Top "Handler" questions

In the Observer pattern, an event handler is the function or method called on an observer listening for an event dispatched by the subject.

Passing arguments to an event handler

In the below code, I am defining an event handler and would like to access the age and name variable …

c# events event-handling handler
What is a handler

Hi I am trying to learn some programing related terms, and I often comes over the word handler. Can anyone …

handler
PDF Handler : content-disposition filename

I am outputting a PDF file in a Web browser (IE8) HttpContext.Response.writefile(fileName) and it works great. When …

handler filenames ashx content-disposition save-as
CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch views

I have an issue with the following error in Android: CalledFromWrongThreadException;: Only the original thread that created a view hierarchy …

android handler android-asynctask
How to remove a runnable from a handler object added by postDelayed?

I have an "open" animation and am using Handler.postDelayed(Runnable, delay) to trigger a "close" animation after a short …

android handler runnable postdelayed
Completion handler for UINavigationController "pushViewController:animated"?

I'm about creating an app using a UINavigationController to present the next view controllers. With iOS5 there´s a new …

ios uinavigationcontroller handler pushviewcontroller
Can't create handler inside thread that has not called Looper.prepare()

I get this error "Can't create handler inside thread that has not called Looper.prepare()" Can you tell me how …

java android handler
What is the relationship between Looper, Handler and MessageQueue in Android?

I have checked the official Android documentation/guide for Looper, Handler and MessageQueue . But I couldn't get it. I am …

android handler message-queue looper
How to create a Looper thread, then send it a message immediately?

I have a worker thread that sits in the background, processing messages. Something like this: class Worker extends Thread { public …

android multithreading handler looper
Android: use handler post.delayed twice

I would like to know if it's possible to use handler().postdelayed twice? I mean, I want to create a …

android handler delay postdelayed