如何解决碎片错误

Question

下面是我的代码。

public class Login extends AppCompatActivity {
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        getSupportFragmentManager().beginTransaction().replace(R.id.loginFrame, new LoginFragment()).commit();

    }
}

  public class LoginFragment extends Fragment {
        EditText emailEt,passwordEt;
        String email,password;
        Button login,signup;
        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            View rootview = super.onCreateView(inflater, container, savedInstanceState);

            emailEt=(EditText)rootview.findViewById(R.id.emailEt);
            passwordEt=(EditText)rootview.findViewById(R.id.passEt);
            login=(Button)rootview.findViewById(R.id.loginBtn);
            signup=(Button)rootview.findViewById(R.id.signupBtn);

            login.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    email=emailEt.getText().toString();
                    password=passwordEt.getText().toString();

                    if(email.length()==0){
                        emailEt.requestFocus();
                        emailEt.setError("FIELD CANNOT BE EMPTY");
                    }else if(password.length()==0){
                        passwordEt.requestFocus();
                        passwordEt.setError("FIELD CANNOT BE EMPTY");
                    }else{
                        Toast.makeText(getActivity(),"Validation Done",Toast.LENGTH_SHORT).show();
                        Intent in=new Intent(getActivity(),Options_class.class);
                        startActivity(in);
                    }
                }
            });

            signup.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent=new Intent(getActivity(),Signup.class);
                    startActivity(intent);
                }
            });
            return rootview;
        }
    }

有没有人能帮我解决这个mainActivity和片段代码中的logcat的问题。

Answer 1

修改此行

View rootview = super.onCreateView(inflater, container, savedInstanceState);

进入这个

   View rootview = inflater.inflate(R.layout.fragmentlayout, container, false);