Flutter Firebase phone auth not working on Android

Question

I'm trying to use the firebase phone verification login, but it's not working. The code is not sent. I've tried to use "keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android" to add sha-1 and sha-256 keys (I tried other methods as well), but still not worked. I tried to enable android device verification API, but nothing is working. I don't know what more I can do, I've tried everything.

Here's the code:

      Future<void> _login() async {
    final _firebaseAuth = FirebaseAuth.instance;
    print('trying to send code');
    _firebaseAuth.verifyPhoneNumber(
      phoneNumber: '<myphonenumberhere>',
      verificationCompleted: (phoneAuthCredential) {
        print('verification completed');
      },
      verificationFailed: (exception) {
        print('verification failed');
      },
      codeSent: (verId, forceResToken) {
        print('code sent');
      },
      codeAutoRetrievalTimeout: (verId) {
        print('auto retieval timeouted');
      },
    );
  }

    I/flutter ( 5839): trying to send code
E/zzbf    ( 5839): SafetyNet Attestation fails basic integrity.
I/Timeline( 5839): Timeline: Activity_launch_request time:94668823 intent:Intent { act=com.google.firebase.auth.internal.ACTION_SHOW_RECAPTCHA pkg=com.example.test_phone_auth cmp=com.example.test_phone_auth/com.google.firebase.auth.internal.RecaptchaActivity (has extras) }
W/ActivityThread( 5839): handleWindowVisibility: no activity for token android.os.BinderProxy@7547327
W/test_phone_aut( 5839): Accessing hidden field Ljava/nio/Buffer;->address:J (light greylist, reflection)
W/zzdk    ( 5839): keyset not found, will generate a new one
W/zzdk    ( 5839): java.io.FileNotFoundException: can't read keyset; the pref value GenericIdpKeyset does not exist
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzdo.zzc(com.google.firebase:firebase-auth@@20.0.1:10)
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzdo.zzb(com.google.firebase:firebase-auth@@20.0.1:1)
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzat.zzi(com.google.firebase:firebase-auth@@20.0.1:1)
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzdj.zzi(com.google.firebase:firebase-auth@@20.0.1:1)
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzdj.zzd(com.google.firebase:firebase-auth@@20.0.1:2)
W/zzdk    ( 5839):  at com.google.firebase.auth.internal.zzk.<init>(com.google.firebase:firebase-auth@@20.0.1:7)
W/zzdk    ( 5839):  at com.google.firebase.auth.internal.zzk.zza(com.google.firebase:firebase-auth@@20.0.1:3)
W/zzdk    ( 5839):  at com.google.firebase.auth.internal.RecaptchaActivity.zzd(com.google.firebase:firebase-auth@@20.0.1:9)
W/zzdk    ( 5839):  at com.google.android.gms.internal.firebase-auth-api.zzth.<init>(com.google.firebase:firebase-auth@@20.0.1:13)
W/zzdk    ( 5839):  at com.google.firebase.auth.internal.RecaptchaActivity.onResume(com.google.firebase:firebase-auth@@20.0.1:43)
W/zzdk    ( 5839):  at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1413)
W/zzdk    ( 5839):  at android.app.Activity.performResume(Activity.java:7400)
W/zzdk    ( 5839):  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3820)
W/zzdk    ( 5839):  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3860)
W/zzdk    ( 5839):  at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:51)
W/zzdk    ( 5839):  at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:145)
W/zzdk    ( 5839):  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:70)
W/zzdk    ( 5839):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1831)
W/zzdk    ( 5839):  at android.os.Handler.dispatchMessage(Handler.java:106)
W/zzdk    ( 5839):  at android.os.Looper.loop(Looper.java:201)
W/zzdk    ( 5839):  at android.app.ActivityThread.main(ActivityThread.java:6810)
W/zzdk    ( 5839):  at java.lang.reflect.Method.invoke(Native Method)
W/zzdk    ( 5839):  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
W/zzdk    ( 5839):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
I/zzjy    ( 5839): Provider GmsCore_OpenSSL not available
W/Activity( 5839): Slow Operation: Activity com.example.test_phone_auth/com.google.firebase.auth.internal.RecaptchaActivity onResume took 219ms
I/DpmTcmClient( 5839): RegisterTcmMonitor from: com.android.okhttp.TcmIdleTimerMonitor
W/System  ( 5839): Ignoring header X-Firebase-Locale because its value was null.

Answer 1

If you're testing it on an emulator, you need to include the dependency androidx.browser:browser to make it works.

The SHA256 key and android device verification API is for a real device to pass Safetynet check.

Check out the Enable app verification section and my response in the Flutterfire issue thread.