viewpager+自动轮播+无线轮播+小圆点

package zss.bwei.com.weektwo2;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.bwei.imageloaderlibrary.utils.ImageLoaderUtils;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

List<String> list=new ArrayList<>();
List<ImageView> listimage=new ArrayList<>();
private ViewPager viewPager;
private LinearLayout linerlayout;
//线程进行自动轮播
public Handler handler = new Handler(){
    public void handleMessage(android.os.Message msg) {
        int currentItem = viewPager.getCurrentItem();
        //切换至下一个页面
        viewPager.setCurrentItem(++currentItem);
        //再次调用
        handler.sendEmptyMessageDelayed(1, 2000);
    };
};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    viewPager = (ViewPager) findViewById(R.id.viewpager);
    linerlayout = (LinearLayout) findViewById(R.id.linearLayout);
    initData();
   //添加小圆点
    addPoint();
    //适配数据
    spadapter();
    //进行无线轮播
    viewPager.setCurrentItem(list.size()*1000);
    //viewpager的点击监听
    viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }
        @Override
        public void onPageSelected(int position) {
            for (int i = 0; i <list.size(); i++) {
                //选中的页面改变小圆点为选中状态，反之为未选中
                if ((position %list.size()) == i) {
                    ((View)listimage.get(i)).setBackgroundResource(R.drawable.dot_normal);
                } else {
                    ((View)listimage.get(i)).setBackgroundResource(R.drawable.dot_focus);
                }
            }
        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });
    handler.sendEmptyMessageDelayed(1, 2000);
}

private void addPoint() {
    for (int i = 0; i <list.size(); i++) {
        ImageView imageView1 = new ImageView(this);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

        //为小圆点左右添加间距
        params.leftMargin = 10;
        params.rightMargin = 10;
        //手动给小圆点一个大小
        params.height =15;
        params.width =15;
        if (i == 0) {
            imageView1.setBackgroundResource(R.drawable.dot_normal);
        } else {
            imageView1.setBackgroundResource(R.drawable.dot_focus);
        }
        //为LinearLayout添加ImageView
        linerlayout.addView(imageView1, params);
       listimage.add(imageView1);
    }

}

private void spadapter() {
    MyAdapter myadapter=new MyAdapter();
    viewPager.setAdapter(myadapter);
}


private void initData() {
    list.add("http://l2.51fanli.net//tuan//images//1//5806eac956808.jpg");
    list.add("http://l2.51fanli.net//tuan//images//b//580991bb30560.jpg");
    list.add("http://l0.51fanli.net//tuan//images//b//58115f2593dc3.jpg");
    list.add("http://l2.51fanli.net//tuan//images//0//57923840b054d.jpg");
    list.add("http://l2.51fanli.net//tuan//images//e//58101e11ab164.jpg");
}

private class MyAdapter extends PagerAdapter{

    @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) {
        position=position%list.size();
        ImageView imageview = new ImageView(MainActivity.this);
        DisplayImageOptions options = ImageLoaderUtils.getOptions();
        ImageLoader.getInstance().displayImage(list.get(position),imageview,options);
        container.addView(imageview);

        return imageview;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        viewPager.removeView((View) object);
    }
}

}

//布局