使用视图模型和实时数据的双向绑定 - 错误“找不到符号类 ActivityLoginBindingImpl”

如何解决使用视图模型和实时数据的双向绑定 - 错误“找不到符号类 ActivityLoginBindingImpl”

我正在尝试使用实时数据和视图模型实现数据绑定。

执行后出现错误：

找不到符号类 ActivityLoginBindingImpl

我已经尝试过无效缓存/重启，但没有帮助。

当从用户名和密码的 xml 代码中的 EditText 中清除双向绑定时，此错误将被消除。

请帮助我知道我在做什么错。我提到了下面的代码：

public class Login extends AppCompatActivity {

private ActivityLoginBinding binding;
private LoginViewModel loginViewModel;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    binding = DataBindingUtil.setContentView(this,R.layout.activity_login);
    loginViewModel = new ViewModelProvider(this).get(LoginViewModel.class);
    binding.setLoginViewModel(loginViewModel);
    binding.setLifecycleOwner(this);

    TextView tvRegister = findViewById(R.id.tvRegister);
    TextView tvForgotPassword = findViewById(R.id.tvForgotPassword);

    tvRegister.setOnClickListener(view ->{
        startActivity(new Intent(this,Register.class));
    });

    tvForgotPassword.setOnClickListener(view ->{
        startActivity(new Intent(this,ForgotPassword.class));
    });

    init();
}

private void init(){
    loginViewModel.getLoginData().observe(this,loginData ->{
        Toast.makeText(getApplicationContext(),loginData.getUsername()+" "+
                      loginData.getPassword(),Toast.LENGTH_SHORT).show();
    });

    loginViewModel.gertErrorMsg().observe(this,errorMsg->{
        Toast.makeText(getApplicationContext(),errorMsg,Toast.LENGTH_SHORT).show();
    });
}
}

public class LoginModel {

private String username;
private String password;

public LoginModel() {}

public LoginModel(String username,String password) {
    this.username = username;
    this.password = password;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}
}


public class LoginViewModel extends ViewModel {

private MutableLiveData<LoginModel> loginData = new MutableLiveData<>();
private MutableLiveData<String> userName = new MutableLiveData<>();
private MutableLiveData<String> userPassword = new MutableLiveData<>();
private MutableLiveData<String> errorMsg = new MutableLiveData<>();

public LiveData<String> getUserName(){
    return userName;
}

public LiveData<String> getUserPassword(){
    return userPassword;
}

public LiveData<LoginModel> getLoginData(){
    return loginData;
}

public LiveData<String> gertErrorMsg(){
    return errorMsg;
}

public void validateCredentials(){
    if((userName.getValue() == null || userName.getValue().isEmpty()) &&
      (userPassword.getValue() == null || userPassword.getValue().isEmpty())){
        errorMsg.postValue("Empty Fields");
    }else{
        LoginModel loginUserData = new LoginModel(userName.getValue(),userPassword.getValue());
        loginData.postValue(loginUserData);
    }
}
}

<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">

<data>
    <variable
        name="loginViewModel"
        type="com.medrechospital.model.login.signup.LoginViewModel" />
</data>

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".login.signup.Login">

    <TextView
        android:id="@+id/tvSkip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:text="@string/skip"
        style="@style/LoginSignUpTextView"/>

    <ImageView
        android:id="@+id/logo"
        android:layout_width="180dp"
        android:layout_height="180dp"
        android:src="@drawable/short_logo"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toTopOf="@id/layoutLoginDetail"
        android:contentDescription="@null" />

    <LinearLayout
        android:id="@+id/layoutLoginDetail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/logo"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginStart="@dimen/normal_margin"
        android:layout_marginEnd="@dimen/normal_margin"
        android:orientation="vertical">

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/username"
            android:text="@={loginViewModel.userName}"
            style="@style/LoginSignUpEditText"/>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/password"
            android:text="@={loginViewModel.userPassword}"
            style="@style/LoginSignUpEditText"
            android:layout_marginTop="@dimen/big_margin"/>

        <TextView
            android:id="@+id/tvForgotPassword"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/forgot_password"
            android:layout_gravity="end"
            style="@style/LoginSignUpTextView"/>

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/login"
            android:textColor="@color/white"
            android:textSize="@dimen/big_text_size"
            android:layout_marginTop="@dimen/big_margin"
            android:fontFamily="@font/karla_bold"
            android:background="@drawable/blue_button_bg"/>

        <TextView
            android:id="@+id/tvRegister"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/new_user"
            android:layout_gravity="center"
            style="@style/LoginSignUpTextView"
            android:layout_marginTop="@dimen/normal_margin"/>

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>
</layout>