android图片转换器示例

mainactivity.java

package com.zhang.showphoto;

import android.app.actionbar.layoutparams;
import android.app.activity;
import android.os.bundle;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.animation.animationutils;
import android.widget.button;
import android.widget.imageswitcher;
import android.widget.imageview;
import android.widget.viewswitcher.viewfactory;

public class mainactivity extends activity {

 private int[] imagid=new int[]{
   r.drawable.img01,r.drawable.img02,r.drawable.img03,r.drawable.img04,
   r.drawable.img05,r.drawable.img06,r.drawable.img07,r.drawable.img08,
   r.drawable.img09,r.drawable.img10
  };
 private int index=0;
 private imageswitcher imageswitcher;
 private button up,down;
 

 @override
 protected void oncreate(bundle savedinstancestate) {

  super.oncreate(savedinstancestate);
  setcontentview(r.layout.main);

  up=(button) findviewbyid(r.id.bt1);
  down=(button) findviewbyid(r.id.bt2);

 
  imageswitcher=(imageswitcher) findviewbyid(r.id.imagsw1);
  imageswitcher.setinanimation(animationutils.loadanimation(this, android.r.anim.fade_in));
  imageswitcher.setoutanimation(animationutils.loadanimation(this, android.r.anim.fade_out));
  imageswitcher.setfactory(new viewfactory() {

  
   public view makeview() {
    imageview imageview = new imageview(mainactivity.this);
    imageview.setscaletype(imageview.scaletype.fit_center);
    imageview.setlayoutparams(new imageswitcher.layoutparams(
      layoutparams.wrap_content,layoutparams.wrap_content
      ));
    return imageview;
   }
  });

  imageswitcher.setimageresource(imagid[index]);

  up.setonclicklistener(new onclicklistener() {

   @override
   public void onclick(view v) {
    if(index>0){
     index--;
    }else{
     index=imagid.length-1;
    }
    imageswitcher.setimageresource(imagid[index]);
   }
  });

  down.setonclicklistener(new onclicklistener() {

   @override
   public void onclick(view v) {
    if(index<imagid.length-1){
     index++;
    }else{
     index=0;
    }
    imageswitcher.setimageresource(imagid[index]);
   }
  });
 }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="@drawable/bg1"
    android:id="@+id/llayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:orientation="horizontal" >

    <button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="上一张"
        android:id="@+id/bt1"
        />
    <imageswitcher
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imagsw1"
        android:layout_gravity="center"
        />
     <button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下一张"
        android:id="@+id/bt2"
        />

</linearlayout>