android GridView 的使用

android GridView 的使用

如果是这样子的话就看源码吧：
gridview.xml

Xml代码

<?xmlversion="1.0"encoding="utf-8"?>
<GridViewxmlns: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"
/>

item.xml

Xml代码

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

activity

Java代码

packagecom.test;
importjava.util.ArrayList;
importjava.util.HashMap;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.AdapterView;
importandroid.widget.AdapterView.OnItemClickListener;
importandroid.widget.GridView;
importandroid.widget.SimpleAdapter;
publicclassTestGridViewextendsActivity{
privateGridViewgridview;
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.gridview);
gridview=(GridView)findViewById(R.id.gridview);
//生成动态数组，并且转入数据
ArrayList<HashMap<String,Object>>lstImageItem=newArrayList<HashMap<String,Object>>();
for(inti=0;i<10;i++){
HashMap<String,Object>map=newHashMap<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
SimpleAdaptersaImageItems=newSimpleAdapter(this,//没什么解释
lstImageItem,//数据来源
R.layout.item,//night_item的XML实现
//动态数组与ImageItem对应的子项
newString[]{"ItemImage","ItemText"},
//ImageItem的XML文件里面的一个ImageView,两个TextViewID
newint[]{R.id.ItemImage,R.id.ItemText});
//添加并且显示
gridview.setAdapter(saImageItems);
//添加消息处理
gridview.setOnItemClickListener(newItemClickListener());
}
//当AdapterView被单击(触摸屏或者键盘)，则返回的Item单击事件
classItemClickListenerimplementsOnItemClickListener{
publicvoidonItemClick(AdapterView<?>arg0,//TheAdapterViewwheretheclickhappened
Viewarg1,//TheviewwithintheAdapterViewthatwasclicked
intarg2,//Thepositionoftheviewintheadapter
longarg3//Therowidoftheitemthatwasclicked
){
//在本例中arg2=arg3
@SuppressWarnings("unchecked")
HashMap<String,Object>item=(HashMap<String,Object>)arg0.getItemAtPosition(arg2);
//显示所选Item的ItemText
setTitle((String)item.get("ItemText"));
}
}
}

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