recognition.kt

val image: FirebaseVisionImage
try {
    val uri = Uri.fromFile(imageFile)
    image = FirebaseVisionImage.fromFilePath(context, uri)
    val detector: FirebaseVisionTextRecognizer = FirebaseVision.getInstance().onDeviceTextRecognizer
    val task = detector.processImage(image)
        .addOnSuccessListener { result ->
            val text = result.text
        }
        .addOnFailureListener { error ->
            // Handle exception
        }    
} catch (e: IOException) {
    // Handle exception
}