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Android适配器Adapter学习

 

在开发中我们需要绑定一些数据展现到桌面上,这是就需要AdapterView。AdapterView是ViewGroup的子类,它决定了怎么展现视图通过Adapter来绑定特殊的数据类型。AdapterView是非常有帮助的当你展现数据在你的布局中。Gallery,ListView和Spinner是AdapterView的子类。

 

      下面看一下AdapterView的结构图:

      \     

 

 

      然后再看一下Adapter的结构图:

 

    \

 

    上面已经充分展现了他们的子类和父类的基础关系。

 

     下面我们看一个ListViewDemo的例子:

 

    先来看一个简单的adapter的例子:

 

  

 

 

public class SimpleList extends ListActivity { 

    private String[] mListString={"姓名:王魁锋","性别:男","年龄:23", 

            "居住地:上海市普陀区","邮箱:wangkuifeng0118@126.com"}; 

    private ListView mListView=null; 

    @Override 

    protected void onCreate(Bundle savedInstanceState) { 

        // TODO Auto-generated method stub 

        super.onCreate(savedInstanceState); 

        mListView=this.getListView(); 

        setListAdapter(new ArrayAdapter<String>(this, 

            android.R.layout.易做图_list_item_1,mListString)); 

        mListView.setOnItemClickListener(new OnItemClickListener() { 

 

            @Override 

            public void onItemClick(AdapterView<?> parent, View view, 

                    int position, long id) { 

                // TODO Auto-generated method stub 

            Toast.makeText(SimpleList.this, "你选择了:"+mListString[position], 1).show(); 

            } 

        }); 

    } 

 

  这里用到了系统定义好的适配模式,当然这只能用来简单的数据适配,下面看一下效果:

     \

 

    接下来看一个稍微复杂点的,SimpleAdapter怎么适配:

 

  

 

 

public class IconList extends ListActivity { 

 

     private String[] mListTitle = { "姓名", "性别", "年龄", "居住地","邮箱"};   

        private String[] mListStr = { "王魁锋", "男", "23", "上海市普陀区",   

            "wangkuifeng0118@126.com"};   

        ListView mListView = null;   

        ArrayList<Map<String,Object>> mData= new ArrayList<Map<String,Object>>();;   

       

        @Override 

        protected void onCreate(Bundle savedInstanceState) { 

            // TODO Auto-generated method stub 

             mListView = getListView();   

                 

            int lengh = mListTitle.length;   

            for(int i =0; i < lengh; i++) {   

                Map<String,Object> item = new HashMap<String,Object>();   

                item.put("image", R.drawable.portrait);   

                item.put("title", mListTitle[i]);   

                item.put("text", mListStr[i]);   

                mData.add(item);    

            }   

            SimpleAdapter adapter = new SimpleAdapter(this,mData,R.layout.iconlist,   

                new String[]{"image","title","text"},new int[]{R.id.image,R.id.title,R.id.text});    

                setListAdapter(adapter);   

            mListView.setOnItemClickListener(new OnItemClickListener() {   

                @Override 

                public void onItemClick(AdapterView<?> parent, View view, 

                        int position, long id) { 

                    // TODO Auto-generated method stub 

               &

补充:移动开发 , Android ,
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