ML Kit Sample : thanks by source https://github.com/yanzm/MLKitSample

CloudAPIDetection.kt

package input.your.pkg

import android.graphics.Bitmap
import android.view.View
import com.google.firebase.ml.vision.FirebaseVision
import com.google.firebase.ml.vision.common.FirebaseVisionImage
import kotlinx.android.synthetic.main.activity_main.*


public fun MainActivity.detectTextOnCloud(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

//    val options = FirebaseVisionCloudDetectorOptions.Builder()
//            .setModelType(FirebaseVisionCloudDetectorOptions.LATEST_MODEL)
//            .setMaxResults(15)
//            .build()

    FirebaseVision.getInstance()
//            .getVisionCloudTextDetector(options)
            .visionCloudTextDetector
            .detectInImage(image)
            .addOnSuccessListener { cloudText ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                for (page in cloudText.pages) {
                    for (block in page.blocks) {
                        for (paragraph in block.paragraphs) {
                            for (word in paragraph.words) {
                                val text = word.symbols.joinToString(separator = "") { it.text }
                                word.boundingBox?.let {
                                    overlay.add(BoxData(text, it))
                                }
                            }
                        }
                    }
                }
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}

public fun MainActivity.labelOnCloud(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

//    val options = FirebaseVisionCloudDetectorOptions.Builder()
//            .setModelType(FirebaseVisionCloudDetectorOptions.LATEST_MODEL)
//            .setMaxResults(15)
//            .build()

    FirebaseVision.getInstance()
//            .getVisionCloudLabelDetector(options)
            .visionCloudLabelDetector
            .detectInImage(image)
            .addOnSuccessListener { labels ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                overlay.add(TextsData(labels.map { "${it.label}, ${it.confidence}" }))
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}



public fun MainActivity.detectLandOnCloud(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

//    val options = FirebaseVisionCloudDetectorOptions.Builder()
//            .setModelType(FirebaseVisionCloudDetectorOptions.LATEST_MODEL)
//            .setMaxResults(15)
//            .build()

    FirebaseVision.getInstance()
//            .getVisionCloudLandmarkDetector(options)
            .visionCloudLandmarkDetector
            .detectInImage(image)
            .addOnSuccessListener { labels ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                overlay.add(TextsData(labels.map { "${it.landmark}, ${it.confidence}" }))
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}

OnDeviceDetection.kt

package input.your.pkg

import android.graphics.Bitmap
import android.view.View
import com.google.firebase.ml.vision.FirebaseVision
import com.google.firebase.ml.vision.common.FirebaseVisionImage
import com.google.firebase.ml.vision.face.FirebaseVisionFaceDetectorOptions
import kotlinx.android.synthetic.main.activity_main.*


public fun MainActivity.detectText(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

    FirebaseVision.getInstance()
            .visionTextDetector
            .detectInImage(image)
            .addOnSuccessListener { texts ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                for (block in texts.blocks) {
                    for (line in block.lines) {
                        for (element in line.elements) {
                            element.boundingBox?.let {
                                overlay.add(BoxData(element.text, it))
                            }
                        }
                    }
                }
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}

public fun MainActivity.detectFaces(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

    val options = FirebaseVisionFaceDetectorOptions.Builder()
            .setModeType(FirebaseVisionFaceDetectorOptions.ACCURATE_MODE)
            .setLandmarkType(FirebaseVisionFaceDetectorOptions.ALL_LANDMARKS)
            .setClassificationType(FirebaseVisionFaceDetectorOptions.ALL_CLASSIFICATIONS)
            .setMinFaceSize(0.15f)
            .setTrackingEnabled(true)
            .build()

    FirebaseVision.getInstance()
            .getVisionFaceDetector(options)
            .detectInImage(image)
            .addOnSuccessListener { faces ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                for (face in faces) {
                    face.boundingBox?.let {
                        overlay.add(BoxData("", it))
                    }
                }
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}
public fun MainActivity.readBarCodes(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

// バーコードの種類を変更できる
//    val options = FirebaseVisionBarcodeDetectorOptions.Builder()
//            .setBarcodeFormats(
//                    FirebaseVisionBarcode.FORMAT_EAN_8,
//                    FirebaseVisionBarcode.FORMAT_EAN_13)
//            .build()

//
//    The following formats are supported:
//
//    Code 128 (FORMAT_CODE_128)
//    Code 39 (FORMAT_CODE_39)
//    Code 93 (FORMAT_CODE_93)
//    Codabar (FORMAT_CODABAR)
//    EAN-13 (FORMAT_EAN_13)
//    EAN-8 (FORMAT_EAN_8)
//    ITF (FORMAT_ITF)
//    UPC-A (FORMAT_UPC_A)
//    UPC-E (FORMAT_UPC_E)
//    QR Code (FORMAT_QR_CODE)
//    PDF417 (FORMAT_PDF417)
//    Aztec (FORMAT_AZTEC)
//    Data Matrix (FORMAT_DATA_MATRIX)

    val image = FirebaseVisionImage.fromBitmap(bitmap)

    FirebaseVision.getInstance()
//            .getVisionBarcodeDetector(options)
            .visionBarcodeDetector
            .detectInImage(image)
            .addOnSuccessListener { barcodes ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                for (barcode in barcodes) {
                    barcode.boundingBox?.let {
                        overlay.add(BoxData(barcode.rawValue ?: "", it))
                    }
                }
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}

public fun MainActivity.label(bitmap: Bitmap) {
    detectButton.isEnabled = false
    progressBar.visibility = View.VISIBLE

    val image = FirebaseVisionImage.fromBitmap(bitmap)

    // 閾値を指定
//    val options = FirebaseVisionLabelDetectorOptions.Builder()
//            .setConfidenceThreshold(0.8f)
//            .build()

    FirebaseVision.getInstance()
//            .getVisionLabelDetector(options)
            .visionLabelDetector
            .detectInImage(image)
            .addOnSuccessListener { labels ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE

                overlay.add(TextsData(labels.map { "${it.label}, ${it.confidence}" }))
            }
            .addOnFailureListener { e ->
                detectButton.isEnabled = true
                progressBar.visibility = View.GONE
                e.printStackTrace()
            }
}