自定义ListView item包含checkbox实现单选和多选

淩亂°似流年 2024-02-17 16:59 55阅读 0赞

CheckBox本为复选框,仍然可以当单选框用

自定义ListView item中包含一个textview 和checkbox,checkbox选中级别高于item,故在xml中进行屏蔽

单选方法:(该方法同样适用于radiobutton)

main.xml

**\[html\]** [view plain][] [copy][view plain]

1. **<****span**style="font-size:14px;"**>****<?****xml**version="1.0"encoding="utf-8"**?>**
2. **<****LinearLayout**xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout\_width="match\_parent"
4. android:layout\_height="match\_parent"
5. android:orientation="vertical"
6. **>**
7. **<****ImageView**
8. android:id="@+id/img"
9. android:layout\_width="fill\_parent"
10. android:layout\_height="wrap\_content"
11. android:src="@drawable/triangle16blue"**/>**
12. 
13. **<****ListView**
14. android:id="@+id/lvGroup"
15. android:layout\_width="fill\_parent"
16. android:layout\_height="fill\_parent"
17. android:background="@drawable/downbutton\_corner"**/>**
18. 
19. **</****LinearLayout****>****</****span****>**

**\[html\]** [view plain][] [copy][view plain]

1. **<****span**style="font-size:14px;"**>****<****LinearLayout**xmlns:android="http://schemas.android.com/apk/res/android"
2. android:layout\_width="fill\_parent"
3. android:layout\_height="fill\_parent"
4. android:orientation="horizontal"**>**
5. 
6. **<****TextView**
7. android:id="@+id/item\_tv"
8. android:textSize="18sp"
9. android:layout\_width="0dp"
10. android:layout\_height="wrap\_content"
11. android:layout\_weight="1"
12. android:gravity="center\_vertical"**/>**
13. **<****CheckBox**
14. android:id="@+id/item\_cb"
15. android:layout\_width="wrap\_content"
16. android:layout\_height="wrap\_content"
17. android:focusable="false"
18. android:clickable="false"
19. android:focusableInTouchMode="false"
20. android:gravity="center\_vertical"**/>**
21. 
22. **</****LinearLayout****>****</****span****>**

MainActivity.java

**\[java\]** [view plain][] [copy][view plain]

1. **public****class** MainActivity **extends** Activity \{ 
2. **private****static****final** String TAG = "MainActivity"; 
3. **private** ListView listView; 
4. **private** ArrayList<String> groups; 
5. @Override
6. **public****void** onCreate(Bundle savedInstanceState) \{ 
7. **super**.onCreate(savedInstanceState); 
8. setContentView(R.layout.main); 
9. listView = (ListView) **this**.findViewById(R.id.list); 
10. groups = **new** ArrayList<String>(); 
11. groups.add("11"); 
12. groups.add("22"); 
13. groups.add("33"); 
14. groups.add("44"); 
15. groups.add("55"); 
16. groups.add("66"); 
17. groups.add("77"); 
18. GroupAdapter adapter = **new** GroupAdapter(**this**,groups); 
19. listView.setAdapter(adapter); 
20. listView.setOnItemClickListener(listItemClickListener); 
21. OnItemClickListener listItemClickListener=**new** OnItemClickListener() \{ 
22. 
23. @Override
24. **public****void** onItemClick(AdapterView<?> parent, View view, **int** position, 
25. **long** id) \{ 
26. 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤 
27. ViewHolder viewHolder=(ViewHolder)view.getTag(); 
28. viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中
29. \} 
30. \}; 
31. \} 
32. \}

GroupAdapter.java

**\[java\]** [view plain][] [copy][view plain]

1. **public****class** GroupAdapter **extends** BaseAdapter \{ 
2. **private** Activity activity;//上下文
3. **private** ArrayList<String> list; 
4. 
5. **private** LayoutInflater inflater=**null**;//导入布局
6. **private****int** temp=-1; 
7. 
8. **public** GroupAdapter(Activity context, ArrayList<String> list) \{ 
9. **this**.activity = context; 
10. **this**.list = list; 
11. inflater=LayoutInflater.from(context); 
12. 
13. \} 
14. 
15. @Override
16. **public****int** getCount() \{ 
17. **return** list.size(); 
18. \} 
19. 
20. @Override
21. **public** Object getItem(**int** position) \{ 
22. 
23. **return** list.get(position); 
24. \} 
25. 
26. @Override
27. **public****long** getItemId(**int** position) \{ 
28. // TODO Auto-generated method stub
29. **return** position; 
30. \} 
31. //listview每显示一行数据,该函数就执行一次
32. @Override
33. **public** View getView(**int** position, View convertView, ViewGroup parent) \{ 
34. ViewHolder holder=**null**; 
35. **if** (convertView==**null**) \{ //当第一次加载ListView控件时 convertView为空
36. convertView=inflater.inflate(R.layout.group\_item\_view, **null**);//所以当ListView控件没有滑动时都会执行这条语句
37. holder=**new** ViewHolder(); 
38. holder.tv=(TextView)convertView.findViewById(R.id.item\_tv); 
39. holder.cb=(CheckBox)convertView.findViewById(R.id.item\_cb); 
40. convertView.setTag(holder);//为view设置标签
41. 
42. \} 
43. **else**\{ //取出holder
44. holder=(ViewHolder) convertView.getTag();//the Object stored in this view as a tag
45. \} 
46. //设置list的textview显示
47. holder.tv.setTextColor(Color.WHITE); 
48. holder.tv.setText(list.get(position)); 
49. // 根据isSelected来设置checkbox的选中状况
50. 
51. holder.cb.setId(position);//对checkbox的id进行重新设置为当前的position
52. holder.cb.setOnCheckedChangeListener(**new** OnCheckedChangeListener() \{ 
53. //把上次被选中的checkbox设为false
54. @Override
55. **public****void** onCheckedChanged(CompoundButton buttonView, **boolean** isChecked) \{ 
56. **if**(isChecked)\{ //实现checkbox的单选功能,同样适用于radiobutton
57. **if**(temp!=-1)\{ 
58. //找到上次点击的checkbox,并把它设置为false,对重新选择时可以将以前的关掉
59. CheckBox tempCheckBox=(CheckBox)activity.findViewById(temp); 
60. **if**(tempCheckBox!=**null**) 
61. tempCheckBox.setChecked(**false**); 
62. \} 
63. temp=buttonView.getId();//保存当前选中的checkbox的id值 
64. \} 
65. \} 
66. \}); 
67. //System.out.println("temp:"+temp);
68. //System.out.println("position:"+position);
69. **if**(position==temp)//比对position和当前的temp是否一致
70. holder.cb.setChecked(**true**); 
71. **else**
72. holder.cb.setChecked(**false**); 
73. **return** convertView; 
74. \} 
75. **static****class** ViewHolder \{ 
76. TextView tv; 
77. CheckBox cb; 
78. \} 
79. \}

