TLHC platform views on Android 14/15 stop updating on resume #146499

evil159 · 2024-04-09T11:06:19Z

Steps to reproduce

I've created a new project with flutter create and integrated a simple test view on Android side as per https://docs.flutter.dev/platform-integration/android/platform-views.
Set up FlutterEngine cache as per Step 3 of this guide https://docs.flutter.dev/add-to-app/android/add-flutter-screen#step-3-optional-use-a-cached-flutterengine.

Steps to reproduce

Launch the app
Switch to Home Screen
Open an app or two(camera, phone app etc.)
- This step can be skipped if Developer option > Don't keep activities is enabled
Go back to the sample app.

Environment

Pixel 8 running AP31.240223.016.A3(Android 15 Preview)

Sample project: platform_view_test 3.zip

Expected results

The platform view hosted by Flutter app is displayed and interactive.

Actual results

On Galaxy the platform view is not displayed, instead the place it used to occupy is rendered solid white.
On Pixel the platform view is displayed, but not interacting(doesn't respond to touch).

Code sample

Dart:

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
      final Map<String, dynamic> creationParams = <String, dynamic>{};

    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text("App"),
      ),
      body: AndroidView(
        viewType: "nativeView",
        layoutDirection: TextDirection.ltr,
        creationParams: creationParams,
        creationParamsCodec: const StandardMessageCodec(),
      ),
    );
  }
}

Platform side:

class MyApplication : Application() {
    private lateinit var flutterEngine : FlutterEngine

    override fun onCreate() {
        super.onCreate()

        // Instantiate a FlutterEngine.
        flutterEngine = FlutterEngine(this)

        // Start executing Dart code to pre-warm the FlutterEngine.
        flutterEngine.dartExecutor.executeDartEntrypoint(
            DartExecutor.DartEntrypoint.createDefault()
        )

        // Cache the FlutterEngine to be used by FlutterActivity.
        FlutterEngineCache
            .getInstance()
            .put("my_engine_id", flutterEngine)
    }
}

class RootActivity: Activity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        startActivity(
            FlutterActivity.CachedEngineIntentBuilder(MainActivity::class.java, "my_engine_id")
                .build(this)
        )
        finish()
    }
}

class MainActivity: FlutterActivity() {
    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        super.configureFlutterEngine(flutterEngine)
        flutterEngine
            .platformViewsController
            .registry
            .registerViewFactory("nativeView", NativeViewFactory())
    }
}

