Hi, I have a doubt, How do we call an interface me...

# android

[sidharthanil]

Hi, I have a doubt, How do we call an interface method in fragment from parent activity in kotlin. When I try to do that it says the interface object must be initialised

[gildor]

Please share code example

[sidharthanil]

I created an interface in mainactivity

interface onProductsChangedListner{
        fun updateProductList(products:List<Product>)
}

and implemented the same in a fragment

class GalleryFragment: Fragment(),MainActivity.onProductsChangedListner {
    override fun updateProductList(products: List<Product>) {
        this.products = products
        galleryAdapter.changeDataset(products)
    }

How do i call the interface methods from main activity?

[sidharthanil]

When i try to create an object of interface class, kotlin says it must be initialised. It is not required in java right?. So what should i do?

[gildor]

How do you call method from activity?

[sidharthanil]

I tried doing this

var productChangedListner: onProductsChangedListner
productChangedListner.updateProductList(products)

[sidharthanil]

but it says productChangedListner must be initialised

[gildor]

But looks like you try to access the same property that initializing (also, where is equals between type and assignment)

[gildor]

Where is fragment in this assignment?

[sidharthanil]

Im implementing the interface in fragment

[gildor]

And? Maybe could you just post screenshot from your IDE with error message and your code. Because your code snippet above is just syntactically wrong

[sidharthanil]

I figured it out. I guess it was syntactically wrong. Thank you for pointingthat out