Android实现ViewPage轮播图效果

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package com.yzp.viewpagedemo;

import android.content.Context;
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;

public class MainActivity extends AppCompatActivity {

  private ViewPager ViewPage_Detail;
  private LinearLayout point_detail;
  private Context context;
  private View view;
  //轮播图图片资源
  private final int[] viewpage_images = {R.mipmap.two, R.mipmap.three, R.mipmap.four, R.mipmap.fifve};
  private ArrayList viewpage_imageList;
  //判断是否自动滚动ViewPage
  private boolean isRunning = true;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Instantiation();

  }

  public void Instantiation() {

    ViewPage_Detail = (ViewPager)findViewById(R.id.ViewPage_Detail);
    point_detail = (LinearLayout)findViewById(R.id.point_detail);

    //初始化图片资源
    viewpage_imageList = new ArrayList();
    for (int i : viewpage_images) {
      // 初始化图片资源
      ImageView imageView = new ImageView(this);
      imageView.setBackgroundResource(i);
      viewpage_imageList.add(imageView);

      // 添加指示小点
      ImageView point = new ImageView(this);
      LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(15,
          15);
      params.rightMargin = 10;
      params.bottomMargin = 15;
      point.setLayoutParams(params);
      point.setBackgroundResource(R.mipmap.light_blue_point);
      if (i == R.mipmap.two) {
        //默认聚焦在第一张
        point.setBackgroundResource(R.mipmap.blue_point);
        point.setEnabled(true);
      } else {
        point.setEnabled(false);
      }

      point_detail.addView(point);

    }

    //首页轮播
    CarouselShow carouselShow = new CarouselShow(context, viewpage_imageList);
    carouselShow.CarouselShow_Info_Detail(this);
    handler.sendEmptyMessageDelayed(0, 3000);

  }

  private Handler handler = new Handler() {
    public void handleMessage(Message msg) {
      // 执行滑动到下一个页面
      ViewPage_Detail.setCurrentItem(ViewPage_Detail.getCurrentItem() + 1);
      if (isRunning) {
        // 在发一个handler延时
        handler.sendEmptyMessageDelayed(0, 3000);
      }
    }
  };


  @Override
  public void onDestroy() {
    // 停止滚动
    isRunning = false;
    super.onDestroy();
  }

}

package com.yzp.viewpagedemo;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.widget.ImageView;
import android.widget.LinearLayout;

import java.util.ArrayList;

/**
 * 轮播展示公共类
 * 作者: yzp on 2016-09-07.
 * E-mail: 15111424807@163.com
 * QQ: 486492302
 */
public class CarouselShow {

  private final Context context;
  private LinearLayout point_group;
  private ArrayList viewpage_imageList;
  protected int lastPosition = 0;
  private ViewPager ViewPage_Detail;
  private LinearLayout point_detail;

  public CarouselShow(Context context, ArrayList viewpage_imageList) {
    this.cOntext= context;
    this.viewpage_imageList = viewpage_imageList;
  }

  /**
   * 当需要多个轮播功能的时候 建立一个类来调用 并实现此方法
   */
  public void CarouselShow_Info_Detail(MainActivity view){

    ViewPage_Detail = (ViewPager)view.findViewById(R.id.ViewPage_Detail);
    point_detail = (LinearLayout) view.findViewById(R.id.point_detail);
    ViewPage_Detail.setAdapter(new TeaNetPageAdapter(viewpage_imageList));

    // 设置当前viewPager的位置
    ViewPage_Detail.setCurrentItem(Integer.MAX_VALUE / 2
        - (Integer.MAX_VALUE / 2 % viewpage_imageList.size()));

    ViewPage_Detail.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
      @Override
      public void onPageSelected(int position) {
        // 页面切换后调用， position是新的页面位置
        // 实现无限制循环播放
        position %= viewpage_imageList.size();

        // 把当前点设置为true,将上一个点设为false；并设置point_group图标
        point_detail.getChildAt(position).setEnabled(true);
        point_detail.getChildAt(position).setBackgroundResource(R.mipmap.blue_point);//设置聚焦时的图标样式
        point_detail.getChildAt(lastPosition).setEnabled(false);
        point_detail.getChildAt(lastPosition).setBackgroundResource(R.mipmap.light_blue_point);//上一张恢复原有图标
        lastPosition = position;
      }
      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

      }
      @Override
      public void onPageScrollStateChanged(int state) {

      }
    });

  }
}

package com.yzp.viewpagedemo;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import java.util.ArrayList;

/**
 * 作者: yzp on 2016-09-07.
 * E-mail: 15111424807@163.com
 * QQ: 486492302
 */
public class TeaNetPageAdapter extends PagerAdapter {

  private ArrayList viewpage_imageList;

  public TeaNetPageAdapter(ArrayList viewpage_imageList) {

    this.viewpage_imageList = viewpage_imageList;

  }
  // 需要实现以下四个方法

  @Override
  public int getCount() {
    return Integer.MAX_VALUE;
  }

  @Override
  public boolean isViewFromObject(View view, Object object) {
    // 判断view和Object对应是否有关联关系
    if (view == object) {
      return true;
    } else {
      return false;
    }
  }

  @Override
  public Object instantiateItem(ViewGroup container, int position) {
    // 获得相应位置上的view； container view的容器，其实就是viewpage自身,
    // position: viewpager上的位置
    // 给container添加内容
    container.addView(viewpage_imageList.get(position % viewpage_imageList.size()));

    return viewpage_imageList.get(position % viewpage_imageList.size());
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
    // 销毁对应位置上的Object
    // super.destroyItem(container, position, object);
    container.removeView((View) object);
    object = null;
  }
}