Add margins to divider in RecyclerView

Question

i am building an android app which is using RecyclerView. I want to add dividers to RecyclerView, which I did using this code:

Divi         


        

Answer 1

I think the most straightforward solution is to use the setDrawable method on the Decoration object and pass it an inset drawable with the inset values you want for the margins. Like so:

int[] ATTRS = new int[]{android.R.attr.listDivider};

TypedArray a = context.obtainStyledAttributes(ATTRS);
Drawable divider = a.getDrawable(0);
int inset = getResources().getDimensionPixelSize(R.dimen.your_margin_value);
InsetDrawable insetDivider = new InsetDrawable(divider, inset, 0, inset, 0);
a.recycle();

DividerItemDecoration itemDecoration = new DividerItemDecoration(context, DividerItemDecoration.VERTICAL);
itemDecoration.setDrawable(insetDivider);
recyclerView.addItemDecoration(itemDecoration);

Answer 2

Same like @Vivek answer but in Kotlin and different params

class SimpleItemDecorator : RecyclerView.ItemDecoration {

    private var top_bottom: Int = 0
    private var left_right: Int = 0

    /**
     * @param top_bottom for top and bottom margin
     * @param left_right for left and right margin
     */
    constructor(top_bottom: Int, left_right: Int = 0) {
        this.top_bottom = top_bottom
        this.left_right = left_right
    }

    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
        super.getItemOffsets(outRect, view, parent, state)
        outRect.bottom = top_bottom
        outRect.top = top_bottom
        outRect.right = left_right
        outRect.left = left_right
    }
}