轉：listView 添加多個不同的adapter

有時候我們想在listView上分類，或者呢 有時候一行顯示兩列內容，有時候需要三列內容 ，那怎麼實現呢，這裏呢就要使用

Java代碼

1. class Section {    
2.         String caption;    
3.         Adapter adapter;    
5.         Section(String caption, Adapter adapter) {    
6. this.caption=caption;    
7. this.adapter=adapter;    
8.         }    
9.     }   

class Section { String caption; Adapter adapter; Section(String caption, Adapter adapter) { this.caption=caption; this.adapter=adapter; } }

自定義一個類，這個類呢包含多個adapter就可以了，想用那種就用那種。

Java代碼

1. abstract public class SectionedAdapter extends BaseAdapter {    
2. abstract protected View getHeaderView(String caption,int index,View convertView,ViewGroup parent);    
4. private List<Section> sections=new ArrayList<Section>();    
5. private static int TYPE_SECTION_HEADER=0;    
7. public SectionedAdapter() {    
8. super();    
9.     }    
11. public void addSection(String caption, Adapter adapter) {    
12.         sections.add(new Section(caption, adapter));    
13.     }    
15. public Object getItem(int position) {    
16. for (Section section : this.sections) {    
17. if (position==0) {    
18. return(section);    
19.             }    
21. int size=section.adapter.getCount()+1;    
23. if (position<size) {    
24. return(section.adapter.getItem(position-1));    
25.             }    
27.             position-=size;    
28.         }    
30. return(null);    
31.     }    
33. public int getCount() {    
34. int total=0;    
36. for (Section section : this.sections) {    
37.             total+=section.adapter.getCount()+1; // add one for header  
38.         }    
40. return(total);    
41.     }    
43. public int getViewTypeCount() {    
44. int total=1;    // one for the header, plus those from sections  
46. for (Section section : this.sections) {    
47.             total+=section.adapter.getViewTypeCount();    
48.         }    
50. return(total);    
51.     }    
53. public int getItemViewType(int position) {    
54. int typeOffset=TYPE_SECTION_HEADER+1;   // start counting from here  
56. for (Section section : this.sections) {    
57. if (position==0) {    
58. return(TYPE_SECTION_HEADER);    
59.             }    
61. int size=section.adapter.getCount()+1;    
63. if (position&lt;size) {    
64. return(typeOffset+section.adapter.getItemViewType(position-1));    
65.             }    
67.             position-=size;    
68.             typeOffset+=section.adapter.getViewTypeCount();    
69.         }    
71. return(-1);    
72.     }    
74. public boolean areAllItemsSelectable() {    
75. return(false);    
76.     }    
78. public boolean isEnabled(int position) {    
79. return(getItemViewType(position)!=TYPE_SECTION_HEADER);    
80.     }    
82. @Override
83. public View getView(int position, View convertView,    
84.                                             ViewGroup parent) {    
85. int sectionIndex=0;    
87. for (Section section : this.sections) {    
88. if (position==0) {    
89. return(getHeaderView(section.caption, sectionIndex,convertView, parent));    
90.             }    
92. int size=section.adapter.getCount()+1;    
94. if (position&lt;size) {    
95. return(section.adapter.getView(position-1,  convertView,parent));    
96.             }    
98.             position-=size;    
99.             sectionIndex++;    
100.         }    
102. return(null);    
103.     }    
105. @Override
106. public long getItemId(int position) {    
107. return(position);    
108.     }    
110. class Section {    
111.         String caption;    
112.         Adapter adapter;    
114.         Section(String caption, Adapter adapter) {    
115. this.caption=caption;    
116. this.adapter=adapter;    
117.         }    
118.     }    
119. }  

