Set ImageView Drawable to PaintDrawable - Android

Issue

I would like to set my ImageView to a SweepGradient.

Here's what I tried:

protected void onCreate(@Nullable Bundle savedInstanceState) {

    ImageView colorPicker = findViewById(R.id.color_picker);
    colorPicker.setImageDrawable(CreateColorPickerDrawable());

}

private PaintDrawable CreateColorPickerDrawable()
{
    int[] colors = {0xFFFF0000, 0xFF00FF00, 0xFF0000FF};
    PaintDrawable paintDrawable = new PaintDrawable();

    paintDrawable.setCornerRadius(getResources().getDimension(R.dimen.corner_radius));

    SweepGradient sweepGradient = new SweepGradient(50, 50, colors, null);
    paintDrawable.getPaint().setShader(sweepGradient);

    return paintDrawable;
}

But no gradient appears.

I've also seen this: Imageview set color filter to gradient

But I'm thinking there's got to be a simpler solution than that (plus it requires a bitmap src and I just want my ImageView to be a rectangle w/ rounded corners [which can be done easily w/ the PaintDrawable]).

If anyone has any guidance/advice it would be much appreciated! Ty!

Solution

I was being a derp. I just had to switch the ImageView to a normal View and then I could replace the background drawable to my paintDrawable.

protected void onCreate(@Nullable Bundle savedInstanceState) {

View colorPicker = findViewById(R.id.color_picker);
colorPicker.setBackground(CreateColorPickerDrawable());

}

private PaintDrawable CreateColorPickerDrawable() {
int[] colors = {0xFFFF0000, 0xFF00FF00, 0xFF0000FF};
PaintDrawable paintDrawable = new PaintDrawable();

paintDrawable.setCornerRadius(getResources().getDimension(R.dimen.corner_radius));

SweepGradient sweepGradient = new SweepGradient(50, 50, colors, null);
paintDrawable.getPaint().setShader(sweepGradient);

return paintDrawable;
}

Answered By - Beks_Omega