ViewPager无限循环定时翻页

1.准备填充ViewPager的fragment

public class ImageDetailFragment extends Fragment {

    private static final String IMAGE_DATA_EXTRA = "resId";
    private int mImageNum;
    private ImageView mImageView;

    static ImageDetailFragment newInstance(int imageNum) {
        final ImageDetailFragment f = new ImageDetailFragment();
        final Bundle args = new Bundle();
        args.putInt(IMAGE_DATA_EXTRA, imageNum);
        f.setArguments(args);
        return f;
    }

    // Empty constructor, required as per Fragment docs
    public ImageDetailFragment() {}

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mImageNum = getArguments() != null ? getArguments().getInt(IMAGE_DATA_EXTRA) : -1;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // image_detail_fragment.xml contains just an ImageView
        final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
        mImageView = (ImageView) v.findViewById(R.id.imageView);
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        final int resId = ImageDetailActivity.imageResIds[mImageNum];
        //对图片进行压缩,参见[bitmap加载](http://www.jianshu.com/p/fa67521c1e57)
        mImageView.setImageBitmap(ImageResizer.decodeSampledBitmapFromResource(getResources(),resId,100,100));
    }
}

2.ViewPager的Activity

public class ImageDetailActivity extends AppCompatActivity {

    private static final String TAG = "ImageDetailActivity";
    private ImagePagerAdapter mAdapter;
    private ViewPager mPager;
    private Handler mHandler;
    private static int mPosition;
    public static final int WHAT = 1001;

    public static final int COUNT = 300;

    public final static Integer[] imageResIds=new Integer[]{R.drawable.ho1,R.drawable.ho2,R.drawable.ho3,R.drawable.ho4,R.drawable.ho5,R.drawable.ho6 };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.image_detail_pager); // Contains just a ViewPager

        mAdapter = new ImagePagerAdapter(getSupportFragmentManager(), imageResIds.length*COUNT);
        mPager = (ViewPager) findViewById(R.id.pager);
        mPager.setAdapter(mAdapter);
        mPager.setCurrentItem(imageResIds.length*COUNT/2);
        mPosition=imageResIds.length*COUNT/2;
        mHandler=new MyHandler(mPager);
        mHandler.sendEmptyMessageDelayed(WHAT,3000);
        mPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }

            @Override
            public void onPageSelected(int position) {
                mPosition=position;
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }

    private static class MyHandler extends Handler
    {
        //使用静态内部类避免内存泄漏
        private   WeakReference mViewPagerWeakReference;
        public MyHandler(ViewPager viewPager)
        {
            mViewPagerWeakReference=new WeakReference(viewPager);
        }
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what)
            {
                case WHAT:
                    if (mViewPagerWeakReference.get()!=null)
                    {

                        mViewPagerWeakReference.get().setCurrentItem(mPosition+1);
                        sendEmptyMessageDelayed(WHAT,3000);
                        Log.d(TAG, "handleMessage: ");
                    }
                    break;
            }
        }
    }
    private static class ImagePagerAdapter extends FragmentStatePagerAdapter {
        private final int mSize;

        public ImagePagerAdapter(FragmentManager fm, int size) {
            super(fm);
            mSize = size;
        }

        @Override
        public int getCount() {
            return mSize;
        }


        @Override
        public Fragment getItem(int position) {
            return ImageDetailFragment.newInstance(position%imageResIds.length);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //移除消息避免一直运行
        mHandler.removeMessages(WHAT);
    }
}