如何使用Google Drive SDK为Android应用配置proguard？

Question

[当在构建Quickstart: Run a Drive App on Android示例应用程序时Eclipse包含proguard时，该应用程序将失去其上传文件的能力。

鉴于在没有proguard的情况下构建的应用程序的发行版可以正常工作，因此Google API客户端ID似乎配置正确。但是，在启用了proguard的Eclipse中构建时，同一发行版应用程序的文件上传不起作用。这是我有问题的proguard配置文件：

# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

-libraryjars /libs/android-support-v4.jar
-libraryjars /libs/google-api-client-1.13.2-beta.jar
-libraryjars /libs/google-api-client-android-1.13.2-beta.jar
-libraryjars /libs/google-api-services-drive-v2-rev70-1.13.2-beta.jar
-libraryjars /libs/google-http-client-1.13.1-beta.jar
-libraryjars /libs/google-http-client-android-1.13.1-beta.jar
-libraryjars /libs/google-http-client-gson-1.13.1-beta.jar
-libraryjars /libs/google-http-client-jackson-1.13.1-beta.jar
-libraryjars /libs/google-http-client-jackson2-1.13.1-beta.jar
-libraryjars /libs/google-http-client-protobuf-1.13.1-beta.jar
-libraryjars /libs/google-oauth-client-1.13.1-beta.jar
-libraryjars /libs/gson-2.1.jar
-libraryjars /libs/guava-jdk5-13.0.jar
-libraryjars /libs/jackson-core-2.0.5.jar
-libraryjars /libs/jackson-core-asl-1.9.9.jar
-libraryjars /libs/jsr305-1.3.9.jar
-libraryjars /libs/protobuf-java-2.4.1.jar

# Add any project specific keep options here:

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

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}

这是logcat中显示的结果错误：

D/ALSAModule(  162): setHardwareParams: reqBuffSize 1024 channels 2 sampleRate 48000
D/ALSAModule(  162): setHardwareParams: buffer_size 2048, period_size 1024, period_cnt 2
W/System.err(10707): com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden
W/System.err(10707): {
W/System.err(10707):   "code": 403,
W/System.err(10707):   "errors": [
W/System.err(10707):     {
W/System.err(10707):       "domain": "usageLimits",
W/System.err(10707):       "message": "Access Not Configured",
W/System.err(10707):       "reason": "accessNotConfigured"
W/System.err(10707):     }
W/System.err(10707):   ],
W/System.err(10707):   "message": "Access Not Configured"
W/System.err(10707): }
W/System.err(10707):    at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.b(Unknown Source)
W/System.err(10707):    at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.a(Unknown Source)
W/System.err(10707):    at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.b(Unknown Source)
W/System.err(10707):    at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.d(Unknown Source)
W/System.err(10707):    at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.e(Unknown Source)
W/System.err(10707):    at com.example.testupload2.a.run(Unknown Source)
W/System.err(10707):    at java.lang.Thread.run(Thread.java:856)
D/overlay (  159): Unset pipe=VG0 dpy=0; Unset pipe=RGB1 dpy=0;
D/alsa_ucm(  162): snd_use_case_set(): uc_mgr 0x40e59388 identifier _verb value Inactive
D/alsa_ucm(  162): Set mixer controls for HiFi Lowlatency enable 0
D/alsa_ucm(  162): snd_use_case_set(): uc_mgr 0x40e59388 identifier _disdev value Camcorder Tx

我是一名保镖新手。关于正确的proguard配置应该有什么提示？

UPDATE：我将此问题提交给了Android问题跟踪器（issue 54765）。

UPDATE 2：现在，在Google Play服务中实现了Google Drive Android API，我的应用程序大小已减小，并且proguard的设置为thoroughly documented。两者都是好东西。

Answer 1

在proguard-google-api-client.txt中使用以下内容来保留所需的属性和类成员。

-keepattributes Signature,RuntimeVisibleAnnotations,AnnotationDefault

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

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

# Needed by google-http-client-android when linking against an older platform version
-dontwarn com.google.api.client.extensions.android.**

# Needed by google-api-client-android when linking against an older platform version
-dontwarn com.google.api.client.googleapis.extensions.android.**

Answer 2

只需在proguard-project.txt中添加以下两行

-keep class com.google.android.gms.** { ; }
-dontwarn com.google.android.gms.*

Answer 3

如果您使用的是Google Drive API v3，则只需要那些：

-keep class * extends com.google.api.client.json.GenericJson {*;}
-keep class com.google.api.services.drive.** {*;}
-keep class com.google.api.client.** {*;}