ColorDrawable

ColorDrawable is a simple implementation of the Drawable interface in the Android framework. It represents a solid color fill and is provided as android.graphics.drawable.ColorDrawable. The drawable is defined by a single ARGB color value and is commonly used to fill a rectangular region with a uniform color, such as a background, placeholder, or tint.

It is constructed with ColorDrawable(int color), where color is an ARGB color value. The drawable draws its entire bounds using that color. The color value can be changed indirectly by applying a color filter or by replacing the Drawable. The class supports setAlpha(int) to adjust transparency and setColorFilter(ColorFilter) to apply a filter. Its getOpacity method reports OPAQUE, TRANSLUCENT, or TRANSPARENT based on the color.

ColorDrawable is a lightweight, non-animating drawable suitable for simple color blocks. It is often used as a background for views, a placeholder while loading content, or as a simple tint. For gradients or shapes with multiple colors, other drawables such as GradientDrawable or ShapeDrawable are used.

Related drawable types include GradientDrawable and ShapeDrawable, as well as general Drawable classes in the Android graphics package. ColorDrawable provides a minimal, efficient option when only a solid color fill is required.