How to fix Proguard issue with Google Drive REST API

Question

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

Answer 1

This one worked for me:

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

As seen in the official google sample:

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

Answer 2

You need

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

and

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

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

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.

Answer 3

In my case I had to put these keeps:

-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.