```class BitmapListConverter { @TypeConverter ...

# android

[Abdullah]

class BitmapListConverter {
    @TypeConverter
    fun toBitmapList(bitmap: Bitmap): ArrayList<Bitmap> {
        return arrayListOf(bitmap)
    }

    @TypeConverter
    fun fromBitmapList(array:ArrayList<Bitmap>): Bitmap {
        val bmp = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888) 
        return if (array.isEmpty()) bmp else array.first() //this causing issue
    }
}

Hi I need to converter for ArrayListBitmap for room database but my converter is wrong I think. How can resolve it?

[Christiano]

According to this article you could save a bitmap by converting it to base64 before saving and converting it back to a bitmap upon reading it.

Besides this, an SO post also shows that SQLite (which Room uses internally) can also use Blob data, so check out this post for more info.