Android PullToRefreshListView上拉刷新和下拉刷新

　　PullToRefreshListView实现上拉和下拉刷新有两个步骤：

　　1、设置刷新方式

     pullToRefreshView.setMode(PullToRefreshBase.Mode.BOTH);//两端刷新
     pullToRefreshView.setMode(PullToRefreshBase.Mode.PULL_FROM_START);//上拉刷新
     pullToRefreshView.setMode(PullToRefreshBase.Mode.PULL_FROM_END);//下拉刷新

　　2、如果是上拉刷新或者下拉刷新需要实现OnRefreshListener接口；如果是两端刷新，则setOnRefreshListener需要实现OnRefreshListener2接口

　　两端刷新实现：

pullToRefreshView = (PullToRefreshListView) view.findViewById(R.id.pull_to_refresh_listview);
        pullToRefreshView.setMode(PullToRefreshBase.Mode.BOTH);//两端刷新
//        pullToRefreshView.setMode(PullToRefreshBase.Mode.PULL_FROM_START);//上拉刷新
//        pullToRefreshView.setMode(PullToRefreshBase.Mode.PULL_FROM_END);//下拉刷新
        pullToRefreshView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {

            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                refreshType = REFRESH_TYPE_DOWN;
                refreshView.getLoadingLayoutProxy().setRefreshingLabel("正在加载");
                refreshView.getLoadingLayoutProxy().setPullLabel("下拉加载更多");
                refreshView.getLoadingLayoutProxy().setReleaseLabel("释放开始加载");
//                refreshView.getLoadingLayoutProxy().setLastUpdatedLabel("最后加载时间:");

                // Do work to refresh the list here.
                new GetDataTask().execute();
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                refreshType = REFRESH_TYPE_UP;
                refreshView.getLoadingLayoutProxy().setRefreshingLabel("正在加载");
                refreshView.getLoadingLayoutProxy().setPullLabel("上拉加载更多");
                refreshView.getLoadingLayoutProxy().setReleaseLabel("释放开始加载");
//                refreshView.getLoadingLayoutProxy().setLastUpdatedLabel("最后加载时间:");
                // Do work to refresh the list here.
                new GetDataTask().execute();
            }
        });

　　AsyncTask实现异步加载

private class GetDataTask extends AsyncTask<Void, Void, String[]> {
        @Override
        protected String[] doInBackground(Void... params) {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return new String[0];
        }

        @Override
        protected void onPostExecute(String[] result) {
            // Call onRefreshComplete when the list has been refreshed.
            pullToRefreshView.onRefreshComplete();

            if(REFRESH_TYPE_DOWN == refreshType){
                Article article = new Article();
                article.setTitle("下拉刷新添加title");
                adapter.insert(article,0);//adapter是一个LinkedList
            }else if(REFRESH_TYPE_UP == refreshType){
                Article article = new Article();
                article.setTitle("上拉刷新添加title");
                adapter.add(article);
            }

            super.onPostExecute(result);
        }
    }

　　如果想实现更丰富的效果可修改布局文件参数，如：

<!--
                 ptr:ptrDrawable="@drawable/default_ptr_flip"
                 ptr:ptrAnimationStyle="flip"  flip:翻转  rotate:旋转
        -->
        <!--     ptr:ptrShowIndicator="true"  右上角 右下角出现箭头-->
        <com.handmark.pulltorefresh.library.PullToRefreshListView
            android:id="@+id/pull_to_refresh_listview"
            android:layout_height="fill_parent"
            android:layout_width="fill_parent"
            ptr:ptrShowIndicator="true"
            android:background="#CCC" />