How to create android shape background programmatically?

Question

How to create this shape programmatically?

Answer 1

If what you want is just a simple rounded rectangle, cut the long story short.

    float r=8;
    ShapeDrawable shape = new ShapeDrawable (new RoundRectShape(new float[] { r, r, r, r, r, r, r, r },null,null));
    shape.getPaint().setColor(Color.RED);
    view.setBackground(shape);

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• What is the RoundRectShape ?

RoundRectShape specifies an outer (round) rect and an optional inner (round) rect.

// RoundRectShape constructor

   RoundRectShape(float[] outerRadii,
                     RectF inset,
                   float[] innerRadii);

• outerRadii is an array of 8 radius values, for the outer roundrect. The first two floats are for the top-left corner (remaining pairs correspond clockwise). For no rounded corners on the outer rectangle, just pass null.

For example:

• inset is a RectF that specifies the distance from the inner rect to each side of the outer rect. For no inner, pass null.

• innerRadii is an array of 8 radius values, for the inner roundrect. The first two floats are for the top-left corner (remaining pairs correspond clockwise). For no rounded corners on the inner rectangle, pass null. If inset parameter is null, this parameter is ignored.

For example:

ShapeDrawable shape = new ShapeDrawable(
        new RoundRectShape(
            new float[]{20, 20, 20, 20, 20, 20, 20, 20},
            new RectF(10, 20, 10, 20),
            new float[]{40, 40, 40, 40, 40, 40, 40, 40}));