实现进度对话框，其中要下载的图像数量超过 1
我想在从服务器下载图像时显示进度对话框。我能够下载图像并实现进度对话框，但我的问题是进度对话框不会被关闭，它只显示最后下载的图像。
我正在使用以下代码：
public class BackgroundAsyncTask extends AsyncTask<String, Integer, Bitmap> {
int myProgress;
@Override
protected void onPostExecute(Bitmap result) {
image.setVisibility(View.VISIBLE);
image.setImageBitmap(result);
if(dialog.isShowing())
{
dialog.dismiss();
}
return;
}
protected void onPreExecute() {
dialog = ProgressDialog.show(ProfilePageNormalUser.this,
"Loading...", "Please wait...");
}
@Override
protected Bitmap doInBackground(String... paths) {
return DownloadFile(imageUrl);
}
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
progressBar.setProgress(values[0]);
}
}
以及以下代码来调用这些：
new BackgroundAsyncTask().execute(imageUrl);
任何人都可以告诉我可能是什么问题吗 谢谢
I want to show progress dialog at the time images are being downloaded from server. i am able to download the images and implement the progress dialog but my problem is that the progress dialog doesnot get dismissed and it only shows the last downloaded image.
I am using the following code for that :
public class BackgroundAsyncTask extends AsyncTask<String, Integer, Bitmap> {
int myProgress;
@Override
protected void onPostExecute(Bitmap result) {
image.setVisibility(View.VISIBLE);
image.setImageBitmap(result);
if(dialog.isShowing())
{
dialog.dismiss();
}
return;
}
protected void onPreExecute() {
dialog = ProgressDialog.show(ProfilePageNormalUser.this,
"Loading...", "Please wait...");
}
@Override
protected Bitmap doInBackground(String... paths) {
return DownloadFile(imageUrl);
}
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
progressBar.setProgress(values[0]);
}
}
and the following for calling these:
new BackgroundAsyncTask().execute(imageUrl);
Can anyone tall me what could be the problem
Thanks
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您必须调用 publishProgress() 在每张图像之后。然后，
publishProgress()将在 UI 线程上调用onProgressUpdate()。You have to call publishProgress() after each image.
publishProgress()will then callonProgressUpdate()on the UI thread.