安卓开发实现画廊效果

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6 
 7 
 8 
 9     <Gallery  
10         android:id="@+id/gallery"  
11         android:spacing="5px"  
12         android:unselectedAlpha="0.5"  
13         android:layout_width="match_parent"  
14         android:layout_height="wrap_content" />
15 
16    
17 </LinearLayout>

 1 package tea_xqx;
 2 
 3 import com.example.tea.R;
 4 
 5 import android.app.Activity;
 6 import android.content.res.TypedArray;
 7 import android.os.Bundle;
 8 import android.view.View;
 9 import android.view.ViewGroup;
10 import android.widget.AdapterView;
11 import android.widget.AdapterView.OnItemClickListener;
12 import android.widget.BaseAdapter;
13 import android.widget.Gallery;
14 import android.widget.ImageView;
15 import android.widget.TextView;
16 import android.widget.Toast;
17 
18 public class MenuTeaTools extends Activity{
19     //设置画廊图片
20     private int[] imageId = new int[] { R.drawable.menu_tea_lvcha,R.drawable.menu_tea_hongcha,R.drawable.menu_tea_baicha,R.drawable.menu_tea_heicha,R.drawable.menu_tea_huangcha,R.drawable.menu_tea_wulongcha};  
21     @Override
22     protected void onCreate(Bundle savedInstanceState) {
23         // TODO Auto-generated method stub
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.menu_tools);
26         
27         Gallery gallery = (Gallery) findViewById(R.id.gallery);
28          BaseAdapter adapter = new BaseAdapter() {  
29                 @Override  
30                 public View getView(int position, View convertView, ViewGroup parent) {  
31                     ImageView imageview;  
32                     if (convertView == null) {  
33                         imageview = new ImageView(MenuTeaTools.this);  
34                         imageview.setScaleType(ImageView.ScaleType.FIT_XY);  
35                         imageview.setLayoutParams(new Gallery.LayoutParams(500, 400));  
36                         TypedArray typedArray = obtainStyledAttributes(R.styleable.Gallery);  
37                         imageview.setBackgroundResource(typedArray.getResourceId(  
38                                 R.styleable.Gallery_android_galleryItemBackground,  
39                                 0));  
40                         imageview.setPadding(5, 0, 5, 0);  
41                     } 
42                     else 
43                     {  
44                         imageview = (ImageView) convertView;  
45                     }  
46                     imageview.setImageResource(imageId[position]);  
47                     return imageview;  
48                 }  
49       
50                 @Override  
51                 public long getItemId(int position) {  
52                     return position;  
53                 }  
54       
55                 @Override  
56                 public Object getItem(int position) {  
57                     return position;  
58                 }  
59       
60                 @Override  
61                 public int getCount() {  
62                     return imageId.length;  
63                 }  
64             };  
65             gallery.setAdapter(adapter);  
66             gallery.setSelection(imageId.length / 2); //默认显示的图片的id  
67             //画廊图片的点击事件
68             gallery.setOnItemClickListener(new OnItemClickListener() {  
69                 @Override  
70                 public void onItemClick(AdapterView<?> parent, View view,  
71                         int position, long id) {
72                 
73                     Toast.makeText(MenuTeaTools.this,  
74                             "第" + String.valueOf(position+1) + "张图片被选中",  
75                             Toast.LENGTH_SHORT).show();  
76                 }  
77             });  
78         }   
79 
80     
81 
82 }

1 <declare-styleable name="Gallery">  
2         <attr name="android:galleryItemBackground" />  
3     </declare-styleable>