I publish file upload progress via NotificationManager, but while updating its progress UI freezes.
I use NotificationCompat.Builder, which cached in the class field. So progress publishing is a very simple:
manager.notify(id, uploader.
setProgress(MAX_PROGRESS, (int) (progress * 100), false).
build()
);
Update progress is guaranteed to execute from the main thread(wrapped in Handler decorator).
this.request.setCallback(new UploaderDecorator(this.request.getCallback()));
The very publication of progress is as follows:
long total = file.length();
long uploaded = 0;
int bytesRead = input.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
output.write(buffer, 0, bufferSize);
uploaded += bytesRead;
callback.onUploadProgress(activeFile, ((float) uploaded / total));
bytesRead = input.read(buffer, 0, bufferSize);
}
So why it's works so slow?
This is a common behavior. You shouldn't flood the NotificationManager with frequent updates. You should decide an interval to update, like twice every second.
For example,
long startTime;
long elapsedTime = 0L;
if (elapsedTime > 500) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
mBuilder.setProgress(100, (int) newValue, false);
mNotifyManager.notify(notificationID, mBuilder.build());
startTime = System.currentTimeMillis();
elapsedTime = 0;
}
});
Log.d("Andrognito", newValue + "Progress");
}
else
elapsedTime = new Date().getTime() - startTime;
This works perfectly for me and doesn't freeze the notifications too.
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