android viewPager 自動播放

package com.weidingqiang.custommooc.views.allcourse;

import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.weidingqiang.custommooc.R;
import com.weidingqiang.custommooc.utils.DisplayUtil;
import com.weidingqiang.custommooc.views.widgets.GuidePointGroup;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.LogRecord;

/**
 * Created by weidingqiang on 15/11/26.
 */
public class HomeViewPager extends RelativeLayout{

    private ViewPager viewPager;

    private GuidePointGroup guidePointGroup;

    private TextView textView;

    private int[] imgIds;
    private List<ImageView> imageViews ;

    private RelativeLayout textlayout;

    private boolean isLoop = true;



    private Handler handler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);

            viewPager.setCurrentItem(viewPager.getCurrentItem() + 1);
        }
    };

    public HomeViewPager(Context context) {
        this(context, null);
    }

    public HomeViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);

        LayoutInflater layoutInflater = LayoutInflater.from(context);
        layoutInflater.inflate(R.layout.home_viewpager, this, true);

        initData();
        initView();
        initEvent();
        initAuto();
    }

    private void initView(){
        viewPager = (ViewPager) this.findViewById(R.id.home_viewPager);
        textlayout = (RelativeLayout) this.findViewById(R.id.text_layout);
        textView = (TextView) this.findViewById(R.id.home_textview);

        guidePointGroup = new GuidePointGroup(getContext(),imgIds.length);
        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        layoutParams.addRule(RelativeLayout.CENTER_VERTICAL);
        layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        layoutParams.rightMargin = DisplayUtil.dip2px(getContext(), 10);
        textlayout.addView(guidePointGroup, layoutParams);

    }

    private void initData(){
        imgIds = new int[] { R.mipmap.home_1,R.mipmap.home_2,
                R.mipmap.home_3,R.mipmap.home_4};
        imageViews = new ArrayList<ImageView>();

        for (int imgId : imgIds)
        {
            ImageView imageView = new ImageView(getContext());
            imageView.setScaleType(ImageView.ScaleType.FIT_XY);
            imageView.setImageResource(imgId);
            imageViews.add(imageView);
        }
    }

    private void initEvent(){
        viewPager.setAdapter(pagerAdapter);

        viewPager.addOnPageChangeListener(onPageChangeListener);

        /**
         * 2147483647 / 2 = 1073741820 - 1
         * 設置ViewPager的當前項爲一個比較大的數，以便一開始就能夠左右循環滑動
         */
        int n = Integer.MAX_VALUE / 2 % imageViews.size();
        int itemPosition = Integer.MAX_VALUE / 2 - n;

        viewPager.setCurrentItem(itemPosition);
    }

    private void initAuto(){
        // 自動切換頁面功能
        new Thread(new Runnable() {

            @Override
            public void run() {
                while (isLoop) {
                    SystemClock.sleep(8000);
                    handler.sendEmptyMessage(0);
                }
            }
        }).start();
    }

    /**
     * PagerAdapter 監聽器
     */
    private PagerAdapter pagerAdapter = new PagerAdapter() {
        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            container.addView(imageViews.get(position % imageViews.size()));
            return imageViews.get(position % imageViews.size());
        }

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

        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view == object;
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView(imageViews.get(position % imageViews.size()));
        }
    };

    /**
     * OnPageChangeListener 監聽器
     */
    private ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {
            int current = position % imageViews.size();
            guidePointGroup.changeSelectView(current);
        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    };

    public void destroy(){
        isLoop = false;
    }
}