listview checkbox实现多选框

MainAcitvity.java

**\[java\]** [view plain][] [copy][view plain]

GroupAdapter.java

**\[java\]** [view plain][] [copy][view plain]

1. **public****class** GroupAdapter **extends** BaseAdapter \{ 
2. **private** Context context;//上下文
3. **private** ArrayList<String> list; 
4. //控制CheckBox选中情况
5. **private****static** HashMap<Integer,Boolean> isSelected; 
6. **private** LayoutInflater inflater=**null**;//导入布局
7. 
8. 
9. **public** GroupAdapter(Context context, ArrayList<String> list) \{ 
10. **this**.context = context; 
11. **this**.list = list; 
12. inflater=LayoutInflater.from(context); 
13. isSelected=**new** HashMap<Integer, Boolean>(); 
14. initData(); 
15. \} 
16. **private****void** initData()\{ //初始化isSelected的数据
17. **for**(**int** i=0;i<list.size();i++)\{ 
18. getIsSelected().put(i,**false**); 
19. 
20. \} 
21. \} 
22. 
23. @Override
24. **public****int** getCount() \{ 
25. **return** list.size(); 
26. \} 
27. 
28. @Override
29. **public** Object getItem(**int** position) \{ 
30. 
31. **return** list.get(position); 
32. \} 
33. 
34. @Override
35. **public****long** getItemId(**int** position) \{ 
36. // TODO Auto-generated method stub
37. **return** position; 
38. \} 
39. //listview每显示一行数据,该函数就执行一次
40. @Override
41. **public** View getView(**int** position, View convertView, ViewGroup parent) \{ 
42. ViewHolder holder=**null**; 
43. **if** (convertView==**null**) \{ //当第一次加载ListView控件时 convertView为空
44. convertView=inflater.inflate(R.layout.group\_item\_view, **null**);//所以当ListView控件没有滑动时都会执行这条语句
45. holder=**new** ViewHolder(); 
46. holder.tv=(TextView)convertView.findViewById(R.id.item\_tv); 
47. holder.cb=(CheckBox)convertView.findViewById(R.id.item\_cb); 
48. convertView.setTag(holder);//为view设置标签
49. 
50. \} 
51. **else**\{ //取出holder
52. holder=(ViewHolder) convertView.getTag();//the Object stored in this view as a tag
53. \} 
54. //设置list的textview显示
55. holder.tv.setTextColor(Color.WHITE); 
56. holder.tv.setText(list.get(position)); 
57. // 根据isSelected来设置checkbox的选中状况
58. holder.cb.setChecked(getIsSelected().get(position)); 
59. **return** convertView; 
60. \} 
61. **static****class** ViewHolder \{ 
62. TextView tv; 
63. CheckBox cb; 
64. \} 
65. **public****static** HashMap<Integer, Boolean>getIsSelected()\{ 
66. **return** isSelected; 
67. \} 
68. **public****static****void** setIsSelected(HashMap<Integer, Boolean> isSelected)\{ 
69. GroupAdapter.isSelected=isSelected; 
70. \} 
71. 
72. \}

其中,getview负责显示每一行listview item,每显示一行就执行一次getview,

若要单选,必须保存当前选中的checkbox的position值,与listview 的每一个item的position进行比较,相同时才设置checkbox ischeck=true;

只有checkbox的setOnCheckChangeListener可以做到这点,保存上一次点击的position值,对checkbox的id值重新设置.temp保存该id值.

getview负责显示数据,onitemselectedlistener负责发送消息,提取数据,处理数据

[源码下载][Link 1]  
参考:[http://blog.csdn.net/notice520/article/details/7266896][http_blog.csdn.net_notice520_article_details_7266896]

[http://blog.csdn.net/jdsjlzx/article/details/6969405][http_blog.csdn.net_jdsjlzx_article_details_6969405]

[http://www.devdiv.com/forum.php?mod=viewthread&tid=85251][http_www.devdiv.com_forum.php_mod_viewthread_tid_85251]

[view plain]: http://blog.csdn.net/lilysea2012/article/details/8816248?utm_source=tuicool&utm_medium=referral#
[Link 1]: http://download.csdn.net/detail/onceing/9443779
[http_blog.csdn.net_notice520_article_details_7266896]: http://blog.csdn.net/notice520/article/details/7266896
[http_blog.csdn.net_jdsjlzx_article_details_6969405]: http://blog.csdn.net/jdsjlzx/article/details/6969405
[http_www.devdiv.com_forum.php_mod_viewthread_tid_85251]: http://www.devdiv.com/forum.php?mod=viewthread&tid=85251