1 package com.arc;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.view.View;
 6 import android.widget.AdapterView;
 7 import android.widget.AdapterView.OnItemSelectedListener;
 8 import android.widget.Gallery;
 9 import android.widget.ImageView;
10 import android.widget.TextView;
11 import android.widget.Toast;
12 import android.widget.AdapterView.OnItemClickListener;
13 
14 public class gallery_Act extends Activity
15 {
16     private ImageView[] mImageViewIds;// 小圆点ImageView数组  
17     private static final int IMAGE_COUNT = 3;// 小圆点个数  
18     @Override
19     public void onCreate(Bundle savedInstanceState)
20     {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.main);
23         mImageViewIds = new ImageView[] { 
24                 (ImageView) findViewById(R.id.dot_1),  
25                 (ImageView) findViewById(R.id.dot_2),  
26                 (ImageView) findViewById(R.id.dot_3)};
27         
28         
29         //gallery
30         Gallery g = (Gallery) findViewById(R.id.gallery);
31         g.setAdapter(new ImageAdapter(this));
32         g.setSelection(200);
33         g.setOnItemClickListener(new GalleryItemListener());
34         g.setOnItemSelectedListener((OnItemSelectedListener) new GalleryItemSelectedListener());
35 
36     
37     }
38     class GalleryItemListener implements OnItemClickListener {
39         public void onItemClick(AdapterView<?> parent, View view, int position,
40                 long id) {
41             Toast.makeText(gallery_Act.this, "你选择了" + (position + 1) + " 号图片",
42                     Toast.LENGTH_SHORT).show();
43 
44         }
45     }
46     
47     class GalleryItemSelectedListener implements OnItemSelectedListener {  
48         
49         public void onItemSelected(AdapterView<?> parent, View view,  
50                 int position, long id) {  
51             int pos = position % IMAGE_COUNT;  
52             mImageViewIds[pos].setImageDrawable(getBaseContext().getResources()  
53                     .getDrawable(R.drawable.ic_dot_focused));  
54 //            if (pos > 0) {  
55 //                mImageViewIds[pos - 1].setImageDrawable(getBaseContext()  
56 //                        .getResources().getDrawable(R.drawable.ic_dot_normal));  
57 //            }  
58 //            if (pos < (IMAGE_COUNT - 1)) {  
59 //                mImageViewIds[pos + 1].setImageDrawable(getBaseContext()  
60 //                        .getResources().getDrawable(R.drawable.ic_dot_normal));  
61 //            }  
62 //            if (pos == 0) {  
63 //                mImageViewIds[IMAGE_COUNT - 1]  
64 //                        .setImageDrawable(getBaseContext().getResources()  
65 //                        .getDrawable(R.drawable.ic_dot_normal));  
66 //            }  
67             if (pos == 1) {  
68               mImageViewIds[2]  
69                       .setImageDrawable(getBaseContext().getResources()  
70                       .getDrawable(R.drawable.ic_dot_normal));
71               mImageViewIds[0]  
72                       .setImageDrawable(getBaseContext().getResources()  
73                       .getDrawable(R.drawable.ic_dot_normal));
74           } 
75             if (pos == 2) {  
76                 mImageViewIds[1]  
77                         .setImageDrawable(getBaseContext().getResources()  
78                         .getDrawable(R.drawable.ic_dot_normal));
79                 mImageViewIds[0]  
80                         .setImageDrawable(getBaseContext().getResources()  
81                         .getDrawable(R.drawable.ic_dot_normal));
82             } 
83             if (pos == 0) {  
84                 mImageViewIds[1]  
85                         .setImageDrawable(getBaseContext().getResources()  
86                         .getDrawable(R.drawable.ic_dot_normal));
87                 mImageViewIds[2]  
88                         .setImageDrawable(getBaseContext().getResources()  
89                         .getDrawable(R.drawable.ic_dot_normal));
90             } 
91         }
92 
93         public void onNothingSelected(AdapterView<?> arg0) {
94             // TODO Auto-generated method stub
95             
96         }  
97 }
98     
99 }

package com.arc;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {

    // 定义Context
    private Context mContext;
    // 定义整型数组 即图片源,  news1,news2,news3存放在 mImagineIds的数组中
    private Integer[] mImageIds = { R.drawable.news1, R.drawable.news2,
            R.drawable.news3 };

    // 声明ImageAdapter
    public ImageAdapter(Context c) {
        mContext = c;
    }

    // 获取图片的个数
    public int getCount() {
        return Integer.MAX_VALUE;
    }

    // 获取图片在库中的位置
    public Object getItem(int position) {
        return position;
    }

    // 获取图片ID
    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
//        ImageView imageview = new ImageView(mContext);
//
//        // 给ImageView设置资源
//        imageview.setImageResource(mImageIds[position]);
//        // 设置布局 图片120*120
//        imageview.setLayoutParams(new Gallery.LayoutParams(120, 120));
//        // 设置显示比例类型
//        imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
//        
//        return imageview;
        
        //下面的方法实现了循环播放。。。。。
         /* 创建一个ImageView对象 */
          ImageView i = new ImageView(this.mContext);
          i.setPadding(10, 10, 10, 10);
          i.setLayoutParams(new Gallery.LayoutParams(300, 150));
          //i.setAlpha(80);
          // i.setImageResource(this.myImageIds[position]);
          if(position<0){
            position =position+mImageIds.length;
          }
          i.setImageResource(this.mImageIds[position% mImageIds.length]);
          i.setScaleType(ImageView.ScaleType.FIT_XY);
          //i.setBackgroundResource(mGalleryItemBackground);
          /* 设置这个ImageView对象的宽高，单位为dip */
          //i.setLayoutParams(new Gallery.LayoutParams(85, 72));
          return i;
    }
}