我有下载mp3的asynctask,我在状态栏中有一个自定义扩展通知,带有进度条和textview。问题是我无法让他们更新。这是我的尝试,我做错了什么?
public class DownloadFile extends AsyncTask<Void, Integer, String> {
/*public WebRequest(Context context,
String ProgressTitle, String ProgressMessage) {
this._context = context;
this._title = ProgressTitle;
this._message = ProgressMessage;
}*/
ProgressBar progressBar;
private int progress = 0;
NotificationManager notificationManager;
Notification notification2;
private static final int PROGRESS = 0x1;
private static final int MAX_PROGRESS = 100;
int downloadedSize;
int totalSize;
@Override
protected void onPreExecute() {
/*SDCardRoot = Environment.getExternalStorageDirectory() + "/download/";
Intent in = new Intent(mainmenu.this, DownloadService.class);
in.putExtra("url", SDCardRoot);
in.putExtra("songname", filename3);
startService(in);*/
// get the layout
//setContentView(R.layout.download_progress);
// configure the intent
Intent intent = new Intent();
final PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);
// configure the notification
notification2 = new Notification(R.drawable.download, "DOWNLOADING: " + filename3, System
.currentTimeMillis());
notification2.flags = notification2.flags | Notification.FLAG_ONGOING_EVENT;
notification2.contentView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.download_progress);
notification2.contentIntent = pendingIntent;
notification2.contentView.setTextViewText(R.id.percentage,"hi" );
notification2.contentView.setTextViewText(R.id.status_text, "DOWNLOADING: " + filename3);
notification2.contentView.setProgressBar(R.id.status_progress, 100, progress, false);
getApplicationContext();
notificationManager = (NotificationManager) getApplicationContext().getSystemService(
Context.NOTIFICATION_SERVICE);
notificationManager.notify(2, notification2);
}
@Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
//set the download URL, a url that points to a file on the internet
//this is the file to be downloaded
URL url = songURL2;
//create the new connection
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//set up some things on the connection
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
//and connect!
urlConnection.connect();
//set the path where we want to save the file
//in this case, going to save it on the root directory of the
//sd card.
SDCardRoot = Environment.getExternalStorageDirectory() + "/download/";
//create a new file, specifying the path, and the filename
//which we want to save the file as.
File file = new File(SDCardRoot,filename3);
//this will be used to write the downloaded data into the file we created
FileOutputStream fileOutput = new FileOutputStream(file);
//this will be used in reading the data from the internet
InputStream inputStream = urlConnection.getInputStream();
//this is the total size of the file
Integer totalSize = urlConnection.getContentLength();
//variable to store total downloaded bytes
Integer downloadedSize = 0;
//create a buffer...
byte[] buffer = new byte[1024];
int bufferLength = 0; //used to store a temporary size of the buffer
//now, read through the input buffer and write the contents to the file
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
//add the data in the buffer to the file in the file output stream (the file on the sd card
fileOutput.write(buffer, 0, bufferLength);
//add up the size so we know how much is downloaded
downloadedSize += bufferLength;
//this is where you would do something to report the prgress, like this maybe
//updateProgress(downloadedSize, totalSize);
publishProgress(downloadedSize/totalSize);
}
//close the output stream when done
fileOutput.close();
return "Success";
//catch some possible errors...
} catch (MalformedURLException e) {
e.printStackTrace();
return "Failed";
} catch (IOException e) {
e.printStackTrace();
return "Failed";
}
}
protected void onProgressUpdate(Integer... progress) {
notification2.contentView.setProgressBar(R.id.status_progress, 100, progress[0], false);
String stringy = progress + "%";
TextView textytext = (TextView) findViewById(R.id.percentage);
textytext.setText(stringy);
notificationManager.notify(2, notification2);
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
notificationManager.cancel(2);
}
}
}
答案 0 :(得分:1)
您始终发布0,因为您使用Integer
进行了进度并且已下载了尺寸
将其更改为Double
并尝试publishProgress((double)(downloadedSize/totalSize))