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Cannot access class 'com.google.common.util.concurrent.ListenableFuture'. Check your module classpath for missing or conflicting dependencies

I am trying to integrate CameraX in my flutter app but I get error saying Cannot access class 'com.google.common.util.concurrent.ListenableFuture'. Check your module classpath for missing or conflicting dependencies
There error comes from below line
val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
Below is my native view
class CealScanQrView(val context: Context, id: Int, creationParams: Map<String?, Any?>?) :
PlatformView {
private var mCameraProvider: ProcessCameraProvider? = null
private var preview: PreviewView
private var linearLayout: LinearLayout = LinearLayout(context)
private lateinit var cameraExecutor: ExecutorService
private lateinit var options: BarcodeScannerOptions
private lateinit var scanner: BarcodeScanner
private var analysisUseCase: ImageAnalysis = ImageAnalysis.Builder()
.build()
companion object {
private val REQUIRED_PERMISSIONS = mutableListOf(Manifest.permission.CAMERA).toTypedArray()
}
init {
val linearLayoutParams = ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT
)
linearLayout.layoutParams = linearLayoutParams
linearLayout.orientation = LinearLayout.VERTICAL
preview = PreviewView(context)
preview.layoutParams = ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT
)
linearLayout.addView(preview)
setUpCamera()
}
private fun setUpCamera(){
if (allPermissionsGranted()) {
startCamera()
}
cameraExecutor = Executors.newSingleThreadExecutor()
options = BarcodeScannerOptions.Builder()
.setBarcodeFormats(
Barcode.FORMAT_QR_CODE)
.build()
scanner = BarcodeScanning.getClient(options)
analysisUseCase.setAnalyzer(
// newSingleThreadExecutor() will let us perform analysis on a single worker thread
Executors.newSingleThreadExecutor()
) { imageProxy ->
processImageProxy(scanner, imageProxy)
}
}
override fun getView(): View {
return linearLayout
}
override fun dispose() {
cameraExecutor.shutdown()
}
#SuppressLint("UnsafeOptInUsageError")
private fun processImageProxy(
barcodeScanner: BarcodeScanner,
imageProxy: ImageProxy
) {
imageProxy.image?.let { image ->
val inputImage =
InputImage.fromMediaImage(
image,
imageProxy.imageInfo.rotationDegrees
)
barcodeScanner.process(inputImage)
.addOnSuccessListener { barcodeList ->
val barcode = barcodeList.getOrNull(0)
// `rawValue` is the decoded value of the barcode
barcode?.rawValue?.let { value ->
mCameraProvider?.unbindAll()
}
}
.addOnFailureListener {
// This failure will happen if the barcode scanning model
// fails to download from Google Play Services
}
.addOnCompleteListener {
// When the image is from CameraX analysis use case, must
// call image.close() on received images when finished
// using them. Otherwise, new images may not be received
// or the camera may stall.
imageProxy.image?.close()
imageProxy.close()
}
}
}
private fun allPermissionsGranted() = REQUIRED_PERMISSIONS.all {
ContextCompat.checkSelfPermission(context, it) == PackageManager.PERMISSION_GRANTED
}
private fun startCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
cameraProviderFuture.addListener({
// Used to bind the lifecycle of cameras to the lifecycle owner
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
mCameraProvider = cameraProvider
// Preview
val surfacePreview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(preview.surfaceProvider)
}
// Select back camera as a default
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
// Unbind use cases before rebinding
cameraProvider.unbindAll()
// Bind use cases to camera
cameraProvider.bindToLifecycle(
(context as FlutterActivity),
cameraSelector,
surfacePreview,
analysisUseCase,
)
} catch (exc: Exception) {
// Do nothing on exception
}
}, ContextCompat.getMainExecutor(context))
}
}
class CealScanQrViewFactory : PlatformViewFactory(StandardMessageCodec.INSTANCE) {
override fun create(context: Context, viewId: Int, args: Any?): PlatformView {
val creationParams = args as Map<String?, Any?>?
return CealScanQrView(context, viewId, creationParams)
}
}

Add this line to your app build.gradle dependencies:
implementation 'com.google.guava:guava:29.0-android'

How to reduce image size captured with CameraX on Android?

