BlackBerry Forums Support Community               

Closed Thread
 
LinkBack Thread Tools
Old 08-07-2008, 02:48 AM   #1 (permalink)
Talking BlackBerry Encyclopedia
 
arunk's Avatar
 
Join Date: Mar 2008
Model: 8310
PIN: N/A
Carrier: Airtel
Posts: 229
Post Thanks: 0
Thanked 0 Times in 0 Posts
Question How to do call back?

Please Login to Remove!

I want to read the XML contents using http connection in a new thread and once the content has been read, I want the control to comeback to the main thread and execute the statement just after the one which invoked the thread.

something like return the value...

is it possible or any alternate method is there?
Offline  
Old 08-07-2008, 08:03 AM   #2 (permalink)
CrackBerry Addict
 
Join Date: Apr 2005
Location: hamburg, germany
Model: 8900
Carrier: o2
Posts: 838
Post Thanks: 0
Thanked 0 Times in 0 Posts
Default

i'll try to explain it a bit more simple.

you have your application A.
create an interface I. Add a method hurraTheDataAreThere(byte[] data).
Let A implement I.
Alter your connection thread to take an I as a parameter.
The interface there is to limit the access to only this one method.

In code this would look something like
Code:
//in your app
I callback = this;
new ConnectionThread(callback).start();

//in the connectionthread after the data are there
callback.hurraTheDataAreThere(data);

//in the application:
public void hurraTheDataAreThere(byte[] data){
System.out.println("hurra, the data are there! And they are "+data.length+" long");
}
in general you could also just pass the application object to your connection thread. but better to start with best practices instead of learning them later.
__________________
java developer, Devinto, hamburg/germany
Offline  
Closed Thread


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

MSA Altair 0-100 PPM LCD Hydrogen Sulfide H2S Single-gas Detector 10092521
$24.95
MSA Altair  0-100 PPM LCD Hydrogen Sulfide H2S Single-gas Detector 10092521 pictureALTAIR 4 – FOUR GAS MULTIGAS DETECTOR – MSA
$355.0
ALTAIR 4 – FOUR GAS MULTIGAS DETECTOR – MSA pictureMsa Altair Pro H2s
$20.0
Msa Altair Pro H2s  pictureMSA Power Supply Charger Altair 4x and 5x Multi Gas Instruments Detectors
$28.6
MSA Power Supply Charger  Altair 4x and 5x Multi Gas Instruments Detectors pictureAltair H2S
$15.0
Altair H2S picture






Copyright 2004-2016 BlackBerryForums.com.
The names RIM and BlackBerry are registered Trademarks of BlackBerry Inc.