如何动态地将可绘制资源设置为ImageView？

Question

I use function drawCircle(int diameter) to return ShapeDrawable object, which is an OvalShape. Then I use ImageView.setImageDrawable() to set the OvalShape. But the ImageViews are still empty. How to do it correctly?

Function drawCircle() :

public ShapeDrawable drawCircle (int diameter) {
        OvalShape ovalShape = new OvalShape();
        ShapeDrawable drawable = new ShapeDrawable(ovalShape);
        drawable.getPaint().setColor(getResources().getColor(R.color.textColorHint));
        drawable.getPaint().setStyle(Paint.Style.FILL_AND_STROKE);
        drawable.getPaint().setStrokeWidth((float)2);
        drawable.setBounds(0 ,0, diameter, diameter);

        return drawable;
    }

Set ImageView :

one_img.setImageDrawable(drawCircle(selector_one_diameter));
two_img.setImageDrawable(drawCircle(selector_two_diameter));

Above all, I tried using .xml file to describe oval shapes. But since values in dimens.xml cannot be re-written in Java code, I can't dynamically change the size of oval shapes. It couldn't be better if you can suggest another way!

Answer 1

It could be due to you have not set widht, height to your drawable. You can set a default size using below code.

drawable.setIntrinsicWidth(); 
drawable.setIntrinsicHeight();