android GridView 用法

转自：http://blog.sina.com.cn/s/blog_55afbecd0100zlv7.html

1. GridView的xml描述

<?xml version="1.0" encoding="utf-8"?> <GridViewandroid:id="@+id/gridView1"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_weight="1"android:verticalSpacing="10dip" android:horizontalSpacing="10dip" android:gravity="center" android:numColumns="4" ></GridView>

某些属性描述：
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。


2. GridView的子项描述：
grid_item.xml，这个XML跟描述每个gridview子项：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="wrap_content" android:layout_width="match_parent"android:paddingBottom="4dip" > <ImageView android:layout_height="100dip" android:layout_width="wrap_content" android:layout_centerHorizontal="true"android:id="@+id/ItemImage"> </ImageView> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="TextView01"android:layout_centerHorizontal="true" android:layout_below="@+id/ItemImage" android:id="@+id/ItemText"> </TextView></RelativeLayout>

3. Activity中的代码

//Activity.onCreate构建gridprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);//setContentView(R.layout.home);mInflater = LayoutInflater.from(this);mMyView = mInflater.inflate(R.layout.home, null);setContentView(mMyView);mGrid = (GridView) mMyView.findViewById(R.id.gridView1);//1. 生成动态数组ArrayList<HashMap<String, Object>> lstGridItem = new ArrayList<HashMap<String, Object>>(); for(int i=0; i<sIconArray.length ;i++) { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("ItemImage", sIconArray[i]);//添加图像资源的ID map.put("ItemText", "NO."+String.valueOf(i));//按序号做ItemText lstGridItem.add(map); } //2. 生成SimpleAdapter适配器SimpleAdapter saImageItems = new SimpleAdapter(this,lstGridItem,//数据来源 R.layout.grid_item,//grid_item的XML实现 //map中使用的key值列表new String[] {"ItemImage", "ItemText"}, //grid_Item.xml文件中每个item的UI元素ID new int[] {R.id.ItemImage, R.id.ItemText});mGrid.setAdapter(saImageItems);//3. 设置listenermGrid.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"));}}