one simple question:
is it possible to return a variable in Async task?
//my async task is in outer class
private class myTask extends AsyncTask<Void,Void,Void>{
//initiate vars
public myTask() {
super();
//my params here
}
protected Void doInBackground(Void... params) {
//do stuff
return null;
}
@Override
protected void onPostExecute(Void result) {
//do stuff
//here! how to return a value???
}
}
// i execute it from my activity
// codes below are from different class than the async task
myTask.execute()
myvalue = myTask.getvalue() //something like this????
Why not call a method that handles the value?
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private class myTask extends AsyncTask<Void,Void,Void>{
//initiate vars
public myTask() {
super();
//my params here
}
protected Void doInBackground(Void... params) {
//do stuff
return null;
}
@Override
protected void onPostExecute(Void result) {
//do stuff
myMethod(myValue);
}
}
private myHandledValueType myMethod(Value myValue){
//handle value
return myHandledValueType;
}
}
That's what onPostExecute() is for. It runs on the UI thread and you can deliver your result from there to the screen (or anywhere else you need). It won't be called until the final result is available. If you want to deliver intermediate results, take a look at onProgressUpdate()
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