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我正在使用異步任務上傳視頻文件。爲了跟蹤進度，我在狀態欄中運行了一個通知。通知正常工作和更新，但會導致嚴重的性能問題，導致狀態欄崩潰並需要重新啓動手機。我的代碼如下：從AsynTask更新通知欄會導致通知欄崩潰
private class UploadMedia extends AsyncTask<Void, Integer, String> {
private int NOTIFICATION_ID = 1;
private CharSequence _contentTitle;
private final NotificationManager _notificationManager = (NotificationManager) getActivity()
.getApplicationContext()
.getSystemService(
getActivity().getApplicationContext().NOTIFICATION_SERVICE);
Notification _notification;
PendingIntent _pendingIntent;
private long totalSize;
private int _progress = 0;
private InputStreamBody isb;
private File uploadFile;
protected void onPreExecute() {
Intent intent = new Intent();
_pendingIntent = PendingIntent.getActivity(getActivity(), 0,
intent, 0);
_contentTitle = "Uploader " + mediaTitle + " til Skoletube";
CharSequence contentText = _progress + "% complete";
_notification = new Notification(R.drawable.icon, _contentTitle,
System.currentTimeMillis());
_notification.flags = _notification.flags
| Notification.FLAG_ONGOING_EVENT;
_notification.contentIntent = _pendingIntent;
_notification.setLatestEventInfo(getActivity(), _contentTitle,
contentText, _pendingIntent);
_notificationManager.notify(NOTIFICATION_ID, _notification);
Toast.makeText(getActivity(), "Starter upload", Toast.LENGTH_SHORT)
.show();
try {
uploadFile = new File(_mediaFile.getPath());
// FileInputStream is = new FileInputStream(uploadFile);
//
// ByteArrayOutputStream bos = new ByteArrayOutputStream();
// byte[] b = new byte[1024];
// int bytesRead;
// while ((bytesRead = is.read(b)) != -1) {
// bos.write(b, 0, bytesRead);
// }
// byte[] data = bos.toByteArray();
//
// isb = new InputStreamBody(new ByteArrayInputStream(data),
// uploadFile.getName());
} catch (Exception ex) {
Log.i(TAG,
"Pre execute - oh noes... D: "
+ ex.getLocalizedMessage());
}
}
@Override
protected String doInBackground(Void... params) {
String result = "";
try {
// Inititate connectionparts
HttpClient client = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(
"http://www.skoletube.dk/beta/api_userupload.php");
CustomMultipartEntity multipartE = new CustomMultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE,
new ProgressListener() {
@Override
public void transferred(long num) {
publishProgress((int) ((num/(float) totalSize) * 100));
}
});
// Add the post elements
String timestamp = String
.valueOf(System.currentTimeMillis()/1000);
String mode = "xml";
String hashSum = Utils.md5(ActiveUser.getPartner() + timestamp
+ ActiveUser.getInstance().getToken()
+ ActiveUser.getInstance().getSecret()
+ ActiveUser.getInstance().getUserID()
+ spnChannel.getSelectedItem().toString()
+ mediaDescribtion + "KEYWORDLOL"
+ spnPublic.getSelectedItem().toString() + mediaTitle
+ ActiveUser.getSharedkey());
multipartE.addPart("uid", new StringBody(ActiveUser
.getInstance().getUserID()));
multipartE.addPart("token", new StringBody(ActiveUser
.getInstance().getToken()));
multipartE.addPart("token_secret", new StringBody(ActiveUser
.getInstance().getSecret()));
multipartE.addPart("partner",
new StringBody(ActiveUser.getPartner()));
multipartE.addPart("timestamp",
new StringBody(timestamp.toString()));
multipartE.addPart("key", new StringBody(hashSum));
multipartE.addPart("video_title", new StringBody(mediaTitle));
multipartE.addPart("video_desc", new StringBody(
mediaDescribtion));
multipartE.addPart("video_keyword",
new StringBody("KEYWORDLOL"));
multipartE.addPart("video_privacy", new StringBody(spnPublic
.getSelectedItem().toString()));
multipartE.addPart("video_channel", new StringBody(spnChannel
.getSelectedItem().toString()));
multipartE.addPart("videoupload", new FileBody(uploadFile));
postRequest.setEntity(multipartE);
totalSize = multipartE.getContentLength();
HttpResponse loginResponse = client.execute(postRequest);
HttpEntity theEnt = loginResponse.getEntity();
result = EntityUtils.toString(theEnt);
Log.i(TAG, "Result: " + result);
} catch (Exception ex) {
Log.i(TAG,
"Do in background - oh noes... D: "
+ ex.getLocalizedMessage());
}
return result;
}
@Override
protected void onProgressUpdate(Integer... progress) {
if (_notification == null)
return;
_progress = progress[0];
_contentTitle = "Uploader " + mediaTitle + " til Skoletube";
CharSequence contentText = _progress + "% complete";
_notification.setLatestEventInfo(getActivity(), _contentTitle,
contentText, _pendingIntent);
_notificationManager.notify(NOTIFICATION_ID, _notification);
}
@Override
protected void onPostExecute(String result) {
_notificationManager.cancel(NOTIFICATION_ID);
}
}
我在HTC Sensation上測試這個。我按下通知欄時會出現問題，導致問題擴大。手機會凍結並觸摸，然後我是否會實際進入通知欄或通知欄會崩潰。如果我確實進入通知欄，性能問題仍然存在，再次關閉通知欄與打開通知欄一樣棘手。 我在想什麼可能是發送通知更新的絕對數量可能會導致問題，但我不知道。
欣賞任何想法和建議。