android用户界面-组件Widget-网格视图GridView

GridView按照行列的方式来显示内容。一般适合显示图标。图片等内容，主要用于设置Adapter。

通过基础类BaseAdapter类，重写getView()方法来设置图片显示格式。

/Chapter04_UI_GridView01/src/com/amaker/test/MainActivity.java

1. 代码  
2.  
3. package com.amaker.test;  
4.  
5. import android.app.Activity;  
6. import android.content.Context;  
7. import android.os.Bundle;  
8. import android.view.View;  
9. import android.view.ViewGroup;  
10. import android.widget.BaseAdapter;  
11. import android.widget.GridView;  
12. import android.widget.ImageView;  
13.  
14. public class MainActivity extends Activity {  
15.     private GridView gv;  
16.       
17.     @Override 
18.     public void onCreate(Bundle savedInstanceState) {  
19.         super.onCreate(savedInstanceState);  
20.         setContentView(R.layout.main);  
21.         gv = (GridView)findViewById(R.id.GridView01);  
22.         gv.setNumColumns(4);  
23.         // gv.setNumColumns(3);  
24.         // String[] strs = {"a","a1","a2","b","b1","b2","c","c1","c2"};  
25.         // ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_gallery_item,strs);  
26.         gv.setAdapter(new MyAdapter(this));  
27.           
28.     }  
29.       
30.     class MyAdapter extends BaseAdapter{  
31.           
32.         private Integer[] imgs = {  
33.                 R.drawable.gallery_photo_1,  
34.                 R.drawable.gallery_photo_2,  
35.                 R.drawable.gallery_photo_3,  
36.                 R.drawable.gallery_photo_4,  
37.                 R.drawable.gallery_photo_5,  
38.                 R.drawable.gallery_photo_6,  
39.                 R.drawable.gallery_photo_7,  
40.                 R.drawable.gallery_photo_8,  
41.                   
42.                 R.drawable.gallery_photo_1,  
43.                 R.drawable.gallery_photo_2,  
44.                 R.drawable.gallery_photo_3,  
45.                 R.drawable.gallery_photo_4,  
46.                 R.drawable.gallery_photo_5,  
47.                 R.drawable.gallery_photo_6,  
48.                 R.drawable.gallery_photo_7,  
49.                 R.drawable.gallery_photo_8  
50.         };  
51.         Context context;  
52.         MyAdapter(Context context){  
53.             this.context = context;  
54.         }  
55.         public int getCount() {  
56.             return imgs.length;  
57.         }  
58.  
59.         public Object getItem(int item) {  
60.             return item;  
61.         }  
62.  
63.         public long getItemId(int id) {  
64.             return id;  
65.         }  
66.  
67.         public View getView(int position, View convertView, ViewGroup parent) {  
68.              ImageView imageView;  
69.                 if (convertView == null) {  
70.                     imageView = new ImageView(context);  
71.                     imageView.setLayoutParams(new GridView.LayoutParams(45, 45));  
72.                     imageView.setAdjustViewBounds(false);  
73.                     imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);  
74.                     imageView.setPadding(8, 8, 8, 8);  
75.                 } else {  
76.                     imageView = (ImageView) convertView;  
77.                 }  
78.                 imageView.setImageResource(imgs[position]);  
79.                 return imageView;  
80.         }  
81.     }  
82. } 

本文转自linzheng 51CTO博客，原文链接:http://blog.51cto.com/linzheng/1080690