Screenshots or Video

Screenshots / Video demonstration

Screen_recording_20240409_135855.mp4

Logs

---------------------------- PROCESS STARTED (19824) for package com.example.platform_view_test ----------------------------
2024-04-09 14:01:09.947 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 171979766; UID 10274; state: ENABLED
2024-04-09 14:01:09.947 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 242716250; UID 10274; state: DISABLED
2024-04-09 14:01:09.959 19824-19824 ApplicationLoaders      com.example.platform_view_test       D  Returning zygote-cached class loader: /system_ext/framework/androidx.window.extensions.jar
2024-04-09 14:01:09.959 19824-19824 ApplicationLoaders      com.example.platform_view_test       D  Returning zygote-cached class loader: /system_ext/framework/androidx.window.sidecar.jar
2024-04-09 14:01:09.962 19824-19824 ziparchive              com.example.platform_view_test       W  Unable to open '/data/data/com.example.platform_view_test/code_cache/.overlay/base.apk/classes.dm': No such file or directory
2024-04-09 14:01:09.975 19824-19824 ziparchive              com.example.platform_view_test       W  Unable to open '/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/base.dm': No such file or directory
2024-04-09 14:01:09.975 19824-19824 ziparchive              com.example.platform_view_test       W  Unable to open '/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/base.dm': No such file or directory
2024-04-09 14:01:10.011 19824-19824 nativeloader            com.example.platform_view_test       D  Configuring clns-6 for other apk /data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/base.apk. target_sdk_version=33, uses_libraries=, library_path=/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/lib/arm64:/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/base.apk!/lib/arm64-v8a, permitted_path=/data:/mnt/expand:/data/user/0/com.example.platform_view_test
2024-04-09 14:01:10.024 19824-19824 GraphicsEnvironment     com.example.platform_view_test       V  Currently set values for:
2024-04-09 14:01:10.024 19824-19824 GraphicsEnvironment     com.example.platform_view_test       V    angle_gl_driver_selection_pkgs=[com.android.angle, com.linecorp.b612.android, com.campmobile.snow, com.google.android.apps.tachyon]
2024-04-09 14:01:10.024 19824-19824 GraphicsEnvironment     com.example.platform_view_test       V    angle_gl_driver_selection_values=[angle, native, native, native]
2024-04-09 14:01:10.024 19824-19824 GraphicsEnvironment     com.example.platform_view_test       V  com.example.platform_view_test is not listed in per-application setting
2024-04-09 14:01:10.025 19824-19824 GraphicsEnvironment     com.example.platform_view_test       V  Neither updatable production driver nor prerelease driver is supported.
2024-04-09 14:01:10.049 19824-19897 ResourceExtractor       com.example.platform_view_test       I  Found extracted resources res_timestamp-1-1712655907628
2024-04-09 14:01:10.052 19824-19896 nativeloader            com.example.platform_view_test       D  Load /data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/lib/arm64/libflutter.so using ns clns-6 from class loader (caller=<unknown>): ok
2024-04-09 14:01:10.059 19824-19824 tform_view_test         com.example.platform_view_test       W  type=1400 audit(0.0:18469): avc:  denied  { read } for  name="max_map_count" dev="proc" ino=6767069 scontext=u:r:untrusted_app_32:s0:c18,c257,c512,c768 tcontext=u:object_r:proc_max_map_count:s0 tclass=file permissive=0 app=com.example.platform_view_test
2024-04-09 14:01:10.133 19824-20001 vulkan                  com.example.platform_view_test       D  searching for layers in '/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/lib/arm64'
2024-04-09 14:01:10.142 19824-19941 flutter                 com.example.platform_view_test       I  The Dart VM service is listening on http://127.0.0.1:40127/VYwrTLx62Uk=/
2024-04-09 14:01:10.160 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 279646685; UID 10274; state: DISABLED
2024-04-09 14:01:10.191 19824-20001 vulkan                  com.example.platform_view_test       D  added global layer 'VK_LAYER_KHRONOS_validation' from library '/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/lib/arm64/libVkLayer_khronos_validation.so'
2024-04-09 14:01:10.216 19824-20001 vulkan                  com.example.platform_view_test       D  searching for layers in '/data/app/~~Jwigw4BUI7MoNTTzWd31uw==/com.example.platform_view_test-mcIrPFuHK3VSxqnVEsDqsg==/base.apk!/lib/arm64-v8a'
2024-04-09 14:01:10.228 19824-19824 tform_view_test         com.example.platform_view_test       W  Accessing hidden method Landroid/view/accessibility/AccessibilityNodeInfo;->getSourceNodeId()J (unsupported,test-api, reflection, allowed)
2024-04-09 14:01:10.228 19824-19824 tform_view_test         com.example.platform_view_test       W  Accessing hidden method Landroid/view/accessibility/AccessibilityRecord;->getSourceNodeId()J (unsupported, reflection, allowed)
2024-04-09 14:01:10.228 19824-19824 tform_view_test         com.example.platform_view_test       W  Accessing hidden field Landroid/view/accessibility/AccessibilityNodeInfo;->mChildNodeIds:Landroid/util/LongArray; (unsupported, reflection, allowed)
2024-04-09 14:01:10.228 19824-19824 tform_view_test         com.example.platform_view_test       W  Accessing hidden method Landroid/util/LongArray;->get(I)J (unsupported, reflection, allowed)
2024-04-09 14:01:10.247 19824-19824 ContentCaptureHelper    com.example.platform_view_test       I  Setting logging level to OFF
2024-04-09 14:01:10.254 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 237531167; UID 10274; state: DISABLED
2024-04-09 14:01:10.301 19824-19824 WindowExtensionsImpl    com.example.platform_view_test       I  Initializing Window Extensions.
2024-04-09 14:01:10.581 19824-19855 tform_view_test         com.example.platform_view_test       I  Compiler allocated 4683KB to compile void android.view.ViewRootImpl.performTraversals()
2024-04-09 14:01:10.664 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 171228096; UID 10274; state: ENABLED
2024-04-09 14:01:10.666 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 210923482; UID 10274; state: ENABLED
2024-04-09 14:01:10.666 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 63938206; UID 10274; state: DISABLED
2024-04-09 14:01:10.703 19824-19855 tform_view_test         com.example.platform_view_test       I  Compiler allocated 4213KB to compile void android.widget.TextView.<init>(android.content.Context, android.util.AttributeSet, int, int)
2024-04-09 14:01:10.705 19824-19824 PlatformViewsController com.example.platform_view_test       I  Hosting view in view hierarchy for platform view: 0
2024-04-09 14:01:10.706 19824-19824 PlatformViewsController com.example.platform_view_test       I  PlatformView is using ImageReader backend
2024-04-09 14:01:10.706 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 236825255; UID 10274; state: DISABLED
2024-04-09 14:01:10.770 19824-19824 ImageTextu...istryEntry com.example.platform_view_test       E  Dropping PlatformView Frame
2024-04-09 14:01:10.777 19824-19824 ContentCaptureHelper    com.example.platform_view_test       I  Setting logging level to OFF
2024-04-09 14:01:11.933 19824-19824 ImageTextu...istryEntry com.example.platform_view_test       E  Dropping PlatformView Frame
2024-04-09 14:01:14.605 19824-19824 VRI[MainActivity]       com.example.platform_view_test       D  visibilityChanged oldVisibility=true newVisibility=false
2024-04-09 14:01:14.677 19824-19824 WindowOnBackDispatcher  com.example.platform_view_test       W  sendCancelIfRunning: isInProgress=falsecallback=android.view.ViewRootImpl$$ExternalSyntheticLambda11@e05917c
2024-04-09 14:01:17.388 19824-19824 ContentCaptureHelper    com.example.platform_view_test       I  Setting logging level to OFF
2024-04-09 14:01:18.676 19824-19824 Compatibil...geReporter com.example.platform_view_test       D  Compat change id reported: 289878283; UID 10274; state: DISABLED
---------------------------- PROCESS ENDED (19824) for package com.example.platform_view_test ----------------------------

