Upgrading firebase-crash caused error building apk

Question

I originally added firebase crash reporting using Android firebase assistant in android studio. Which added firebase-crash:10.0.1. Now i am want access some methods added in later version so i upgraded it to to firebase-crash:11.2.0.

This is where the problem starts

I used this guide to make changes in my gradle.build (Module:app)

• Changed compile 'com.google.firebase:firebase-crash:10.0.1' to compile 'com.google.firebase:firebase-crash:11.2.0'

At this point gradle sync failed. To resolve this i modified build.gradle (Project) with

allprojects {
    repositories {
        jcenter()
        //Added this code
        maven {
            url "https://maven.google.com" // Google's Maven repository
        }
    }
}

Gradle build sync completed succesfully. Now i tried building debug apk and i received this error

Error:Execution failed for task ':app:transformClassesWithDexForDebug'. com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/google/android/gms/internal/zzbvb;

To fix this issue i modified buil.gradle(Modeule:app)

 defaultConfig{
        ///...
        multiDexEnabled true
        ///...
    }

And now i am able to generate debug-build apk. But generating signed apk gives following error with 1588 warnings & 1 error.

Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'. Job failed, see logs for details

This is where i am stuck. I am not able to resolve this issue. I tried several methods including clean/rebuild and invalidate cache & restart. Also tried adding -ignorewarning -dontwarn -keep class { public private} none of them seems to work.

Error in console on generating signed apk

build.gradle(Project)

build.gradle(Module:app)

Update

Adding this line compile 'com.google.android.gms:play-services:11.2.0 in build.gradle (Module:app) does build signed apk successfully. But shows following warnings.

I am confused

Answer 1

Using the Firebase version 11.2.0 (that has a dependency with Google play services v.11.2.0), you should use also the support libraries v26.

In your case:

compile 'com.android.support:appcompat-v7:26.0.1'
compile 'com.android.support:design:26.0.1'
compile 'com.android.support:support-v13:26.0.1'

Also you have to use:

compileSdkVersion 26

More info here.