Android上的Firebase需要什么ProGuard配置？ [英] What ProGuard configuration do I need for Firebase on Android?

问题描述

使用适用于Android应用的 Firebase SDK时，我不断收到类似下面的警告和错误（在Eclipse中）：

 警告...找不到引用的类... 
警告：有未解析的对类或接口的引用... 
您可能需要指定额外的库jar（使用'-libraryjars'）... 
  

不幸的是，Firebase没有任何有关ProGuard使用的官方文档。

当我的应用程序使用Firebase成功编译版本时，需要什么指令使用ProGuard进行混淆？

解决方案

基于我的个人测试，结果发现Firebase增强的Android应用使用ProGuard进行编译。

无论如何，您必须添加 -keepnames class com.my.package.beans。** {*; } 如果您在Firebase中使用自定义对象，即bean或POJO。

$ b

Firebase SDK 1.0.18：

  -keepnames class com.firebase。** {*; } 
 -keepnames class com.shaded.fasterxml.jackson。** {*; } 
 -keepnames class org.shaded.apache。** {*; } 
 -keepnames class javax.servlet。** {*; } 
 -dontwarn org.w3c.dom。** 
 -dontwarn org.joda.time。** 
 -dontwarn org.shaded.apache.commons.logging.impl。** 
  

Firebase SDK 1.1.1：

  -keep class com.firebase。** {*; } 
 -keep class org.shaded.apache。** {*; } 
 -keepnames class com.shaded.fasterxml.jackson。** {*; } 
 -keepnames class javax.servlet。** {*; } 
 -keepnames class org.ietf.jgss。** {*; } 
 -dontwarn org.w3c.dom。** 
 -dontwarn org.joda.time。** 
 -dontwarn org.shaded.apache。** 
 -dontwarn org .ietf.jgss。** 
  

Firebase SDK 2.0.0：

  -keep class com.firebase。** {*; } 
 -keep class org.apache。** {*; } 
 -keepnames class com.fasterxml.jackson。** {*; } 
 -keepnames class javax.servlet。** {*; } 
 -keepnames class org.ietf.jgss。** {*; } 
 -dontwarn org.w3c.dom。** 
 -dontwarn org.joda.time。** 
 -dontwarn org.shaded.apache。** 
 -dontwarn org .ietf.jgss。** 
 
＃只有在您直接下载SDK jar而不是maven时才需要。 
 -keep class com.shaded.fasterxml.jackson。** {*; } 
  

最后的手段：

  -keep class！com.my.package。** {*; } 
  

注意：

任何官方指引将受到欢迎。 -dontwarn 指令显然是危险的，代码可能在我没有测试的地方断开。此外，上述规则是相当宽容的，其他规则可能会更好地优化您的APK。

When using the Firebase SDK for Android apps, I keep getting warnings and errors like these (in Eclipse):

Warning ... can't find referenced class ...
Warning: there were ... unresolved references to classes or interfaces ...
You may need to specify additional library jars (using '-libraryjars') ...

Unfortunately, Firebase doesn't have any official documentation about its use with ProGuard.

What directives do I need for my apps to successfully compile releases with Firebase when obfuscated with ProGuard?

解决方案

Based on my personal tests, it turned out something along these lines is necessary for Firebase-enhanced Android apps to compile with ProGuard.

In any case, you have to add -keepnames class com.my.package.beans.** { *; } if you are using custom objects in your Firebase, i.e. beans or POJOs.

Firebase SDK 1.0.18:

-keepnames class com.firebase.** { *; }
-keepnames class com.shaded.fasterxml.jackson.** { *; }
-keepnames class org.shaded.apache.** { *; }
-keepnames class javax.servlet.** { *; }
-dontwarn org.w3c.dom.**
-dontwarn org.joda.time.**
-dontwarn org.shaded.apache.commons.logging.impl.**

Firebase SDK 1.1.1:

-keep class com.firebase.** { *; }
-keep class org.shaded.apache.** { *; }
-keepnames class com.shaded.fasterxml.jackson.** { *; }
-keepnames class javax.servlet.** { *; }
-keepnames class org.ietf.jgss.** { *; }
-dontwarn org.w3c.dom.**
-dontwarn org.joda.time.**
-dontwarn org.shaded.apache.**
-dontwarn org.ietf.jgss.**

Firebase SDK 2.0.0:

-keep class com.firebase.** { *; }
-keep class org.apache.** { *; }
-keepnames class com.fasterxml.jackson.** { *; }
-keepnames class javax.servlet.** { *; }
-keepnames class org.ietf.jgss.** { *; }
-dontwarn org.w3c.dom.**
-dontwarn org.joda.time.**
-dontwarn org.shaded.apache.**
-dontwarn org.ietf.jgss.**

# Only necessary if you downloaded the SDK jar directly instead of from maven.
-keep class com.shaded.fasterxml.jackson.** { *; }

Last resort:

-keep class !com.my.package.** { *; }

Notes:

Any official guideline would be welcome. The -dontwarn directives are obviously dangerous, code may break at points that I have not tested. Furthermore, the above rules are quite permissive and other rules may better optimize your APKs.

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