<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:src="@drawable/a1"/>
    
</LinearLayout>

package test.imageView;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

public class Test_imageViewActivity extends Activity {
    //该数组为4张图片进行了简单的排序
    private int[] a = new int[]{
            R.drawable.a1,
            R.drawable.a2,
            R.drawable.a3,
            R.drawable.a4
            
    };
    //设定简单计数器，
    private int count=0;
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
      
        setContentView(R.layout.main);
        
        ImageView imageView = (ImageView)findViewById(R.id.imageView1);
        
        imageView.setOnClickListener(new OnClickListener(){

            public void onClick(View v) {
                ImageView view =(ImageView) v;
                if(count==3){
                    count=0;
                }
                view.setImageResource(a[++count]);
                
            }
            
            
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:src="@drawable/a1"/>
    
</LinearLayout>

package test.imageView;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

public class Test_imageViewActivity extends Activity {
    //该数组为4张图片进行了简单的排序
    private int[] a = new int[]{
            R.drawable.a1,
            R.drawable.a2,
            R.drawable.a3,
            R.drawable.a4
            
    };
    //设定简单计数器，
    private int count=0;
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
      
        setContentView(R.layout.main);
        
        ImageView imageView = (ImageView)findViewById(R.id.imageView1);
        
       
        
        //如何获取到屏幕的宽度
        final int width = this.getWindowManager().getDefaultDisplay().getWidth();        
        imageView.setOnTouchListener(new OnTouchListener(){
            public boolean onTouch(View v, MotionEvent event) {
                 //如何在图片点击的过程中，获得点击x轴的坐标
                int x =(int) event.getX();
                ImageView view =(ImageView) v;
                if(x>=(width/2)){
                    //右侧
                    if(count==3){
                        count=-1;//当++count之后就变为0了
                    }
                    view.setImageResource(a[++count]);
                }else{
                    //左侧
                    if(count==0){
                        count=4;//当--count之后就变为3了
                    }
                    view.setImageResource(a[--count]);
                }
                return false;
            }
            
        });
    }
}