I'm trying to understand how to use CameraX by studying this example:
class MainActivity : AppCompatActivity(), EasyPermissions.PermissionCallbacks {
private var imageCapture: ImageCapture? = null
private lateinit var outputDirectory: File
private lateinit var cameraExecutor: ExecutorService
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
requestPermission()
// Set up the listener for take photo button
camera_capture_button.setOnClickListener { takePhoto() }
outputDirectory = getOutputDirectory()
cameraExecutor = Executors.newSingleThreadExecutor()
}
private fun takePhoto() {
// Get a stable reference of the modifiable image capture use case
val imageCapture = imageCapture ?: return
// Create time-stamped output file to hold the image
val photoFile = File(
outputDirectory,
SimpleDateFormat(
FILENAME_FORMAT, Locale.US
).format(System.currentTimeMillis()) + ".jpg"
)
// Create output options object which contains file + metadata
val outputOptions = ImageCapture.OutputFileOptions.Builder(photoFile).build()
// Set up image capture listener, which is triggered after photo has
// been taken
imageCapture.takePicture(
outputOptions,
ContextCompat.getMainExecutor(this),
object : ImageCapture.OnImageSavedCallback {
override fun onError(exc: ImageCaptureException) {
Log.e(TAG, "Photo capture failed: ${exc.message}", exc)
}
override fun onImageSaved(output: ImageCapture.OutputFileResults) {
val savedUri = Uri.fromFile(photoFile)
val msg = "Photo capture succeeded: $savedUri"
Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
Log.d(TAG, msg)
}
})
}
private fun startCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener({
// Used to bind the lifecycle of cameras to the lifecycle owner
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
// Preview
val preview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(viewFinder.surfaceProvider)
}
imageCapture = ImageCapture.Builder()
.build()
val imageAnalyzer = ImageAnalysis.Builder()
.build()
.also {
it.setAnalyzer(cameraExecutor, LuminosityAnalyzer { luma ->
Log.d(TAG, "Average luminosity: $luma")
})
}
// Select back camera as a default
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
// Unbind use cases before rebinding
cameraProvider.unbindAll()
// Bind use cases to camera
cameraProvider.bindToLifecycle(
this, cameraSelector, preview, imageCapture, imageAnalyzer
)
} catch (exc: Exception) {
Log.e(TAG, "Use case binding failed", exc)
}
}, ContextCompat.getMainExecutor(this))
}
private fun getOutputDirectory(): File {
val mediaDir = externalMediaDirs.firstOrNull()?.let {
File(it, resources.getString(R.string.app_name)).apply { mkdirs() }
}
return if (mediaDir != null && mediaDir.exists())
mediaDir else filesDir
}
override fun onDestroy() {
super.onDestroy()
cameraExecutor.shutdown()
}
private fun requestPermission() {
if (CameraUtility.hasCameraPermissions(this)) {
startCamera()
return
}
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
EasyPermissions.requestPermissions(
this,
"You need to accept the camera permission to use this app",
REQUEST_CODE_CAMERA_PERMISSION,
Manifest.permission.CAMERA
)
} else {
EasyPermissions.requestPermissions(
this,
"You need to accept the camera permission to use this app",
REQUEST_CODE_CAMERA_PERMISSION,
Manifest.permission.CAMERA
)
}
}
It works. The images captured with this code are rather big. On Pixel 3, it produces 4032x3024 JPEGs (usually around 4.5 to 6 MB). Does CameraX has a built-in feature to reduce the JPEG size?
I tried this:
imageCapture = ImageCapture.Builder()
.setCaptureMode(ImageCapture.CAPTURE_MODE_MINIMIZE_LATENCY)
.setTargetResolution(Size(800, 600))
.build()
and this:
val imageAnalyzer = ImageAnalysis.Builder()
.setTargetResolution(Size(800,600))
.build()
.also {
it.setAnalyzer(cameraExecutor, LuminosityAnalyzer { luma ->
})
}
Doesn't work. Still get the same 4032x3024 JPEG. I wonder if I don't understand the CameraX API properly.

