SimpleAdapter的使用

android中为我们提供了3种adapter来为各种各样的list来适配数据，其ArrayAdapter 对只有纯字符列表的list适应，如果遇到list的每个item都有添加几项的情况，如下图，有头像，名字，作品，人气等，那么ArrayAdapter就不是适用了，就可以使用SimpleAdapter 了，而baseAdapter 用起来对初学者有点难，建议使用simpleAdapter。首先来看整体的布局文件：

<?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" >

    <TextView
        style="?android:attr/textAppearanceLarge"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="@string/tab_author" />

    <ListView
        android:id="@+id/author_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:scrollbars="none">
    </ListView>

</LinearLayout>

其中定义了一个列表的标题，下面定义了一个列表，列表中的scroolbars=“none”是隐藏滚动条。接下来就要为每个item设置布局了，分别有头像，作者，作品，人气。

<?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="wrap_content"
    android:background="#FFFFFFFF"
    android:orientation="vertical" >

    <View
        android:layout_width="match_parent"
        android:layout_height="7dp"
        android:background="#FFdddddd" >
    </View>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/list_item_author_touxiang"
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_margin="10dp"
            android:src="@drawable/icon_stub" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginBottom="10dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="10dp"
            android:orientation="vertical" >

            <TextView
                android:id="@+id/list_item_author"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:text="作者" 
                android:textSize="18sp"/>

            <TextView
                android:id="@+id/list_item_author_zuopin"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:gravity="bottom"
                android:text="作品:"
                android:textColor="#FF777777" />

            <TextView
                android:id="@+id/list_item_author_renqi"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:gravity="bottom"
                android:text="人气:"
                android:textColor="#FF777777" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

然后我们就可以在java代码中编写程序，来实现一个漂亮的列表；

public class AuthorListFragment extends Fragment {

	private ListView listView;
	private View authorList;
	private String[] authors = {"周杰伦","王力宏","郭敬明",
								"周杰伦","王力宏","郭敬明",
								"周杰伦","王力宏","郭敬明"};
	private String[] zuopin = {"《搞笑》《东风破》","《落叶归根》","《围城》《小时代》",
								"《搞笑》《东风破》","《落叶归根》","《围城》《小时代》",
								"《搞笑》《东风破》","《落叶归根》","《围城》《小时代》"};
	private String[] renqi = {"9999","12345","98687","9999","12345","98687","9999","12345","98687"};
	private int[] touxiang = {R.drawable.zhoujielun,R.drawable.wanglihong,R.drawable.guojingm,
							  R.drawable.zhoujielun,R.drawable.wanglihong,R.drawable.guojingm,
							  R.drawable.zhoujielun,R.drawable.wanglihong,R.drawable.guojingm};
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		authorList = inflater.inflate(R.layout.author_list, container,false);
		viewHolder();
		List<HashMap<String,Object>> data = new ArrayList<HashMap<String,Object>>();  
        for(int i = 0; i < authors.length; i++){  
            HashMap<String,Object> map = new HashMap<String,Object>();  
            map.put("touxiang", touxiang[i]);
            map.put("name", authors[i]);  
            map.put("zuopin", "作品："+zuopin[i]);  
            map.put("renqi", "人气："+renqi[i]);  
            data.add(map); 
        }
        
        SimpleAdapter adapter = new SimpleAdapter(getActivity(), data, R.layout.author_list_item, new String[]{"touxiang","name","zuopin","renqi"}, 
        		  new int[]{R.id.list_item_author_touxiang,
        	                R.id.list_item_author,
        	                R.id.list_item_author_zuopin,
        	                R.id.list_item_author_renqi});
        
        listView.setAdapter(adapter);
		return authorList;
	}

	private void viewHolder() {
		listView = (ListView) authorList.findViewById(R.id.author_list);
	}
	
}

我这是在一个fragment里面实现的，大家可以在Activity里面试试，都是能 行的。我在真机上面运行的，我截个图给大家看看：



到此为止，simpleadapter就能实现很漂亮的列表界面。 祝大家开开兴兴，每天进步一点！88