1、使用 flutter build apk 打包，这时报错，内容如下：
FAILURE: Build failed with an exception.
* Where:
Script 'E:\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1035
* What went wrong:
Execution failed for task ':app:compileFlutterBuildRelease'.
> Process 'command 'E:\flutter\bin\flutter.bat'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1m 4s
Running Gradle task 'assembleRelease'... 67.7s
Gradle task assembleRelease failed with exit code 1
Process finished with exit code 1这时并不能发现具体的错误的原因，因为全是flutter自己的错误，并非我们代码的问题。
2、需要使用
flutter build apk --release -vv 这时就会输出更详细的错误，错误的内容如下：
[ +2 ms] [ +16 ms] Done persisting file store
[ +1 ms] [ +9 ms] Target android_aot_release_android-arm64 failed: ProcessException: Failed to find
"E:\flutter\bin\cache\artifacts\engine\android-arm64-release\windows-x64\gen_snapshot" in the search path.
[ +2 ms] Command: E:\flutter\bin\cache\artifacts\engine\android-arm64-release\windows-x64\gen_snapshot
[ +1 ms] #0 LocalProcessManager.start (package:process/src/interface/local_process_manager.dart:58:7)
[ +1 ms] #1 ErrorHandlingProcessManager.start.<anonymous closure>
(package:flutter_tools/src/base/error_handling_io.dart:664:24)
[ +1 ms] #2 _run (package:flutter_tools/src/base/error_handling_io.dart:544:20)
[ +1 ms] #3 ErrorHandlingProcessManager.start
(package:flutter_tools/src/base/error_handling_io.dart:663:12)
[ +4 ms] #4 _DefaultProcessUtils.start (package:flutter_tools/src/base/process.dart:425:28)
[ +3 ms] #5 _DefaultProcessUtils.stream (package:flutter_tools/src/base/process.dart:444:35)
[ +1 ms] #6 GenSnapshot.run (package:flutter_tools/src/base/build.dart:75:26)
[ +1 ms] #7 AOTSnapshotter.build (package:flutter_tools/src/base/build.dart:209:56)
[ +4 ms] #8 AndroidAot.build (package:flutter_tools/src/build_system/targets/android.dart:247:52)
[ +4 ms] #9 _BuildInstance._invokeInternal
(package:flutter_tools/src/build_system/build_system.dart:828:27)
[ +1 ms] <asynchronous suspension>
[ +3 ms] #10 Future.wait.<anonymous closure> (dart:async/future.dart)
[ +1 ms] <asynchronous suspension>
[ +1 ms] #11 _BuildInstance.invokeTarget
(package:flutter_tools/src/build_system/build_system.dart:766:32)这时显示 E:\flutter\bin\cache\artifacts\engine\android-arm64-release\windows-x64\gen_snapshot 这个文件没有找到，去目录看一下，果然没有，因为被360给杀掉了，所以恢复一下。
希望能帮到大家！