使用自定义的BaseAdapter实现LIstView的展示

http://stephen830.iteye.com/blog/1141394

使用自定义的BaseAdapter实现LIstView的展示

实现以下功能点：

1.通过自定义的BaseAdapter展示ListView；

2.动态修改、刷新ListView内容；

3.在自定义的BaseAdapter中实现ListView内容的点击和长按点击事件；

4.在BaseAdapter的getView方法中动态增加新组件；

效果图如下：

xml配置文件1（list_view01.xml）

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <LinearLayout
8. android:orientation="horizontal"
9. android:layout_width="fill_parent"
10. android:layout_height="wrap_content"
11. >
12. <EditText
13. android:id="@+id/editText01Edit"
14. android:layout_width="110sp"
15. android:layout_height="wrap_content"
16. android:text=""
17. />
18. <Button
19. android:id="@+id/button01Edit"
20. android:layout_width="wrap_content"
21. android:layout_height="wrap_content"
22. android:text="动态修改第1行第2列数据"
23. android:onClick="editPersonAndRefreshListView01"
24. />
25. </LinearLayout>
26. <ListView
27. android:id="@+id/listView01"
28. android:layout_width="fill_parent"
29. android:layout_height="fill_parent"
30. />
31. </LinearLayout>

xml配置文件2（list_view01_item.xml）

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="horizontal"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <TextView
8. android:id="@+id/listView01Item01"
9. android:layout_width="50sp"
10. android:layout_height="wrap_content"
11. />
12. <TextView
13. android:id="@+id/listView01Item02"
14. android:layout_width="90sp"
15. android:layout_height="wrap_content"
16. />
17. <TextView
18. android:id="@+id/listView01Item03"
19. android:layout_width="wrap_content"
20. android:layout_height="wrap_content"
21. />
22. </LinearLayout>

Activity类代码:

