Is it possible to register multiple registerForActivityResult callbacks in a fragment? or is it poss...

# android

[André Thiele]

Is it possible to register multiple registerForActivityResult callbacks in a fragment? or is it possible to distinguish between multiple requested permissions?

[Brian Dupuis]

If you use the RequestMultiplePermissions contract you’ll get a Map<String,Boolean> rather than a Boolean in the result that you can then check all of the permissions to see which were granted and which were not.

[Ian Lake]

And yes, you can call registerForActivityResult() multiple times with different callback logic for each

[Brian Dupuis]

That too.

[Ian Lake]

That is quite handy with the registerForActivityResult() Kotlin extension that lets you define the input at register time (so you tie the input with the callback together): https://developer.android.com/reference/kotlin/androidx/activity/result/package-summary?hl=en#registerforactivityresult_1

[Ian Lake]

which let's you write code like:

val requestCameraPermissionLauncher = registerForActivityResult(
  RequestPermission(),
  Manifest.permission.CAMERA
) { isGranted: Boolean ->
}

// now you can just requestCameraPermissionLauncher.launch()
// without any permission here

[Brian Dupuis]

Now if we could get the versions with the activity result in androidx.appcompat out of alpha.

[Ian Lake]

The Activity Result APIs themselves are in RC and that's what AppCompat 1.3.0-beta01 uses. Nothing should be alpha anymore at any level

[Ian Lake]

(and you can use AppCompat 1.2.0 with Fragment 1.3.0-rc02+Activity 1.2.0-rc01)

[Brian Dupuis]

Well, that’s excellent news.

[André Thiele]

Ok thanks @Ian Lake @Brian Dupuis! Registering multiple callbacks was what i tried first but i couldn’t get the second one working, will try again today maybe some other problem