Displaying an image from internal storage from android phone with Kotlin

I have made a very simple app to take a picture using camera x, with a viewfinder and it displays the image taken in the same activity
I am trying to get all the images taken from the internal storage and display them in another activity in the app with a recycler view
Im fine with recycler views, and I can use one with external Api's to display images and data but I just cannot figure out how to get the images from the internal storage, and add them to a list to display in the recycler view, Ive tried checking documentation but im getting nowhere, all I need is a simple code which will allow me to display the images as a thumbnail
class MainActivity : AppCompatActivity() {
private var imageCapture: ImageCapture? = null
private lateinit var outputDirectory: File
private lateinit var cameraExecutor: ExecutorService
private val TAG = "Snap"
private val FILENAME_FORMAT = "yyyy-MM-dd-HH-mm-ss-SSS"
private val REQUEST_CODE_PERMISSIONS = 10
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
btnSnap.setOnClickListener {
takePhoto()
}
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) ==
PackageManager.PERMISSION_GRANTED
) {
startCamera()
} else {
ActivityCompat.requestPermissions(
this,
arrayOf(Manifest.permission.CAMERA), REQUEST_CODE_PERMISSIONS
)
}
outputDirectory = getOutputDirectory()
cameraExecutor = Executors.newSingleThreadExecutor()
}
override fun onRequestPermissionsResult(requestCode: Int,
permissions: Array<String>, grantResults: IntArray ) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) ==
PackageManager.PERMISSION_GRANTED) {
startCamera()
} else {
Toast.makeText(this, "Permissions not granted by the user",
Toast.LENGTH_SHORT).show()
finish()
}
}
private fun startCamera() {
val cameraProviderFuture = getInstance(this)
//add listener to the ProcessCameraProvider
cameraProviderFuture.addListener(Runnable {
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
val preview = Preview.Builder().build().also {
it.setSurfaceProvider(viewFinder.createSurfaceProvider())}
imageCapture = ImageCapture.Builder().build()
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
//unbind use cases before rebinding
cameraProvider.unbindAll()
cameraProvider.bindToLifecycle(this, cameraSelector, preview,
imageCapture)
} catch (exc: Exception) {
Log.e(TAG, "Use case binding failed", exc)
}
}, ContextCompat.getMainExecutor(this))
}
private fun takePhoto() { val imageCapture = imageCapture ?: return
val photoFile = File(outputDirectory, SimpleDateFormat(FILENAME_FORMAT,
Locale.UK).format(System.currentTimeMillis()) + ".jpg")
val outputOpts = ImageCapture.OutputFileOptions.Builder(photoFile).build()
imageCapture.takePicture(outputOpts,
ContextCompat.getMainExecutor(this), object :
ImageCapture.OnImageSavedCallback {
override fun onError(exc: ImageCaptureException) {
Log.e(TAG, "Photo capture failed: ${exc.message}", exc)
}
//save the photo to the file and display on screen
override fun onImageSaved(output: ImageCapture.OutputFileResults) {
val savedUri = Uri.fromFile(photoFile)
imgSnap.setImageURI(savedUri)
}
})
}
private fun getOutputDirectory(): File {
val mediaDir = externalMediaDirs.firstOrNull()?.let {
File(it, resources.getString(R.string.app_name)).apply { mkdirs() }
}
return if (mediaDir != null && mediaDir.exists()) mediaDir else filesDir
}
}

You can check out this link that provides you the better overview about using RecyclerView..
And in your bind view holder method in your adapter you can use this code to get the images from the storage and show it into your recyclerview as thumbnail.
String path = Environment.getExternalStorageDirectory() + "/myImage.jpg";
Bitmap bitmap = BitmapFactory.decodeFile(path);
You can learn more about the getting the images from storage Link.

How can I recognize barcode with firebase ML Kit?

