android开发_ImageSwitcher

 1 <?xml version="1.0" encoding="utf-8"?>
 2 
 3 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 4     android:layout_width="match_parent" 
 5     android:layout_height="match_parent"> 
 6     
 7     <ImageSwitcher android:id="@+id/switcher"
 8         android:layout_width="match_parent"
 9         android:layout_height="match_parent"
10         android:layout_alignParentTop="true"
11         android:layout_alignParentLeft="true"
12     />
13     
14     <Gallery android:id="@+id/gallery"
15         android:background="#55000000"
16         android:layout_width="match_parent"
17         android:layout_height="60dp"
18         android:layout_alignParentBottom="true"
19         android:layout_alignParentLeft="true"
20         
21         android:gravity="center_vertical"
22         android:spacing="16dp"
23     />
24 
25 </RelativeLayout>

  1 package com.b510;
  2 
  3 import android.app.Activity;
  4 import android.content.Context;
  5 import android.os.Bundle;
  6 import android.view.View;
  7 import android.view.ViewGroup;
  8 import android.view.Window;
  9 import android.view.animation.AnimationUtils;
 10 import android.widget.AdapterView;
 11 import android.widget.BaseAdapter;
 12 import android.widget.Gallery;
 13 import android.widget.ImageSwitcher;
 14 import android.widget.ImageView;
 15 import android.widget.AdapterView.OnItemSelectedListener;
 16 import android.widget.Gallery.LayoutParams;
 17 import android.widget.ViewSwitcher.ViewFactory;
 18 
 19 public class MainActivity extends Activity implements OnItemSelectedListener,
 20         ViewFactory {
 21     /** 定义一个切换图片对象is */
 22     private ImageSwitcher is;
 23     /** 定义一个画廊Galley对象 */
 24     private Gallery gallery;
 25 
 26     /** 定义图片资源 */
 27     private Integer[] mThumbIds = { R.drawable.b, R.drawable.p4, R.drawable.d,
 28             R.drawable.f, R.drawable.p8, R.drawable.p1, R.drawable.p2,
 29             R.drawable.p3, R.drawable.c, R.drawable.p5, R.drawable.p6,
 30             R.drawable.p7, R.drawable.g, };
 31     /** 定义图片的id */
 32     private Integer[] mImageIds = { R.drawable.b, R.drawable.p4, R.drawable.d,
 33             R.drawable.f, R.drawable.p8, R.drawable.p1, R.drawable.p2,
 34             R.drawable.p3, R.drawable.c, R.drawable.p5, R.drawable.p6,
 35             R.drawable.p7, R.drawable.g, };
 36 
 37     @Override
 38     protected void onCreate(Bundle savedInstanceState) {
 39         // TODO Auto-generated method stub
 40         super.onCreate(savedInstanceState);
 41         // 关掉在屏幕顶端的标题
 42         requestWindowFeature(Window.FEATURE_NO_TITLE);
 43         // 得到图片的布局文件
 44         setContentView(R.layout.imageswitcherpage);
 45         // 初始化is对象
 46         is = (ImageSwitcher) findViewById(R.id.switcher);
 47         // 设置工厂用来创建两种视图的ViewSwitcher之间会翻转
 48         is.setFactory(this);
 49         // 定义的动画
 50         is.setInAnimation(AnimationUtils.loadAnimation(this,
 51                 android.R.anim.fade_in));
 52         is.setOutAnimation(AnimationUtils.loadAnimation(this,
 53                 android.R.anim.fade_out));
 54 
 55         gallery = (Gallery) findViewById(R.id.gallery);
 56         // 给画廊添加适配器
 57         gallery.setAdapter(new ImageAdapter(this));
 58         // 给画廊中的每一个item设置选择监听器
 59         gallery.setOnItemSelectedListener(this);
 60     }
 61 
 62     // 重写makeView方法
 63     @Override
 64     public View makeView() {
 65         ImageView i = new ImageView(this);
 66         i.setBackgroundColor(0xFF000000);
 67         i.setScaleType(ImageView.ScaleType.FIT_CENTER);
 68         i.setLayoutParams(new ImageSwitcher.LayoutParams(
 69                 LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
 70         return i;
 71     }
 72 
 73     public class ImageAdapter extends BaseAdapter {
 74         public ImageAdapter(Context c) {
 75             mContext = c;
 76         }
 77 
 78         public int getCount() {
 79             return mThumbIds.length;
 80         }
 81 
 82         public Object getItem(int position) {
 83             return position;
 84         }
 85 
 86         public long getItemId(int position) {
 87             return position;
 88         }
 89 
 90         public View getView(int position, View convertView, ViewGroup parent) {
 91             ImageView i = new ImageView(mContext);
 92 
 93             i.setImageResource(mThumbIds[position]);
 94             i.setAdjustViewBounds(true);
 95             i.setLayoutParams(new Gallery.LayoutParams(
 96                     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
 97             i.setBackgroundResource(R.drawable.e);
 98             return i;
 99         }
100 
101         private Context mContext;
102 
103     }
104 
105     @Override
106     public void onItemSelected(AdapterView<?> parent, View view, int position,
107             long id) {
108         // 当每一个对象被选择时得到图像的id
109         is.setImageResource(mImageIds[position]);
110 
111     }
112 
113     @Override
114     public void onNothingSelected(AdapterView<?> parent) {
115 
116     }
117 }