IssueTracker

Component used: LifecycleRegistry
Version used: 1.0.0-alpha9
Devices/Android versions reproduced on: Android 5 (it works on Android 8)

I have a strange problem connected to a MutableLiveData that doesn't trigger the observer when updated in onActivityResult. The cause seems to be a wrong state in LifecycleRegistry, in the following example the println in onResume prints "resume CREATED". Between startActivityForResult and onResume the state is set to CREATED even if the Activity remains always started (because the other activity is not full screen).

You can reproduce this issue using this Activity:

class LiveDataTestActivity : AppCompatActivity(), LifecycleRegistryOwner {

    private val lifecycle = LifecycleRegistry(this)

    override fun getLifecycle() = lifecycle

    private val myLiveData = MutableLiveData<Int>().apply { value = 0 }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val textView = TextView(this).apply {
            text = "AAAA"
            setOnClickListener {
                val sendIntent = Intent().apply {
                    action = Intent.ACTION_SEND
                    putExtra(Intent.EXTRA_TEXT, "This is my text to send.")
                    type = "text/plain"
                }
                startActivityForResult(sendIntent, 123)
            }
        }
        setContentView(textView)

        myLiveData.observe(this, Observer<Int> {
            textView.text = it.toString()
        })
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        myLiveData.value = (myLiveData.value ?: 0) + 1
        println("Value ${myLiveData.value}")
    }

    override fun onResume() {
        super.onResume()
        println("resume ${lifecycle.currentState}")
    }
}