I'm using the Google Rest API v3 to connect my android app to Google Drive. When I run without Proguard (minifyEnabled=false), all is well. However, when I enable proguard the wrong REST API methods are called. When I call Drive.Files.get().execute on the drive root alias "root" I get the result for a Drive.Files.list().execute. When I disable "minifyEnabled" I see the correct result. Here is the section of the build.gradle that controls running Proguard:

我正在使用谷歌REST API v3将我的Android应用程序连接到Google Drive。当我在没有ProGuard的情况下运行(minifyEnabled=False)时，一切都很好。然而，当我启用保护时，调用了错误的REST API方法。当我在驱动器根别名“root”上调用Drive.Files.get().ecute时，我得到了Drive.Files.list().ecute的结果。当我禁用“minifyEnabled”时，我看到了正确的结果。以下是build.gradle中控制Running ProGuard的部分：

buildTypes {
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
    debug {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

The default Proguard file is the unmodified one that gets distributes with Android Studio 2.2 (not the optimized version)

默认的ProGuard文件是随Android Studio2.2分发的未经修改的文件(不是优化版本)

And this is the contents of my proguard-rules.pro file

这是我的proGuard-rules.pro文件的内容

-keepattributes EnclosingMethod
-keepattributes InnerClasses
-dontoptimize

-keep class com.google.**
-keep class com.fasterxml.**
-dontwarn com.google.**

When I check in the generated mapping.txt I still see renamed members in classes that imo shoudl have been "kept". For example:

当我检查生成的mapping.txt时，我仍然看到在imo应该“保留”的类中重命名的成员。例如：

com.google.api.client.auth.oauth.OAuthParameters -> com.google.api.client.auth.oauth.OAuthParameters:
java.security.SecureRandom RANDOM -> l
com.google.api.client.auth.oauth.OAuthSigner signer -> a
java.lang.String callback -> b
java.lang.String consumerKey -> c
java.lang.String nonce -> d
java.lang.String realm -> e

Com.google.api.client.auth.oauth.OAuthParameters->com.google.api.client.auth.oauth.OAuthParameters：java.security.SecureRandom->L com.google.api.client.auth.oauth.OAuthSigner签名者->a java.lang.StringCallback->b java.lang.StringConsumer erKey->c java.lang.Stringnonce->d java.lang.StringRealm->e

I would have thought "-keep class com.google.** " would have avoided this?

我会想，“--保持类com.google.**”会避免这种情况吗？

Any idea how to fix this?

你知道怎么解决这个问题吗？

THanks in advance,

提前谢谢你，

This one worked for me:

这个办法对我很管用：

-keepclassmembers class * {
  @com.google.api.client.util.Key <fields>;
}

As seen in the official google sample:

正如谷歌官方样本所示：

https://github.com/google/google-api-java-client-samples/blob/master/tasks-android-sample/proguard-google-api-client.txt

Https://github.com/google/google-api-java-client-samples/blob/master/tasks-android-sample/proguard-google-api-client.txt

You need

你需要

-keep class com.google.** { *;} 

and

和

-keep class com.fasterxml.** { *;}

Also you might try to keep less from the SDK. These rules are very wide.

此外，您可能会尝试对SDK保留较少的内容。这些规则非常宽泛。

Edit:
Wide rules means that it probably will keep more unused classes in your project hence the apk size and method count will be bigger.

编辑：宽规则意味着它可能会在您的项目中保留更多未使用的类，因此APK大小和方法计数将会更大。

In my case I had to put these keeps:

在我的案例中，我不得不把这些保留：

-keep class br.project.pine.** { *;}
-keep class com.google.api.services.drive.** { *;}

Tip: When enabling minify in debug mode, pay attention to the LogCat. It can help you to find out the real missing package/class/attribute.

提示：在调试模式下启用minify时，请注意logcat。它可以帮助您找出真正缺失的包/类/属性。

This worked for me. Thank you.

这对我很管用。谢谢。

-keepattributes Signature,RuntimeVisibleAnnotations,AnnotationDefault
-keepclassmembers class * {
  @com.google.api.client.util.Key <fields>;
}
-dontwarn com.google.api.client.extensions.android.**
-dontwarn com.google.api.client.googleapis.extensions.android.**
-dontwarn com.google.android.gms.**
-dontnote java.nio.file.Files, java.nio.file.Path
-dontnote **.ILicensingService
-dontnote sun.misc.Unsafe
-dontwarn sun.misc.Unsafe
-keep class * extends com.google.api.client.json.** { *; }
-keep class * extends com.google.api.client.util.** { *; }
-keep class com.google.api.services.drive.** { *; }