Flutter Doctor output

Doctor output

[✓] Flutter (Channel stable, 3.19.5, on macOS 14.4.1 23E224 darwin-arm64, locale en-FI)
    • Flutter version 3.19.5 on channel stable at /Users/romanlaitarenko/Downloads/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 300451adae (12 days ago), 2024-03-27 21:54:07 -0500
    • Engine revision e76c956498
    • Dart version 3.3.3
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/romanlaitarenko//Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /Users/romanlaitarenko//Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.15.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)

[✓] VS Code (version 1.87.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.86.0

[✓] Connected device (6 available)
    • Pixel 8 (mobile)            • 37280DLJH000VR                       • android-arm64  • Android 14 (API 34)
    • sdk gphone64 arm64 (mobile) • emulator-5554                        • android-arm64  • Android 14 (API 34) (emulator)
    • Roman’s iPhone (2) (mobile) • 00008110-00110D1614F9801E            • ios            • iOS 17.4.1 21E236
    • iPhone 15 Pro (mobile)      • AB1C69B3-AE98-458C-BD91-BEFAFF2357B0 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-17-4 (simulator)
    • macOS (desktop)             • macos                                • darwin-arm64   • macOS 14.4.1 23E224 darwin-arm64
    • Chrome (web)                • chrome                               • web-javascript • Google Chrome 123.0.6312.59

[✓] Network resources
    • All expected network resources are available.

