NativeScript / NativeScript/plugins
[@nativescript/google-maps] Break app when you have a map inside a ScrollView
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- TypeScript
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Description
When you have a map inside a scrollView, if you navigate to another page, exit the app and re-enter, when you return to the back page with the map the app breaks. Error:
System.err: An uncaught Exception occurred on "main" thread.
System.err: Calling js method onCreateView failed
System.err: Error: java.lang.ClassCastException: android.view.AbsSavedState$1 cannot be cast to org.nativescript.widgets.HorizontalScrollView$SavedState
System.err:
System.err: StackTrace:
System.err: onCreateView(file: src\webpack:\abll-app-next\node_modules\@nativescript\core\ui\frame\index.android.js:768:0)
System.err: at onCreateView(file: src\webpack:\abll-app-next\node_modules\@nativescript\core\ui\frame\fragment.android.js:28:0)
System.err: at com.tns.Runtime.callJSMethodNative(Native Method)
System.err: at com.tns.Runtime.dispatchCallJSMethodNative(Runtime.java:1302)
System.err: at com.tns.Runtime.callJSMethodImpl(Runtime.java:1188)
System.err: at com.tns.Runtime.callJSMethod(Runtime.java:1175)
System.err: at com.tns.Runtime.callJSMethod(Runtime.java:1153)
System.err: at com.tns.Runtime.callJSMethod(Runtime.java:1149)
System.err: at com.tns.FragmentClass.onCreateView(FragmentClass.java:55)
System.err: at androidx.fragment.app.Fragment.performCreateView(Fragment.java:3104)
System.err: at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:524)
System.err: at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
System.err: at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1899)
System.err: at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1817)
System.err: at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1760)
System.err: at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:547)
System.err: at android.os.Handler.handleCallback(Handler.java:942)
System.err: at android.os.Handler.dispatchMessage(Handler.java:99)
System.err: at android.os.Looper.loopOnce(Looper.java:210)
System.err: at android.app.ActivityThread.main(ActivityThread.java:8109)
System.err: at java.lang.reflect.Method.invoke(Native Method)
System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:559)
System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
System.err: Caused by: java.lang.ClassCastException: android.view.AbsSavedState$1 cannot be cast to org.nativescript.widgets.HorizontalScrollView$SavedState
System.err: at org.nativescript.widgets.VerticalScrollView.onRestoreInstanceState(VerticalScrollView.java:235)
System.err: at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:4012)
System.err: at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:4018)
System.err: at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:4018)
System.err: at android.view.View.restoreHierarchyState(View.java:21650)
Playback repository: https://github.com/vallemar/error-google-maps-on-ScrollView
Video:
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the crash with the linked playback repository and inspect the Android restoration path shown in the stack trace, including frame/index.android.js, fragment.android.js, and VerticalScrollView.onRestoreInstanceState. Compare the map-in-ScrollView navigation and app-reentry flow with the reported ClassCastException. Done means returning to the page no longer breaks the app during view-state restoration.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, typescript
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100