LocalDate.format causes OutofBount Exception in Observer - kotlin

Question

I'm making an app in android using Kotlin, Material Design Components and the new architecture components.
I have an activity that starts a DialogFragment onCreate
The fragment has 6 Views that, via an observer, observe a different LiveDate for each and every one.
While checking all the this setup work I noticed that after 7 view switching I get
2020-05-12 20:43:19.346 4778-4778/package E/InputEventReceiver: Exception dispatching input event.
2020-05-12 20:43:19.346 4778-4778/package E/MessageQueue-JNI: Exception in MessageQueue callback: handleReceiveCallback
2020-05-12 20:43:19.357 4778-4778/package E/MessageQueue-JNI:
java.lang.ArrayIndexOutOfBoundsException: length=9; index=9
at android.text.Layout$HorizontalMeasurementProvider.get(Layout.java:1589)
...
I cheked the following things:
did all the setup on only one view -> still crashes
did all the setup on only one view but without using the "createDateFieldObserver" method -> still carshes
not calling the observer -> no crash
calling the observer but without the LocalDate.format -> no crash
I concluded the probleme is in the format function but I do not understand why.
The error is not pointing in that direction.
Any ideas?
Activity code
class UITestingActivity: FragmentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_greenhouse)
val dialog = LabTimesDialogFragment()
dialog.show(supportFragmentManager, "LabTimes")
}
}
Fragment Code
class TimesDialogFragment : DialogFragment() {
companion object Companion {
private val TAG: String = "TimesDialog"
}
private val datesViewModel: TimesViewModel by activityViewModels()
private lateinit var datesViews: Map<LiveData<LocalDate>, TextInputEditText>
override fun onCreateDialog(savedInstanceState: Bundle?) : Dialog {
val viewsArray: Array<TextInputEditText>
return activity?.let {
val builder = AlertDialog.Builder(it)
val inflater = requireActivity().layoutInflater
val rootView: View = inflater.inflate(R.layout.dialog_filter_times, null)
builder.setView(rootView)
.setPositiveButton(R.string.feed) { dialog, id -> closeDialog() }
.setNegativeButton(R.string.cancel) { dialog, id -> getDialog()?.cancel() }
val dialog: AlertDialog = builder.create()
val fromSampling: TextInputEditText = rootView.findViewById(R.id.from_sampling) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
val toSampling: TextInputEditText = rootView.findViewById(R.id.to_sampling) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
val fromSending: TextInputEditText = rootView.findViewById(R.id.from_sending) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
val toSending: TextInputEditText = rootView.findViewById(R.id.to_sending) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
val fromReceiving: TextInputEditText = rootView.findViewById(R.id.from_receiving) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
val toReceiving: TextInputEditText = rootView.findViewById(R.id.to_receiving) ?: throw IllegalStateException("Missing date view in LabTimesFilterDialog")
datesViews = mapOf(datesViewModel.fromSampling to fromSampling,
datesViewModel.toSampling to toSampling,
datesViewModel.fromSending to fromSending,
datesViewModel.toSending to toSending,
datesViewModel.fromReceiving to fromReceiving,
datesViewModel.toReceiving to toReceiving
)
for ((liveData, textView) in datesViews) {
liveData.observe(this, createDateFieldObserver(textView))
textView.setOnClickListener { v ->
Log.d(TAG, "hello"+v.id)
}
}
return dialog
} ?: throw IllegalStateException("Activity cannot be null")
}
private fun closeDialog() {
// save dates to ViewModel
// closeDialog
TODO()
}
private fun createDateFieldObserver(tw: TextInputEditText): Observer<LocalDate> {
return Observer { date ->
Log.d(TAG, "obs"+tw.id)
tw.setText(date.format(DateTimeFormatter.ISO_DATE))
//tw.setText("hello")
}
}
}
ViewModel
class TimesViewModel : ViewModel() {
val fromSampling: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
val toSampling: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
val fromSending: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
val toSending: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
val fromReceiving: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
val toReceiving: MutableLiveData<LocalDate> = MutableLiveData(LocalDate.now())
}
it has been a while since I programmed for android. Everything I'm using here is new to me so if you spot an anti-pattern in this little code I would be glad to know.
Tnx

Answer 1

Turns out it was because of the layout.
There was no enough room in the view to display the whole date.
I don't understand why it causes indexoutofbound but the solution is to simply make the view "wrap_content" or bigger