Android程序:GridView的应用（仿桌面图标排列并设置点击事件）

public class MainActivity extends Activity implements OnItemClickListener {

private GridView gridView;
private List<Map<String, Object>> dataList;
private int[] icon = { R.drawable.address_book, R.drawable.calendar,
R.drawable.camera, R.drawable.clock, R.drawable.games_control,
R.drawable.messenger, R.drawable.ringtone, R.drawable.settings,
R.drawable.speech_balloon, R.drawable.weather, R.drawable.world,
R.drawable.youtube };
private String[] iconName = { "通讯录", "日历", "相机", "时钟", "游戏", "短信", "铃声",
"设置", "语音", "天气", "浏览器", "视频" };
private SimpleAdapter simpleAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
gridView = (GridView) findViewById(R.id.gridView);
// 1.准备数据源

dataList = new ArrayList<Map<String, Object>>();
// 2.新建适配器（SimpleAdapter）
// SimpleAdapter(context, data, resource, from, to)
// SimpleAdapter(上下文（this）, 数据源, 布局文件, 自己取的名字要与后面的一一对应, 对应布局中的id)
simpleAdapter = new SimpleAdapter(this, getData(), R.layout.item,
new String[] { "image", "text" }, new int[] { R.id.imageView,
R.id.textView });
// 3.GridView加载适配器
gridView.setAdapter(simpleAdapter);

// 4.GridView配置事件监听器（OnItemClickListener）
gridView.setOnItemClickListener(this);

}

private List<Map<String, Object>> getData() {
//填充数据源
for(int i =0;i<icon.length;i++){
Map<String, Object>map=new HashMap<String, Object>();
map.put("image", icon[i]);
map.put("text", iconName[i]);
dataList.add(map);
}

return dataList;
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//String s=gridView.getItemAtPosition(position)+"";
Toast.makeText(this, "我是"+iconName[position],Toast.LENGTH_SHORT).show();
}

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<!--
android:numColumns="3"  每行显示几列
android:horizontalSpacing="" 两列之间的间距
android:verticalSpacing="" 两行之间的间距

-->

<GridView
android:layout_marginTop="50dp"
android:id="@+id/gridView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:horizontalSpacing="10dp"
android:numColumns="3"
android:verticalSpacing="10dp" >
</GridView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:background="#000000" >

<ImageView
android:id="@+id/imageView"
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/address_book"/>

<TextView
android:layout_marginTop="5dp"
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:text="hellp"/>

</LinearLayout>