public class LoginActivity extends AppCompatActivity {
    private EditText emailET, passwordET;
    private Button loginBtn, signUpBtn;
    private FirebaseAuth auth;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        emailET = findViewById(R.id.emailET);
        passwordET = findViewById(R.id.passwordET);
        loginBtn = findViewById(R.id.loginBtn);
        signUpBtn = findViewById(R.id.signUpBtn);
        auth = FirebaseAuth.getInstance();
        loginBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = emailET.getText().toString();
                String password = passwordET.getText().toString();
                auth.signInWithEmailAndPassword(email,password).addOnSuccessListener(new OnSuccessListener<AuthResult>() {
                    @Override
                    public void onSuccess(AuthResult authResult) {
                        FirebaseUser user = authResult.getUser();
                        Toast.makeText(getApplicationContext(),"Logged in, "+user.getEmail(),Toast.LENGTH_SHORT).show();
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
        signUpBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String email = emailET.getText().toString();
                String password = passwordET.getText().toString();
                auth.createUserWithEmailAndPassword(email,password).addOnSuccessListener(new OnSuccessListener<AuthResult>() {
                    @Override
                    public void onSuccess(AuthResult authResult) {
                        FirebaseUser user = authResult.getUser();
                        Toast.makeText(getApplicationContext(),"Signed up, "+user.getEmail(),Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }
}