【05】GridView初次使用

package min.gridview_1;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.os.Build;

public class MainActivity extends Activity {

private GridView gridView;
private SimpleAdapter adapter;
private List<Map<String, Object>> dataList;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
gridView=(GridView) findViewById(R.id.gridView);
dataList=new ArrayList<Map<String,Object>>();
adapter=new SimpleAdapter(this, getData(), R.layout.item, new String[]{"pic","name"}, new int[]{R.id.pic,R.id.name});
gridView.setAdapter(adapter);
}

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

int[] drawable = { 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 };
String[] iconName = { "联系人", "日历", "照相机", "时钟", "游戏", "短信", "铃声", "设置",
"语音", "天气", "浏览器", "Youtube" };
for (int i = 0; i < drawable.length; i++) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("pic", drawable[i]);
map.put("name", iconName[i]);
dataList.add(map);
}
Log.i("Main", "size="+dataList.size());
return dataList;
}
}

<?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:background="#000000"
android:orientation="vertical" >

<!--
GridView是可滚动的网格。一般用来显示多张图片。
android:horizontalSpacing="5dp" 两列之间的间距是5dp
android:verticalSpacing="5dp" 两行之间的间距是5dp
android:stretchMode="spacingWidth" 缩放与列宽大小同步
android:numColumns="auto_fit" 本来是一行显示几个，现在改为自动分配
-->

<GridView
android:id="@+id/gridView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:gravity="center_horizontal"
android:horizontalSpacing="10dp"
android:numColumns="3"
android:verticalSpacing="10dp" />

</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" >

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

<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:text="名字"
android:textColor="#ffffff" />

</LinearLayout>