CODEWITHSUNDEEP
javaandroidandroid-layoutandroid-view
Jim
Jim

Reputation: 4405

How to pass a resource id to a custom view and indicate for which child view to use it?

I have a custom view implemented in Java that is a vertical layout with 4 child views.
I would like to be able to pass a configuration for each child view via a method in the custom view.
Let's assume I just want to pass a different color id per view e.g. for child 1 use R.color.white and for child 2 use R.color.red etc
How could I pass this information to the custom view? The following would work: 

public void configure(int color1, int color2, int color3, int color4)

but the problem with that is that I would prefer a way that the caller of the method indicates which color is for which child (1,2,3,4) instead of passing the colors fixed in the method call

Upvotes: 0

Views: 52

Answers (1)

Ben P.
Ben P.

Reputation: 54194

If you want to be able to allow callers to configure individual children, I recommend exposing individual methods for each child:

public void configureChild1(int color)
public void configureChild2(int color)
...

If you want just a single "dynamic" method, you will have to accept something like a Map from position to color, or a vararg Pair of position and color:

public void configure(Map<Integer, Integer> positionsToColors)
public void configure(Pair<Integer, Integer> ... positionAndColors)

The downside for these is that there's no compile-time way of knowing that the passed-in positions are valid.

Upvotes: 1

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