您的位置：首页 > 其它

无限轮播

2016-06-13 16:55 260 查看

activity_maim.xml

<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="200dp"

     >

    <android.support.v4.view.ViewPager

        android:layout_width="match_parent"

        android:layout_height="fill_parent"

        android:id="@+id/vp" />

   <LinearLayout

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

     android:orientation="vertical"

     android:background="#708090"

     android:layout_alignParentBottom="true">

        <TextView

            android:gravity="center"

            android:id="@+id/tv_info"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:textSize="20sp"

            android:text="qqq"/>



        <LinearLayout

            android:id="@+id/ll_dot"

            android:gravity="center"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:orientation="horizontal">

        </LinearLayout>

     </LinearLayout>

</RelativeLayout>

vp_fouse.xml

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"

    android:shape="rectangle">

    <corners android:radius="10dp"/>

    <solid android:color="#f00"/>

</shape>

vp_normal.xml

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android"

    android:shape="rectangle">

    <corners android:radius="10dp"/>

    <solid android:color="#fff"/>

</shape>

adapter

package com.example.vp.adapter;

import java.util.List;

import com.example.vp.bean.ViewBean.Adlist;

import com.nostra13.universalimageloader.core.ImageLoader;

import android.content.Context;

import android.support.v4.view.PagerAdapter;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

public class MyPagerAdapter extends PagerAdapter {

   Context context;

   List<Adlist> list;

   public MyPagerAdapter(Context context, List<Adlist> list) {

       this.context=context;

       this.list=list;

   }

   @Override

   public int getCount() {

       return Integer.MAX_VALUE;

   }

   @Override

   public boolean isViewFromObject(View arg0, Object arg1) {

       return arg0==arg1;

   }

   @Override

   public void destroyItem(ViewGroup container, int position, Object object) {

       container.removeView((View) object);

   }

   @Override

   public Object instantiateItem(ViewGroup container, int position) {

       ImageView iv = new ImageView(context);

       container.addView(iv);

       ImageLoader.getInstance().displayImage(list.get(position%list.size()).img, iv);

       return iv;

   }

}

bean

package com.example.vp.bean;

import java.util.List;

public class ViewBean {

   public Data data;

   public String msg;

   public String status;



   public class Data{

       public List<Adlist> adlist;

   }



   public class Adlist {



       public String id;

       public String img;

       public String name;

       public String stype;

       public String title;

       public String url;



   }



}

NetWorkUTils

package com.example.vp.utils;

import java.io.IOException;

import org.apache.http.HttpResponse;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

public class NetWorkUtils {



   static String path ="http://www.meirixue.com/api.php?c=index&a=index";

   public static String getStr(){



       HttpClient client = new DefaultHttpClient();



       HttpGet get = new HttpGet(path);



       try {

           HttpResponse response = client.execute(get);

           int code = response.getStatusLine().getStatusCode();



           if(code==200){



               String json = EntityUtils.toString(response.getEntity());



               return json;

           }





       } catch (Exception e) {

           e.printStackTrace();

       }



       return null;

   }

}
activity

package com.example.vp;

import java.util.ArrayList;

import java.util.List;

import java.util.Timer;

import java.util.TimerTask;

import com.example.vp.adapter.MyPagerAdapter;

import com.example.vp.bean.ViewBean;

import com.example.vp.bean.ViewBean.Adlist;

import com.example.vp.utils.NetWorkUtils;

import com.google.gson.Gson;

import android.os.Bundle;

import android.app.Activity;

import android.support.v4.view.ViewPager;

import android.support.v4.view.ViewPager.OnPageChangeListener;

import android.view.Menu;

import android.view.View;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.LinearLayout.LayoutParams;

import android.widget.TextView;

public class MainActivity extends Activity {

   private ViewPager vp;

   private TextView tv_info;

   private LinearLayout ll_dot;

   private List<Adlist> list;

   private List<ImageView> alist=new ArrayList<ImageView>();

   @Override

   protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.activity_main);

       tv_info = (TextView) findViewById(R.id.tv_info);

       ll_dot=(LinearLayout)findViewById(R.id.ll_dot);

       vp=(ViewPager)findViewById(R.id.vp);

       initData();



   }

   private void initData() {

       new Thread(){

           private String str;

           public void run() {

               str = NetWorkUtils.getStr();

               runOnUiThread(new Runnable() {

                   @Override

                   public void run() {

                       Gson gson = new Gson();

                       ViewBean bean = gson.fromJson(str, ViewBean.class);

                       list = bean.data.adlist;

                       vp.setAdapter(new MyPagerAdapter(MainActiv
4000
ity.this,list));

//                       初始化小圆点

                       initDot();

                       vp.setCurrentItem(list.size()*2);

                       vpListen();

                       startTimer();

                   }

               });

           };

       }.start();

   }

   private void startTimer() {

       Timer tmr = new Timer();

       tmr.schedule(new TimerTask() {



           @Override

           public void run() {

               runOnUiThread(new Runnable() {



                   @Override

                   public void run() {

                       int currentItem = vp.getCurrentItem();

                       vp.setCurrentItem(++currentItem);

                   }

               });

           }

       }, 0, 2000);



   }

   private void vpListen() {

       vp.setOnPageChangeListener(new OnPageChangeListener() {



           @Override

           public void onPageSelected(int arg0) {

               for (int i = 0; i < alist.size(); i++) {

                   if(arg0%list.size()==i){

//                       viewpager的点和图片一致

                       alist.get(arg0%list.size()).setImageResource(R.drawable.vp_fouse);

                   }else{

                       alist.get(i).setImageResource(R.drawable.vp_normal);

                   }

                   tv_info.setText(list.get(arg0%list.size()).title);

               }



           }

           @Override

           public void onPageScrolled(int arg0, float arg1, int arg2) {



           }



           @Override

           public void onPageScrollStateChanged(int arg0) {



           }

       });

   }

   /**

   * 初始化小圆点

   */

   private void initDot() {

       if(alist!=null){

           alist.clear();

       }

       for (int i = 0; i < list.size(); i++) {

           ImageView iv = new ImageView(MainActivity.this);

           if(i==0){

//               小圆点选中

               iv.setImageResource(R.drawable.vp_fouse);

           }else{

               iv.setImageResource(R.drawable.vp_normal);

           }

           tv_info.setText(list.get(i).title);

           LayoutParams params=new LayoutParams(10, 10);

           params.setMargins(20, 0, 20, 0);

//           将圆点存到集合中

           alist.add(iv);

           ll_dot.addView(iv, params);

       }

   }



}

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签： 无限轮播

相关文章推荐

新的分享

章节导航