listView 添加多个不同的adapter - 军军小站|张军博客

有时候我们想在listView上分类，或者呢有时候一行显示两列内容，有时候需要三列内容，那怎么实现呢，这里呢就要使用

Java代码

class Section{
Stringcaption;
Adapteradapter;
Section(Stringcaption,Adapteradapter){
this .caption=caption;
this .adapter=adapter;
}
}

自定义一个类，这个类呢包含多个adapter就可以了，想用那种就用那种。

Java代码

abstract public class SectionedAdapter extends BaseAdapter{
abstract protected ViewgetHeaderView(Stringcaption, int index,ViewconvertView,ViewGroupparent);
private List<Section>sections= new ArrayList<Section>();
private static int TYPE_SECTION_HEADER= 0 ;
public SectionedAdapter(){
super ();
}
public void addSection(Stringcaption,Adapteradapter){
sections.add( new Section(caption,adapter));
}
public ObjectgetItem( int position){
for (Sectionsection: 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 (Sectionsection: this .sections){
total+=section.adapter.getCount()+ 1 ; //addoneforheader
}
return (total);
}
public int getViewTypeCount(){
int total= 1 ; //onefortheheader,plusthosefromsections
for (Sectionsection: this .sections){
total+=section.adapter.getViewTypeCount();
}
return (total);
}
public int getItemViewType( int position){
int typeOffset=TYPE_SECTION_HEADER+ 1 ; //startcountingfromhere
for (Sectionsection: this .sections){
if (position== 0 ){
return (TYPE_SECTION_HEADER);
}
int size=section.adapter.getCount()+ 1 ;
if (position<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 ViewgetView( int position,ViewconvertView,
ViewGroupparent){
int sectionIndex= 0 ;
for (Sectionsection: this .sections){
if (position== 0 ){
return (getHeaderView(section.caption,sectionIndex,convertView,parent));
}
int size=section.adapter.getCount()+ 1 ;
if (position<size){
return (section.adapter.getView(position- 1 ,convertView,parent));
}
position-=size;
sectionIndex++;
}
return ( null );
}
@Override
public long getItemId( int position){
return (position);
}
class Section{
Stringcaption;
Adapteradapter;
Section(Stringcaption,Adapteradapter){
this .caption=caption;
this .adapter=adapter;
}
}
}

然后主类就是

Java代码

public class SectionedDemo extends ListActivity{
private static String[]items={ "lorem" , "ipsum" , "dolor" , "purus" };
@Override
public void onCreate(Bundleicicle){
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);
}
SectionedAdapteradapter= new SectionedAdapter(){
protected ViewgetHeaderView(Stringcaption, int index,ViewconvertView,ViewGroupparent){
TextViewresult=(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变化了，我这里只是吧内容打乱。

有些东西我只是简单调解没有源码或者我认为很简单的就不提供了。

listView 添加多个不同的adapter

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