1. ActivityMain .java
   
2. 
   
3. package study.com.android;
   
4. 
   
5. import android.app.ExpandableListActivity;
   
6. import android.os.Bundle;
   
7. import android.view.ContextMenu;
   
8. import android.view.MenuItem;
   
9. import android.view.View;
   
10. import android.view.ContextMenu.ContextMenuInfo;
    
11. import android.widget.ExpandableListAdapter;
    
12. import android.widget.ExpandableListView;
    
13. import android.widget.TextView;
    
14. import android.widget.Toast;
    
15. import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
    
16. 
    
17. public class ActivityMain extends ExpandableListActivity {
    
18. 
    
19. private ExpandableListAdapter mAdapter;
    
20. 
    
21. @Override
    
22. public void onCreate(Bundle savedInstanceState) {
    
23. super.onCreate(savedInstanceState);
    
24. this.setTitle("ExpandableList");
    
25. mAdapter = new MyExpandableListAdapter(this);
    
26. setListAdapter(mAdapter);
    
27. registerForContextMenu(this.getExpandableListView());
    
28. }
    
29. 
    
30. // 为列表的每一项创建上下文菜单（即长按后 呼出的菜单）
    
31. @Override
    
32. public void onCreateContextMenu(ContextMenu menu, View v,
    
33. ContextMenuInfo menuInfo) {
    
34. menu.setHeaderTitle("ContexMenu");
    
35. menu.add(0, 0, 0, "ContextMenu");
    
36. }
    
37. 
    
38. // 单击上下文菜单后的逻辑
    
39. @Override
    
40. public boolean onContextItemSelected(MenuItem item) {
    
41. 
    
42. ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item
    
43. .getMenuInfo();
    
44. String title = ((TextView) info.targetView).getText().toString();
    
45. 
    
46. int type = ExpandableListView
    
47. .getPackedPositionType(info.packedPosition);
    
48. if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
    
49. 
    
50. int groupPos = ExpandableListView
    
51. .getPackedPositionGroup(info.packedPosition);
    
52. int childPos = ExpandableListView
    
53. .getPackedPositionChild(info.packedPosition);
    
54. Toast.makeText(
    
55. this,
    
56. title + "-Group Index" + groupPos + "Child Index:"
    
57. + childPos, Toast.LENGTH_SHORT).show();
    
58. return true;
    
59. }
    
60. return false;
    
61. }
    
62. }
    
63. MyExpandableListAdapter.java
    
64. 
    
65. package study.com.android;
    
66. 
    
67. import android.content.Context;
    
68. import android.view.Gravity;
    
69. import android.view.View;
    
70. import android.view.ViewGroup;
    
71. import android.widget.AbsListView;
    
72. import android.widget.BaseExpandableListAdapter;
    
73. import android.widget.TextView;
    
74. 
    
75. public class MyExpandableListAdapter extends BaseExpandableListAdapter {
    
76. 
    
77. private Context mContext;
    
78. 
    
79. // 父列表数据
    
80. private String[] groups = { "group1", "group2", "group3", "group4", "" };
    
81. 
    
82. // 子列表数据
    
83. private String[][] children = { { "child1" }, { "child1", "child2" },
    
84. { "child1", "child2", "child3" },
    
85. { "child1", "child2", "child3", "child4" }, };
    
86. 
    
87. MyExpandableListAdapter(Context context) {
    
88. mContext = context;
    
89. }
    
90. 
    
91. @Override
    
92. public Object getChild(int groupPosition, int childPosition) {
    
93. // TODO Auto-generated method stub
    
94. return children[groupPosition][childPosition];
    
95. }
    
96. 
    
97. @Override
    
98. public long getChildId(int groupPosition, int childPosition) {
    
99. // TODO Auto-generated method stub
    
100. return childPosition;
     
101. }
     
102. 
     