1. package com.zhouzijing.android;
2. import java.util.ArrayList;
3. import java.util.List;
4. import com.zhouzijing.android.util.MenuEntity;
5. import android.app.Activity;
6. import android.os.Bundle;
7. import android.view.ContextMenu;
8. import android.view.ContextMenu.ContextMenuInfo;
9. import android.view.MenuItem;
10. import android.view.View;
11. import android.view.View.OnCreateContextMenuListener;
12. import android.widget.AdapterView;
13. import android.widget.AdapterView.AdapterContextMenuInfo;
14. import android.widget.AdapterView.OnItemClickListener;
15. import android.widget.AdapterView.OnItemLongClickListener;
16. import android.widget.AdapterView.OnItemSelectedListener;
17. import android.widget.BaseAdapter;
18. import android.widget.EditText;
19. import android.widget.ListAdapter;
20. import android.widget.ListView;
21. import android.widget.Toast;
22. public class ListViewDemo extends Activity {
23. //定义Person
24. List<Person> persons ;
25. ListAdapter adapter = null;
26. ListView listView01 = null;
27. EditText editTextPersonName = null;
28. //定义上下文菜单
29. final private static int CONTEXT_MENU_EDIT = 0;//菜单[编辑]的编号
30. final private static int CONTEXT_MENU_SHARE = 1;//菜单[分享]的编号
31. final private static int CONTEXT_MENU_DELETE = 2;//菜单[删除]的编号
32. final private static int CONTEXT_MENU_CANCEL = 3;//菜单[取消]的编号
33. private MenuEntity[] contextMenus = {
34. new MenuEntity(0, CONTEXT_MENU_EDIT, 0, "编辑"),
35. new MenuEntity(0, CONTEXT_MENU_SHARE, 1, "分享"),
36. new MenuEntity(0, CONTEXT_MENU_DELETE, 2, "删除"),
37. new MenuEntity(0, CONTEXT_MENU_CANCEL, 3, "取消"),
38. };
39. @Override
40. public void onCreate(Bundle savedInstanceState) {
41. super.onCreate(savedInstanceState);
42. setContentView(R.layout.list_view01);
43. //获取组件
44. listView01 = (ListView)findViewById(R.id.listView01);
45. editTextPersonName = (EditText)findViewById(R.id.editText01Edit);
46. //显示ListView
47. initListAllPersons();
48. showByMyBaseAdapter();
49. //初始化ListView的事件
50. //initListView01Event();
51. }
52. public void initListAllPersons(){
53. persons = new ArrayList<Person>();
54. persons.add(new Person(100,"李小龙","香港",android.R.drawable.ic_delete));
55. persons.add(new Person(101,"施瓦辛格","美国",android.R.drawable.ic_dialog_alert));
56. persons.add(new Person(102,"戴安娜王妃","英国",android.R.drawable.ic_dialog_dialer));
57. persons.add(new Person(103,"成龙","香港",android.R.drawable.ic_dialog_map));
58. persons.add(new Person(104,"史泰龙","美国",android.R.drawable.ic_lock_idle_alarm));
59. persons.add(new Person(105,"圣女贞德","法国",android.R.drawable.ic_media_next));
60. persons.add(new Person(106,"列宁","苏联",android.R.drawable.ic_media_play));
61. persons.add(new Person(107,"爱迪生","美国",android.R.drawable.ic_menu_add));
62. persons.add(new Person(108,"孔子","中国",android.R.drawable.ic_media_rew));
63. persons.add(new Person(109,"杨七郎","宋朝",android.R.drawable.ic_menu_zoom));
64. persons.add(new Person(110,"秦始皇","秦国",android.R.drawable.ic_menu_agenda));
65. persons.add(new Person(111,"岳飞","宋朝",android.R.drawable.ic_lock_lock));
66. }
67. public void showByMyBaseAdapter(){
