In this code i need to write `return true` My func...

# android

[morozov]

In this code i need to write return true
My function:

override fun onBackPressed(): Boolean {
        if (amountCalculator?.visible ?: false)
            amountCalculator?.let { it.toggle(presenter.goal.amount) }
        else if (initialBalanceCalculator?.visible ?: false)
            initialBalanceCalculator?.let { it.toggle(presenter.goal.initialBalance) }
        else return false
        return true
    }

[scott]

morozov: why all the nullable types? are those views? they can be lateinit var, or delegate lazy bind references

[morozov]

@scott https://android.jlelse.eu/dont-put-view-null-checks-in-your-presenters-4b6026c67423

[scott]

right. so is that a presenter class? if so you shouldn't be referencing the views directly, but calling through an interface for normal MVP.

[morozov]

nope this method i used in my fragment.

[scott]

so if you are handling back in your fragment, that's cool. but then why are the views nullable?

[scott]

why not use lateinit var or a delegate

[scott]

even !! null assertion is better if you are positive that when back button is clicked those views exist.

[scott]

although it's probobly best to use a val someView by bindViewDelegate(R.id.someview)

[scott]

or lateinit