Android ListView实现无限循环滚动

供大家参考，具体内容如下

因项目需要循环展示列表数据，所以就实现了这个无限循环滚动的 LIstView.先说一下原理，原理呢，其实很简单，首先将要展示的数据循环展示三遍

Android ListView实现无限循环滚动

监听ListView的滚动事件，当ListView滚动到第一遍第第二个时，ListView变自动跳到第二遍的第二个，同理，如果ListView滚动到倒数第一个时，ListView自动跳转到第二遍的倒数第一个，然后可以不停的向上或者向下滑动，永远不会到头，废话少说，上

代码：

让ListView循环三遍展示

首先利用取余的方法，将List里面的数据循环展示

public class ListAdapter extends BaseAdapter {
    private List<String> list;
    private LayoutInflater mInflater;
    public ListAdapter(Context context, List<String> list){
        this.list = list;
        this.mInflater = LayoutInflater.from(context);
    }
    /**
     * 将数据循环展示三遍
     */
    @Override
    public int getCount() {
        if(list != null){
            return list.size() * 3;
        }
        return 0;
    }
    @Override
    public Object getItem(int arg0) {
        return list.get(arg0 % list.size());
    }
    @Override
    public long getItemId(int arg0) {
        return arg0 % list.size();
    }
    @Override
    public View getView(int postition, View convertView, ViewGroup arg2) {
        ViewHoler viewHolder = null;
        if(convertView == null){
            viewHolder = new ViewHoler();
            convertView = mInflater.inflate(R.layout.adapter_list_layout, null);
            viewHolder.tvText = (TextView) convertView.findViewById(R.id.adapter_list_layout_tv);
            convertView.setTag(viewHolder);
        }else{
            viewHolder = (ViewHoler) convertView.getTag();
        }
        viewHolder.tvText.setText(list.get(postition % list.size()));//取余展示数据
        return convertView;
    }
    static class ViewHoler{
        TextView tvText;
    }
}

然后实现监听ListView的滚动事件

public class MainActivity extends Activity implements OnScrollListener {
    private ListView listView;
    private List<String> list;
    private ListAdapter adapter;
    // private LinearLayout linear;
//
// private int stopPosition;
// private int firstViewHeight;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = (ListView) findViewById(R.id.listView1);
        list = getList();
        adapter = new ListAdapter(this, list);
        listView.setAdapter(adapter);
        listView.setOnScrollListener(this);
        listView.setSelection(list.size());
    }
    /**
     * 获取数据
     * @return
     */
    public List<String> getList(){
        List<String> list = new ArrayList<String>();
        for (int i = 0; i < 10; i++) {
            list.add(String.valueOf(i));
        }
        return list;
    }
    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
    }
    /**
     * 设置滚动监听，当滚动到第二个时，跳到地list.size()+2个，滚动到倒数第二个时，跳到中间第二个，setSelection时，
     * 由于listView滚动并未停止，所以setSelection后会继续滚动，不会出现突然停止的现象
     */
    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
                         int visibleItemCount, int totalItemCount) {
/**到顶部添加数据关键代码*/
        if (firstVisibleItem <= 2) {
            listView.setSelection(list.size() + 2);
        } else if (firstVisibleItem + visibleItemCount > adapter.getCount() - 2) {//到底部添加数据
            listView.setSelection(firstVisibleItem - list.size());
        }
    }
}

就是这么简单，嘿嘿，表达能力有点欠缺，不知到你看懂没，没看懂的话，
后面附上源码：Android无限循环滚动