无线轮播触摸跳转下一个页面

来源：互联网发布：人工智能简史 pdf 编辑：程序博客网时间：2024/05/16 03:40

//main方法

import android.os.Handler;import android.os.Message;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;import java.util.ArrayList;import java.util.List;/** * * ViewPager 自动无限轮播-前不见头 后不见尾，handler * * 适配器PagerAdapter * 1.getCount:Interger.max_value无限大 * 2.insta...Item:装载页面   1.加载页面的视图 2.返回一个object *               动态生成页面 * * 3.destroy...item:销毁页面 去掉super.des... 移除remove(view) * 3.isViewfromObject: arg1==arg0 * * viewpager默认是加载三页 * 设置当前显示的页面  setCurrentItem(0) * * ImageLoader异步获取图片 * * * */public class MainActivity extends AppCompatActivity {    private ViewPager viewPager;    private List<String> list;    private LinearLayout linearLayout;    //存放小圆点控件的集合    private List<ImageView> images;    private Handler myHandler=new Handler(){        @Override        public void handleMessage(Message msg) {            //获取当前正在显示的页面            int index=viewPager.getCurrentItem();            viewPager.setCurrentItem(index+1);            //改变小圆点            setSelectedPoint((index+1)%list.size());            //延迟发送消息            sendEmptyMessageDelayed(1,2000);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        viewPager = (ViewPager) findViewById(R.id.vp);        linearLayout = (LinearLayout) findViewById(R.id.lin_bottom);        //数据.....装的是path路径        list = new ArrayList<>();        list.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505151721118&di=649c9a43aed72fbc4d99ec1a031510c6&imgtype=0&src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F015c7d574b9f8f6ac72525aee98351.jpg");        list.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505151956771&di=0eb6f306991d24b67a13ceb336f80102&imgtype=0&src=http%3A%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F00613def3f1beb7a35ae136341be2b589bc46a2d.jpg_320x200.jpg");        list.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505151847685&di=c7a4b5d08ec43fa629bcb690039a7629&imgtype=0&src=http%3A%2F%2Fattimg.dospy.com%2Fimg%2Fday_080625%2F20080625_2e91a10c444877e88827vri2ZKdGMvQo.jpg");        list.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505151825129&di=70bf74b87d8a15cb91a2d79f15ed0eaf&imgtype=0&src=http%3A%2F%2Fattimg.dospy.com%2Fimg%2Fday_081016%2F20081016_fee215664d5740e56c13E2YB8giERFEX.jpg");        list.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1505746504&di=930c4d677a02328a142d6fa85ed14580&imgtype=jpg&er=1&src=http%3A%2F%2Fattimg.dospy.com%2Fimg%2Fday_090113%2F20090113_6ac58b42bea94f0b318e1B6BZb5lPZl5.jpg");        //初始化小圆点        initDoc();        //设置适配器        viewPager.setAdapter(new ImagePager(this,list,myHandler));        //设置当前要显示的页面        viewPager.setCurrentItem(list.size()*10);        //实现自动播放        myHandler.sendEmptyMessageDelayed(1,2000);    }    /**     * 改变小圆点图片     * @param index  页面的下标     */    public  void setSelectedPoint(int index){        for(int i=0;i<images.size();i++){            if(i==index){                images.get(i).setImageResource(R.drawable.rb_select);            }else{                images.get(i).setImageResource(R.drawable.rb_un_select);            }        }    }    /**     * 初始化小圆点     * 动态添加     */    private void initDoc() {        images=new ArrayList<>();        for(int i=0;i<list.size();i++){            ImageView imgPoint=new ImageView(this);            //设置图片的缩放模式            imgPoint.setScaleType(ImageView.ScaleType.FIT_XY);            //设置要显示的图片            if(i==0){                //红色的点                imgPoint.setImageResource(R.drawable.rb_select);            }else{                imgPoint.setImageResource(R.drawable.rb_un_select);            }            //设置宽度与高度            LinearLayout.LayoutParams  params=new LinearLayout.LayoutParams(40,40);            params.setMargins(10,0,10,0);            //添加到底部容器中            linearLayout.addView(imgPoint,params);            //添加到集合中            images.add(imgPoint);        }    }}

