anndroid左右触摸滑动图片，动画

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <ViewFlipper
            android:id="@+id/vf"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
           />

</RelativeLayout>

 package s.jf3q.gesture;


import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.ViewFlipper;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
//实现GestureDetector.OnGestureListener手势
public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener {
    int[] imgs=new int[]{R.drawable.img1,R.drawable.img2,R.drawable.img3,R.drawable.img4};
    Animation[] an=new Animation[4];
    GestureDetector g;
    ViewFlipper f;//放置轮播的组件

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        g=new GestureDetector(MainActivity.this);
        f=findViewById(R.id.vf);
        for(int i=0;i<imgs.length;i++){
            ImageView v=new ImageView(MainActivity.this);
            v.setImageResource(imgs[i]);
            f.addView(v);
        }
        an[0]= AnimationUtils.loadAnimation(MainActivity.this,R.anim.slide_in_left);
        an[1]= AnimationUtils.loadAnimation(MainActivity.this,R.anim.slide_out_left);
        an[2]= AnimationUtils.loadAnimation(MainActivity.this,R.anim.slide_in_right);
        an[3]= AnimationUtils.loadAnimation(MainActivity.this,R.anim.slide_out_right);


    }

    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {

    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        if(e1.getX()-e2.getX()>50){
            //左滑动画
            f.setInAnimation(an[2]);
            f.setOutAnimation(an[1]);
            f.showPrevious();
            return true;
        }
        if(e2.getX()-e1.getX()>50){
            //右滑动画
            f.setInAnimation(an[0]);
            f.setOutAnimation(an[3]);
            f.showNext();
            return true;
        }
        return false;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // 给手势对象绑定触摸事件
        return g.onTouchEvent(event);
    }
}

复制路径D:\android_sdk\platforms\android-32\data\res\anim到项目里