i have a problem with parameter generic interface. I have 2 different interface and i need to pass the interface to constructor but the constructor gives warning.

public interface FormFragmentContract {
interface View extends BaseView {
void updateWorkshopUI(int icon);
void showRemoveFavoriteDialog(String wsId, String name);
void favoriteOnClick();
void showSnackbar();
}
}

public interface WorkshopListContract {
interface View extends BaseView {
void initializeMap();
void onSuccessInitMap();

void favoriteOnClick();
void showSnackBar(String message);
}
}


and the constructor code this gives warning like below

workshopAdapter = new WorkshopAdapter(mActivity, workshopList, this); <- this give warning mismatch type

public WorkshopAdapter(Context context, List<Workshop> workshops, //NEED TO BE GENERIC) {
this.context = context;
this.workshops = workshops;
}


How to make both of my interface generic so it can take both interfaces as parameter ?

EDIT : because both interface contain favoriteOnClick() , If i pass the FormFragmentContract into constructor i can use the favoriteOnClick() from FormFragment and vice versa with WorkshopListContract if i pass that to the constructor as well

FormFragmentContract

WorkshopListContract

1 Answer
1

You'd have to declare an upper interface which contains the method favoriteOnClick():

interface

favoriteOnClick()

public interface Contract { // name it as you wish
void favoriteOnClick();
}


And then extend both your interfaces from said created:

interfaces

public interface FormFragmentContract extends Contract{
// methods
}

public interface WorkshopListContract extends Contract{
// methods
}


And then accept the Contract interface in your constructor:

Contract

public WorkShopAdapter(Context context, List<Workshop> workshops, Contract contract) {
this.context = context;
this.workshops = workshops;

// call it here
contract.favoriteOnClick();
}


No need for generics

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