左右切换图片控件大家都用ViewPager, ViewFipper比较多吧，我之前也用ViewPager实现了，使用ViewPager实现左右循环滑动图片，有兴趣的可以去看下，今天介绍的是基于ImageSwitcher实现的左右切换图片，先上截图吧

好了，接下来来看代码吧，第一张图是一个GridView，点击item跳转到第二个界面，第一个界面可以忽略，主要是讲解ImageSwitcher的左右却换图片，先看布局文件

<?xml version="1.0" encoding="UTF-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >    <ImageSwitcher        android:id="@+id/imageSwitcher1"        android:layout_width="fill_parent"        android:layout_height="fill_parent">    </ImageSwitcher>        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="wrap_content"           android:orientation="vertical" >            <LinearLayout                android:id="@+id/viewGroup"                android:layout_width="fill_parent"                android:layout_height="wrap_content"                android:layout_alignParentBottom="true"               android:layout_marginBottom="30dp"                android:gravity="center_horizontal"                android:orientation="horizontal" >            </LinearLayout>        </RelativeLayout></FrameLayout>

package com.example.photoalbum;import android.app.Activity;import android.os.Bundle;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.view.ViewGroup;import android.view.animation.AnimationUtils;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout.LayoutParams;import android.widget.Toast;import android.widget.ViewSwitcher.ViewFactory;public class ShowPhotoActivity extends Activity implements ViewFactory, OnTouchListener{ /**  * ImagaSwitcher 的引用  */ private ImageSwitcher mImageSwitcher; /**  * 图片id数组  */ private int[] imgIds; /**  * 当前选中的图片id序号  */ private int currentPosition; /**  * 按下点的X坐标  */ private float downX; /**  * 装载点点的容器  */ private LinearLayout linearLayout; /**  * 点点数组  */ private ImageView[] tips;  @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.show_photo);    imgIds = new int[]{R.drawable.item01,R.drawable.item02,R.drawable.item03,R.drawable.item04,    R.drawable.item05, R.drawable.item06, R.drawable.item07, R.drawable.item08,R.drawable.item09,    R.drawable.item10, R.drawable.item11, R.drawable.item12};  //实例化ImageSwitcher  mImageSwitcher  = (ImageSwitcher) findViewById(R.id.imageSwitcher1);  //设置Factory  mImageSwitcher.setFactory(this);  //设置OnTouchListener，我们通过Touch事件来切换图片  mImageSwitcher.setOnTouchListener(this);    linearLayout = (LinearLayout) findViewById(R.id.viewGroup);    tips = new ImageView[imgIds.length];  for(int i=0; i<imgIds.length; i++){   ImageView mImageView = new ImageView(this);   tips[i] = mImageView;   LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,                        LayoutParams.WRAP_CONTENT));     layoutParams.rightMargin = 3;   layoutParams.leftMargin = 3;      mImageView.setBackgroundResource(R.drawable.page_indicator_unfocused);   linearLayout.addView(mImageView, layoutParams);  }    //这个我是从上一个界面传过来的，上一个界面是一个GridView  currentPosition = getIntent().getIntExtra("position", 0);  mImageSwitcher.setImageResource(imgIds[currentPosition]);    setImageBackground(currentPosition);   }   /**      * 设置选中的tip的背景      * @param selectItems      */      private void setImageBackground(int selectItems){          for(int i=0; i<tips.length; i++){              if(i == selectItems){               tips[i].setBackgroundResource(R.drawable.page_indicator_focused);              }else{               tips[i].setBackgroundResource(R.drawable.page_indicator_unfocused);              }          }      }  @Override public View makeView() {  final ImageView i = new ImageView(this);  i.setBackgroundColor(0xff000000);  i.setScaleType(ImageView.ScaleType.CENTER_CROP);  i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));  return i ; } @Override public boolean onTouch(View v, MotionEvent event) {  switch (event.getAction()) {  case MotionEvent.ACTION_DOWN:{   //手指按下的X坐标   downX = event.getX();   break;  }  case MotionEvent.ACTION_UP:{   float lastX = event.getX();   //抬起的时候的X坐标大于按下的时候就显示上一张图片   if(lastX > downX){    if(currentPosition > 0){     //设置动画，这里的动画比较简单，不明白的去网上看看相关内容     mImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.left_in));     mImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.right_out));     currentPosition --;     mImageSwitcher.setImageResource(imgIds[currentPosition % imgIds.length]);     setImageBackground(currentPosition);    }else{     Toast.makeText(getApplication(), "已经是第一张", Toast.LENGTH_SHORT).show();    }   }       if(lastX < downX){    if(currentPosition < imgIds.length - 1){     mImageSwitcher.setInAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.right_in));     mImageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(getApplication(), R.anim.lift_out));     currentPosition ++ ;     mImageSwitcher.setImageResource(imgIds[currentPosition]);     setImageBackground(currentPosition);    }else{     Toast.makeText(getApplication(), "到了最后一张", Toast.LENGTH_SHORT).show();    }   }   }      break;  }  return true; }}

左边进入的动画，left_in.xml

<?xml version="1.0" encoding="UTF-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <translate         android:fromXDelta="-100%p"        android:toXDelta="0"        android:duration="500"/></set>

<?xml version="1.0" encoding="UTF-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <translate         android:fromXDelta="0"        android:toXDelta="-100%p"        android:duration="500"/></set>

<?xml version="1.0" encoding="UTF-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <translate         android:fromXDelta="100%p"        android:toXDelta="0"        android:duration="500"/></set>

<?xml version="1.0" encoding="UTF-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <translate         android:fromXDelta="0"        android:toXDelta="100%p"        android:duration="500"/></set>

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