app crashing at FirebaseInstanceId.getInstance().getToken()

Question

I´m trying to get token by using FirebaseInstanceId.getInstance().getToken() in my MainActivity.java but when I use this method to get token, app stars crashing.

Here's my onCreate() method

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toast.makeText(MainActivity.this, FirebaseInstanceId.getInstance().getToken(), Toast.LENGTH_SHORT).show();
}

Build.gradle (Project Level)

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath 'com.google.gms:google-services:3.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Build.gradle (App level)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId "com.simple.app"
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

    compile ('com.android.support:appcompat-v7:25.0.1')
            {
                force=true
            }
    compile ('com.android.support.constraint:constraint-layout:1.0.2')
            {
                force=true
            }

    compile ('com.android.support:design:25.0.1')
            {
                force=true
            }
    compile 'com.firebaseui:firebase-ui:0.6.2'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.theartofdev.edmodo:android-image-cropper:2.4.+'
    compile ('com.android.support:support-v4:25.3.1')
            {
                force=true
            }
    compile ('com.google.firebase:firebase-messaging:9.2.0')
            {
                force=true
            }

    testCompile 'junit:junit:4.12'}
apply plugin: 'com.google.gms.google-services'

Logcat

07-25 20:25:20.903 4563-4563/com.simple.app D/AndroidRuntime: Shutting down VM
07-25 20:25:20.907 4563-4563/com.simple.app E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.simple.app, PID: 4563
java.lang.NoSuchMethodError: No static method getNoBackupFilesDir(Landroid/content/Context;)Ljava/io/File; in class Lcom/google/android/gms/common/util/zzx; or its super classes (declaration of 'com.google.android.gms.common.util.zzx' appears in /data/app/com.simple.app-2/split_lib_dependencies_apk.apk:classes42.dex)
    at com.google.firebase.iid.zzg.zzkg(Unknown Source)
    at com.google.firebase.iid.zzg.<init>(Unknown Source)
    at com.google.firebase.iid.zzg.<init>(Unknown Source)
    at com.google.firebase.iid.zzd.zzb(Unknown Source)
    at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
    at com.google.firebase.iid.FirebaseInstanceId.getInstance(Unknown Source)
    at com.simple.app.MainActivity.onCreate(MainActivity.java:138)
    at android.app.Activity.performCreate(Activity.java:6237)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
    at android.app.ActivityThread.-wrap11(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

Add the below lines to your AndroidManifest.xml

<service android:name="com.google.firebase.components.ComponentDiscoveryService" >
        <meta-data
            android:name="com.google.firebase.components:com.google.firebase.iid.Registrar"
            android:value="com.google.firebase.components.ComponentRegistrar" />

It worked in my case....

Answer 2

java.lang.NoSuchMethodError: No static method getNoBackupFilesDir(Landroid/content/Context;)Ljava/io/File; in class Lcom/google/android/gms/common/util/zzx;

FYI

ASAIK getNoBackupFilesDir is present in android.support.v4.content.ContextCompat.

• Remove support-v4:25.3.1 from your build.gradle dependency section.
• Then Clean-Rebuild and Run.

It will be better if you use Latest version.

android {
    // ...

    compileSdkVersion 26
    buildToolsVersion '26.0.1'

    defaultConfig {
        targetSdkVersion 26
    }

    // ...
 }

Add

repositories {
    maven { url 'https://maven.google.com' }
}

And

dependencies {
    // ...
    compile 'com.android.support:appcompat-v7:26.1.0'
    compile 'com.android.support:support-compat:26.1.0'
    compile 'com.google.firebase:firebase-messaging:11.4.2'
    // ...
}

NOTE

FirebaseInstanceId.getInstance().getToken() Call to retrieve the current token . If the token has not yet been created, null is returned.

Monitoring token generation

As the official guideline about Set up a Firebase cloud messaging client app on Android. indicates:

"The onTokenRefreshcallback fires whenever a new token is generated, so calling getToken in its context ensures that you are accessing a current, available registration token. Make sure you have added the service to your manifest, then call getToken in the context of onTokenRefresh, and log the value (…)"

Example

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

    private static final String TAG = "MyFirebaseIIDService";

    /**
     * Called if InstanceID token is updated. This may occur if the security of
     * the previous token had been compromised. Note that this is called when the InstanceID token
     * is initially generated so this is where you would retrieve the token.
     */
    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + refreshedToken);

        // If you want to send messages to this application instance or
        // manage this apps subscriptions on the server side, send the
        // Instance ID token to your app server.
        sendRegistrationToServer(refreshedToken);
    }

    // ...

}

Answer 3

Try to use the same versions of firebase SDK and support SDK too.

Check dependency tree:

./gradlew :{yourappmodulename}:dependencies --configuration compile

If you check the tree you will see the different versions:

• Firebase: 9.2.0 and 9.8.0
• Support SDK: 25.0.1 and 25.3.1

You can fix it if you update firebase to 9.8.0 and support SDK to 25.3.1.