ListView之BaseAdapter

BaseAdapter可以实现自定义的丰富子项视图，本文实现如下所示结果：

实现代码：

 /*
 ListView :列表

 BaseAdapter 通用的基础适配器

  *
  * */
 public class BaseAdapter_test extends Activity {

     private ListView listview;
     private int[] images=new int[]{
             R.drawable.s1,
             R.drawable.s2,
             R.drawable.s3,
             R.drawable.s4,
             R.drawable.s5};

     private BaseAdapter adapter;
     private Context context;
     private List<Map<String,Object>> datas;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.baseadapate);
         context = this;
         listview = (ListView) findViewById(R.id.listview);

         initData();

        adapter=new MyAdapter();

         listview.setAdapter(adapter);

         listview.setOnItemClickListener(new OnItemClickListener() {

             @Override
             public void onItemClick(AdapterView<?> parent, View view,
                     int position, long id) {

                 Toast.makeText(context,"你选中的listview是："+ datas.get(position).get("map_content"), ).show();
             }
         });

     }
 //自定义适配器
     private class MyAdapter extends BaseAdapter
     {

     @Override
     public int getCount() {
         // TODO Auto-generated method stub
         return datas.size();
     }

     @Override
     public Object getItem(int position) {
         // TODO Auto-generated method stub
         return datas.get(position);
     }

     @Override
     public long getItemId(int position) {
         // TODO Auto-generated method stub
         return position;
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         // TODO Auto-generated method stub

         ViewHolder viewHolder;
         if(convertView==null)//重用view
         {

                 viewHolder=new ViewHolder();

                 convertView=LayoutInflater.from(context).inflate(R.layout.items, null);
             viewHolder.image=(ImageView) convertView.findViewById(R.id.image);
             viewHolder.content=(TextView)convertView.findViewById(R.id.content);
             viewHolder.button =(Button)convertView.findViewById(R.id.button);
             convertView.setTag(viewHolder);
         }
         else
         {
             viewHolder=(ViewHolder) convertView.getTag();
         }
         //给每一个item中的控件赋值
         final Map mymap=datas.get(position);
         viewHolder.image.setImageBitmap((Bitmap) mymap.get("map_image"));
         viewHolder.content.setText(mymap.get("map_content")+"");
         viewHolder.button.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 Toast.makeText(context, "你选中的adapter是:"+mymap.get("map_content"), ).show();

             }
         });

         return convertView;
     }

     }

     private class ViewHolder
     {
         public ImageView image;
         public TextView content;
         public Button button;

     }
     private void initData() {

         datas = new ArrayList<Map<String,Object>>();
         for(int i=;i<;i++)
         {
             Map<String,Object> map = new HashMap<String, Object>();
             map.put("map_image",BitmapFactory.decodeResource(getResources(), images[i]));
             map.put("map_content", "hahacontent"+i);
             datas.add(map);
         }
     }

 }

baseadapate.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" >

     <ListView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:id="@+id/listview"
         >

     </ListView>

 </LinearLayout>

items.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal"
     android:layout_gravity="center"

     >

     <ImageView
         android:id="@+id/image"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="@drawable/ic_launcher"
         />

     <TextView

         android:id="@+id/content"
         android:layout_width="0px"
         android:layout_height="wrap_content"
         android:layout_weight=""
         android:text="haa" 

         />

     <Button
          android:id="@+id/button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="购买"
         android:focusable="false"
         />
 </LinearLayout>