• No issues found!

The text was updated successfully, but these errors were encountered:

darshankawar · 2024-04-10T06:11:59Z

Thanks for the report @evil159
Most likely you are hitting #139630 that you can check and confirm since you are also seeing similar behavior you mentioned on Samsung device running Android 14.

#139630 (comment) for your reference.

evil159 · 2024-04-10T06:17:05Z

@darshankawar Indeed the issue on Samsung can be explained by that, but there is a separate bug on Pixels then.

evil159 · 2024-04-10T11:30:27Z

@darshankawar I've updated this issue accordingly, could you take a look at this again?

I don't believe that the fix that Samsung is preparing for Galaxy will fix the issue on Pixel phones.

danagbemava-nc · 2024-04-11T07:23:14Z

I can reproduce the issue using the code sample and steps provided above. I turned on Don't keep activities to reproduce the issue.

On the stable channel, the screen becomes unresponsive but on the master channel, nothing is rendered on the screen after returning from the background.

The screen recordings were taking from the app running in release mode.

stable	master
screen-20240411-071658.mp4	screen-20240411-071434.mp4

flutter doctor -v

[!] Flutter (Channel stable, 3.19.5, on macOS 14.4.1 23E224 darwin-arm64, locale en-GB)
    • Flutter version 3.19.5 on channel stable at /Users/nexus/dev/sdks/flutter
    ! Warning: `flutter` on your path resolves to /Users/nexus/dev/sdks/flutters/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/nexus/dev/sdks/flutters/bin/dart, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 300451adae (2 weeks ago), 2024-03-27 21:54:07 -0500
    • Engine revision e76c956498
    • Dart version 3.3.3
    • DevTools version 2.31.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Users/nexus/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode-15.3.0.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.14.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.1)
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    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
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      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.5)
    • IntelliJ at /Users/nexus/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 77.2.2
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[✓] VS Code (version 1.87.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.86.0

[✓] Connected device (5 available)
    • Pixel 7 (mobile)     • 28291FDH2001SA            • android-arm64  • Android 14 (API 34)
    • Nexus (mobile)       • 00008020-001875E83A38002E • ios            • iOS 17.4.1 21E236
    • Dean’s iPad (mobile) • 00008103-000825C811E3401E • ios            • iOS 17.4.1 21E236
    • macOS (desktop)      • macos                     • darwin-arm64   • macOS 14.4.1 23E224 darwin-arm64
    • Chrome (web)         • chrome                    • web-javascript • Google Chrome 123.0.6312.107

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

[✓] Flutter (Channel master, 3.22.0-8.0.pre.17, on macOS 14.4.1 23E224 darwin-arm64, locale en-GB)
    • Flutter version 3.22.0-8.0.pre.17 on channel master at /Users/nexus/dev/sdks/flutters
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 61cbe2f5b7 (2 hours ago), 2024-04-11 01:44:16 -0400
    • Engine revision fef8499fb9
    • Dart version 3.5.0 (build 3.5.0-47.0.dev)
    • DevTools version 2.34.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Users/nexus/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
    • Xcode at /Applications/Xcode-15.3.0.app/Contents/Developer
    • Build 15E204a
    • CocoaPods version 1.14.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.1)
    • Android Studio at /Users/nexus/Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.5)
    • IntelliJ at /Users/nexus/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 77.2.2
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[✓] VS Code (version 1.87.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.86.0

[✓] Connected device (6 available)
    • Pixel 7 (mobile)                • 28291FDH2001SA            • android-arm64  • Android 14 (API 34)
    • Nexus (mobile)                  • 00008020-001875E83A38002E • ios            • iOS 17.4.1 21E236
    • Dean’s iPad (mobile)            • 00008103-000825C811E3401E • ios            • iOS 17.4.1 21E236
    • macOS (desktop)                 • macos                     • darwin-arm64   • macOS 14.4.1 23E224 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad     • darwin         • macOS 14.4.1 23E224 darwin-arm64
    • Chrome (web)                    • chrome                    • web-javascript • Google Chrome 123.0.6312.107

[✓] Network resources
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• No issues found!

johnmccutchan · 2024-04-11T22:57:28Z

I've been able to reproduce this issue on a Pixel 7 Pro.

johnmccutchan · 2024-04-15T19:24:46Z

I added a lot of traces to the engine and this is my current understanding of the bug:

After we resume the ImageReader.OnImageAvailableListener callback never fires again.