103. // 取子列表中的某一项的view
     
104. @Override
     
105. public View getChildView(int groupPosition, int childPosition,
     
106. boolean isLastChild, View convertView, ViewGroup parent) {
     
107. TextView textView = getGenericView();
     
108. ;
     
109. textView.setText(getChild(groupPosition, childPosition).toString());
     
110. return textView;
     
111. }
     
112. 
     
113. @Override
     
114. public int getChildrenCount(int groupPosition) {
     
115. // TODO Auto-generated method stub
     
116. return children[groupPosition].length;
     
117. }
     
118. 
     
119. @Override
     
120. public Object getGroup(int groupPosition) {
     
121. return groups[groupPosition];
     
122. }
     
123. 
     
124. @Override
     
125. public int getGroupCount() {
     
126. // TODO Auto-generated method stub
     
127. return groups.length;
     
128. }
     
129. 
     
130. @Override
     
131. public long getGroupId(int groupPosition) {
     
132. // TODO Auto-generated method stub
     
133. return groupPosition;
     
134. }
     
135. 
     
136. @Override
     
137. public View getGroupView(int groupPosition, boolean isExpanded,
     
138. View convertView, ViewGroup parent) {
     
139. TextView textView = getGenericView();
     
140. textView.setText(getGroup(groupPosition).toString());
     
141. 
     
142. return textView;
     
143. }
     
144. 
     
145. @Override
     
146. public boolean hasStableIds() {
     
147. // TODO Auto-generated method stub
     
148. return true;
     
149. }
     
150. 
     
151. @Override
     
152. public boolean isChildSelectable(int groupPosition, int childPosition) {
     
153. // TODO Auto-generated method stub
     
154. return true;
     
155. }
     
156. 
     
157. // 获取某一项的view的逻辑
     
158. private TextView getGenericView() {
     
159. AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
     
160. ViewGroup.LayoutParams.FILL_PARENT, 48);
     
161. TextView textView = new TextView(mContext);
     
162. textView.setLayoutParams(lp);
     
163. textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
     
164. textView.setPadding(32, 0, 0, 0);
     
165. return textView;
     
166. }
     
167. 
     
168. }
     

复制代码

运行的结果如下：

1. ActivityMain .java
   
2. 
   
3. package study.com.android;
   
4. 
   
5. import android.app.ExpandableListActivity;
   
6. import android.os.Bundle;
   
7. import android.view.ContextMenu;
   
8. import android.view.MenuItem;
   
9. import android.view.View;
   
10. import android.view.ContextMenu.ContextMenuInfo;
    
11. import android.widget.ExpandableListAdapter;
    
12. import android.widget.ExpandableListView;
    
13. import android.widget.TextView;
    
14. import android.widget.Toast;
    
15. import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
    
16. 
    
17. public class ActivityMain extends ExpandableListActivity {
    
18. 
    
19. private ExpandableListAdapter mAdapter;
    
20. 
    
21. @Override
    
22. public void onCreate(Bundle savedInstanceState) {
    
23. super.onCreate(savedInstanceState);
    
24. this.setTitle("ExpandableList");
    
25. mAdapter = new MyExpandableListAdapter(this);
    
26. setListAdapter(mAdapter);
    
27. registerForContextMenu(this.getExpandableListView());
    
28. }
    
29. 
    
30. // 为列表的每一项创建上下文菜单（即长按后 呼出的菜单）
    
31. @Override
    
32. public void onCreateContextMenu(ContextMenu menu, View v,
    
33. ContextMenuInfo menuInfo) {
    
34. menu.setHeaderTitle("ContexMenu");
    
35. menu.add(0, 0, 0, "ContextMenu");
    
36. }
    
37. 
    
38. // 单击上下文菜单后的逻辑
    
39. @Override
    
40. public boolean onContextItemSelected(MenuItem item) {
    
41. 
    
42. ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) item
    
43. .getMenuInfo();
    
44. String title = ((TextView) info.targetView).getText().toString();
    
45. 
    
46. int type = ExpandableListView
    
47. .getPackedPositionType(info.packedPosition);
    
48. if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
    
49. 
    
