NoSuchMethodError: The Method was Called on null — Flutter
Bruno Garcia
The Problem
Flutter Android Gradle tool issue: NoSuchMethodError: The method ‘reinitialize’ was called on null
NoSuchMethodError: The method 'reinitialize' was called on null.
Receiver: null
Tried calling: reinitialize()
#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:53:5)
#1 _AndroidBuilderImpl.buildAab (package:flutter_tools/src/android/android_builder.dart:125:18)
<asynchronous suspension>
#2 BuildAppBundleCommand.runCommand (package:flutter_tools/src/commands/build_appbundle.dart:77:26)
#3 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:615:18)
<asynchronous suspension>
#4 FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:515:33)
<asynchronous suspension>
#5 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:146:29)
#6 _rootRun (dart:async/zone.dart:1126:13)
#7 _CustomZone.run (dart:async/zone.dart:1023:19)
#8 _runZoned (dart:async/zone.dart:1518:10)
#9 runZoned (dart:async/zone.dart:1465:12)
#10 AppContext.run (package:flutter_tools/src/base/context.dart:145:18)
#11 FlutterCommand.run (package:flutter_tools/src/runner/flutter_command.dart:505:20)
#12 CommandRunner.runCommand (package:args/command_runner.dart:197:27)
#13 FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:413:21)
<asynchronous suspension>
#14 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:146:29)
#15 _rootRun (dart:async/zone.dart:1126:13)
#16 _CustomZone.run (dart:async/zone.dart:1023:19)
#17 _runZoned (dart:async/zone.dart:1518:10)
#18 runZoned (dart:async/zone.dart:1465:12)
#19 AppContext.run (package:flutter_tools/src/base/context.dart:145:18)
#20 FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:364:19)
#21 CommandRunner.run.<anonymous closure> (package:args/command_runner.dart:112:25)
#22 new Future.sync (dart:async/future.dart:224:31)
#23 CommandRunner.run (package:args/command_runner.dart:112:14)
#24 FlutterCommandRunner.run (package:flutter_tools/src/runner/flutter_command_runner.dart:250:18)
#25 run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:63:22)
#26 _rootRun (dart:async/zone.dart:1126:13)
#27 _CustomZone.run (dart:async/zone.dart:1023:19)
#28 _runZoned (dart:async/zone.dart:1518:10)
#29 runZoned (dart:async/zone.dart:1502:12)
#30 run.<anonymous closure> (package:flutter_tools/runner.dart:61:18)
<asynchronous suspension>
#31 AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:146:29)
#32 _rootRun (dart:async/zone.dart:1126:13)
#33 _CustomZone.run (dart:async/zone.dart:1023:19)
#34 _runZoned (dart:async/zone.dart:1518:10)
#35 runZoned (dart:async/zone.dart:1465:12)
#36 AppContext.run (package:flutter_tools/src/base/context.dart:145:18)
#37 runInContext (package:flutter_tools/src/context_runner.dart:64:24)
#38 run (package:flutter_tools/runner.dart:50:10)
#39 main (package:flutter_tools/executable.dart:65:9)
#40 main (file:///Users/travis/build/bruno-garcia/crashy/flutter/packages/flutter_tools/bin/flutter_tools.dart:8:3)
#41 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:305:32)
#42 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)
The Solution
Make sure the Android tools of the correct version in available. For example:
android {
compileSdkVersion 29
buildToolsVersion '29.0.0'
}
In this case, make sure you’ve install Android Build Tools 29.0.0, otherwise Flutter will fail with the error above.
Further Reading
If you’re looking to get a deeper understanding of how Flutter application monitoring works, take a look at the following articles: