我有一个progressbars个fragment，它们会添加到asynctask中，并在progressbar中更新。现在我想在完成后替换并重置asynctask。我开始使用新的UI来获取其他相关内容，并更新其postexecute中的//my asynctask to update the progressbar
@Override
protected Integer doInBackground(String... arg0) {
// TODO Auto-generated method stub
// display the images in now playing
while (ScheduleManager.isScheduleRunning) {
Iterator iterator = nowPlayingMediaSet.entrySet().iterator();
// set images on now playing
for (int i = 0; i < btnImgNowPlaying.length && iterator.hasNext(); ++i) {
Map.Entry mEntry = (Map.Entry) iterator.next();
Show mShowNowPlaying = (Show) mEntry.getKey();
// get show status
mProgressStatus[i] = ScheduleManager
.getCurrentPlayingShowStatus(mShowNowPlaying);
if (mProgressStatus[i] > 100) {
this.newSchedule = (ChannelSchedule) mEntry
.getValue();
// get now playing show and replace it
this.newShow = ScheduleManager
.getNowPlayingShow(newSchedule.getListOfShows());
iterator.remove();
final int index = i;
FragmentTvGuide.GetParentActivity().runOnUiThread(
new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
new ScheduleListnerTask(
btnImgNowPlaying[index])
.execute(newShow
.getShowThumb()); //does not get invoked
}
});
this.newShowAdded = true;
}
// Update the progress bar
}
if (newShowAdded){
this.nowPlayingMediaSet.put(newShow, newSchedule);
newShowAdded = false;
}
publishProgress(mProgressStatus);
// sleep 1 second to show the progress
try {
Thread.sleep(20000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return null;
}
//this is how get the parentactivity from fragment
//in onactivitycreated
context = getActivity(); //context is static
public static Activity GetParentActivity(){
return (Activity) context;
}
。我就是这样做的：
asynctask我不知道这里出了什么问题？有什么想法吗？
修改
这是我试图调用的public class ScheduleListnerTask extends AsyncTask<String, Void, Bitmap> {
ImageButton btnImage;
public ScheduleListnerTask(ImageButton btnImage){
this.btnImage = btnImage;
}
@Override
protected Bitmap doInBackground(String... params) {
// TODO Auto-generated method stub
String urldisplay = params[0];
Bitmap mIcon11 = null;
ImageLoader iLoader = ImageLoader.getInstance();
try {
mIcon11 = iLoader.loadImageSync(urldisplay);
} catch (Exception e) {
Log.e("Error", "image download error");
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
@Override
protected void onPostExecute(Bitmap result) {
// TODO Auto-generated method stub
btnImage.setImageBitmap(result);
}
}
：
{{1}}
答案 0 :(得分：1)
我想你忘记在新任务上调用execute（）了... 编辑：好的抱歉，你没有......
然而，我发现在另一个异步任务中通过在UIthread上运行它来开始一个新的asynctask一点点...我为什么不在此时发布进度，并从onprogressupdated开始新的任务...... ？