[英]ProgressDialog of AsyncTask
Hi I need to show summary progress of AsyncTask. 嗨,我需要显示AsyncTask的摘要进度。 I want to show ProgressBar or ProgressDialog of Downloading, but I have know idea what to do, I know how to show dialog, but only when I download one file, and how do when I have a lot of files to download.
我想显示正在下载的ProgressBar或ProgressDialog,但是我知道该怎么做,我知道如何显示对话框,但是仅当我下载一个文件时才知道,而当我有很多文件要下载时该怎么办。 Can somebody help????
有人可以帮忙吗???
Here is My AyncTaskClass 这是我的AyncTaskClass
public class DownloadProgramTask extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... sUrl) {
InputStream input = null;
OutputStream output = null;
HttpURLConnection connection = null;
try {
URL url = new URL(sUrl[0]);
String path = sUrl[1];
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return "Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage();
}
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
output = new FileOutputStream(path);
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
return null;
}
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
} catch (Exception e) {
return e.toString();
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
}
And I create new instance of that class for every execute, 我为每次执行创建该类的新实例,
File voiceFile = new File(dirVoice, a.getPose_id() + ".mp3");
if (!voiceFile.exists()) {
voiceList.add(a.getVoice());
new DownloadProgramTask().execute(MYurl.BASE_URL + a.getVoice(), voiceFile.getPath());
Log.e("LINK", MYurl.BASE_URL + a.getVoice());
Log.e("Path voice", "" + voiceFile.getPath());
}
File imgLargeFile = new File(dirImageLarge, a.getId() + ".png");
if (!imgLargeFile.exists()) {
imgLargeList.add(a.getVoice());
new DownloadProgramTask().execute(MYurl.BASE_URL + "/" + a.getImgLarge(), imgLargeFile.getPath());
}
you can use the overridden method OnProgressUpdate of Async Task. 您可以使用异步任务的重写方法OnProgressUpdate。 call publishProgress in doingBackground of asynctask with interger
使用interger在异步任务的doingBackground中调用publishProgress
something like this.. 像这样
@Override @Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
Log.i("makemachine", "onProgressUpdate(): " +
percentBar.setProgress((values[0] * 2) + "%");
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.