java如何防止注册后重定向到其他活动？

Question

此代码在public void onSuccess（void aVoid）之前工作正常，但在执行之后，活动立即重定向到上一个活动，而不是停留在其上，然后出现toast消息

我希望它在注册用户后保留在活动中

mFireBaseAuth=FirebaseAuth。getInstance（）； mfirebaseDatabase=FirebaseDatabase。getInstance（）

    mFireBaseAuth.createUserWithEmailAndPassword(e_mail, password).addOnCompleteListener(StudentSignUp.this, new OnCompleteListener<AuthResult>()
    {

        @Override
        public void onComplete(@NonNull Task<AuthResult> task)
        {

            if(!task.isSuccessful())
            {

                Toast.makeText(StudentSignUp.this, "Please check your network or try again using different E-mail.", Toast.LENGTH_SHORT).show();
                //loadingBar.dismiss();

            }

            else
            {

                StudentDetails studentCredentials = new StudentDetails( studentId, name, e_mail, password );
                String uId = task.getResult().getUser().getUid();
                mfirebaseDatabase.getReference().child("Student").child(uId).setValue(studentCredentials).addOnSuccessListener(new OnSuccessListener<Void>()
                {

                    @Override
                    public void onSuccess(Void aVoid)
                    {

                        Toast.makeText(StudentSignUp.this, "Your Student is Registered & account has been created.", Toast.LENGTH_SHORT).show();
                        //loadingBar.dismiss();

                    }

                });

            }

        }

    });

}

Answer 1

为什么需要在onCompleteListener中传递上下文

代码应该是这样的：

  mFireBaseAuth.createUserWithEmailAndPassword(e_mail, password).addOnCompleteListener(new OnCompleteListener<AuthResult>()
{

    @Override
    public void onComplete(@NonNull Task<AuthResult> task)
    {

        if(!task.isSuccessful())
        {

            Toast.makeText(StudentSignUp.this, "Please check your network or try again using different E-mail.", Toast.LENGTH_SHORT).show();
            //loadingBar.dismiss();

        }

        else
        {

            StudentDetails studentCredentials = new StudentDetails( studentId, name, e_mail, password );
            String uId = task.getResult().getUser().getUid();
            mfirebaseDatabase.getReference().child("Student").child(uId).setValue(studentCredentials).addOnSuccessListener(new OnSuccessListener<Void>()
            {

                @Override
                public void onSuccess(Void aVoid)
                {

                    Toast.makeText(StudentSignUp.this, "Your Student is Registered & account has been created.", Toast.LENGTH_SHORT).show();
                    //loadingBar.dismiss();

                }

            });

        }

    }

});

与使用onCompleteListener和if（！task.issusccessful（））不同，您还可以使用onSuccessListener，有时我们会忘记检查（！task.issusccessful（）），所以最好使用onSuccessListener😀

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