[android-developers] I'm getting a ClassNotFoundException from play services lib when using Proguard

[Jason Atwood]

I just turned on ProGuard on my build and now I'm getting a 

java.lang.ClassNotFoundException: Didn't find class 
"com.google.android.gms.chimera.GmsModuleInitializer" on path: 
DexPathList[[zip file 
"/system/app/PlayGames.apk"],nativeLibraryDirectories=[/vendor/lib, 
/system/lib]]


If I understand from the docs all that I need to use Proguard with Play 
Services should be included by the Android Gradle plugin:

*Note: ProGuard directives are included in the Play services client 
libraries to preserve the required classes. The Android Plugin for Gradle 
<https://developer.android.com/tools/building/plugin-for-gradle.html> 
automatically appends ProGuard configuration files in an AAR (Android 
ARchive) package and appends that package to your ProGuard configuration. 
During project creation, Android Studio automatically creates the ProGuard 
configuration files and build.gradle properties for ProGuard use. To use 
ProGuard with Android Studio, you must enable the ProGuard setting in your 
build.gradle buildTypes. For more information, see the ProGuard 
<https://developer.android.com/tools/help/proguard.html> guide.*

This the important part of my app module build.gradle file:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"
    defaultConfig {
        ...
    }
    ...
    buildTypes {
        release {
            signingConfig signingConfigs.releaseConfig
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
                    'proguard-rules.pro'
        }
        qa {
            signingConfig signingConfigs.releaseConfig
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
                    'proguard-rules.pro'
        }
        debug {
            applicationIdSuffix ".debug"
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
                    'proguard-rules.pro'
        }
    }
}


dependencies {
    ...

    //google play services
    compile 'com.google.android.gms:play-services-gcm:8.4.0'
    compile 'com.google.android.gms:play-services-analytics:8.4.0'
    compile 'com.google.android.gms:play-services-location:8.4.0'
}



This is my top level build.gradle file:


// Top-level build file where you can add configuration options common to all 
sub-projects/modules.
buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'
    }
}

allprojects {
    repositories {
        jcenter()
        mavenCentral()
    }
}


What am I missing?

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