andorid gridview

main.xml
<?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"   
/>  

介绍一下里面的某些属性：

android:numColumns="auto_fit" ，GridView的列数设置为自动

android:columnWidth="90dp"，每列的宽度，也就是Item的宽度
android:stretchMode="columnWidth"，缩放与列宽大小同步
android:verticalSpacing="10dp"，两行之间的边距，如：行一(NO.0~NO.2)与行二 (NO.3~NO.5)间距为10dp
android:horizontalSpacing="10dp"，两列之间的边距。

 

接下来介绍 night_item.xml，这个XML跟前面 ListView的ImageItem.xml很类似：

<?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>  

java代码：

 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"));   
}   
       
  }