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androidkotlincoroutine

different about onAwait And await() in kotlin coroutine

Whats is different about onAwait And await() in kotlin coroutine, how to implement dan function in android? i have code like this

var value = ""
val resultEmail = async {
   viewModel.email.collect { email ->
       //get email here
       value = email
   }
}
// whats different on this method on below
resultEmail.onAwait 
resultEmail.await()

please help me how to using that function, thankyou

Solution

  • Both onAwait and await() are two ways to handle the result of an asynchronous operation, but:

    onAwait: This is used to specify a callback that will be invoked when the result of the asynchronous operation is available. It allows you to perform some action or logic with the result without blocking the current thread.
    (In your codes, resultEmail.onAwait is used to register a callback that will be called when the result of the resultEmail asynchronous operation is available.)

    await(): This is used to suspend the current coroutine until the result of the asynchronous operation is available. It returns the result of the operation once it is completed.
    (In your codes, resultEmail.await() is used to suspend the coroutine until the result of the resultEmail asynchronous operation is available and then retrieve the result.)