We continue to render frames and notify the engine that a frame is available but the image reader is never notified and when we ask the imagereader for its latest frame null is returned.

johnmccutchan · 2024-04-16T04:28:49Z

Another note:

The difference between stable and master is because flutter/engine#50792 removed the cached first frame. That is,

When stable resumes we use the last frame rendered before we were backgrounded.
When main resumes we have nothing to render and so you see the Flutter app's background color.

Both stable and master would be fixed if ImageReader.OnImageAvailableListener was firing as expected.

reidbaker · 2024-04-17T20:59:58Z

Was not able to reproduce with a pixel fold running an unreleased version of android 14.

pipit-userdebug UpsideDownCake MASTER 93172441 dev-keys

reidbaker · 2024-04-17T21:00:57Z

Was not able to reproduce with Nexus 6 running android 7.1.2 build number n2g47w

reidbaker · 2024-04-17T21:06:19Z

I was able to reproduce on a pixel 6 running android 14 build number AP1A.240405.002

johnmccutchan · 2024-04-18T00:45:07Z

Today's update:

We've tried versions of Flutter back to 2022 and none of them work correctly on Android 14 (to be more precise: there are some Android 14 builds that work and some that do not, early Android 15 builds are broken too).

We have not reproduced this issue on Android < 14.

Simplest reproduction steps:

Open sample app
Background sample app.
Launch the camera.
Background camera.
Use task switcher to select sample app.

We are trying to bisect on the Android side to understand more.

johnmccutchan · 2024-04-18T00:47:27Z

Also, it does not appear related to having a cached engine.

johnmccutchan · 2024-04-18T00:48:50Z

Also, rotating the phone will fix the app.

reidbaker · 2024-04-18T15:12:08Z

A coworker bisected this issue using an emulator and was able to find that the problematic android change happened between between build 10480234 (from 7/11/2023) and build 10488473 (from 7/12/2023).

Links for googlers
10480234:

Bug for the build https://b.corp.google.com/issues/290863690
Build info https://coastguard.corp.google.com/build/ZP1A.230712.001/
Bugs fixed https://groups.google.com/a/google.com/g/android-build-police/c/ijdTOnVtluI/m/Dr3UlwCWCAAJ

For the second build I can't find any records.
https://groups.google.com/a/google.com/g/android-build-police/search?q=after%3A2023-07-11%20before%3A2023-07-13%20

reidbaker · 2024-04-18T15:22:54Z

Build names appear to be
10480234 -> ZP1A.230712.001
10488473 -> ZP1A.230713.001
https://android-build.corp.google.com/build_explorer/branch/git_trunk-release/?gridSize=20&selectionType=START_BUILD_WINDOW&startBuildId=10488473&numBuilds=20&buildType=default

I think this url will let us search for changes but there were 1000 that landed.
https://android-build.corp.google.com/build_explorer/branch_dashboard/git_trunk-release/build_id/10488473/?gridSize=20&activeTarget=akita-user

reidbaker · 2024-04-18T15:25:34Z

From the android team a better way to search commits.
https://android-build.corp.google.com/range_search/cls/from_id/10488473/to_id/10480234/?s=menu&includeTo=0&includeFrom=1

- Destroy ImageReaders on memory trim. - Unset the VirtualDisplay's surface on memory trim. - On resume, recreate ImageReaders. - On resume, do a dumb little dance and then set the VirtualDisplay's surface Fixes: flutter/flutter#146499 Fixes: flutter/flutter#144219 Internal bug: b/335646931 Android Fix: https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/27015418 Unclear when the Android fix will be available in phones.

