Flutter app Android studio 3.2.1，构建失败答案

【问题标题】：Flutter app Android studio 3.2.1, build failFlutter app Android studio 3.2.1，构建失败
【发布时间】：2019-03-31 21:14:37
【问题描述】：

我将 Android Studio 更新到 3.2.1 并在 Mac 的终端中运行“flutter build apk”，它显示以下错误。在更新 Android Studio 之前，我能够成功构建 apk。

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.
> Job failed, see logs for details

这里是我的 proguard-rules.pro

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-keep class com.google.firebase.** { *; }

【问题讨论】：

stackoverflow.com/q/33877134/10269042

标签： build flutter apk proguard

【解决方案1】：

这解决了我的问题，

 #Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-dontwarn android.**

在这里查看解释： https://github.com/flutter/flutter/issues/40218#issuecomment-531047713

【讨论】：

【解决方案2】：

转到 android/app/build.gradle 并尝试 minifyEnabled false 它应该可以工作

【讨论】：