I am trying to recognize qr code in my app when camera is turned on. And then transfer to according activity depend on qr code text.
I am doing it with firebase ML kit and CameraX library with help of google's documentation but I have errors with ImageAnalyzer's analyze method.
ImageAnalyzer offers me to implement analyze method even though it's already implemented. But it has two parameters: (imageProxy: ImageProxy?, degrees: Int) and says that it overrides nothing. if I delete second parameter (degrees: Int), then it recognizes, but "degrees" is not recognized.
I tried to follow some tutorials but they use lots of third party libraries. I'd like to use cameraX and ML Kit.
How can I fix this?
Here is my code:
package ge.softservice.nfcwithactivties
import android.Manifest
import android.annotation.SuppressLint
import android.content.pm.PackageManager
import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.camera.core.*
import androidx.camera.lifecycle.ProcessCameraProvider
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import com.google.firebase.ml.vision.FirebaseVision
import com.google.firebase.ml.vision.barcode.FirebaseVisionBarcode
import com.google.firebase.ml.vision.barcode.FirebaseVisionBarcodeDetectorOptions
import com.google.firebase.ml.vision.common.FirebaseVisionImage
import com.google.firebase.ml.vision.common.FirebaseVisionImageMetadata
import kotlinx.android.synthetic.main.activity_qr.*
import java.io.File
import java.util.concurrent.ExecutorService
import java.util.concurrent.Executors
class QrActivity : AppCompatActivity() {
private var preview: Preview? = null
private var imageAnalyzer: ImageAnalysis? = null
private var camera: Camera? = null
internal var isDetected = false
private lateinit var outputDirectory: File
private lateinit var cameraExecutor: ExecutorService
override fun onRequestPermissionsResult(
requestCode: Int, permissions: Array<String>, grantResults:
IntArray
) {
if (requestCode == REQUEST_CODE_PERMISSIONS) {
if (allPermissionsGranted()) {
startCamera()
} else {
Toast.makeText(
this,
"Permissions not granted by the user.",
Toast.LENGTH_SHORT
).show()
finish()
}
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_qr)
// Request camera permissions
if (allPermissionsGranted()) {
startCamera()
} else {
ActivityCompat.requestPermissions(
this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS
)
}
// outputDirectory = getOutputDirectory()
cameraExecutor = Executors.newSingleThreadExecutor()
}
private fun startCamera() {
val options = FirebaseVisionBarcodeDetectorOptions.Builder()
.setBarcodeFormats(
FirebaseVisionBarcode.FORMAT_QR_CODE,
FirebaseVisionBarcode.FORMAT_AZTEC
)
.build()
val detector = FirebaseVision.getInstance().getVisionBarcodeDetector(options)
val result = detector.detectInImage(image)
.addOnSuccessListener { barcodes ->
// Task completed successfully
// ...
}
.addOnFailureListener {
// Task failed with an exception
// ...
}
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener(Runnable {
// Used to bind the lifecycle of cameras to the lifecycle owner
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
// Preview
preview = Preview.Builder()
.build()
// Select back camera
val cameraSelector =
CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build()
try {
// Unbind use cases before rebinding
cameraProvider.unbindAll()
// Bind use cases to camera
camera = cameraProvider.bindToLifecycle(
this, cameraSelector, preview
)
preview?.setSurfaceProvider(viewFinder.createSurfaceProvider(/*camera?.cameraInfo*/))
} catch (exc: Exception) {
Log.e(TAG, "Use case binding failed", exc)
}
}, ContextCompat.getMainExecutor(this))
}
private fun takePhoto() {
// TODO
}
private fun allPermissionsGranted() = REQUIRED_PERMISSIONS.all {
ContextCompat.checkSelfPermission(
baseContext, it
) == PackageManager.PERMISSION_GRANTED
}
/* fun getOutputDirectory(): File {
val mediaDir = externalMediaDirs.firstOrNull()?.let {
File(it, resources.getString(R.string.app_name)).apply { mkdirs() } }
return if (mediaDir != null && mediaDir.exists())
mediaDir else filesDir
}*/
companion object {
private const val TAG = "CameraXBasic"
private const val FILENAME_FORMAT = "yyyy-MM-dd-HH-mm-ss-SSS"
private const val REQUEST_CODE_PERMISSIONS = 10
private val REQUIRED_PERMISSIONS = arrayOf(Manifest.permission.CAMERA)
}
}
private class MyImageAnalyzer : ImageAnalysis.Analyzer {
private fun degreesToFirebaseRotation(degrees: Int): Int = when(degrees) {
0 -> FirebaseVisionImageMetadata.ROTATION_0
90 -> FirebaseVisionImageMetadata.ROTATION_90
180 -> FirebaseVisionImageMetadata.ROTATION_180
270 -> FirebaseVisionImageMetadata.ROTATION_270
else -> throw Exception("Rotation must be 0, 90, 180, or 270.")
}
#SuppressLint("UnsafeExperimentalUsageError")
override fun analyze(imageProxy: ImageProxy?, degrees: Int) {
val mediaImage = imageProxy?.image
val imageRotation = degreesToFirebaseRotation(degrees)
if (mediaImage != null) {
val image = FirebaseVisionImage.fromMediaImage(mediaImage, imageRotation)
// Pass image to an ML Kit Vision API
// ...
}
}
}

Looking at your code snippet, it seems you're using camera-camera2 version beta04 with camerax-view version alpha11.
The documentation may be out of date, the Analyzer now only receives an ImageProxy inside its analyze callback. The degrees information that was previously also passed in can now be accessed via ImageProxy.getImageInfo().getRotationDegrees().
So your Analyzer should look like this
private class MyImageAnalyzer : ImageAnalysis.Analyzer {
private fun degreesToFirebaseRotation(degrees: Int): Int {
// ...
}
override fun analyze(imageProxy: ImageProxy) {
val mediaImage = imageProxy.image
val imageRotation = degreesToFirebaseRotation(imageProxy.imageInfo.rotationDegrees)
val image = FirebaseVisionImage.fromMediaImage(mediaImage, imageRotation)
// ...
}
}

takePicture require executor on CameraX (1.0.0-alpha06)

