如何解决AuthStateListener问题 [英] How do I fix this AuthStateListener issue

问题描述

我有两个活动:SignIn和SignUp.他们每个人都有一个AuthStateListener.

I have two activities: SignIn and SignUp. Each of them has an AuthStateListener.

问题在于，当应用程序处于SignUp活动中并且身份验证状态发生更改时，SignIn活动中的AuthStateListener会被调用(当我登录两个侦听器时都发现了此问题).

The problem is that AuthStateListener from SignIn activity gets called when app is in SignUp activity and authentication state is changed (Found this when I logged in both listener).

SignIn的onCreate方法:

onCreate method of SignIn :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sign_in);

    mAuth = FirebaseAuth.getInstance();

    mAuth.addAuthStateListener(new FirebaseAuth.AuthStateListener() {
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
            progressBar.setVisibility(View.INVISIBLE);
            if (mAuth.getCurrentUser() != null && isEmailVerified()) {
                Toast.makeText(SignIn.this, "Signed In", Toast.LENGTH_SHORT).show();
                finish();
                startActivity(new Intent(SignIn.this, UserProfile.class));
            } else if (mAuth.getCurrentUser() != null) {
                mAuth.getCurrentUser().sendEmailVerification().addOnCompleteListener(new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        Toast.makeText(SignIn.this, "Verification email sent You can sign in once your account is verified.", Toast.LENGTH_SHORT).show();
                        mAuth.signOut();
                    }
                });
            }
        }
    });

   ........
}

SignUp的onCreate方法:

onCreate method of SignUp :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sign_up);

    mAuth = FirebaseAuth.getInstance();

    .....

    mAuth.addAuthStateListener(new FirebaseAuth.AuthStateListener() {
        @Override
        public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
            if (mAuth.getCurrentUser() != null) {
                verifyEmail();
            }
        }
    });
}

该如何解决?

推荐答案

如果您不想再调用AuthStateListener，则需要通过调用

If you don't want an AuthStateListener to be called anymore, you need to unregister it by calling removeAuthStateListener.

这意味着您需要跟踪侦听器，所以:

This means you need to keep track of the listener, so:

listener = new FirebaseAuth.AuthStateListener() {
  ...
}
mAuth.addAuthStateListener(listener);

通常会在与注册它们相反的生命周期事件中执行此操作.对于您的情况，我建议将addAuthStateListener移到onStart上，然后使用

在onStop或onPause中注销它.

You'd typically do that in the opposite lifecycle event of where you register them. In your case I'd recommend moving the addAuthStateListener on onStart and then unregister it in onStop or in onPause with

mAuth.removeAuthStateListener(listener)

这篇关于如何解决AuthStateListener问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！