BaseExpandableListAdapter

先看效果~

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2011-5-8 08:45 上传

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也就是BaseExpandableListAdapter、AbsListView类的使用，就不多说了..大牛留情...

就两个类。

ExpandLabel:

1. package com.yfz;
2. import java.util.ArrayList;
3. import java.util.List;
4. import android.app.Activity;
5. import android.os.Bundle;
6. import android.view.ViewGroup.LayoutParams;
7. import android.widget.ExpandableListView;
8. import android.widget.ViewFlipper;
9. public class ExpandLabel extends Activity {
10.     /** Called when the activity is first created. */
11.     @Override
12.     public void onCreate(Bundle savedInstanceState) {
13.         super.onCreate(savedInstanceState);
14.         setContentView(R.layout.main);
15.        
16.         // 数据源
17.         //标题
18.         List<String> groupArray = new ArrayList<String>();
19.         //子标题
20.         List<List<String>> childArray = new ArrayList<List<String>>();
21.                 groupArray.add("第一章");
22.                 groupArray.add("第二章");
23.                 List<String> tempArray01 = new ArrayList<String>();
24.                 tempArray01.add("第1.1节");
25.                 tempArray01.add("第1.2节");
26.                 tempArray01.add("第1.3节");
27.                
28.                 List<String> tempArray02 = new ArrayList<String>();
29.                 tempArray02.add("第2.1节");
30.                 tempArray02.add("第2.2节");
31.                 tempArray02.add("第2.3节");
32.                
33.                 childArray.add(tempArray01);
34.                 childArray.add(tempArray02);
35.                
36.         ExpandableListView expandableListView = new ExpandableListView(this);
37.        
38.         ExpandableAdapter adapter = new ExpandableAdapter(this,groupArray,childArray);
39.        
40.                 expandableListView.setAdapter(adapter);
41.                
42.                 addContentView(expandableListView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
43.     }
44. }

复制代码

树形菜单类，只要传两个List过来就可以直接使用了。groupArray：表示一级菜单childArray： 表示二级菜单 二级菜单相当于一个二维List，该List中存储的每个元素都是一个List。第一个元素对应一级菜单中第一个菜单的子项List，第二个元素对应一级菜单中第二个菜单的子项List，依次类推。ExpandableAdapter：

1. package com.yfz;
2. import java.util.ArrayList;
3. import java.util.List;
4. import android.app.Activity;
5. import android.view.Gravity;
6. import android.view.View;
7. import android.view.ViewGroup;
8. import android.widget.AbsListView;
9. import android.widget.BaseExpandableListAdapter;
10. import android.widget.TextView;
11. public class ExpandableAdapter extends BaseExpandableListAdapter {
12.                
13.         private List<String> groupArray;
14.         private List<List<String>> childArray;
15.         private Activity activity;
16.         public ExpandableAdapter(Activity a,List<String> groupArray,List<List<String>> childArray) {
17.                 activity = a;
18.                 this.groupArray = groupArray;
19.                 this.childArray = childArray;
20.         }
21.        
22.         @Override
23.         public Object getChild(int groupPosition, int childPosition) {
24.                 // TODO Auto-generated method stub
25.                 return childArray.get(groupPosition).get(childPosition);
26.         }
27.         @Override
28.         public long getChildId(int groupPosition, int childPosition) {
29.                 // TODO Auto-generated method stub
30.                 return childPosition;
31.         }
32.         @Override
33.         public View getChildView(int groupPosition, int childPosition,
34.                         boolean isLastChild, View convertView, ViewGroup parent) {
35.                 // TODO Auto-generated method stub
36.                 String string = childArray.get(groupPosition).get(childPosition);
37.                 return getGenericView(string);
38.         }
39.         @Override
40.         public int getChildrenCount(int groupPosition) {
41.                 // TODO Auto-generated method stub
42.                 return childArray.get(groupPosition).size();
43.         }
44.         @Override
45.         public Object getGroup(int groupPosition) {
46.                 // TODO Auto-generated method stub
47.                 return groupArray.get(groupPosition);
48.         }
49.         @Override
50.         public int getGroupCount() {
51.                 // TODO Auto-generated method stub
52.                 return groupArray.size();
53.         }
54.         @Override
55.         public long getGroupId(int groupPosition) {
56.                 // TODO Auto-generated method stub
57.                 return groupPosition;
58.         }
59.         @Override
60.         public View getGroupView(int groupPosition, boolean isExpanded,
61.                         View convertView, ViewGroup parent) {
62.                 // TODO Auto-generated method stub
63.                 String string = groupArray.get(groupPosition);
64.                 return getGenericView(string);
65.         }
66.         @Override
67.         public boolean hasStableIds() {
68.                 // TODO Auto-generated method stub
69.                 return false;
70.         }
71.         @Override
72.         public boolean isChildSelectable(int groupPosition, int childPosition) {
73.                 // TODO Auto-generated method stub
74.                 return false;
75.         }
76.        
77. /****************************************以下为自定义方法*********************************************/       
78.         /**
79.          * Children 's View
80.          * @param string
81.          * @return
82.          */
83.         public TextView getGenericView(String string) {
84.                 AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 64);
85.                 TextView text = new TextView(activity);
86.                 text.setLayoutParams(layoutParams);
87.                 // Center the text vertically
88.                 text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
89.                 // Set the text starting position
90.                 text.setPadding(36, 0, 0, 0);
91.                 text.setText(string);
92.                 return text;
93.         }
94. }