当前位置： 代码迷 >> Android >> android之Listview的分组兑现
  详细解决方案

android之Listview的分组兑现

热度：148   发布时间：2016-05-01 12:03:05.0
android之Listview的分组实现

?

对于Listview的分组我们再熟悉不过了，因为Android自带的通讯录中的联系人信息就是使用的ListView分组，最近项目中用到了这个功能。所以趁着周末有时间，也更新下一篇这样的博客，希望对大家能够有帮助。

?????? 其实对于分组的ListView和我们平时用的ListView没有多大差别，就是需要在适配器中的getView方法中做下判断。只要理解了这个，下面就好说了，下面我们看下实现代码。

?????? 首先是main.xml布局：

?

[html]?view plaincopy
  1. <?xml?version="1.0"?encoding="utf-8"?>??
  2. <LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??
  3. ????android:layout_width="fill_parent"??
  4. ????android:layout_height="fill_parent"??
  5. ????android:background="#ffffff"??
  6. ????android:orientation="vertical"?>??
  7. ??
  8. ????<ListView??
  9. ????????android:id="@+id/listView_list"??
  10. ????????android:layout_width="match_parent"??
  11. ????????android:layout_height="wrap_content"?>??
  12. ????</ListView>??
  13. ??
  14. </LinearLayout>??

????? 因为listview要加载两种不同的item，所以要实现两个item布局，addexam_list_item.xml：

?

?

[html]?view plaincopy
  1. <?xml?version="1.0"?encoding="utf-8"?>??
  2. <LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??
  3. ????android:layout_width="fill_parent"??
  4. ????android:layout_height="wrap_content"??
  5. ????android:orientation="horizontal"???
  6. ????android:padding="5dip">??
  7. ??????
  8. ??<ImageView??
  9. ???????android:id="@+id/addexam_list_icon"??
  10. ???????android:background="@drawable/ic_launcher"??
  11. ???????android:layout_width="wrap_content"??
  12. ???????android:layout_height="wrap_content"/>??
  13. ????<TextView??
  14. ???????android:id="@+id/addexam_list_item_text"??
  15. ???????android:layout_width="wrap_content"??
  16. ???????android:layout_height="wrap_content"??
  17. ???????android:layout_gravity="center"??
  18. ???????android:layout_marginLeft="10dp"??
  19. ???????android:text="测试数据"/>??
  20. </LinearLayout>??

???? 分组标签对应的布局addexam_list_item_tag.xml

?

?

[html]?view plaincopy
  1. <?xml?version="1.0"?encoding="utf-8"?>??
  2. <LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??
  3. ????android:layout_width="fill_parent"??
  4. ????android:layout_height="wrap_content"??
  5. ????android:background="#666666"??
  6. ????android:paddingLeft="10dp"??
  7. ????android:gravity="center_vertical"??
  8. ????android:orientation="vertical"?>??
  9. ??????
  10. ?<TextView??
  11. ???????android:id="@+id/addexam_list_item_text"??
  12. ???????android:layout_width="wrap_content"??
  13. ???????android:layout_height="20dip"??
  14. ???????android:textColor="#ffffff"??
  15. ???????android:text="金融考试"??
  16. ???????android:gravity="center_vertical"/>??
  17. </LinearLayout>??

?? 布局文件我们已经实现了，下面看下在程序中我们是怎么处理的吧！

?

?

[html]?view plaincopy
  1. public?class?TestActivity?extends?Activity?{??
  2. ????/**?Called?when?the?activity?is?first?created.?*/??
  3. ????private?List<String>??list=null;??
  4. ????private?List<String>?groupkey=new?ArrayList<String>();??
  5. ?????private?List<String>?aList?=?new?ArrayList<String>();??
  6. ??????private?List<String>?bList?=?new?ArrayList<String>();??
  7. ????private?ListView?listview;??
  8. [email protected]
  9. ????public?void?onCreate(Bundle?savedInstanceState)?{??
  10. ????????super.onCreate(savedInstanceState);??
  11. ????????setContentView(R.layout.main);??
  12. ??????????
  13. ????????listview=(ListView)?findViewById(R.id.listView_list);??
  14. ????????initData();??
  15. ????????MyAdapter?adapter=new?MyAdapter();??
  16. ????????listview.setAdapter(adapter);??
  17. ??????????
  18. ????}??
  19. ????public?void?initData(){??
  20. ????????list?=?new?ArrayList<String>();??
  21. ??????????
  22. ????????groupkey.add("A组");??
  23. ????????groupkey.add("B组");??
  24. ??????????
  25. ????????for(int?i=0;?i<5;?i++){??
  26. ????????????aList.add("A组"+i);??
  27. ????????}??
  28. ????????list.add("A组");??
  29. ????????list.addAll(aList);??
  30. ??????????
  31. ????????for(int?i=0;?i<8;?i++){??
  32. ????????????bList.add("B组"+i);??
  33. ????????}??
  34. ????????list.add("B组");??
  35. ????????list.addAll(bList);??
  36. ????}??
  37. ??????
  38. ????private?class?MyAdapter?extends?BaseAdapter{??
  39. ??
  40. [email protected]
  41. ????????public?int?getCount()?{??
  42. ????????????//?TODO?Auto-generated?method?stub??
  43. ????????????return?list.size();??
  44. ????????}??
  45. ??
  46. [email protected]
  47. ????????public?Object?getItem(int?position)?{??
  48. ????????????//?TODO?Auto-generated?method?stub??
  49. ????????????return?list.get(position);??
  50. ????????}??
  51. ??
  52. [email protected]
  53. ????????public?long?getItemId(int?position)?{??
  54. ????????????//?TODO?Auto-generated?method?stub??
  55. ????????????return?position;??
  56. ????????}??
  57. [email protected]
  58. ????????public?boolean?isEnabled(int?position)?{??
  59. ????????????//?TODO?Auto-generated?method?stub??
  60. ?????????????if(groupkey.contains(getItem(position))){??
  61. ?????????????????return?false;??
  62. ?????????????}??
  63. ?????????????return?super.isEnabled(position);??
  64. ????????}??
  65. [email protected]
  66. ????????public?View?getView(int?position,?View?convertView,?ViewGroup?parent)?{??
  67. ????????????//?TODO?Auto-generated?method?stub??
  68. ????????????View?view=convertView;??
  69. ????????????if(groupkey.contains(getItem(position))){??
  70. ????????????????view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item_tag,?null);??
  71. ????????????}else{??
  72. ????????????????view=LayoutInflater.from(getApplicationContext()).inflate(R.layout.addexam_list_item,?null);??
  73. ????????????}??
  74. ????????????TextView?text=(TextView)?view.findViewById(R.id.addexam_list_item_text);??
  75. ????????????text.setText((CharSequence)?getItem(position));??
  76. ????????????return?view;??
  77. ????????}??
  78. ??????????
  79. ????}??
  80. }??

?? 代码好像挺简单，更我们平时使用lsitview也没多大区别，下面看看能不能实现呢

?

??? 运行一下：

???

?

  相关解决方案

代码迷 - 您身边的软件异常，代码异常，编程异常助手（发现，解决，分享）
Copyright © 2009-2013 DAIMAMI.COM. All rights reserved.