使用 onCompleteListener 进行 Firebase 身份验证不起作用

Question

I am trying to implement a basic android authentication system with Firebase. The following is my code:

Toast.makeText(MainActivity.this, "BEFORE ON-COMPLETE", Toast.LENGTH_SHORT).show();  //this shows up
    mAuth.signInWithEmailAndPassword(emailInputted, passInputted).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
            Toast.makeText(MainActivity.this, "in OnComplete", Toast.LENGTH_SHORT).show(); //this does not show up
            if(task.isSuccessful()){
                Intent i = new Intent(MainActivity.this, Dashboard.class);
                i.putExtra("EMAIL", emailInputted);
                Toast.makeText(MainActivity.this, "Login Successful", Toast.LENGTH_SHORT).show();
                startActivity(i);
            } else {
                Toast.makeText(MainActivity.this, "Please check email/password", Toast.LENGTH_SHORT).show();
            }
        }
    });
    Toast.makeText(MainActivity.this, "after OnComplete", Toast.LENGTH_SHORT).show(); //this shows up

I took this code from the official Firebase docs , but for some reason it is not working. The onComplete method is not being called for some reason. I can see the "before on-Complete" and "after on-complete" toasts, but not the "in OnComplete" one. I have added the users in my authentication table in the firebase console, and I am positive that I am entering the correct password.

After using the debugger, I saw that my code just skips over the onComplete() method, and does not even get to the isSuccessful() method. How do I fix this?

Thanks in advance!

Answer 1

Follow this, I hop you will get your answer.

lBut = findViewById(R.id.log_btn);
        lBut.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String a = usrn.getText().toString().trim();
                String b = pswd.getText().toString().trim();

                if (TextUtils.isEmpty(a) && TextUtils.isEmpty(b)) {
                    usrn.setError("Empty Email !!");
                    pswd.setError("Empty Password !!");

                    lBut.setClickable(false);
                } else {
                    lBut.setClickable(true);
                    mAuth.signInWithEmailAndPassword(a, b).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
                        @SuppressLint("ShowToast")
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (task.isSuccessful()) {
                                Toast.makeText(getApplicationContext(), "Successfully Login!!", Toast.LENGTH_SHORT).show();
                                Intent i = new Intent(getApplicationContext(), HomeP.class);
                                ProgressBar prb = findViewById(R.id.progressBar);
                                prb.setVisibility(View.VISIBLE);
                                startActivity(i);
                                finish();
                            } else
                                Toast.makeText(getApplicationContext(), "Check Error And Try Again!!", Toast.LENGTH_SHORT).show();
                        }
                    });

                }
            }
        });

This is the Event on the Login Button, you have more doubt then reply me.

Answer 2

So it fixed itself after I restarted my computer. No code changes. Maybe Android Studio was being wacky.