BitmapUtils.java 文件源码

/**
 * Получение объекта Bitmap из Drawable из ресурсов
 */
public static Bitmap getBitmapFromDrawable(Context context, @DrawableRes int drawableId) {
    Drawable drawable = ContextCompat.getDrawable(context, drawableId);

    if (drawable instanceof BitmapDrawable) {
        return ((BitmapDrawable) drawable).getBitmap();
    } else if (drawable instanceof VectorDrawable || drawable instanceof VectorDrawableCompat) {
        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                                            drawable.getIntrinsicHeight(),
                                            Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    } else {
        throw new IllegalArgumentException("unsupported drawable type");
    }
}