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Start your free trialTarek M.Tolba
Courses Plus Student 3,613 Pointsinterface (Fragements)
Can someone please explain what does this line of code do or why did we use it?
onRecipeSelectedInterface listener = (onRecipeSelectedInterface) getActivity();
1 Answer
Seth Kroger
56,413 PointsWe need to get a handle on the listener interface so we can call it when needed. Since the interface is implemented in the Activity, we use getActivity()
to get a reference to it. However the value getActivity() returns is not of type onRecipeSelectedInterface. Its type is a general Activity, not the specific MainActivity (or whatever the activity class is named here) that implements onRecipeSelectedInterface. So we need to explicitly downcast it with the (onRecipeSelectedInterface)
part to make the types match.