Android使用自定义控件实现无限轮播

实现效果:

需求分析:

1） 运用自定义组合控件实现轮播图效果，必须自定义实现，如果使用第三方库为0分；

2） 调用如上接口地址，解析轮播图数据，展示到页面上；

3） 实现自动轮播和手动滑动切换；

4） 页面底部指示器小圆点的绘制。

按type类型判断，如果type为0则跳转到详情页，如果type为1则toast提示“我要跳转到商品详情页”

依赖:testCompile 'junit:junit:4.12'

权限:<uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

MainActivity.java

import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import com.google.gson.Gson;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private MyGroupView myGroupView;    private ArrayList<VpBean> list = new ArrayList<VpBean>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initData();        myGroupView = (MyGroupView) findViewById(R.id.myView);    }    Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            Gson gson = new Gson();            JsonBean jsonBean = gson.fromJson((String) msg.obj, JsonBean.class);            List<JsonBean.DataBean> data = jsonBean.getData();            for (int i = 0; i < data.size(); i++) {                String img = data.get(i).getIcon();                String url = data.get(i).getUrl();                list.add(new VpBean(img, url));            }            myGroupView.setAdapter(new PageAdapter(list, MainActivity.this));        }    };    private void initData() {        new Thread(new Runnable() {            @Override            public void run() {                try {                    URL url = new URL("http://120.27.23.105/ad/getAd");                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();                    int responseCode = urlConnection.getResponseCode();                    if (responseCode == 200) {                        InputStream inputStream = urlConnection.getInputStream();                        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));                        StringBuilder builder = new StringBuilder();                        String stringTemp = "";                        while ((stringTemp = reader.readLine()) != null) {                            builder.append(stringTemp);                        }                        Message message = new Message();                        message.obj = builder.toString();                        handler.sendMessage(message);                    }                } catch (MalformedURLException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }).start();    }}

PageAdapter.java

import android.content.Context;import android.content.Intent;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import com.nostra13.universalimageloader.core.ImageLoader;import java.util.ArrayList;public class PageAdapter extends PagerAdapter {    private ArrayList<VpBean> list;    private Context context;    public PageAdapter(ArrayList list, Context context) {        this.list = list;        this.context = context;    }    @Override    public int getCount() {        return Integer.MAX_VALUE;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView((View) object);    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public Object instantiateItem(ViewGroup container, final int position) {        View inflate = View.inflate(context, R.layout.layout_img, null);        ImageView img = inflate.findViewById(R.id.img);        //Glide.with(context).load(list.get(position % list.size()).getImg()).into(img);        ImageLoader.getInstance().displayImage(list.get(position % list.size()).getImg(), img);        img.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Intent intent = new Intent(context, Main2Activity.class);                intent.putExtra("url", list.get(position).getUrl());                context.startActivity(intent);                //Log.i("aaaaaaaaaaaaa","aaaaaaa");            }        });        container.addView(inflate);        return inflate;    }}

VpBean.java

package com.bwie.myapplication;public class VpBean {    private String img;    private String url;    public VpBean() {        super();    }    public VpBean(String img, String url) {        this.img = img;        this.url = url;    }    @Override    public String toString() {        return "VpBean{" +                "img='" + img + '\'' +                ", url='" + url + '\'' +                '}';    }    public String getImg() {        return img;    }    public void setImg(String img) {        this.img = img;    }    public String getUrl() {        return url;    }    public void setUrl(String url) {        this.url = url;    }}

MyGroupView.java

package com.bwie.myapplication;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.util.AttributeSet;import android.view.View;import android.widget.LinearLayout;public class MyGroupView extends LinearLayout {    private ViewPager viewPager;    public MyGroupView(Context context) {        this(context, null);    }    public MyGroupView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public MyGroupView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        View inflate = View.inflate(context, R.layout.layout_vp, this);        viewPager = inflate.findViewById(R.id.vp);    }    public void setAdapter(PagerAdapter pagerAdapter) {        viewPager.setAdapter(pagerAdapter);    }}

Main2Activity.java

package com.bwie.myapplication;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.webkit.WebView;public class Main2Activity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        //Log.i("aaaaaaaaaaaaaaaa", "bbbbbbbbbbbbbbbbb ");        WebView wv = (WebView) findViewById(R.id.wv);        Intent intent = getIntent();        String urls = intent.getStringExtra("url");        wv.loadUrl(urls);    }}

Img.java

package com.bwie.myapplication;import android.app.Application;import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;public class Img extends Application {    @Override    public void onCreate() {        //图片的二次采样        DisplayImageOptions options = new DisplayImageOptions                .Builder()                .showImageOnLoading(R.mipmap.ic_launcher)                .displayer(new FadeInBitmapDisplayer(2000))                .cacheInMemory(true)                .cacheOnDisc(true)                .build();        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration                .Builder(this)                .defaultDisplayImageOptions(options)                .threadPoolSize(5)                .build();        ImageLoader.getInstance().init(configuration);        super.onCreate();    }

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.bwie.myapplication.MainActivity">    <com.bwie.myapplication.MyGroupView        android:id="@+id/myView"        android:layout_width="match_parent"        android:layout_height="match_parent"></com.bwie.myapplication.MyGroupView></RelativeLayout>

activity_main2.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <WebView        android:id="@+id/wv"        android:layout_width="match_parent"        android:layout_height="match_parent" /></LinearLayout>

layout_img.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <ImageView        android:id="@+id/img"        android:layout_width="match_parent"        android:layout_height="200dp"        android:scaleType="fitXY" /></LinearLayout>

layout_vp.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <android.support.v4.view.ViewPager        android:id="@+id/vp"        android:layout_width="match_parent"        android:layout_height="200dp" /></LinearLayout>