我有一个被fragment调用的类。在进度更新时,消息不会更新。我也没有看到任何进度条或旋转器,只有标题和消息。看到了一些类似的问题,但没有一个进度条完全没有显示的情况。此外,在onProgressUpdate中我的消息根本没有更新,但打印出的值表明它在onProgressUpdate内部递增。
编辑:这是我如何启动任务
编辑:这是我如何启动任务
DownloadFilesTask download = new DownloadFilesTask();
download.execute(urls.toArray(new String[urls.size()]));
这里是类
private class DownloadFilesTask extends AsyncTask<String, Integer, Long> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute()
{
progressDialog = ProgressDialog.show(getActivity(), "Downloading","Downloaded 0/"+urls.size(), false);
progressDialog.setProgress(0);
progressDialog.setMax(urls.size());
progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
}
@Override
protected Long doInBackground(String[] urls) {
int count = urls.length;
long totalSize = 0;
for (int i = 0; i < count; i++) {
//Do things in background here
publishProgress(new Integer[] {i});
}
return totalSize;
}
@Override
protected void onProgressUpdate(final Integer... progress) {
System.out.println(progress[0]); //This does print correctly
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
progressDialog.setProgress(progress[0]);
progressDialog.setMessage("Downloaded "+ progress[0] +"/"+urls.size());
}
});
}
@Override
protected void onPostExecute(Long result) {
progressDialog.dismiss();
Toast t = Toast.makeText(getActivity(), "Downloaded", Toast.LENGTH_LONG);
t.show();
}
}