After update from
androidx.camera:camera-core:1.0.0-alpha03
to
androidx.camera:camera-core:1.0.0-alpha06
signatures of methods setTargetAspectRatio (in ImageCaptureConfig.Builder) and takePicture (in ImageCapture) have been changed.
Official documentation and info in web doesn't show how to use new methods (how to specify executor).
Code which broken after update:
...
val captureConfig = ImageCaptureConfig.Builder()
.setTargetAspectRatioCustom(Rational(1, 1)) //this method changed
.setFlashMode(flashMode)
.setLensFacing(lensFacing)
.build()
val capture = ImageCapture(captureConfig)
binding.takeAPhoto.setOnClickListener {
...
val imageFile = createTempFile(System.currentTimeMillis().toString(), ".jpg")
capture.takePicture(imageFile, object : ImageCapture.OnImageSavedListener { //this method also changed
override fun onImageSaved(file: File) {
...
}
override fun onError(useCaseError: ImageCapture.UseCaseError, message: String, cause: Throwable?) {
...
})
}
}
Does anyone have (or know where to find) example of how to use new methods?
Thanks in advance

The official Google Codelabs which obviously have been updated recently use: Executors.newSingleThreadExecutor()
Reference: https://codelabs.developers.google.com/codelabs/camerax-getting-started/#4
Edit: Since #kos's response also makes sense to me, I've added these two official Android docs references:
https://developer.android.com/reference/java/util/concurrent/Executors.html#newSingleThreadExecutor()
https://developer.android.com/reference/java/util/concurrent/Executors.html#newCachedThreadPool()
This way every reader of this topic can make up his/her own mind with respect to executors.
FURTHER EDIT: There are crucial API changes since 1.0.0-alpha07 so I studied some of the docs. There's a GitHub sample showing executor retrieval like so mainExecutor = ContextCompat.getMainExecutor(requireContext())(Source)
If some of you already implemented CameraX and it works fine, I'd definitely wait for the beta release as recommended by Android's release notes

I faced same thing as you are facing. I resolved it from my side.
class MainActivity : AppCompatActivity(), Executor {
private var right: Int = 0
private var bottom: Int = 0
private var left: Int = 0
private var top: Int = 0
private lateinit var preview: Preview
private val REQUEST_CODE_PERMISSIONS = 10
private val REQUIRED_PERMISSIONS = arrayOf(Manifest.permission.CAMERA)
private lateinit var imageCapture: ImageCapture
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
if (allPermissionsGranted()) {
viewFinder.post { startCamera() }
} else {
ActivityCompat.requestPermissions(this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS)
}
viewFinder.addOnLayoutChangeListener { _, _, _, _, _, _, _, _, _ ->
updateTransform()
}
buttonPlus.setOnClickListener {
if (right < 100) {
right += 100
bottom += 100
left += 100
top += 100
val my = Rect(left, top, right, bottom)
preview.zoom(my)
}
}
buttonMinus.setOnClickListener {
if (right > 0) {
right -= 100
bottom -= 100
left -= 100
top -= 100
val my = Rect(left, top, right, bottom)
preview.zoom(my)
}
}
}
#SuppressLint("RestrictedApi")
private fun startCamera() {
val metrics = DisplayMetrics().also { viewFinder.display.getRealMetrics(it) }
val screenAspectRatio = Rational(metrics.widthPixels, metrics.heightPixels)
val previewConfig = PreviewConfig.Builder().apply {
setTargetAspectRatioCustom(screenAspectRatio)
setTargetRotation(viewFinder.display.rotation)
}.build()
preview = Preview(previewConfig)
preview.setOnPreviewOutputUpdateListener {
val parent = viewFinder.parent as ViewGroup
parent.removeView(viewFinder)
parent.addView(viewFinder, 0)
viewFinder.surfaceTexture = it.surfaceTexture
updateTransform()
}
CameraX.bindToLifecycle(this, preview)
captureImage()
}
#SuppressLint("RestrictedApi")
private fun captureImage() {
val imageCaptureConfig = ImageCaptureConfig.Builder()
.apply {
setTargetAspectRatioCustom(Rational(1, 1))
setCaptureMode(ImageCapture.CaptureMode.MIN_LATENCY)
}.build()
imageCapture = ImageCapture(imageCaptureConfig)
CameraX.bindToLifecycle(this, imageCapture)
capture_button.setOnClickListener {
val file = File(this.externalMediaDirs.first(), "${System.currentTimeMillis()}.jpg")
imageCapture.takePicture(file, this, object : ImageCapture.OnImageSavedListener {
override fun onImageSaved(file: File) {
val msg = "Photo capture succeeded: ${file.absolutePath}"
Log.d("CameraXApp", msg)
}
override fun onError(imageCaptureError: ImageCapture.ImageCaptureError, message: String, cause: Throwable?) {
val msg = "Photo capture failed: $message"
Log.e("CameraXApp", msg)
cause?.printStackTrace()
}
})
}
}
override fun execute(command: Runnable) {
command.run()
}
private fun updateTransform() {
val matrix = Matrix()
val centerX = viewFinder.width / 2f
val centerY = viewFinder.height / 2f
val rotationDegrees = when (viewFinder.display.rotation) {
Surface.ROTATION_0 -> 0
Surface.ROTATION_90 -> 90
Surface.ROTATION_180 -> 180
Surface.ROTATION_270 -> 270
else -> return
}
matrix.postRotate(-rotationDegrees.toFloat(), centerX, centerY)
viewFinder.setTransform(matrix)
}
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
if (requestCode == REQUEST_CODE_PERMISSIONS) {
if (allPermissionsGranted()) {
viewFinder.post { startCamera() }
} else {
Toast.makeText(this, "Permissions not granted by the user.", Toast.LENGTH_SHORT).show()
finish()
}
}
}
private fun allPermissionsGranted() = REQUIRED_PERMISSIONS.all {
ContextCompat.checkSelfPermission(baseContext, it) == PackageManager.PERMISSION_GRANTED
}
override fun onDestroy() {
super.onDestroy()
imageCapture.let {
CameraX.unbind(imageCapture)
}
}
}
And the output is (As I print log in onImageSaved method)
Photo capture succeeded: /storage/emulated/0/Android/media/com.akshay.cameraxzoominoutdemo/1571052301192.jpg
It's working fine for me, try out this.