- Destroy ImageReaders on memory trim. - Unset the VirtualDisplay's surface on memory trim. - On resume, recreate ImageReaders. - On resume, do a dumb little dance and then set the VirtualDisplay's surface Fixes: flutter/flutter#146499 Fixes: flutter/flutter#144219 Internal bug: b/335646931 Android Fix: https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/27015418 Android 15 will include the fix. Unclear if Android 14 will be patched.

amrgetment · 2024-04-30T09:39:45Z

That’s a great effort from your team, people should see how the team is squeezing their brains to solve the flutter issues and make it a better framework
Thanks a lot

- Destroy ImageReaders on memory trim. - Unset the VirtualDisplay's surface on memory trim. - On resume, recreate ImageReaders. - On resume, do a dumb little dance and then set the VirtualDisplay's surface Fixes: flutter/flutter#146499 Fixes: flutter/flutter#144219 Internal bug: b/335646931 Android Fix: https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/27015418 Android 15 will include the fix. Unclear if Android 14 will be patched.

OnClickListener2048 · 2024-05-06T05:21:34Z

This is a great job and thanks all for making this progress so far.

lukehutch · 2024-05-06T09:21:56Z

This causes platform views to render transparent BUT the actual underlying views are still there and are interactable.

To the best of my knowledge, this issue does not appear when using the app regularly. It does not appear when backgrounded unless under memory pressure. Rotating the phone clears the condition. Evicting the app and relaunching clears the condition.

@reidbaker I see this problem on both Pixel 4 and Pixel 7 Pro. However, my symptoms are somewhat different than this description.

I get a "black screen of death" when backgrounding the app for some period of time, e.g. 5 minutes (presumably under memory pressure, but not always in any obvious way), then switching back to the app.
The app is not responsive in any way, but I don't get an ANR unless I attach the debugger and pause the running process for long enough.
I cannot connect a debugger to the running Flutter instance, which confirms that the app is not responsive under the black screen.
Rotating the screen does not clear the condition in my case.
The Back button pops the whole app, rather than what would be the current view in the app, which is another indication that the app is unresponsive.

Update: the Pixel 4 is actually running Android 13, not Android 14. The Pixel 7 Pro is running Android 14. Both exhibit the issue. So either this issue is not limited to Android 14, or there is another similar but not identical issue lurking that affects Android <14 too.

alpha2048 · 2024-05-07T17:25:23Z

Thank you to Flutter team for their hard work.
But when will the work around be available on the stable channel? Our users using Pixel are still having trouble.

reidbaker · 2024-05-07T18:05:02Z

3.22 has had the fix pr cherry picked into the engine. We are working on creating a new framework build that has the updated engine code. 3.22 is scheduled to land as stable sometime around the Google IO timeframe (next week).

Standard response below.

This issue has been fixed by flutter/engine#52370 To determine what versions of Flutter contain the fix, please see where’s my commit. If the commit has no release tag, it is currently only available in the master channel.

evil159 · 2024-05-16T12:28:50Z

Is this fixed in 3.22.0? Cannot find anything about flutter/engine#52370 in the release notes.

yh-luo · 2024-05-16T15:53:23Z

I think the fix is merged in 3793869.

I found that under flutter/engine/3.22.0. Also the fix was mentioned in What’s new in Flutter 3.22: Platform views improvements.

mr-pant · 2024-05-17T14:41:33Z

I see that this issue is fixed with Flutter 3.22.0 for the mentioned steps, but I see this happening following different steps instead. Now if the platform view is your initial page and you press back button to move app to background, on launching again, you will see that the blank issue is reproducible. (Steps are similar to #148347)
So looks like issue is still not fully fixed.

Another interesting thing is that after this, if you follow the steps for old issue i.e - switch from another recent app to sample app from recent apps launcher, the platform view starts working again.

