LayerDrawable layers padding and rounded corner parts not transparent

Question

I'm trying to create a CustomButton dynamically for java code with 10dp padding and 10dp rounded corners. I wrote the following:

public class CustomButton extends Button {

    private GradientDrawable gd;
    private ShapeDrawable sd;
    private LayerDrawable ld;
    private StateListDrawable sld;

    public CustomButton(Context context) {

        super(context);

        gd = new GradientDrawable(GradientDrawable.Orientation.TL_BR, new int[]{Color.parseColor("#39D100"), Color.parseColor("#369212")});
        gd.setCornerRadius(10);

        sd = new PaintDrawable();
        sd.setPadding(10, 10, 10, 10);

        ld = new LayerDrawable( new Drawable[]{sd, gd} );

        sld = new StateListDrawable();
        sld.addState(new int[]{0,1}, ld);

        setBackgroundDrawable(sld);

    }

}

If I add only the GradientDrawable or only the ShapeDrawable to StateListDrawable it works correctly, but if I put both into the LayerDrawable the padding and corner parts will have a black background and not transparent as expected.

ScreenShot:

To fix it you gotta draw your own gradient using a RoundRectShape with incrementing insets and alpha values — Marcin D, Feb 26 '20 at 19:07

score 1 · Answer 1 · answered Mar 22 '12 at 19:44

1

To remove black background, clear the paint color with

sd.getPaint().setColor(0);

answered Mar 22 '12 at 19:44

Ruslan Yanchyshyn

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score 0 · Answer 2 · edited May 23 '17 at 12:13

0

I think this can be achived with a custom selector for your button, rather than writing up a whole class. Take a look at this question: Standard Android Button with a different color

edited May 23 '17 at 12:13

Community

1
1

answered Feb 14 '12 at 13:51

Drejc

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Thanks! That was my first idea, but I'm not sure if I can change the gradient from java code. – Paldom Feb 14 '12 at 14:22
Sure you can: – Drejc Feb 14 '12 at 14:48
I mean dynamically without xml. I would like to create many different colored gradient buttons with same other parameters. – Paldom Feb 14 '12 at 17:09

LayerDrawable layers padding and rounded corner parts not transparent

2 Answers2