E/StorageUtil: error getting token java.util.concurrent.ExecutionException: com.google.android.gms.internal.zzand: Please sign in before trying to get a token.

解决方法@H_403_9@

我认为您在上传文件之前没有签名.在启动器活动的onCreate()中,尝试此代码

FirebaseAuth mAuth = FirebaseAuth.getInstance();

然后在onStart()中,

FirebaseUser user = mAuth.getCurrentUser();
if (user != null) {
  // do your stuff
} else {
  signInAnonymously();
}

signInAnonymously()

private void signInAnonymously() {
    mAuth.signInAnonymously().addOnSuccessListener(this,new  OnSuccessListener<AuthResult>() {
            @Override
            public void onSuccess(AuthResult authResult) {
                // do your stuff
            }
        })
        .addOnFailureListener(this,new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception exception) {
                Log.e(TAG,"signInAnonymously:FAILURE",exception);
            }
        });
}

这可以解决您的问题