add initial camera-x implementation

- add CameraXPreview
  - basic support image capture
  - basic support for video capture
  - add CameraXPreviewListener to prevent coupling to MainActivity
  - support switching camera, flash light modes
- modify MyPreview interface to add default implementation for methods not needed by the CameraXPreview

app/build.gradle

@@ -9,12 +9,12 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion 32
 
     defaultConfig {
         applicationId "com.simplemobiletools.camera"
         minSdkVersion 29
-        targetSdkVersion 31
+        targetSdkVersion 32
         versionCode 77
         versionName "5.3.1"
         setProperty("archivesBaseName", "camera")
@@ -65,4 +65,14 @@ dependencies {
     implementation 'com.github.SimpleMobileTools:Simple-Commons:d5e1100f27'
     implementation 'androidx.documentfile:documentfile:1.0.1'
     implementation "androidx.exifinterface:exifinterface:1.3.3"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.4.1"
+    implementation 'androidx.window:window:1.1.0-alpha02'
+
+    def camerax_version = '1.2.0-alpha02'
+    implementation "androidx.camera:camera-core:$camerax_version"
+    implementation "androidx.camera:camera-camera2:$camerax_version"
+    implementation "androidx.camera:camera-video:$camerax_version"
+    implementation "androidx.camera:camera-extensions:$camerax_version"
+    implementation "androidx.camera:camera-lifecycle:$camerax_version"
+    implementation "androidx.camera:camera-view:$camerax_version"
 }

app/src/main/kotlin/com/simplemobiletools/camera/activities/MainActivity.kt

@@ -7,7 +7,12 @@ import android.net.Uri
 import android.os.Bundle
 import android.os.Handler
 import android.provider.MediaStore
-import android.view.*
+import android.util.Log
+import android.view.KeyEvent
+import android.view.OrientationEventListener
+import android.view.View
+import android.view.Window
+import android.view.WindowManager
 import android.widget.RelativeLayout
 import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
@@ -16,17 +21,39 @@ import com.bumptech.glide.request.RequestOptions
 import com.simplemobiletools.camera.BuildConfig
 import com.simplemobiletools.camera.R
 import com.simplemobiletools.camera.extensions.config
-import com.simplemobiletools.camera.helpers.*
+import com.simplemobiletools.camera.helpers.FLASH_OFF
+import com.simplemobiletools.camera.helpers.FLASH_ON
+import com.simplemobiletools.camera.helpers.ORIENT_LANDSCAPE_LEFT
+import com.simplemobiletools.camera.helpers.ORIENT_LANDSCAPE_RIGHT
+import com.simplemobiletools.camera.helpers.ORIENT_PORTRAIT
+import com.simplemobiletools.camera.helpers.PhotoProcessor
+import com.simplemobiletools.camera.implementations.CameraXPreview
+import com.simplemobiletools.camera.implementations.CameraXPreviewListener
 import com.simplemobiletools.camera.implementations.MyCameraImpl
 import com.simplemobiletools.camera.interfaces.MyPreview
-import com.simplemobiletools.camera.views.CameraPreview
 import com.simplemobiletools.camera.views.FocusCircleView
 import com.simplemobiletools.commons.extensions.*
-import com.simplemobiletools.commons.helpers.*
+import com.simplemobiletools.commons.helpers.BROADCAST_REFRESH_MEDIA
+import com.simplemobiletools.commons.helpers.PERMISSION_CAMERA
+import com.simplemobiletools.commons.helpers.PERMISSION_RECORD_AUDIO
+import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_STORAGE
+import com.simplemobiletools.commons.helpers.REFRESH_PATH
 import com.simplemobiletools.commons.models.Release
-import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.android.synthetic.main.activity_main.btn_holder
+import kotlinx.android.synthetic.main.activity_main.capture_black_screen
+import kotlinx.android.synthetic.main.activity_main.change_resolution
+import kotlinx.android.synthetic.main.activity_main.last_photo_video_preview
+import kotlinx.android.synthetic.main.activity_main.settings
+import kotlinx.android.synthetic.main.activity_main.shutter
+import kotlinx.android.synthetic.main.activity_main.toggle_camera
+import kotlinx.android.synthetic.main.activity_main.toggle_flash
+import kotlinx.android.synthetic.main.activity_main.toggle_photo_video
+import kotlinx.android.synthetic.main.activity_main.video_rec_curr_timer
+import kotlinx.android.synthetic.main.activity_main.view_finder
+import kotlinx.android.synthetic.main.activity_main.view_holder
 
