Coloring.java 文件源码

/**
 * Colors the given drawable to the specified color. Uses {@link PorterDuff.Mode#SRC_ATOP}.
 *
 * @param context  Which context to use
 * @param drawable Which drawable to color
 * @param color    Which color to use
 * @return A colored drawable, new instance in most cases for bitmaps, cached instance for most other cases
 */
@NonNull
public static Drawable colorDrawable(@NonNull final Context context, @NonNull final Drawable drawable, @ColorInt final int color) {
    if (drawable instanceof VectorDrawable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        return colorVectorDrawable((VectorDrawable) drawable, color);
    }

    if (drawable instanceof VectorDrawableCompat) {
        return colorVectorDrawableCompat((VectorDrawableCompat) drawable, color);
    }

    if (drawable instanceof ColorDrawable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        ((ColorDrawable) drawable).setColor(color);
        return drawable;
    }

    if (drawable instanceof GradientDrawable) {
        drawable.setColorFilter(color, PorterDuff.Mode.SRC_ATOP);
        return drawable;
    }

    if (drawable instanceof BitmapDrawable) {
        final Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        return new BitmapDrawable(context.getResources(), colorBitmap(bitmap, color));
    }

    // have no idea what this is..
    return colorUnknownDrawable(drawable, color);
}