带单选按钮的Android双向数据绑定

我的课：

public class ReceiveDataContainer extends BaSEObservable {
    private Boolean isShopReceiveMethodChosen;

    @Bindable
    public Boolean isShopReceiveMethodChosen() {
        return isShopReceiveMethodChosen;
    }

    public void setShopReceiveMethodChosen(Boolean isShopReceiveMethodChosen) {
        this.isShopReceiveMethodChosen = isShopReceiveMethodChosen;
        notifyPropertyChanged(BR.shopReceiveMethodChosen);
    }
}

XML：

<RadioGroup
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="16dp"
            android:layout_marginStart="16dp"
            android:layout_marginTop="16dp"
            android:orientation="vertical"
            app:layout_consTraintLeft_toLeftOf="parent"
            app:layout_consTrain@R_450_10296@ht_toRightOf="parent"
            app:layout_consTraintTop_toBottomOf="@+id/inputLayoutPhonenumber">

            <RadioButton
                android:id="@+id/radio_receive_in_store"
                android:text="@String/radio_button_receive_in_store"
                android:checked="@={receiveDataContainer.shopReceiveMethodChosen}"
                style="@style/CartReceptionRadioButton" />

            <RadioButton
                android:id="@+id/radio_send_to_home"
                android:text="@String/radio_button_send_to_home"
                style="@style/CartReceptionRadioButton" />

        </RadioGroup>

并且生成的代码标记为无效：

// Inverse Binding Event Handlers
private android.databinding.InverseBindingListener radioReceiveInStorea = new android.databinding.InverseBindingListener() {
    @Override
    public void onChange() {
        // Inverse of receiveDataContainer.shopReceiveMethodChosen
        //         is receiveDataContainer.setShopReceiveMethodChosen((Boolean) callBACkArg_0)
        Boolean callBACkArg_0 = radioReceiveInStore.ischecked();
        // localize variables for thread safety
        // receiveDataContainer.shopReceiveMethodChosen
        Boolean shopReceiveMethodCho = false;
        // receiveDataContainer
        com.abastra.home_cook.catalogue.data.models.ReceiveDataContainer receiveDataContainer = mReceiveDataContaine;
        // receiveDataContainer != null
        Boolean receiveDataContainer = false;



        receiveDataContainer = (receiveDataContainer) != (null);
        if (receiveDataContainer) {




            receiveDataContainer.setShopReceiveMethodChosen((Boolean) (callBACkArg_0));
        }
    }
};

值得一提的是,当我删除“=”符号时,代码会编译.

请帮我…