abstract public class SectionedAdapter extends BaseAdapter { abstract protected View getHeaderView(String caption,int index,View convertView,ViewGroup parent); private List&lt;Section> sections=new ArrayList<Section>(); private static int TYPE_SECTION_HEADER=0; public SectionedAdapter() { super(); } public void addSection(String caption, Adapter adapter) { sections.add(new Section(caption, adapter)); } public Object getItem(int position) { for (Section section : this.sections) { if (position==0) { return(section); } int size=section.adapter.getCount()+1; if (position<size) { return(section.adapter.getItem(position-1)); } position-=size; } return(null); } public int getCount() { int total=0; for (Section section : this.sections) { total+=section.adapter.getCount()+1; // add one for header } return(total); } public int getViewTypeCount() { int total=1; // one for the header, plus those from sections for (Section section : this.sections) { total+=section.adapter.getViewTypeCount(); } return(total); } public int getItemViewType(int position) { int typeOffset=TYPE_SECTION_HEADER+1; // start counting from here for (Section section : this.sections) { if (position==0) { return(TYPE_SECTION_HEADER); } int size=section.adapter.getCount()+1; if (position&lt;size) { return(typeOffset+section.adapter.getItemViewType(position-1)); } position-=size; typeOffset+=section.adapter.getViewTypeCount(); } return(-1); } public boolean areAllItemsSelectable() { return(false); } public boolean isEnabled(int position) { return(getItemViewType(position)!=TYPE_SECTION_HEADER); } @Override public View getView(int position, View convertView, ViewGroup parent) { int sectionIndex=0; for (Section section : this.sections) { if (position==0) { return(getHeaderView(section.caption, sectionIndex,convertView, parent)); } int size=section.adapter.getCount()+1; if (position&lt;size) { return(section.adapter.getView(position-1, convertView,parent)); } position-=size; sectionIndex++; } return(null); } @Override public long getItemId(int position) { return(position); } class Section { String caption; Adapter adapter; Section(String caption, Adapter adapter) { this.caption=caption; this.adapter=adapter; } } }

然後主類就是

Java代碼

1. public class SectionedDemo extends ListActivity {    
2. private static String[] items={"lorem", "ipsum", "dolor","purus"};    
4. @Override
5. public void onCreate(Bundle icicle) {    
6. super.onCreate(icicle);    
7.         setContentView(R.layout.main);    
9.         adapter.addSection("Original",new ArrayAdapter&lt;String>(this,    
10.                                                     android.R.layout.simple_list_item_1,    
11.                                                     items));    
13.         List<String> list=Arrays.asList(items);    
15.         Collections.shuffle(list);    
17.         adapter.addSection("Shuffled",new ArrayAdapter<String>(this,    
18.                                                     android.R.layout.simple_list_item_1,    
19.                                                     list));    
21.         list=Arrays.asList(items);    
23.         Collections.shuffle(list);    
25.         adapter.addSection("Re-shuffled",new ArrayAdapter<String>(this,    
26.                                                     android.R.layout.simple_list_item_1,    
27.                                                     list));    
29.         setListAdapter(adapter);    
30.     }    
32.     SectionedAdapter adapter=new SectionedAdapter() {    
33. protected View getHeaderView(String caption, int index,View convertView,ViewGroup parent) {    
34.             TextView result=(TextView)convertView;    
36. if (convertView==null) {    
37.                 result=(TextView)getLayoutInflater().inflate(R.layout.header, null);    
38.             }    
40.             result.setText(caption);    
42. return(result);    
43.         }    
44.     };    
45. }  

public class SectionedDemo extends ListActivity { private static String[] items={"lorem", "ipsum", "dolor","purus"}; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); adapter.addSection("Original",new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items)); List<String> list=Arrays.asList(items); Collections.shuffle(list); adapter.addSection("Shuffled",new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list)); list=Arrays.asList(items); Collections.shuffle(list); adapter.addSection("Re-shuffled",new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list)); setListAdapter(adapter); } SectionedAdapter adapter=new SectionedAdapter() { protected View getHeaderView(String caption, int index,View convertView,ViewGroup parent) { TextView result=(TextView)convertView; if (convertView==null) { result=(TextView)getLayoutInflater().inflate(R.layout.header, null); } result.setText(caption); return(result); } }; }

其他的就需要你自己變化了，我這裏只是吧內容打亂。

有些東西我只是簡單調解沒有源碼或者我認爲很簡單的就不提供了。

對於複雜一些或者很難說清的 本人表達能力有限會把源碼發上的