小圆点

最新推荐文章于 2021-08-11 17:09:07 发布

g471045770

最新推荐文章于 2021-08-11 17:09:07 发布

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本文链接：https://blog.youkuaiyun.com/g471045770/article/details/51798433

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import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

import com.bawei.test.adapter.ViewPagerAdapter;
import com.bawei.test.bean.Data;
import com.bawei.test.bean.Like;

public class TwoActivity extends Activity {

   private ViewPager vp;
   private LinearLayout ll;
   private ArrayList<Like> list;
   ArrayList<ImageView> views = new ArrayList<ImageView>();

   //handler实现ViewPager轮播
   Handler handler=new Handler(){
       public void handleMessage(android.os.Message msg) {
           int item = vp.getCurrentItem();
           item++;
           vp.setCurrentItem(item);
           handler.sendEmptyMessageDelayed(0, 1800);
       };
   };
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_two);

       //获取第一个页面传来的值
       Intent intent = getIntent();
       Bundle bundle = intent.getExtras();
       Data data = (Data) bundle.getSerializable("data");

       //获得所需控件
       vp = (ViewPager) findViewById(R.id.vp);
       ll = (LinearLayout) findViewById(R.id.ll);
       list = data.like_user_list;
       //初始化小圆点
       init();
       //ViewPager加载适配器
       vp.setAdapter(new ViewPagerAdapter(list, this));
       //ViewPager监听
       vp.setOnPageChangeListener(new OnPageChangeListener() {

           @Override
           public void onPageSelected(int arg0) {
               // TODO Auto-generated method stub
               for (int i = 0; i < list.size(); i++) {
                   if (i == arg0%views.size()) {
                       views.get(i).setImageResource(R.drawable.selected);
                   } else {
                       views.get(i).setImageResource(R.drawable.select);
                   }
               }
           }

           @Override
           public void onPageScrolled(int arg0, float arg1, int arg2) {
               // TODO Auto-generated method stub

           }

           @Override
           public void onPageScrollStateChanged(int arg0) {
               // TODO Auto-generated method stub

           }
       });
       handler.sendEmptyMessageDelayed(0, 1800);
   }

   //小圆点的方法
   private void init() {
       for (int i = 0; i < list.size(); i++) {
           ImageView view = new ImageView(this);
           if (i == 0) {
               view.setImageResource(R.drawable.selected);
           } else {
               view.setImageResource(R.drawable.select);
           }
           LayoutParams params = new LayoutParams(10, 10);
           params.setMargins(10, 10, 10, 10);
           ll.addView(view, params);
           views.add(view);
       }

   }

}

import java.util.ArrayList;

import com.bawei.test.bean.Like;
import com.lidroid.xutils.BitmapUtils;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
/**
* ViewPager适配器类
* */
public class ViewPagerAdapter extends PagerAdapter {

   ArrayList<Like>list;
   Context context;

   public ViewPagerAdapter(ArrayList<Like> list, Context context) {
       this.list = list;
       this.context = context;
   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return Integer.MAX_VALUE;
   }

/**
*
* 请求数据的工具类
* */
public class HttpUtil {


   public static String getJson(String uri){
       String json="";
       try {
           URL url=new URL(uri);

           HttpURLConnection conn = (HttpURLConnection) url.openConnection();

           InputStream is = conn.getInputStream();

           BufferedReader reader=new BufferedReader(new InputStreamReader(is));

           String line;

           while(   (line=reader.readLine())!=null ){
               json+=line;
           }
       } catch (MalformedURLException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }




       return json;
   }
}
   @Override
   public boolean isViewFromObject(View arg0, Object arg1) {
       // TODO Auto-generated method stub
       return arg0==arg1;
   }

   @Override
   public void destroyItem(ViewGroup container, int position, Object object) {
       // TODO Auto-generated method stub
       container.removeView((View) object);
   }

   @Override
   public Object instantiateItem(ViewGroup container, int position) {
       // TODO Auto-generated method stub
       ImageView view=new ImageView(context);
       view.setScaleType(ScaleType.FIT_XY);
       BitmapUtils bitmapUtils=new BitmapUtils(context);
       bitmapUtils.display(view, list.get(position%list.size()).head_img);

       container.addView(view);

       return view;
   }

res/drawable

res/values/dimes