No ticking after resuming from non-FlutterActivity

[chsigg]

Steps to Reproduce

When passing a result from Android back to Flutter through MethodChannel.Result directly from a FlutterActivity::onActivityResult without waiting for the call to FlutterActivity::onResume(), some things go wrong. For example, showing a snack bar or starting an animation doesn't work.

I've attached a repro. The app is supposed to increment both counters at the same rate, but the second one only increments at half the rate.

Logs

flutter run output:
Launching lib\main.dart on Pixel 2 XL in debug mode...
Initializing gradle...
Resolving dependencies...
Running 'gradlew assembleDebug'...
Built build\app\outputs\apk\debug\app-debug.apk (25.4MB).
Installing build\app\outputs\apk\app.apk...
I/FlutterActivityDelegate( 8137): onResume setting current activity to this
Syncing files to device Pixel 2 XL...
D/AppActivity( 8137): onCreate()
D/MainActivity( 8137): onActivityResult()
I/FlutterActivityDelegate( 8137): onResume setting current activity to this
I/flutter ( 8137): Started animation after 'startActivity'
I/flutter ( 8137): Started animation after 'none'

I tapped the FAB twice and the screen now says (2 forward / 1 completed).

flutter analyze output:
No issues found!
Ran in 7.0s

Flutter Doctor

flutter doctor -v:
[√] Flutter (Channel beta, v0.1.5, on Microsoft Windows [Version 10.0.16299.309], locale en-US)
• Flutter version 0.1.5 at C:\Users\Christian\Documents\Visual Studio 2017\ThirdParty\flutter
• Framework revision 3ea4d06 (4 weeks ago), 2018-02-22 11:12:39 -0800
• Engine revision ead227f
• Dart version 2.0.0-dev.28.0.flutter-0b4f01f759

[√] Android toolchain - develop for Android devices (Android SDK 27.0.3)
• Android SDK at C:\Users\Christian\AppData\Local\Android\sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-27, build-tools 27.0.3
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b01)

[√] Android Studio (version 3.0)
• Android Studio at C:\Program Files\Android\Android Studio
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b01)

[√] Connected devices (1 available)
• Pixel 2 XL • 710KPYR0349426 • android-arm64 • Android 8.1.0 (API 27)

• No issues found!

animation.zip

[chsigg]

The attached activity waits for onPostResume() to return the result, which makes the counters increment synchronously.
MainActivity.java.txt

[jonahwilliams]

This is possibly related to #11906

[najeira]

similar: #13818 #14619 #14665

[jonahwilliams]

This should also be fixed by a combination of flutter/engine#4848 and #16261

[MaikuB]

@jonahwilliams @najeira I'm guessing the issue I've raised #16636 is a dupe of this?

[jonahwilliams]

@MaikuB that does sound similar to the issue that I fixed - the changes have been rolled into master so you should be able to confirm. Otherwise I can look at your issue as a follow up.

[MaikuB]

@jonahwilliams brilliant, confirmed it's fixed on master so i'll close the issue i've raised. thanks

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.