NoSuchMethodError: The method was called on null — Flutter

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:

Expert

Bruno Garcia

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