Question

我已经实现了一个listview，其中包含来自url的解析数据，我已经使用了懒惰的适配器。现在我希望列表中的conatins pull to refresh属性但我的问题是我无法找到正确的方法实现这一点，PLZ帮助

我的列表视图XML是： -

 <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/upBar" >

        <ListView
            android:id="@+id/latestList"
            android:layout_width="fill_parent"
            android:layout_height="match_parent"
            android:cacheColorHint="#00000000"
            android:listSelector="#00000000"
            android:padding="7dp"
            android:scrollbars="none" />
    </RelativeLayout>

我的懒惰适配器是这样的： -

public class LazyAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<String> movieThumbnail;
    private ArrayList<String> movieText;
    private static LayoutInflater inflater=null;
    static File cacheDir;


    ImageLoader imageloader = new ImageLoader(activity);

    public LazyAdapter(Activity a, ArrayList<String> movieThumbnail, ArrayList<String> movieText) {
        activity = a;
        /*data=d;*/
        this.movieThumbnail = movieThumbnail;
        this.movieText = movieText;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);



    }

    public int getCount() {
        return movieText.size();
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi=convertView;
        if(convertView==null)
              vi = inflater.inflate(R.layout.listrow, null);

        TextView text=(TextView)vi.findViewById(R.id.rowListTextView);
        ImageView image=(ImageView)vi.findViewById(R.id.movieImage);
        text.setText(movieText.get(position));
        imageloader.DisplayImage(movieThumbnail.get(position), image);

        return vi;
    }

    public void clear(){
        imageloader.clearCache();
    }

我正在AsyncTask中设置延迟适配器，如下所示： -

@Override protected void onPostExecute(ArrayList<HashMap<String, String>> result) {


            lazyAdapter = new LazyAdapter(context, imgLinks, latestData);
            listView.setAdapter(lazyAdapter);}

Answer 1

这是一个很好的教程，您可以使用它来执行此操作：

http://sharedstate.net/archives/pull-to-refresh

Answer 2

您可以使用 Pull to Refresh Views for Android 库

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

拉动列表视图中的刷新

2 个答案: