在Android中使用Firebase进行Facebook身份验证

Question

我正在尝试使用Firebase登录到Facebook，然后获取姓名，电子邮件，个人资料图片。

一切正常，直到单击登录按钮，然后弹出Facebook帐户窗口。之后，当我通过单击“继续使用xxxxxx”选择一个帐户，并且<应用程序已停止>时。

当我重新启动我的应用程序时，我发现身份验证已完成，没有错误

任何帮助将不胜感激。

这是我的authfacebook.java：

facebook.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            LoginManager.getInstance().logInWithReadPermissions(PhoneAuthActivity.this, Arrays.asList("email", "public_profile"));
            LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    Log.d(TAG, "facebook:onSuccess:" + loginResult);
                    handleFacebookAccessToken(loginResult.getAccessToken());
                    Toast.makeText(PhoneAuthActivity.this, "success", Toast.LENGTH_SHORT).show();
                    finish();
                    startActivity(new Intent(PhoneAuthActivity.this, nav_activity.class));
                }

                @Override
                public void onCancel() {
                    Log.d(TAG, "facebook:onCancel");
                    Toast.makeText(PhoneAuthActivity.this, "cancel", Toast.LENGTH_SHORT).show();
                }

                @Override
                public void onError(FacebookException error) {
                    Log.d(TAG, "facebook:onError", error);
                    Toast.makeText(PhoneAuthActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
                }
            });
        }
    });

private void handleFacebookAccessToken(AccessToken token) {
    netCheckin();
    Log.d(TAG, "handleFacebookAccessToken:" + token);
    progressDialog = ProgressDialog.show(this, "Loading...", "Please wait Posts is Loading...");
    AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
    mAuth.signInWithCredential(credential).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        //Sign in success, update UI with the signed-in user's information
                          Log.d(TAG, "signInWithCredential:success");
                        progressDialog.dismiss();
                        mAuth.addAuthStateListener(mAuthListener);

                    } else {
                        // If sign in fails, display a message to the user.
                        Log.w(TAG, "signInWithCredential:failure", task.getException());
                        Toast.makeText(PhoneAuthActivity.this, "Authentication failed. Please Use another Account.", Toast.LENGTH_SHORT).show();
                        progressDialog.dismiss();
                    }

                    // ...                }
                }
 });
}