Local module descriptor class for com.google.firebase.auth not found

问题

I tried firebase authentication to create an user. While creating an user i am getting the following error stack.

> 07-27 07:37:26.385 30248-30261/com.belleza.mewChat W/DynamiteModule:
> Local module descriptor class for com.google.firebase.auth not found.
> 07-27 07:37:26.385 30248-30261/com.belleza.mewChat W/DynamiteModule:
> Local module descriptor class for com.google.firebase.auth not found.
> 07-27 07:37:27.140 30248-30248/com.belleza.mewChat D/Login:
> createUser:onComplete:false 07-27 07:37:27.311
> 30248-30267/com.belleza.mewChat V/RenderScript: 0xb8b54170 Launching
> thread(s), CPUs 8 07-27 07:37:36.501 30248-30261/com.belleza.mewChat
> W/DynamiteModule: Local module descriptor class for
> com.google.firebase.auth not found.

I have added SHA key for my project in firebase console. In gradle also upgraded to latest versions.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.belleza.mewChat"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
    compile 'com.android.support:support-v4:23.4.0'
    compile 'com.hbb20:ccp:1.5.1'

    //firebase database,ui
    compile 'com.firebaseui:firebase-ui-database:0.4.1'
    compile 'com.google.firebase:firebase-database:9.2.0'

    //firebase auth
    compile 'com.google.android.gms:play-services-auth:9.2.0'
    compile 'com.google.firebase:firebase-auth:9.2.0'
}
apply plugin: 'com.google.gms.google-services'

回答1:

this error may also raise if password provided is less than 6 characters

回答2:

When I set

...
release {
    minifyEnabled true
    ...
}
...

in my build.gradle this solved my problem.

回答3:

In my case, that error was caused by having an outdated version of Google Play services on my emulator device. The problem was solved by updating Google Play services from the Google Play Store.

来源：https://stackoverflow.com/questions/38602672/local-module-descriptor-class-for-com-google-firebase-auth-not-found