GridView的应用

MainActivity代码 1 package gridviewdemo4.example.administrator.gridviewdemo04;
 2
 3 import android.app.Activity;
 4 import android.support.v7.app.AppCompatActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.AdapterView;
 8 import android.widget.GridView;
 9 import android.widget.SimpleAdapter;
10 import android.widget.Toast;
11
12 import java.util.ArrayList;
13 import java.util.HashMap;
14 import java.util.List;
15 import java.util.Map;
16
17 public class MainActivity extends Activity implements AdapterView.OnItemClickListener{
18     GridView gridView;
19     private List<Map<String,Object>> datalist;
20
21     private SimpleAdapter simpleAdapter;
22    /* 1设置数据源
23     2 新建适配器
24     3 GridView加载到适配器
25     4 GridView配置事件监听器(实现OnItemClickListener接口)*/
26
27     private int[] icon={R.drawable.calendar, R.drawable.camera,R.drawable.clock,R.drawable.games_control,R.drawable.messenger,R.drawable.ringtone
28             ,R.drawable.settings,R.drawable.speech_balloon,R.drawable.weather,R.drawable.world,R.drawable.youtube};
29     private  String[] iconName={"日历","照相机","闹钟","游戏","联系人","音乐","设置","短信息","天气","浏览器","优土"};
30     @Override
31     protected void onCreate(Bundle savedInstanceState) {
32         super.onCreate(savedInstanceState);
33         setContentView(R.layout.main);
34         gridView= (GridView) findViewById(R.id.gridView);
35         datalist=new ArrayList<Map<String,Object>>();
36         simpleAdapter=new SimpleAdapter(this,getData(),R.layout.item,new String[]{"pic","text"},new int[]{R.id.image,R.id.text});
37         gridView.setAdapter(simpleAdapter);
38         gridView.setOnItemClickListener(this);
39     }
40     private List<Map<String,Object>> getData(){
41
42         for(int i=0;i<icon.length;i++){
43             Map<String,Object> map=new HashMap<String, Object>();
44             map.put("pic",icon[i]);
45             map.put("text",iconName[i]);
46             datalist.add(map);
47         }
48         return datalist;
49     }
50
51     @Override
52     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
53         Toast.makeText(this,iconName[position],Toast.LENGTH_SHORT).show();/*pisition从0开始计数*/
54     }
55 }

item.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical" android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:gravity="center"
 6     android:background="@color/black">
 7     <ImageView
 8         android:src="@drawable/ic_launcher"
 9         android:layout_width="60dp"
10         android:layout_height="60dp"
11         android:id="@+id/image"
12         />
13     <TextView
14         android:layout_marginTop="5dp"
15         android:layout_width="wrap_content"
16         android:layout_height="wrap_content"
17         android:id="@+id/text"
18         android:textColor="@color/white"
19         android:textSize="20sp"
20         android:text="文字"/>
21 </LinearLayout>

main.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical" android:layout_width="match_parent"
 4     android:layout_height="match_parent">
 5     <GridView
 6         android:layout_width="wrap_content"
 7         android:layout_height="wrap_content"
 8         android:id="@+id/gridView"
 9         android:numColumns="3"
10         android:horizontalSpacing="10dp"
11         android:verticalSpacing="10dp"
12
13         ></GridView>
14 </LinearLayout>
15   <!--  android:numColumns="auto_fit" 每一行显示多少列，auto_fit自动适应
16     android:horizontalSpacing="10dp"  两列之间的间距
17     android:verticalSpacing="10dp"  两行之间的间距-->