32 @Override
33 public Object getChild(int groupPosition, int childPosition) {
34 return child.get(childPosition).get(childPosition);
35 }
36
37 @Override
38 public long getGroupId(int groupPosition) {
39 return groupPosition;
40 }
41
42 @Override
43 public long getChildId(int groupPosition, int childPosition) {
44 return childPosition;
45 }
46
47 @Override
48 public boolean hasStableIds() {
49 return false;
50 }
51
52 /**
53 *
54 * 获取显示指定组的视图对象
55 *
56 * @param groupPosition 组位置
57 * @param isExpanded 该组是展开状态还是伸缩状态
58 * @param convertView 重用已有的视图对象
59 * @param parent 返回的视图对象始终依附于的视图组
60 * @return
61 * @see android.widget.ExpandableListAdapter#getGroupView(int, boolean, android.view.View,
62 * android.view.ViewGroup)
63 */
64 @Override
65 public View getGroupView(int groupPosition, boolean isExpanded,
66 View convertView, ViewGroup parent) {
67 ViewHolder holder;
68 if (convertView == null) {
69 convertView = LayoutInflater.from(context).inflate(
70 R.layout.groud_item, null);
71 holder = new ViewHolder();
72 holder.textView = (TextView) convertView
73 .findViewById(R.id.textView);
74 holder.mImageView=(ImageView) convertView.findViewById(R.id.imageView1);
75 convertView.setTag(holder);
76 } else {
77 holder = (ViewHolder) convertView.getTag();
78 }
79 holder.textView.setText(group.get(groupPosition));
80 holder.textView.setTextSize(25);
81 holder.textView.setPadding(36, 10, 0, 10);
82 holder.mImageView.setImageResource(img[groupPosition]);
83 return convertView;
84
85 }
86
87 /**
88 *
89 * 获取一个视图对象，显示指定组中的指定子元素数据。
90 *
91 * @param groupPosition 组位置
92 * @param childPosition 子元素位置
93 * @param isLastChild 子元素是否处于组中的最后一个
94 * @param convertView 重用已有的视图(View)对象
95 * @param parent 返回的视图(View)对象始终依附于的视图组
96 * @return
97 * @see android.widget.ExpandableListAdapter#getChildView(int, int, boolean, android.view.View,
98 * android.view.ViewGroup)
99 */
100 @Override
101 public View getChildView(int groupPosition, int childPosition,
102 boolean isLastChild, View convertView, ViewGroup parent) {
103 ViewHolder holder;
104 if (convertView == null) {
105 convertView = LayoutInflater.from(context).inflate(
106 R.layout.child_item, null);
107 holder = new ViewHolder();
108 holder.textView = (TextView) convertView
109 .findViewById(R.id.textViews);
110 convertView.setTag(holder);
111 } else {
112 holder = (ViewHolder) convertView.getTag();
113 }
114 holder.textView.setText(child.get(groupPosition).get(childPosition));
115 holder.textView.setTextSize(20);
116 holder.textView.setPadding(72, 10, 0, 10);
117 return convertView;
118 }
119
120
121
122 /**
123 *
124 * 是否选中指定位置上的子元素。
125 *
126 * @param groupPosition
127 * @param childPosition
128 * @return
129 * @see android.widget.ExpandableListAdapter#isChildSelectable(int, int)
130 */
131 @Override
132 public boolean isChildSelectable(int groupPosition, int childPosition) {
133 return false;
134 }
135
136
137 class ViewHolder {
138 ImageView mImageView;
139 TextView textView;
140 }
141 }
Eclipse下载：http://download.csdn.net/detail/dickyqie/9630549
AndroidStudio下载：https://github.com/DickyQie/ListViewExpandableListViewDelete/tree/expandablelistview
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