package com.example.imooc_gridview;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.os.Bundle;

import android.widget.GridView;

import android.widget.SimpleAdapter;

import android.app.Activity;

public class MainActivity extends Activity {

//在开始声明后，须要方法内进行初始化

private GridView gridView;

private List<Map<String, Object>> dataList;

private SimpleAdapter simpleAdapter;

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 = { "联系人", "日历", "相机", "闹钟", "游戏", "消息", "铃声",

"设置", "语音", "天气", "浏览器", "youtube" };

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

/*

* 1.准备数据源 2.添加适配器 3.GridView加载适配器(SimpleAdapter)

* 4.GridView设置监听事件(OnItemClickListener)

*/

//准备数据源

dataList = new ArrayList<Map<String, Object>>();

gridView = (GridView) findViewById(R.id.gridView);

 //新建适配器

new SimpleAdapter(this, getData(), R.layout.item_main, new String[] {

"ImageView", "TextView" }, new int[] { R.id.ImageView,

R.id.TextView });

//加载适配器到GridView

gridView.setAdapter(simpleAdapter);

}

private List<Map<String, Object>> getData() {

for (int i = 0; i < icon.length; i++) {

Map<String, Object> map = new HashMap<String, Object>();

map.put("ImageView", icon[i]);

map.put("TextView", iconName[i]);

dataList.add(map);

}

return dataList;

}

}

为什么我的模拟器什么也没有显示？什么原因？