Computer scienceMobileAndroidUser InterfaceUI components

Event listeners

Theory

onKeyListener

Report a typo

Select the blocks of code that will compile successfully.

a)

val button: Button = findViewById(R.id.button)
button.setOnKeyListener { v, keyCode, event ->
    // TODO 
    false
}

b) 

val button: Button = findViewById(R.id.button)
button.setOnKeyListener { v, event ->
    // TODO
    true
}

c)

val button: Button = findViewById(R.id.button)
button.setOnKeyListener { v, keyCode, event ->
    // TODO
    true
}

d)

val button: Button = findViewById(R.id.button)
button.setOnListener { v, keyCode, event ->
    // TODO
    true
}

e) 

val button: Button = findViewById(R.id.button)
button.setOnListener { v, keyCode ->
    // TODO
    true
}
Select one or more options from the list
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