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androidfluttervisual-studio-codeapk

Flutter run stuck at "Installing build\...\app.apk" if run by VS Code

I'm trying to run a Flutter app on a physical Android device using Visual Studio Code with the Dart Code/Flutter extension (which used to work).

But when I try to start the app, it is stuck at Installing build\app\outputs\apk\app.apk... and a white screen appears on my phone.

I know that there are already a number of threads on this topic1 2 3, but the suggested solutions did not work for me, including:

  • Rebooting my phone and my computer
  • Uninstalling the app
  • flutter clean
  • Building the app using flutter build, manually installing the app-debug.apk* and then starting the app from VS Code again
  • Uninstalling the app using adb uninstall and installing app.apk using adb install
  • Clearing cache and storing from the app settings before uninstalling
  • Revoking USB debugging authorizations
  • Disabling Play Protect on my phone
  • Increasing the Logger Buffer Size in my phone's developer options

*after installing the APK file myself, the app worked, but of course I had no debugging capabilities

When I execute flutter run in the terminal, the app opens on my phone and works fine. However hot reload does not work and only the following is printed out:

$ flutter run -d FA685YJ01209
Launching lib/main.dart on HTC One M9 in debug mode...
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                         4.0s
✓ Built build/app/outputs/apk/debug/app-debug.apk.

It is not possible to attach to that process from Visual Studio Code either.

I also tried to start the app on an emulator using Visual Studio Code. In that case, it gets stuck at Syncing files to device Android SDK built for x86....

$ flutter doctor -v
[✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Linux, locale en_US.UTF-8)
    • Flutter version 1.12.13+hotfix.8 at /opt/flutter
    • Framework revision 0b8abb4724 (7 weeks ago), 2020-02-11 11:44:36 -0800
    • Engine revision e1e6ced81d
    • Dart version 2.7.0


[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /home/scriptim/Dev/Android/SDK/
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /opt/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    • All Android licenses accepted.

[!] Android Studio (version 3.6)
    • Android Studio at /opt/android-studio
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] Connected device (1 available)
    • HTC One M9 • FA685YJ01209 • android-arm64 • Android 7.0 (API 24)

! Doctor found issues in 1 category.
Solution

  • Apparently there were changes on the stable branch that solved the problem. After a git pull everything works fine. Unfortunately I can't figure out where exactly the problem was.