Set android shape color programmatically

Question

I am editing to make the question simpler, hoping that helps towards an accurate answer. Say I have the following `oval` shape: ``` ``` How do I set the color programmatically, from within an activity class?

Accepted Answer

Note: Answer has been updated to cover the scenario where `background` is an instance of `ColorDrawable`. Thanks Tyler Pfaff, for pointing this out.

The drawable is an oval and is the background of an ImageView

Get the `Drawable` from `imageView` using `getBackground()`:

```
Drawable background = imageView.getBackground();
```

Check against usual suspects:

```
if (background instanceof ShapeDrawable) {
    // cast to 'ShapeDrawable'
    ShapeDrawable shapeDrawable = (ShapeDrawable) background;
    shapeDrawable.getPaint().setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
} else if (background instanceof GradientDrawable) {
    // cast to 'GradientDrawable'
    GradientDrawable gradientDrawable = (GradientDrawable) background;
    gradientDrawable.setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
} else if (background instanceof ColorDrawable) {
    // alpha value may need to be set again after this call
    ColorDrawable colorDrawable = (ColorDrawable) background;
    colorDrawable.setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
}
```

Compact version:

```
Drawable background = imageView.getBackground();
if (background instanceof ShapeDrawable) {
    ((ShapeDrawable)background).getPaint().setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
} else if (background instanceof GradientDrawable) {
    ((GradientDrawable)background).setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
} else if (background instanceof ColorDrawable) {
    ((ColorDrawable)background).setColor(ContextCompat.getColor(mContext,R.color.colorToSet));
}
```

Note that null-checking is not required.

However, you should use `mutate()` on the drawables before modifying them if they are used elsewhere. (By default, drawables loaded from XML share the same state.)

Set android shape color programmatically

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