CATASTROPHIC ERROR: MvvmFragment -- When Observing with Moko LiveData and using Android Binding Framework
TheArchitect123 opened this issue · comments
I have a MvvmFragment that is subscribing to changes on a MutableLiveData object inside its view model.
There is a Lifecycle observable that is being run after the view is inflated into memory in onViewCreated.
The exception occurs when I try to access the binding object and allocate the value from the view model's live data into the binding view.
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
viewModel.progressReward.addObserver {
binding.progressBar.progress = it /// EXCEPTION OCCURS HERE
}
}
FATAL EXCEPTION: main
Process: air.au.com.ontherun, PID: 14250
java.lang.IllegalArgumentException: can't read binding when view not created
at dev.icerock.moko.mvvm.MvvmFragment.getBinding(MvvmFragment.kt:21)
at dev.icerock.moko.mvvm.livedata.LiveData.addObserver$lambda$0(LiveData.kt:25)
at dev.icerock.moko.mvvm.livedata.LiveData.$r8$lambda$ga3cqZuDL7Dlir_4fzsBiyrVfwM(Unknown Source:0)
at dev.icerock.moko.mvvm.livedata.LiveData$$ExternalSyntheticLambda0.onChanged(Unknown Source:2)
at androidx.lifecycle.LiveData.considerNotify(LiveData.java:133)
at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:151)
at androidx.lifecycle.LiveData.setValue(LiveData.java:309)
at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:50)
at androidx.lifecycle.LiveData$1.run(LiveData.java:93)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7918)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
@Alex009 @YokiToki @darronschall
If anyone can take a look at this ASAP, I'd appreciate it.
This is a pretty serious issue.
I found a temporary workaround for now by wrapping the binding object with a try catch. Then the next time data comes through it's broadcasted again.
viewModel.progressReward.addObserver {
try {
binding.progressBar.progress = it
}
catch (ex: Exception) {}
}
Call ld() to get andru livedata and use observe with lifecycle
It works!! Thanks :)