<?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">
<ImageSwitcher android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageSwitcher"
/>
</RelativeLayout>
package com.example.imageswitcher;
import android.app.Activity;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends Activity {
private int[] arrayPicture=new int[]{R.drawable.sea,R.drawable.star,R.drawable.timg,R.drawable.ck};
private ImageSwitcher imageSwitcher;
private int index;
private float touchDownX;
private float touchUpX;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//设置全屏显示
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
//获取图片切换器
imageSwitcher=findViewById(R.id.imageSwitcher);
//视图工厂
imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
@Override
public View makeView() {
ImageView imageView=new ImageView(MainActivity.this);
imageView.setImageResource(arrayPicture[index]);
return imageView;
}
});
imageSwitcher.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction()== MotionEvent.ACTION_DOWN)//手指按下
{
touchDownX= event.getX();
return true;
}
else if(event.getAction()==MotionEvent.ACTION_UP)//手指抬起
{
touchUpX= event.getX();
if(touchUpX-touchDownX>100)//从左向右滑动
{
//如果当前图片是第一张图片，切换到最后一张，否则切换到上一张
index=index==0?arrayPicture.length-1:index-1;
imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,
android.R.anim.fade_in));//设置进入效果
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(MainActivity.this,
android.R.anim.fade_out));//设置淡出效果
imageSwitcher.setImageResource(arrayPicture[index]);
}
else if(touchDownX-touchUpX>100)
{
index=index==arrayPicture.length-1?0:index+1;
imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(MainActivity.this,
android.R.anim.fade_in));//设置进入效果
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(MainActivity.this,
android.R.anim.fade_out));//设置淡出效果
imageSwitcher.setImageResource(arrayPicture[index]);
}
return true;
}
return false;
}
});
}
}
