使用Android-PullToRefresh实现下拉刷新功能

源代码：https://github.com/chrisbanes/Android-PullToRefresh

一. 导入类库

将Library文件夹作为Android项目Import到Eclipse。
在要用的项目上右键Properties，Android一栏，Add。

二. Layout

将ListView取代为PullToRefreshListView：

<com.handmark.pulltorefresh.library.PullToRefreshListView 

android:id="@+id/pull_to_refresh_listview" 

android:layout_height="fill_parent"  

android:layout_width="fill_parent" />

三. Activity

// Set a listener to be invoked when the list should be refreshed.

PullToRefreshListView pullToRefreshView = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_listview);

pullToRefreshView.setOnRefreshListener(new OnRefreshListener<ListView>() {

    @Override

    public void onRefresh(PullToRefreshBase<ListView> refreshView) {

        // Do work to refresh the list here.

        new GetDataTask().execute();

    }

});

 

private class GetDataTask extends AsyncTask<Void, Void, String[]> {

    ...

    @Override

    protected void onPostExecute(String[] result) {

        // Call onRefreshComplete when the list has been refreshed.

        pullToRefreshView.onRefreshComplete();

        super.onPostExecute(result);

    }

}

四. 取得内部控件

The first thing to know about this library is that it is a wrapper around the existing View classes.
 So if you use this library and want to get access to the internal ListView/GridView/etc then simply call getRefreshableView(). You can then call all of your usual methods such as setOnClickListener() etc.