//工具包

import android.content.Context;import android.graphics.Bitmap;import android.os.Environment;import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiskCache;import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;import java.io.File;/** * Created by 知足 on 2017/10/18. */public class ImageLoaerUtil {    /**     * ImageLoader的配置     * @param context     */    public static void initConfig(Context context) {        //配置//        File cacheFile=context.getExternalCacheDir();        File cacheFile= new File(Environment.getExternalStorageDirectory()+"/"+"imgages");        ImageLoaderConfiguration config=new ImageLoaderConfiguration.Builder(context)                .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽                .threadPoolSize(2)//线程池的数量                .threadPriority(4)                .memoryCacheSize(2*1024*1024)//设置内存缓存区大小                .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小                .diskCache(new UnlimitedDiskCache(cacheFile))//自定义缓存目录                .writeDebugLogs()//打印日志内容                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理                .build();        ImageLoader.getInstance().init(config);    }    /**     * 获取图片设置类     * @return     */    public static DisplayImageOptions getImageOptions(){        DisplayImageOptions optionsoptions=new DisplayImageOptions.Builder()                .cacheInMemory(true)//使用内存缓存                .cacheOnDisk(true)//使用磁盘缓存                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片格式                .build();        return optionsoptions;    }}

//适配器

import android.content.Context;import android.content.Intent;import android.os.Handler;import android.support.v4.view.PagerAdapter;import android.text.Html;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import com.nostra13.universalimageloader.core.ImageLoader;import java.util.List;/** * Created by 知足 on 2017/10/18. */public class ImagePager extends PagerAdapter {     Context context;     List<String> list;     Handler mHandler;    public ImagePager(Context context, List<String> list, Handler mHandler) {        this.context = context;        this.list = list;        this.mHandler = mHandler;    }    @Override    public int getCount() {        return Integer.MAX_VALUE;    }    @Override    public boolean isViewFromObject(View view, Object object)    {        return view==object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {         //返回当前显示的视图        ImageView imageView=new ImageView(context);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        //加载网络的图片list.get(position%list.size())        ImageLoader.getInstance().displayImage(list.get(position%list.size()),imageView,ImageLoaerUtil.getImageOptions());        imageView.setOnTouchListener(new View.OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()){                    case MotionEvent.ACTION_DOWN:                        Log.d("zzz","down--");                        //移除消息                        mHandler.removeCallbacksAndMessages(null);                        break;                    case MotionEvent.ACTION_MOVE:                        Log.d("zzz","move--");                        break;                    case MotionEvent.ACTION_UP:                        Log.d("zzz","up--");                        //再次发送消息                        mHandler.sendEmptyMessageDelayed(1,2000);                        Intent intent=new Intent(context,Main2Activity.class);                        context.startActivity(intent);                        break;                    case MotionEvent.ACTION_CANCEL:                        Log.d("zzz","cancel--");                        //再次发送消息                        mHandler.sendEmptyMessageDelayed(1,2000);                        break;                }                return true;            }        });        //添加到容器中        container.addView(imageView);        return imageView;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView((View) object);    }}

//Main方法2

public class Main2Activity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);    }}

//工具包调用

import android.app.Application;/** * Created by 知足 on 2017/10/18. */public class MyApplication extends Application{    @Override    public void onCreate() {        super.onCreate();        //进行全局初始化        ImageLoaerUtil.initConfig(this);    }}

//设置小圆点颜色

//选中时颜色

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval">    <solid android:color="#f00"></solid></shape>

//不选时颜色

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="oval">    <solid android:color="#ccc"></solid></shape>

//activity-main

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent" tools:context="com.example.viewpager.MainActivity">    <android.support.v4.view.ViewPager        android:layout_width="match_parent"        android:layout_height="200dp"        android:id="@+id/vp"></android.support.v4.view.ViewPager>    <!--android：layout_alignBottom: 控件的下边对齐-->    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal"        android:id="@+id/lin_bottom"        android:layout_alignBottom="@+id/vp"        android:gravity="center"        android:layout_marginBottom="7dp"></LinearLayout></RelativeLayout>

//activity-main2

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.viewpager.Main2Activity">    <RatingBar        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/ratingBar"        android:layout_alignParentTop="true"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_marginTop="114dp" /></android.support.constraint.ConstraintLayout>

//需要加的权限

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.viewpager">    <uses-permission android:name="android.permission.INTERNET" />    <application        android:name=".MyApplication"        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".Main2Activity"></activity>    </application></manifest>

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