Android实例，实现左右滑动查看相册，图片切换器的应用

效果图如下：

activity_main.xml文件

package com.mingrisoft.showpictrue;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.AnimationUtils;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;

public class MainActivity extends ActionBarActivity {
    //保存图像Id
    private int[] arrayPicture=new int[]{
            R.drawable.t1,R.drawable.t2,R.drawable.t3,
            R.drawable.t4,R.drawable.t5,R.drawable.t6,
            R.drawable.t7,R.drawable.t8,R.drawable.t9,
    };

    private ImageSwitcher imageSwitcher;
    //当前图片的下标
    private int index;
    //鼠标按下，拿起的坐标
    private  float touchDownX,touchUpX;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //使其全屏显示
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        //获取xml中的图片转换器
        imageSwitcher= (ImageSwitcher) findViewById(R.id.imageswitcher);
        //将图片资源放入图片转换器中
        imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                //创建一个图片对象
                ImageView imageView=new ImageView(MainActivity.this);
                //给该对象设置图片
                imageView.setImageResource(arrayPicture[index]);
                return imageView;
            }
        });
        //触摸事件监听器
        imageSwitcher.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                //如果获得当前事件的活动等于鼠标点下，则给touchDownX赋值
                if(motionEvent.getAction()==MotionEvent.ACTION_DOWN)
                {
                    touchDownX=motionEvent.getX();
                    return true;
                }
                //如果鼠标抬起
                else if(motionEvent.getAction()==MotionEvent.ACTION_UP)
                {
                    //记录此时坐标
                    touchUpX=motionEvent.getX();
                    //判断移动方向
                    if(touchUpX-touchDownX>100)//从左向右
                    {
                        //改变图片下标值，
                        index=(index==0?arrayPicture.length-1:index-1);
                        //渐入渐出效果
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_out));
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_in));
                        //把图片资源给图片切换器
                        imageSwitcher.setImageResource(arrayPicture[index]);
                    }else if(touchDownX-touchUpX>100)//从右向左
                    {
                        index=(index==arrayPicture.length-1?0:index+1);
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_out));
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_in));
                        imageSwitcher.setImageResource(arrayPicture[index]);
                    }
                    return true;
                }
                return false;
            }
        });

    }
}

MainActivity.java文件

package com.mingrisoft.showpictrue;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.AnimationUtils;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;

public class MainActivity extends ActionBarActivity {
    //保存图像Id
    private int[] arrayPicture=new int[]{
            R.drawable.t1,R.drawable.t2,R.drawable.t3,
            R.drawable.t4,R.drawable.t5,R.drawable.t6,
            R.drawable.t7,R.drawable.t8,R.drawable.t9,
    };

    private ImageSwitcher imageSwitcher;
    //当前图片的下标
    private int index;
    //鼠标按下，拿起的坐标
    private  float touchDownX,touchUpX;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //使其全屏显示
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        //获取xml中的图片转换器
        imageSwitcher= (ImageSwitcher) findViewById(R.id.imageswitcher);
        //将图片资源放入图片转换器中
        imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                //创建一个图片对象
                ImageView imageView=new ImageView(MainActivity.this);
                //给该对象设置图片
                imageView.setImageResource(arrayPicture[index]);
                return imageView;
            }
        });
        //触摸事件监听器
        imageSwitcher.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                //如果获得当前事件的活动等于鼠标点下，则给touchDownX赋值
                if(motionEvent.getAction()==MotionEvent.ACTION_DOWN)
                {
                    touchDownX=motionEvent.getX();
                    return true;
                }
                //如果鼠标抬起
                else if(motionEvent.getAction()==MotionEvent.ACTION_UP)
                {
                    //记录此时坐标
                    touchUpX=motionEvent.getX();
                    //判断移动方向
                    if(touchUpX-touchDownX>100)//从左向右
                    {
                        //改变图片下标值，
                        index=(index==0?arrayPicture.length-1:index-1);
                        //渐入渐出效果
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_out));
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_in));
                        //把图片资源给图片切换器
                        imageSwitcher.setImageResource(arrayPicture[index]);
                    }else if(touchDownX-touchUpX>100)//从右向左
                    {
                        index=(index==arrayPicture.length-1?0:index+1);
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_out));
                        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,android.R.anim.fade_in));
                        imageSwitcher.setImageResource(arrayPicture[index]);
                    }
                    return true;
                }
                return false;
            }
        });

    }
}

该实例为图片切换器的应用，敲完之后，你会更了解图片切换器哒~