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Questions - android-handler

How to define a task, run it in the future, and cancel it using Kotlin coroutines

I'm new to kotlin Coroutines. I define a Runnable and call it asynchronously in a function using Handler with a delay. The important thing is that the previous task must be canceled before each call s...
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Hussein Yaqoobi

android

multithreading

kotlin

kotlin-coroutines

android-handler

Votes: 0

Answers: 1

Latest Answer

You can define a Job and cancel it: private var job: Job? = null private fun myFunction() { job?.cancel() job = scope.launch(ioDispatcher) { delay(3000) ... } }
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Hussein Yaqoobi

UI changes in a thread in android

I'm writing an android application that require me to hold the foreground of an Image Button for a second before changing it again. so I have written the code below (it worked on changing the colors o...
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moustafa

java

android

android-studio

android-handler

android-handlerthread

Votes: 0

Answers: 1

Latest Answer

You can use View's postDelayed method: Runnable runnable = () -> { imageButton1.setForeground(AppCompatResources.getDrawable(this, R.color.teal_200)); imageButton2.setForeground(App...
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Sergio

I can not stop a Runnable using Handler in JAVA

I am trying to build a stopwatch and i have a button named start which starts the counting, after it starts the name of the button changes to stop and when i press stop i want to pause the counting, b...
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Mihai Cozma

java

android

callback

android-handler

Votes: 0

Answers: 2

Latest Answer

Please remove all conditions blocks where you are checking start_button.isPressed(), it doesn't work. You can use additional flag isRunning to indicate whether the clock is running or not: private boo...
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Sergio

Does handler belong to thread in which it was created?

I'm relatively new to the "Looper-Handler" term. I'm pretty clear with the way they work but still confused with their architecture. I've also gone through couple of SO questions, but still ...
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stardep

android

android-handler

looper

android-looper

android-thread

Votes: 0

Answers: 1

Latest Answer

Right, if you use default constructor val h = Handler(). Default constructor associates this handler with the Looper for the current thread. If this thread does not have a looper, this handler won't ...
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Sergio

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