Kotlin wait for function to finish then complete code-CodePudding

In my code, I have 2 functions that update global variables. When I call them (On top of onCreate)

Like this:

override fun onCreate(savedInstanceState: Bundle?) {
    userManager = UserManager(this) 
        observeEmail()
        observePassword()

Code continues, I want to wait for these 2 functions to finish then to continue my code how can I do that?

As you can see first is printed message from onCreate, then from the function which is before print in onCreate

prints

code

CodePudding user response：

It looks to me like the second param in that observe() method is a callback.

My suggestion is this:

Way way up at the very top of the class, create a class-global variable called callBack like this:

callBack:(()->Unit)?=null

Then, inside of your onCreate() push everything that you want to happen after observeEmail into one massive routine and let callBack take the value of that routine. Like this:

callBack={doEverything()
doMore()
doOtherStuff()
}

Now go back inside that second param of .observe(), you know that place where you printed the email hint. And under that print line, add this:

callBack?.invoke()

Now everything will wait until observe() returns a result.