TensorFlow Hot or Not example. Classification of the taken photo.

MainActivity.kt

class MainActivity : AppCompatActivity {
    
    //...
    private val handler = Handler()
    private var photoFilePath = ""
    
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        val file = File(photoFilePath)
        if (requestCode == REQUEST_TAKE_PICTURE && file.exists()) {
            classifyPhoto(file)
        }
    }

    private fun classifyPhoto(file: File) {
        val photoBitmap = BitmapFactory.decodeFile(file.absolutePath)
        val croppedBitmap = ImageUtils.getCroppedBitmap(photoBitmap)
        classifyAndShowResult(croppedBitmap)
        imagePhoto.setImageBitmap(photoBitmap)
    }

    private fun classifyAndShowResult(croppedBitmap: Bitmap) {
        runInBackground(
                Runnable {
                    val result = classifier.recognizeImage(croppedBitmap)
                    //show result
                })
    }

    @Synchronized
    private fun runInBackground(runnable: Runnable) {
        handler.post(runnable)
    }
}