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 {

//在開始聲明后，須要方法內(nèi)進(jìn)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 = { "聯(lián)系人", "日歷", "相機(jī)", "鬧鐘", "游戲", "消息", "鈴聲",

"設(shè)置", "語音", "天氣", "瀏覽器", "youtube" };

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

/*

* 1.準(zhǔn)備數(shù)據(jù)源 2.添加適配器 3.GridView加載適配器(SimpleAdapter)

* 4.GridView設(shè)置監(jiān)聽事件(OnItemClickListener)

*/

//準(zhǔn)備數(shù)據(jù)源

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

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

?//新建適配器

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

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

R.id.TextView });

//加載適配器到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;

}

}

為什么我的模擬器什么也沒有顯示？什么原因？