50. int groupPos = ExpandableListView
    
51. .getPackedPositionGroup(info.packedPosition);
    
52. int childPos = ExpandableListView
    
53. .getPackedPositionChild(info.packedPosition);
    
54. Toast.makeText(
    
55. this,
    
56. title + "-Group Index" + groupPos + "Child Index:"
    
57. + childPos, Toast.LENGTH_SHORT).show();
    
58. return true;
    
59. }
    
60. return false;
    
61. }
    
62. }
    
63. MyExpandableListAdapter.java
    
64. 
    
65. package study.com.android;
    
66. 
    
67. import android.content.Context;
    
68. import android.view.Gravity;
    
69. import android.view.View;
    
70. import android.view.ViewGroup;
    
71. import android.widget.AbsListView;
    
72. import android.widget.BaseExpandableListAdapter;
    
73. import android.widget.TextView;
    
74. 
    
75. public class MyExpandableListAdapter extends BaseExpandableListAdapter {
    
76. 
    
77. private Context mContext;
    
78. 
    
79. // 父列表数据
    
80. private String[] groups = { "group1", "group2", "group3", "group4", "" };
    
81. 
    
82. // 子列表数据
    
83. private String[][] children = { { "child1" }, { "child1", "child2" },
    
84. { "child1", "child2", "child3" },
    
85. { "child1", "child2", "child3", "child4" }, };
    
86. 
    
87. MyExpandableListAdapter(Context context) {
    
88. mContext = context;
    
89. }
    
90. 
    
91. @Override
    
92. public Object getChild(int groupPosition, int childPosition) {
    
93. // TODO Auto-generated method stub
    
94. return children[groupPosition][childPosition];
    
95. }
    
96. 
    
97. @Override
    
98. public long getChildId(int groupPosition, int childPosition) {
    
99. // TODO Auto-generated method stub
    
100. return childPosition;
     
101. }
     
102. 
     
103. // 取子列表中的某一项的view
     
104. @Override
     
105. public View getChildView(int groupPosition, int childPosition,
     
106. boolean isLastChild, View convertView, ViewGroup parent) {
     
107. TextView textView = getGenericView();
     
108. ;
     
109. textView.setText(getChild(groupPosition, childPosition).toString());
     
110. return textView;
     
111. }
     
112. 
     
113. @Override
     
114. public int getChildrenCount(int groupPosition) {
     
115. // TODO Auto-generated method stub
     
116. return children[groupPosition].length;
     
117. }
     
118. 
     
119. @Override
     
120. public Object getGroup(int groupPosition) {
     
121. return groups[groupPosition];
     
122. }
     
123. 
     
124. @Override
     
125. public int getGroupCount() {
     
126. // TODO Auto-generated method stub
     
127. return groups.length;
     
128. }
     
129. 
     
130. @Override
     
131. public long getGroupId(int groupPosition) {
     
132. // TODO Auto-generated method stub
     
133. return groupPosition;
     
134. }
     
135. 
     
136. @Override
     
137. public View getGroupView(int groupPosition, boolean isExpanded,
     
138. View convertView, ViewGroup parent) {
     
139. TextView textView = getGenericView();
     
140. textView.setText(getGroup(groupPosition).toString());
     
141. 
     
142. return textView;
     
143. }
     
144. 
     
145. @Override
     
146. public boolean hasStableIds() {
     
147. // TODO Auto-generated method stub
     
148. return true;
     
149. }
     
150. 
     
151. @Override
     
152. public boolean isChildSelectable(int groupPosition, int childPosition) {
     
153. // TODO Auto-generated method stub
     
154. return true;
     
155. }
     
156. 
     
157. // 获取某一项的view的逻辑
     
158. private TextView getGenericView() {
     
159. AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
     
160. ViewGroup.LayoutParams.FILL_PARENT, 48);
     
161. TextView textView = new TextView(mContext);
     
162. textView.setLayoutParams(lp);
     
163. textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
     
164. textView.setPadding(32, 0, 0, 0);
     
165. return textView;
     
166. }
     
167. 
     
168. }
     

复制代码

运行的结果如下：