resize bitmap

getResizedBitmap.kt

suspend fun getResizedBitmap(bm: Bitmap, newWidth: Int, newHeight: Int): Bitmap {
    return withContext(Dispatchers.IO) {

        val width = bm.width
        val height = bm.height
        val scaleWidth = newWidth.toFloat() / width
        val scaleHeight = newHeight.toFloat() / height
        val matrix = Matrix()
        matrix.postScale(scaleWidth, scaleHeight)

        val resizedBitmap = Bitmap.createBitmap(
                bm, 0, 0, width, height, matrix, false)
        bm.recycle()
        resizedBitmap
    }
}