68. adapter = new MyBaseAdapter(this, persons);
69. listView01.setAdapter(adapter);
70. }
71. /**
72. * 按钮button01Edit的onClick事件.
73. * @param view
74. */
75. public void editPersonAndRefreshListView01(View view){
76. //获取TextEdit数据
77. String value = editTextPersonName.getText().toString();
78. //更新ListView的内容，并且动态刷新.
79. persons.get(0).name=value;
80. ((BaseAdapter) adapter).notifyDataSetChanged();
81. }
82. /**
83. * 初始化listView01的事件.
84. */
85. public void initListView01Event(){
86. //ListView的item点击事件
87. listView01.setOnItemClickListener(new OnItemClickListener(){
88. @Override
89. public void onItemClick(AdapterView<?> parent, View view,
90. int position, long id) {
91. Toast.makeText(getApplicationContext(),
92. "[OnItemClickListener]点击了："+persons.get(position).name,
93. Toast.LENGTH_SHORT).show();
94. }
95. });
96. //ListView的item长按点击事件
97. listView01.setOnItemLongClickListener(new OnItemLongClickListener(){
98. @Override
99. public boolean onItemLongClick(AdapterView<?> parent, View view,
100. int position, long id) {
101. Toast.makeText(getApplicationContext(),
102. "[OnItemLongClickListener]点击了："+persons.get(position).name,
103. Toast.LENGTH_SHORT).show();
104. return false;
105. }
106. });
107. //ListView的键盘选中事件(直接触摸屏幕选中不会激发)
108. listView01.setOnItemSelectedListener(new OnItemSelectedListener(){
109. @Override
110. public void onItemSelected(AdapterView<?> parent, View view,
111. int position, long id) {
112. Toast.makeText(getApplicationContext(),
113. "[OnItemSelectedListener:onItemSelected]点击了："
114. +persons.get(position).name,
115. Toast.LENGTH_SHORT).show();
116. }
117. @Override
118. public void onNothingSelected(AdapterView<?> parent) {
119. Toast.makeText(getApplicationContext(),
120. "[OnItemSelectedListener:onNothingSelected]点击了",
121. Toast.LENGTH_SHORT).show();
122. }
123. });
124. //ListView组件:创建上下文菜单
125. listView01.setOnCreateContextMenuListener(new OnCreateContextMenuListener(){
126. @Override
127. public void onCreateContextMenu(ContextMenu menu, View v,
128. ContextMenuInfo menuInfo) {
129. //获取上下文菜单点击的ListView的位置(position)属性
130. AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
131. int position = info.position;
132. //设置上下文菜单标题
133. menu.setHeaderTitle(persons.get(position).name);
134. //设置上下文菜单栏目
135. MenuEntity menuEntity = null;
136. for(int i=0;i<contextMenus.length;i++){
137. menuEntity = contextMenus[i];
138. menu.add(menuEntity.getGroupId(),menuEntity.getItemId()
139. ,menuEntity.getOrder(),menuEntity.getTitle());
140. }
141. }
142. });
143. }
144. //监听选择上下文菜单的选择事件
145. @Override
146. public boolean onContextItemSelected(MenuItem item) {
147. //选中的上下文菜单的itemId
148. int itemId = item.getItemId();
149. //获取上下文菜单点击的ListView的位置(position)属性
150. AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
151. int position = info.position;
152. //Toast
153. Toast.makeText(getApplicationContext(),
154. "[onContextItemSelected]点击了"+persons.get(position).name+"" +
155. ",菜单="+contextMenus[itemId].getTitle(),
156. Toast.LENGTH_SHORT).show();
157. return true;
158. }
159. }

