Failed to build release for Android devices. No issue on iOS devices.

[zinwalin]

RMBP➜ FlutterCinematic git:(master) ✗ >flutter run -d all --release Running "flutter packages get" in FlutterCinematic... 0.5s Initializing gradle... 0.9s Resolving dependencies... 1.8s Launching lib/main.dart on MI 6 in release mode... Running 'gradlew assembleRelease'... VMIsolate(CodeSize): 4613 Isolate(CodeSize): 1699574 ReadOnlyData(CodeSize): 2484048 Instructions(CodeSize): 5880224 Total(CodeSize): 10068459 Gradle build failed to produce an Android package.

[zinwalin]

verbose:

[ +419 ms] "flutter run" took 9,906ms. Gradle build failed to produce an Android package.

0 throwToolExit (package:flutter_tools/src/base/common.dart:28)

1 _buildGradleProjectV2 (package:flutter_tools/src/android/gradle.dart:408)

#2 buildGradleProject (package:flutter_tools/src/android/gradle.dart:318) #3 buildApk (package:flutter_tools/src/android/apk.dart:36) #4 AndroidDevice.startApp (package:flutter_tools/src/android/android_device.dart:377) #5 FlutterDevice.runCold (package:flutter_tools/src/resident_runner.dart:349) #6 ColdRunner.run (package:flutter_tools/src/run_cold.dart:54) #7 RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:395) #8 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:344) #9 FlutterCommand.run. (package:flutter_tools/src/runner/flutter_command.dart:279) #10 AppContext.run. (package:flutter_tools/src/base/context.dart:142) #11 _rootRun (dart:async/zone.dart:1126) #12 _CustomZone.run (dart:async/zone.dart:1023) #13 runZoned (dart:async/zone.dart:1501) #14 AppContext.run (package:flutter_tools/src/base/context.dart:141) #15 FlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:270) #16 CommandRunner.runCommand (package:args/command_runner.dart:194) #17 FlutterCommandRunner.runCommand. (package:flutter_tools/src/runner/flutter_command_runner.dart:309) #18 AppContext.run. (package:flutter_tools/src/base/context.dart:142) #19 _rootRun (dart:async/zone.dart:1126) #20 _CustomZone.run (dart:async/zone.dart:1023) #21 runZoned (dart:async/zone.dart:1501) #22 AppContext.run (package:flutter_tools/src/base/context.dart:141) #23 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:265) #24 CommandRunner.run. (package:args/command_runner.dart:109) #25 new Future.sync (dart:async/future.dart:222) #26 CommandRunner.run (package:args/command_runner.dart:109) #27 FlutterCommandRunner.run (package:flutter_tools/src/runner/flutter_command_runner.dart:174) #28 run. (package:flutter_tools/runner.dart:59) #29 AppContext.run. (package:flutter_tools/src/base/context.dart:142) #30 _rootRun (dart:async/zone.dart:1126) #31 _CustomZone.run (dart:async/zone.dart:1023) #32 runZoned (dart:async/zone.dart:1501) #33 AppContext.run (package:flutter_tools/src/base/context.dart:141) #34 runInContext (package:flutter_tools/src/context_runner.dart:43) #35 run (package:flutter_tools/runner.dart:50) #36 main (package:flutter_tools/executable.dart:49) #37 main (file:///Users/michael/Development/flutter/packages/flutter_tools/bin/flutter_tools.dart:8) #38 _startIsolate. (dart:isolate-patch/dart:isolate/isolate_patch.dart:277) #39 _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)

[amit-bhandari]

I faced the same issue.

I was able to successfully create debug package by giving 'flutter build apk --debug'

For creating release build, I created key.jks (followed this doc https://flutter.io/android-release/ ) and voilla, got the release apk.