android - Check if asynctask with Progress Dialog is finished in non activity class -

-

i have created non activity java class doing same calculation different activities. class has asynctask progress dialog in it. in cases calculation not last operation of activity , goes fine, when progress dialog goes lost.

example:

myjavaclass docalculations= new myjavaclass (someactivity.this);  docalculations.do(); //<------ method has asysctask progress dialog  finish();

result:

java.lang.illegalargumentexception: view=com.android.internal.policy.impl.phonewindow$decorview{2bbf820e v.e..... r......d 0,0-1026,483} not attached window manager

how can wait asynctask finish , finish activity?

additional question: using asynctask in non activity class bad practice ?

if want keep activity active until asynctask has finished job, can define callback method in activity gets called when task has finished , can react appropriately:

in activity:

private boolean finishaftercurrenttask = false;  public void ontaskfinished() {     if (finishaftercurrenttask) { // set true when running last task         finish();     } }

in asynctask:

protected void onpostexecute(object result) {     progressdialog.dismiss();     activity.ontaskfinished(); }

i'm assuming you're keeping reference activity in myjavaclass. in case you're calling asynctask non-ui thread, should run callback (and methods involving dialog) via activity.runonuithread().

as second question - if use asynctask in class methods can called thread other ui thread, it's necessary use runonuithread() perform operations on ui, such changing contents of view or showing/hiding dialog, beause onpreexecute() , onpostexecute() called same thread execute().

on other hand, if start task inside 1 of ui callbacks, guaranteed run on ui thread, don't need worry that.


Comments

Post a Comment

Popular posts from this blog

qt - Using float or double for own QML classes -

-
i've created components , helper methods using c++ , qt used in qml gui. of methods calculate gui elements (size, transformations, scene graph items creation). target arm 32 bit using opengl / eglfs render output. opengl using float , qml using real (defined double ). what should use in c++ do not lose precision? if use qreal ( double ) shouldn't lose precision. if git grep float in qtbase.git , can find out bit more: dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0-* important behavior changes * dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0- dist/changes-5.2.0- - qt compiled qreal typedef'ed double on dist/changes-5.2.0: platforms. qreal float on arm chipsets before. guarantees more dist/changes-5.2.0- consistent behavior between platforms qt supports, binary dist/chan...
Read more

Create Outlook appointment via C# .Net -

-
i need create outlook appointment using microsoft.office.interop.outlook , while can work locally on own workstation , works if run web application via server's browser, not work when connect server externally. hence, think might permission issue. i changed application pool identity " localsystem " don't access denied error. unfortunately, doesn't work. the app behaves if appointment created, appointment doesn't appear in outlook. here include file on top of aspx.cs page using outlook = microsoft.office.interop.outlook; here code using pop appointment. outlook.application apptapp = new outlook.application(); outlook.appointmentitem appt = apptapp.createitem(outlook.olitemtype.olappointmentitem) outlook.appointmentitem; appt.subject = txtfirstname.text + " " + txtlastname.text; appt.body = txtcomment.text; appt.alldayevent = false; appt.start = datetime.parse(txtreminderdate.text + " 8:00 am"); appt.end = datetime.p...
Read more

ios - Swift Array Resetting Itself -

-
i have 2 arrays: pointhistory , datehistory . have nstimer , , when timer runs out, action called. in action appending int pointhistory , , current date string datehistory . here timer action: func timeraction() { let steppervalue = int(stepper.value) employee.numberofpoints = steppervalue networking.saveemployee(employee, completion: { (error) -> void in if error != nil { let alert = uialertcontroller(title: "error", message: "there error updating \(self.employee.name)'s points", preferredstyle: .alert) let alertaction = uialertaction(title: "ok", style: .cancel, handler: nil) alert.addaction(alertaction) self.presentviewcontroller(alert, animated: true, completion: nil) } }) var dateformatter = nsdateformatter() dateformatter.dateformat = "mm-dd-yyyy" dateformatter.timezone = nstimezone.localtimezone() var date = nsdate() var ...
Read more