java.lang.Error

[dsdebastiani]

My app is reporting this error.

I have a lot of values but only in this case the problem occur.

Could someone help me? Thsnks.

java.lang.Error: 
  at com.marcinmoskala.kotlinpreferences.PreferenceHolder$Companion.getPreferencesOrThrowError$preferenceholder_release (PreferenceHolder.kt:86)
  at com.marcinmoskala.kotlinpreferences.bindings.PreferenceFieldBinder.readValue (PreferenceFieldBinder.kt:39)
  at com.marcinmoskala.kotlinpreferences.bindings.PreferenceFieldBinder.getValue (PreferenceFieldBinder.kt:22)
  at com.marcinmoskala.kotlinpreferences.bindings.PreferenceFieldBinder.getValue (PreferenceFieldBinder.kt:12)
  at app.package.utils.helpers.ApplicationPreference.getHomeGridElements (PreferencesHelper.kt)
  at app.package.modules.home.HomeFragment.onCreate (HomeFragment.kt:62)
  at android.support.v4.app.Fragment.performCreate (Fragment.java:2328)
  at android.support.v4.app.FragmentManagerImpl.moveToState (FragmentManager.java:1379)
  at android.support.v4.app.FragmentTransition.addToFirstInLastOut (FragmentTransition.java:1188)
  at android.support.v4.app.FragmentTransition.calculateFragments (FragmentTransition.java:1071)
  at android.support.v4.app.FragmentTransition.startTransitions (FragmentTransition.java:115)
  at android.support.v4.app.FragmentManagerImpl.executeOpsTogether (FragmentManager.java:2379)
  at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute (FragmentManager.java:2337)
  at android.support.v4.app.FragmentManagerImpl.execPendingActions (FragmentManager.java:2244)
  at android.support.v4.app.FragmentManagerImpl.dispatchStateChange (FragmentManager.java:3255)
  at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated (FragmentManager.java:3205)
  at android.support.v4.app.FragmentController.dispatchActivityCreated (FragmentController.java:195)
  at android.support.v4.app.FragmentActivity.onStart (FragmentActivity.java:597)
  at android.support.v7.app.AppCompatActivity.onStart (AppCompatActivity.java:177)
  at app.package.modules.base.BaseActivity.onStart (BaseActivity.kt:25)
  at android.app.Instrumentation.callActivityOnStart (Instrumentation.java:1270)
  at android.app.Activity.performStart (Activity.java:6689)
  at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2622)
  at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2724)
  at android.app.ActivityThread.-wrap12 (ActivityThread.java)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1473)
  at android.os.Handler.dispatchMessage (Handler.java:102)
  at android.os.Looper.loop (Looper.java:154)
  at android.app.ActivityThread.main (ActivityThread.java:6123)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:867)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:757)

PreferenceHelper.kt:

object ApplicationPreference : PreferenceHolder() {
    var homeGridElements: Int by bindToPreferenceField(2)
}

HomeFragment.kt

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
       ...
        gridItemDecoration = GridSpacingItemDecoration(ApplicationPreference.homeGridElements, getActivityContext()?.resources?.getDimensionPixelSize(R.dimen.dm_grid_margin) ?: 0, false)
    }

[MarcinMoskala]

Are you sure that you've set context before this usage? Like this:

PreferenceHolder.setContext(applicationContext)

A good place is on Application onCreate. Because this error looks like lack of preferences set (although it is wired that message that explains that is not displayed)

[dsdebastiani]

Yes, I'm sure.
My Application class starts others libs like Realm and Fabric the same way.

I've been running the app in production by more than 30 days. The error was reported by Playstore 5k times in this period and 99,6% of them occour with Android 7.0, others 0,4% with 7.1 an 8.0. There't reports for Android version below 7.0.

I think that issue has some rlation with the signature mode used to build the APK in the fist versions. I was building with Android Stuidio -> Build Signed APK assistant and using only V1 Signature version.

In my last build I changed the compilation mode to use the new APK Signature Scheme v2 - https://developer.android.com/about/versions/nougat/android-7.0.html#apk_signature_v2 - This build have been running in production by 5 days and the error did not occour anymore.

[MarcinMoskala]

That's strange. This subject needs to be investigated.