android中GridView的用法示例

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android" 
  android:id="@+id/gridview"
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"
  android:numColumns="auto_fit"
  android:verticalSpacing="10dp"
  android:horizontalSpacing="10dp"
  android:columnWidth="90dp"
  android:stretchMode="columnWidth"
  android:gravity="center"
/>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_height="wrap_content" 
     android:paddingBottom="4dip" android:layout_width="fill_parent">
     <ImageView 
        android:layout_height="wrap_content" 
        android:id="@+id/ItemImage" 
        android:layout_width="wrap_content" 
        android:layout_centerHorizontal="true"> 
     </ImageView>
     <TextView 
        android:layout_width="wrap_content" 
        android:layout_below="@+id/ItemImage" 
        android:layout_height="wrap_content" 
        android:text="TextView01" 
        android:layout_centerHorizontal="true" 
        android:id="@+id/ItemText">
     </TextView>
</RelativeLayout>

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);

//生成动态数组，并且转入数据
ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();
for(int i=0;i<10;i++)
{
 HashMap<String, Object> map = new HashMap<String, Object>();
 map.put("ItemImage", R.drawable.icon);//添加图像资源的ID
 map.put("ItemText", "NO."+String.valueOf(i));//按序号做ItemText
 lstImageItem.add(map);
}
//生成适配器的ImageItem <====> 动态数组的元素，两者一一对应
SimpleAdapter saImageItems = new SimpleAdapter(this, //没什么解释
     lstImageItem,//数据来源 
     R.layout.night_item,//night_item的XML实现
     
     //动态数组与ImageItem对应的子项    
     new String[] {"ItemImage","ItemText"}, 
     
     //ImageItem的XML文件里面的一个ImageView,两个TextView ID
     new int[] {R.id.ItemImage,R.id.ItemText});
//添加并且显示
gridview.setAdapter(saImageItems);
//添加消息处理
gridview.setOnItemClickListener(new ItemClickListener());
}

//当AdapterView被单击(触摸屏或者键盘)，则返回的Item单击事件
class ItemClickListener implements OnItemClickListener
{
 public void onItemClick(AdapterView<?> arg0,//The AdapterView where the click happened 
    View arg1,//The view within the AdapterView that was clicked
    int arg2,//The position of the view in the adapter
    long arg3//The row id of the item that was clicked
    ) {
 //在本例中arg2=arg3
 HashMap<String, Object> item=(HashMap<String, Object>) arg0.getItemAtPosition(arg2);
 //显示所选Item的ItemText
 setTitle((String)item.get("ItemText"));
 }
}