Android Studio 问题，即使密码和 email 正确，也无法注册。 我没有在我的 firebase 帐户中获取 FCM 令牌

Question

我不知道问题是否来自代码。 注册后，当我尝试登录时，它显示“凭据错误或连接错误，请重试”。 如果密码错误或 email id 错误，则调用该错误。

firebaseAuth.signInWithEmailAndPassword(id,pass).addOnCompleteListener(SignInActivity.this, new OnCompleteListener<AuthResult>() {
    @Override
    public void onComplete(@NonNull Task<AuthResult> task) {
        if(task.isSuccessful())
        {
            String id=editID.getEditText().getText().toString().trim()+"@gmail.com";
            db.collection("User").whereEqualTo("email",id).get().addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
                @Override
                public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
                    User obj=new User();
                    for(QueryDocumentSnapshot doc:queryDocumentSnapshots)
                        obj=doc.toObject(User.class);
                    FirebaseMessaging.getInstance().getToken().addOnCompleteListener(new OnCompleteListener<String>() {
                        @Override
                        public void onComplete(@NonNull com.google.android.gms.tasks.Task<String> task) {
                            try {
                                String token = task.getResult();
                                Log.e("DeviceToken = ",token);

                            }catch (Exception e){
                                e.printStackTrace();
                            }

                        }
                    });


                    db.document("User/"+firebaseAuth.getCurrentUser().getEmail()).update("fcmToken",SharedPref.getInstance(getApplicationContext()).getToken())
                            .addOnCompleteListener(new OnCompleteListener<Void>() {
                                @Override
                                public void onComplete(@NonNull Task<Void> task) {

                                    if(task.isSuccessful())
                                    {
                                        Toast.makeText(SignInActivity.this, "Registered for Notifications Successfully !", Toast.LENGTH_SHORT).show();
                                    }
                                    else
                                    {
                                        Toast.makeText(SignInActivity.this, "Registration for Notifications Failed !\nPlease Sign in Again to Retry", Toast.LENGTH_SHORT).show();
                                    }

                                }
                            });

Answer 1

如果Task失败，它会包含一个异常以及失败原因的附加信息。 您应该记录该异常：

db.document("User/"+firebaseAuth.getCurrentUser().getEmail()).update("fcmToken",SharedPref.getInstance(getApplicationContext()).getToken())
  .addOnCompleteListener(new OnCompleteListener<Void>() {
    @Override
    public void onComplete(@NonNull Task<Void> task) {

        if(task.isSuccessful())
        {
            Toast.makeText(SignInActivity.this, "Registered for Notifications Successfully !", Toast.LENGTH_SHORT).show();
        }
        else
        {
            // 👇
            Log.e("Auth", "Registration for Notifications Failed", task.getException());
            Toast.makeText(SignInActivity.this, "Registration for Notifications Failed !\nPlease Sign in Again to Retry", Toast.LENGTH_SHORT).show();
        }    
    }
});

一旦你得到异常，搜索错误信息，看看其他人之前是否处理过这个问题。