無限輪播的適配器

public class MyPagerAdapter extends PagerAdapter {


    Context context;
    List<Adlist> listData;
    Handler handler;
    public MyPagerAdapter(Context context, List<Adlist> listData, Handler handler) {

        this.context = context;
        this.listData = listData;
        this.handler = handler;
    }


    @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) {

        //5 6 7 8
        //0%4  = 0
        //5%4 = 1
        View view = View.inflate(context, R.layout.vp_item, null);

        ImageView vp_iv = (ImageView) view.findViewById(R.id.vp_iv);

        vp_iv.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {

                switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:  //手指按下的事件
                    //全部取消
                    handler.removeCallbacksAndMessages(null);
                    break;
                case MotionEvent.ACTION_UP:  //手指擡起的事件
                    handler.sendEmptyMessageDelayed(1, 2000);
                    break;

                case MotionEvent.ACTION_CANCEL:  //取消的事件
                    handler.sendEmptyMessageDelayed(1, 2000);
                    break;

                }

                //true自己消費，false繼續往下傳
                return true;
            }
        });


        ImageLoader.getInstance().displayImage(listData.get(position%listData.size()).img, vp_iv);

        container.addView(view);

        return view;
    }
}