Edit:
Created a bug for this : #148662

reidbaker · 2024-05-21T19:19:50Z

Promised update on the android fix.
The change to fix existing flutter apps (pre 3.22) on android 14 has been cherry picked into the July release of Pixel. I am still working on the escalation for other manufacturers.

darshankawar added the in triage Presently being triaged by the triage team label Apr 10, 2024

darshankawar added the waiting for customer response The Flutter team cannot make further progress on this issue until the original reporter responds label Apr 10, 2024

github-actions bot removed the waiting for customer response The Flutter team cannot make further progress on this issue until the original reporter responds label Apr 10, 2024

johnmccutchan self-assigned this Apr 11, 2024

johnmccutchan changed the title ~~Platform views with FlutterEngineCache freeze/disappear on resume~~ TLHC platform views on Android 14/15 stop updating on resume Apr 18, 2024

darshankawar added the e: OS-version specific Affects only some versions of the relevant operating system label Apr 18, 2024

auto-submit bot closed this as completed in flutter/engine#52370 Apr 30, 2024

darshankawar added the r: fixed Issue is closed as already fixed in a newer version label Apr 30, 2024

danagbemava-nc mentioned this issue Apr 30, 2024

[Android] After Samsung One UI 6.1 update, Webview is displayed as a white screen when resumed #147554

Closed

reidbaker mentioned this issue Apr 30, 2024

[CP] Workaround HardwareRenderer breakage in Android 14 #147578

Closed

reidbaker mentioned this issue Apr 30, 2024

Stable/3.19 CP Workaround HardwareRenderer breakage in Android 14 (#52370) flutter/engine#52459

Closed

8 tasks

reidbaker mentioned this issue May 1, 2024

[CP] Beta/3.22 Platform view android 14 workaround #147644

Open

moffatman mentioned this issue May 6, 2024

"Black screen of death" when resuming Flutter app on Android after several minutes in background #147849

Closed

darshankawar mentioned this issue May 10, 2024

Restoring app from background, results in webview_flutter showing a black screen. #148128

Closed

danagbemava-nc mentioned this issue May 13, 2024

Android 14. The map disappears when you return to the application #148203

Closed

darshankawar mentioned this issue May 17, 2024

[Android Emulator] Child pages are not rendered after exiting a nested initial page with the back gesture and launching from the Android launcher. #148347

Open

mr-pant mentioned this issue May 20, 2024

After exiting app with back button Platform views on Android 14 turn blank on resume. #148662

Closed

johnmccutchan mentioned this issue May 22, 2024

Fix another instance of platform view breakage on Android 14 flutter/engine#52980

Merged

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TLHC platform views on Android 14/15 stop updating on resume #146499

TLHC platform views on Android 14/15 stop updating on resume #146499

evil159 commented Apr 9, 2024 •

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darshankawar commented Apr 10, 2024

evil159 commented Apr 10, 2024 •

edited

evil159 commented Apr 10, 2024

danagbemava-nc commented Apr 11, 2024

johnmccutchan commented Apr 11, 2024

johnmccutchan commented Apr 15, 2024

johnmccutchan commented Apr 16, 2024

reidbaker commented Apr 17, 2024

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reidbaker commented Apr 17, 2024

johnmccutchan commented Apr 18, 2024 •

edited

johnmccutchan commented Apr 18, 2024

johnmccutchan commented Apr 18, 2024

reidbaker commented Apr 18, 2024

reidbaker commented Apr 18, 2024

reidbaker commented Apr 18, 2024

amrgetment commented Apr 30, 2024

OnClickListener2048 commented May 6, 2024

lukehutch commented May 6, 2024 •

edited

alpha2048 commented May 7, 2024

reidbaker commented May 7, 2024

evil159 commented May 16, 2024

yh-luo commented May 16, 2024

mr-pant commented May 17, 2024 •

edited

reidbaker commented May 21, 2024

TLHC platform views on Android 14/15 stop updating on resume #146499

TLHC platform views on Android 14/15 stop updating on resume #146499

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evil159 commented Apr 9, 2024 • edited

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