Several welcome activity launched when rotating

[FredJul]

When you rotate the screen during the welcome screens (i.e. before you press "Done") , you'll end up with several identical welcome activities started.

That basically means that when you finish the welcome steps, you'll see a new welcome guide until you remove all the stacked welcome activities.

[stephentuso]

This is what WelcomeHelper#onSaveInstanceState is for. See Show the welcome screen and make sure your code matches that.

[FredJul]

I forgot to mention that I actually did call WelcomeHelper#onSaveInstanceState

class EnterPinActivity : AppCompatActivity() {

    private val welcomeScreen by lazy { WelcomeHelper(this, TutorialActivity::class.java) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // savedInstanceState is non-null when there is fragment state
        // saved from previous configurations of this activity
        // (e.g. when rotating the screen from portrait to landscape).
        // In this case, the fragment will automatically be re-added
        // to its container so we don't need to manually add it.
        // For more information, see the Fragments API guide at:
        //
        // http://developer.android.com/guide/components/fragments.html
        //
        if (savedInstanceState == null) {
            // Create the detail fragment and add it to the activity using a fragment transaction.
            supportFragmentManager.beginTransaction()
                    .replace(android.R.id.content, EnterPinFragment())
                    .commit()
        }

        welcomeScreen.show(savedInstanceState)
    }

    override fun onSaveInstanceState(outState: Bundle?, outPersistentState: PersistableBundle?) {
        super.onSaveInstanceState(outState, outPersistentState)
        welcomeScreen.onSaveInstanceState(outState)
    }
}

Maybe it's due to the use of Kotlin/lazy variable but I honestly don't see why it would cause any issue