ViewPager 无限轮滑

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public class MainActivity extends AppCompatActivity {        String uri="https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=6&page=1";        int i = 0;        List<ImageBean.NewslistBean> list = new ArrayList<ImageBean.NewslistBean>();    Handler handler=new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            adapter.notifyDataSetChanged();            int what = msg.what;                switch(what){                        case 0:                        adapter.notifyDataSetChanged();                        break;                        case 1:                            adapter.notifyDataSetChanged();                            int aaa = (int) msg.obj;                            if(list.size()!=0) {                                vp.setCurrentItem(aaa % list.size());                            }                        break;                    }        }    };    private MyAdapter adapter;    private ImageLoader instance;    private ViewPager vp;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        vp = (ViewPager) findViewById(R.id.vp);        instance = ImageLoader.getInstance();        adapter = new MyAdapter();        vp.setAdapter(adapter);        respart();        lunbu();    }    private void lunbu() {        new Thread(){            @Override            public void run() {                super.run();                while(true){                    Message msg=new Message();                    msg.what=1;                    i++;                    msg.obj=i;                    handler.sendMessage(msg);                    SystemClock.sleep(1000);                }            }        }.start();    }    private void respart() {        new Thread(){            @Override            public void run() {                super.run();                try {                    URL url = new URL(uri);                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();                    InputStream inputStream = urlConnection.getInputStream();                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));                    String line=null;                    StringBuffer sb=new StringBuffer();                    while((line=bufferedReader.readLine())!=null){                        sb.append(line);                    }                    Gson gson=new Gson();                    ImageBean imageBean = gson.fromJson(sb.toString(), ImageBean.class);                    List<ImageBean.NewslistBean> newslist = imageBean.getNewslist();                    list.addAll(newslist);                    Message msg=new Message();                    msg.what=0;                    handler.sendMessage(msg);                } catch (MalformedURLException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }.start();    }    class MyAdapter extends PagerAdapter{        @Override        public int getCount() {            return 5000;        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view==object;        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View) object);        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            View view = View.inflate(MainActivity.this, R.layout.activity_list, null);            ImageView imageView = view.findViewById(R.id.iv_li);            TextView textView = view.findViewById(R.id.tv_li);            if(list.size()!=0) {                textView.setText(list.get(position % list.size()).getTitle());                instance.displayImage(list.get(position % list.size()).getPicUrl(), imageView);            }            container.addView(view);            return view;        }    }}
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