android ProgressBar在下载过程中更新

在我的文件下载应用程序中，有一个 ListView，每一行都包含属性文件和一个用于下载其状态的进度栏，我使用视图持有者模式，但进度栏不更新

@Override
    protected void onProgressUpdate(Long... values) {
        ProgressBar bar1;
        TextView status1;
        DownloadStructure.setProgress(values[0].intValue());
        bar1 = DownloadStructure.getProgressBarRefrence();
        if (bar1 != null) {
            bar1.setVisibility(View.VISIBLE);
            bar1.setMax(values[2].intValue());
            bar1.setProgress(DownloadStructure.getProgress());
            bar1.Invalidate();
        }
        status1 = DownloadStructure.getProgressTextviewRefrence();
        if (status1 != null) {
            status1.setVisibility(View.VISIBLE);
            status1.setText(DownloadStructure.getDownloadStatus());
            status1.postInvalidate();
        }
    }

尝试打电话notifyDataSetChanged :

        protected void onPostExecute(Boolean result) {
            ...
            myListView.notifyDataSetChanged(); //or simply notifyDataSetChanged if your Async inside adapter
        }