学步园

main.xml源代码如下，本身是个GirdView，用于装载Item： 

<?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:horizontalSpacing="10dp" 
  android:verticalSpacing="10dp" 
  android:columnWidth="90dp" 
  android:stretchMode="columnWidth" 
  android:gravity="center"></GridView> 

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 meunitem.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_width="fill_parent" 
android:layout_height="wrap_content" 
> 
<ImageView  android:layout_width="wrap_content" 
    android:id="@+id/ItemImage" 
    android:layout_height="wrap_content" 
    android:layout_centerHorizontal="true"/> 
<TextView   android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_below="@+id/ItemImage" 
android:id="@+id/ItemText" 
android:layout_centerHorizontal="true" 
/> 
</RelativeLayout> 

最后是JAVA的源代码 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.mainmenu); 

GridView gridview = (GridView) findViewById(R.id.GridView); 
ArrayList<HashMap<String, Object>> meumList = new ArrayList<HashMap<String, Object>>(); 

for(int i = 1;i < 10;i++) { 
HashMap<String, Object> map = new HashMap<String, Object>(); 
map.put("ItemImage", R.drawable.icon); 
map.put("ItemText", "NO."+i); 
meumList.add(map); 
} 

SimpleAdapter saMenuItem = new SimpleAdapter(this, 
  meumList, //数据源 
  R.layout.menuitem, //xml实现 
  new String[]{"ItemImage","ItemText"}, //对应map的Key 
  new int[]{R.id.ItemImage,R.id.ItemText});  //对应R的Id 

//添加Item到网格中 
gridview.setAdapter(saMenuItem); 
gridview.setOnItemClickListener(new OnItemClickListener() { 
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) { 
                                        System.out.println("click index:"+arg2); 
} 
} 
); 
} 
  
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