android之ImageSwitcher 图片查看

布局文件如下：

<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      >      <ImageSwitcher android:id="@+id/switcher"       android:layout_width="fill_parent"       android:layout_height="fill_parent"       android:layout_alignParentLeft="true"       android:layout_alignParentTop="true">      </ImageSwitcher>      <Gallery android:id="@+id/gallery"       android:layout_width="fill_parent"       android:layout_alignParentLeft="true"       android:layout_height="60dp"       android:spacing="15dp"       android:layout_alignParentBottom="true"       android:gravity="center_vertical"       android:background="#aaaaaa">      </Gallery>  </RelativeLayout>

package com.cloay.imageswitcher;    import android.app.Activity;  import android.content.Context;  import android.content.res.TypedArray;  import android.os.Bundle;  import android.view.View;  import android.view.ViewGroup;  import android.view.animation.AnimationUtils;  import android.widget.AdapterView;  import android.widget.AdapterView.OnItemSelectedListener;  import android.widget.Gallery.LayoutParams;  import android.widget.BaseAdapter;  import android.widget.Gallery;  import android.widget.ImageSwitcher;  import android.widget.ImageView;  import android.widget.ViewSwitcher.ViewFactory;    /**   * ImageSwitcherActivity.java   * @author cloay   * 2011-7-16   */  public class ImageSwitcherActivity extends Activity implements OnItemSelectedListener, ViewFactory{   private ImageSwitcher imageSwitcher;   private Gallery gallery;   private Integer [] imagesId = new Integer[]{R.drawable.b, R.drawable.c, R.drawable.d,      R.drawable.f, R.drawable.g};   private Integer [] selectId = new Integer[]{R.drawable.b, R.drawable.c, R.drawable.d,      R.drawable.f, R.drawable.g};      @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);                    imageSwitcher = (ImageSwitcher)findViewById(R.id.switcher);          imageSwitcher.setFactory(this);          //设置图片切换时的动画效果          imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));          imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));                    gallery = (Gallery)findViewById(R.id.gallery);          //自定义ImageAdapter继承于BaseAdapter，是一个内部类          gallery.setAdapter(new ImageAdapter(this));          gallery.setOnItemSelectedListener(this);      }     @Override   public View makeView() {    ImageView image = new ImageView(this);    image.setScaleType(ImageView.ScaleType.FIT_CENTER);    image.setLayoutParams(new ImageSwitcher.LayoutParams(      LayoutParams.FILL_PARENT, LayoutParams.MATCH_PARENT));    return image;   }     @Override   public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,     long arg3) {    imageSwitcher.setImageResource(imagesId[arg2]);   }     @Override   public void onNothingSelected(AdapterView<?> arg0) {       }   public class ImageAdapter extends BaseAdapter{    private Context context;    int galleryItemBackground;    public ImageAdapter (Context c){     context = c;     TypedArray typeArray = obtainStyledAttributes(R.styleable.Gallery1);     galleryItemBackground = typeArray.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);     typeArray.recycle();    }    @Override    public int getCount() {     //返回selectId[]的长度     return selectId.length;    }      @Override    public Object getItem(int position) {     return position;    }      @Override    public long getItemId(int position) {     return position;    }      @Override    public View getView(int position, View convertView, ViewGroup parent) {     ImageView imageView = new ImageView(context);     //设置资源图片     imageView.setImageResource(selectId[position]);     imageView.setAdjustViewBounds(true);  //允许调整边框     //设定底部画廊，自适应大小     imageView.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));     //设置画廊背景     imageView.setBackgroundResource(galleryItemBackground);     return imageView;    }       }  }