resize vectordrawable icon programmatically

Question

I am showing some VectorDrawable icon dynamically in my android project. However, I couldn't scale the icons in java layer using the below code:

VectorDrawable jDrawable = (VectorDrawable) getContext().getDrawable(nResourceID);

// resize the icon
jDrawable.setBounds(30, 30, 30, 30);

// set the icon in the button view
button.setCompoundDrawablesRelativeWithIntrinsicBounds(jDrawable, null, null, null);

Note: Android how to resize (scale) an xml vector icon programmatically the answer does not solve my problem.

Answer 1

jDrawable.setBounds doesn't work because of a bug in android.

One way to overcome the bug is to convert VectorDrawable to Bitmap and display it.

Bitmap bitmap = Bitmap.createBitmap(jDrawable.getIntrinsicWidth(), jDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
jDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
jDrawable.draw(canvas);

Then use this bitmap to display something like below. First convert it to BitmapDrawable

BitmapDrawable bd = new BitmapDrawable(bitmap);
buttonsetCompoundDrawablesRelativeWithIntrinsicBounds(bd, null, null, null);

Also in your helper function you can return bd.

To use it on pre-23 API put this in build.gradle

vectorDrawables.useSupportLibrary = true