You can do it like this.
imageCapture.takePicture(file, { it.run() }, object : ImageCapture.OnImageSavedListener {
override fun onImageSaved(file: File) {}
override fun onError(useCaseError: ImageCapture.ImageCaptureError, message: String, cause: Throwable?) {}
})

Here is a change log for the changes in alpha06 : https://developer.android.com/jetpack/androidx/releases/camera
setTargetAspectRatio() method now takes AspectRatio enum with 4_3 or 16_9 value.
takePicture() method takes (file, metadata, executor, imageSavedListener) // could use executor as per your case/need. example is val executor = Executors.newSingleThreadExecutor()
instead of useCase.onPreviewOutputUpdateListener = use useCase.setOnPreviewOutputUpdateListener()
FYI : CameraX will be in Beta in Dec 2019

Inside your click listener call this function/method :
private fun saveImage(){
val file = File(this.externalMediaDirs.first(), "${System.currentTimeMillis()}.jpg")
val fileB = ImageCapture.OutputFileOptions.Builder(file).build()
imageCapture.takePicture(fileB, ContextCompat.getMainExecutor(this), object : ImageCapture.OnImageSavedCallback {
override fun onImageSaved(fileB: ImageCapture.OutputFileResults) {
val msg = "${fileB.savedUri} - ${file.absolutePath} - ${file.toURI()}"
}
override fun onError(imageCaptureError: ImageCaptureException) {
val msg = "Photo capture failed: ${imageCaptureError.toString()}"
}
})
}
And the msg in onImageSaved will contain something like this :
null - /storage/emulated/0/Android/media/com.mua.camx/1607589430984.jpg - file:/storage/emulated/0/Android/media/com.mua.camx/1607589430984.jpg

You have to only run the command as below.
#Override
public void execute(Runnable command) {
command.run(); // <-- THIS IS NEEDED
}

CameraX provides with built-in executors and take picture can be implemented as below:
imgCaptureButton.setOnClickListener(new View.OnClickListener() {
#Override
#SuppressLint("RestrictedApi")
public void onClick(View v) {
imgCap.takePicture(CameraXExecutors.mainThreadExecutor(),new ImageCapture.OnImageCapturedListener() {
#Override
public void onCaptureSuccess(ImageProxy image, int rotationDegrees) {
super.onCaptureSuccess(image, rotationDegrees);
// Play with the Image here.
}
});
}
});
It does not use File to save the image, instead saves the image as a buffer in the memory.