Person类代码

1. package com.zhouzijing.android;
2. public class Person {
3. public int id;
4. public String name;
5. public String address;
6. public int photo;
7. public Person(int id, String name, String address,int photo) {
8. super();
9. this.id = id;
10. this.name = name;
11. this.address = address;
12. this.photo = photo;
13. }
14. }

自定义的BaseAdapter类代码

1. package com.zhouzijing.android;
2. import java.util.List;
3. import android.content.Context;
4. import android.util.Log;
5. import android.view.Gravity;
6. import android.view.LayoutInflater;
7. import android.view.View;
8. import android.view.View.OnClickListener;
9. import android.view.View.OnLongClickListener;
10. import android.view.ViewGroup;
11. import android.widget.BaseAdapter;
12. import android.widget.ImageView;
13. import android.widget.LinearLayout;
14. import android.widget.TextView;
15. import android.widget.Toast;
16. public class MyBaseAdapter extends BaseAdapter {
17. private List<Person> persons;
18. Context context;
19. public MyBaseAdapter(Context context,List<Person> persons){
20. this.persons = persons;
21. this.context = context;
22. }
23. @Override
24. public int getCount() {
25. return (persons==null)?0:persons.size();
26. }
27. @Override
28. public Object getItem(int position) {
29. return persons.get(position);
30. }
31. @Override
32. public long getItemId(int position) {
33. return position;
34. }
35. public class ViewHolder{
36. TextView textViewItem01;
37. TextView textViewItem02;
38. TextView textViewItem03;
39. ImageView imageView;
40. }
41. @Override
42. public View getView(int position, View convertView, ViewGroup parent) {
43. final Person person = (Person)getItem(position);
44. ViewHolder viewHolder = null;
45. if(convertView==null){
46. Log.d("MyBaseAdapter", "新建convertView,position="+position);
47. convertView = LayoutInflater.from(context).inflate(
48. R.layout.list_view01_item, null);
49. viewHolder = new ViewHolder();
50. viewHolder.textViewItem01 = (TextView)convertView.findViewById(
51. R.id.listView01Item01);
52. viewHolder.textViewItem02 = (TextView)convertView.findViewById(
53. R.id.listView01Item02);
54. viewHolder.textViewItem03 = (TextView)convertView.findViewById(
55. R.id.listView01Item03);
56. //动态增加1个ImageView
57. viewHolder.imageView = new ImageView(context);
58. LinearLayout.LayoutParams mParams = new LinearLayout.LayoutParams(
59. LinearLayout.LayoutParams.WRAP_CONTENT,
60. LinearLayout.LayoutParams.WRAP_CONTENT);
61. mParams.gravity = Gravity.CENTER;
62. mParams.width=50;
63. viewHolder.imageView.setLayoutParams(mParams);
64. //这个ImageView放到ListView的第2列之后
65. ((LinearLayout)convertView).addView(viewHolder.imageView,2);
66. convertView.setTag(viewHolder);
67. }else{
68. viewHolder = (ViewHolder)convertView.getTag();
69. Log.d("MyBaseAdapter", "旧的convertView,position="+position);
70. }
71. viewHolder.textViewItem01.setText(String.valueOf(person.id));
72. viewHolder.textViewItem02.setText(person.name);
73. viewHolder.textViewItem03.setText(person.address);
74. viewHolder.imageView.setImageResource(person.photo);
75. //对ListView中第1个TextView配置OnClick事件
76. viewHolder.textViewItem01.setOnClickListener(new OnClickListener(){
77. @Override
78. public void onClick(View v) {
79. Toast.makeText(context,
80. "[textViewItem01.setOnClickListener]点击了"+person.name,
81. Toast.LENGTH_SHORT).show();
82. }
83. });
84. //对ListView中的每一行信息配置OnClick事件
85. convertView.setOnClickListener(new OnClickListener(){
86. @Override
87. public void onClick(View v) {
88. Toast.makeText(context,
89. "[convertView.setOnClickListener]点击了"+person.name,
90. Toast.LENGTH_SHORT).show();
91. }
92. });
93. //对ListView中的每一行信息配置OnLongClick事件
94. convertView.setOnLongClickListener(new OnLongClickListener(){
95. @Override
96. public boolean onLongClick(View v) {
97. Toast.makeText(context,
98. "[convertView.setOnLongClickListener]点击了"+person.name,
99. Toast.LENGTH_SHORT).show();
100. return true;
101. }
102. });
103. return convertView;
104. }
105. }

MenuEntity类代码：

1. package com.zhouzijing.android.util;
2. /**
3. * 定义菜单实体结构.
4. * @author stephen
5. *
6. */
7. public class MenuEntity{
8. /**
9. * 生成菜单.
10. * @param groupId
11. * @param itemId
12. * @param order
13. * @param title
14. */
15. public MenuEntity(int groupId, int itemId, int order, CharSequence title) {
16. super();
17. this.groupId = groupId;
18. this.itemId = itemId;
19. this.order = order;
20. this.title = title;
21. }
22. /**
23. * 组.
24. */
25. private int groupId;
26. /**
27. * 菜单编号.
28. */
29. private int itemId;
30. /**
31. * 显示顺序号.
32. */
33. private int order;
34. /**
35. * 菜单显示名称.
36. */
37. private CharSequence title;
38. /**
39. * @return the groupId
40. */
41. public int getGroupId() {
42. return groupId;
43. }
44. /**
45. * @param groupId the groupId to set
46. */
47. public void setGroupId(int groupId) {
48. this.groupId = groupId;
49. }
50. /**
51. * @return the itemId
52. */
53. public int getItemId() {
54. return itemId;
55. }
56. /**
57. * @param itemId the itemId to set
58. */
59. public void setItemId(int itemId) {
60. this.itemId = itemId;
61. }
62. /**
63. * @return the order
64. */
65. public int getOrder() {
66. return order;
67. }
68. /**
69. * @param order the order to set
70. */
71. public void setOrder(int order) {
72. this.order = order;
73. }
74. /**
75. * @return the title
76. */
77. public CharSequence getTitle() {
78. return title;
79. }
80. /**
81. * @param title the title to set
82. */
83. public void setTitle(CharSequence title) {
84. this.title = title;
85. }
86. }