-class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
+class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener, CameraXPreviewListener {
+    private val TAG = "MainActivity"
     private val FADE_DELAY = 5000L
     private val CAPTURE_ANIMATION_DURATION = 100L
 
@@ -68,7 +95,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
     override fun onResume() {
         super.onResume()
         if (hasStorageAndCameraPermissions()) {
-            mPreview?.onResumed()
             resumeCameraItems()
             setupPreviewImage(mIsInPhotoMode)
             scheduleFadeOut()
@@ -97,14 +123,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
 
         hideTimer()
         mOrientationEventListener.disable()
-
-        if (mPreview?.getCameraState() == STATE_PICTURE_TAKEN) {
-            toast(R.string.photo_not_saved)
-        }
-
-        ensureBackgroundThread {
-            mPreview?.onPaused()
-        }
     }
 
     override fun onDestroy() {
@@ -201,8 +219,7 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         )
 
         checkVideoCaptureIntent()
-        mPreview = CameraPreview(this, camera_texture_view, mIsInPhotoMode)
-        view_holder.addView(mPreview as ViewGroup)
+        mPreview = CameraXPreview(this, view_finder, this)
         checkImageCaptureIntent()
         mPreview?.setIsImageCaptureIntent(isImageCaptureIntent())
 
@@ -217,7 +234,7 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         mFadeHandler = Handler()
         setupPreviewImage(true)
 
-        val initialFlashlightState = FLASH_OFF
+        val initialFlashlightState = config.flashlightState
         mPreview!!.setFlashlightState(initialFlashlightState)
         updateFlashlightState(initialFlashlightState)
     }
@@ -261,10 +278,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         toggle_flash.setImageResource(flashDrawable)
     }
 
-    fun updateCameraIcon(isUsingFrontCamera: Boolean) {
-        toggle_camera.setImageResource(if (isUsingFrontCamera) R.drawable.ic_camera_rear_vector else R.drawable.ic_camera_front_vector)
-    }
-
     private fun shutterPressed() {
         if (checkCameraAvailable()) {
             handleShutter()
@@ -283,19 +296,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         }
     }
 
-    fun toggleBottomButtons(hide: Boolean) {
-        runOnUiThread {
-            val alpha = if (hide) 0f else 1f
-            shutter.animate().alpha(alpha).start()
-            toggle_camera.animate().alpha(alpha).start()
-            toggle_flash.animate().alpha(alpha).start()
-
-            shutter.isClickable = !hide
-            toggle_camera.isClickable = !hide
-            toggle_flash.isClickable = !hide
-        }
-    }
-
     private fun launchSettings() {
         if (settings.alpha == 1f) {
             val intent = Intent(applicationContext, SettingsActivity::class.java)
@@ -324,14 +324,13 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         }
 
         if (mIsVideoCaptureIntent) {
-            mPreview?.tryInitVideoMode()
+            mPreview?.initVideoMode()
         }
 
         mPreview?.setFlashlightState(FLASH_OFF)
         hideTimer()
         mIsInPhotoMode = !mIsInPhotoMode
         config.initPhotoMode = mIsInPhotoMode
-        showToggleCameraIfNeeded()
         checkButtons()
         toggleBottomButtons(false)
     }
@@ -352,9 +351,10 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
     }
 
     private fun tryInitVideoMode() {
-        if (mPreview?.initVideoMode() == true) {
+        try {
+            mPreview?.initVideoMode()
             initVideoButtons()
-        } else {
+        } catch (e: Exception) {
             if (!mIsVideoCaptureIntent) {
                 toast(R.string.video_mode_error)
             }
@@ -363,7 +363,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
 
     private fun initVideoButtons() {
         toggle_photo_video.setImageResource(R.drawable.ic_camera_vector)
-        showToggleCameraIfNeeded()
         shutter.setImageResource(R.drawable.ic_video_rec)
         setupPreviewImage(false)
         mPreview?.checkFlashlight()
@@ -378,6 +377,13 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
 
         mPreviewUri = Uri.withAppendedPath(uri, lastMediaId.toString())
 
+        Log.e(TAG, "mPreviewUri= $mPreviewUri")
+
+        loadLastTakenMedia(mPreviewUri)
+    }
+
+    private fun loadLastTakenMedia(uri: Uri?) {
+        mPreviewUri = uri
         runOnUiThread {
             if (!isDestroyed) {
                 val options = RequestOptions()
@@ -385,7 +391,7 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
                     .diskCacheStrategy(DiskCacheStrategy.NONE)
 
                 Glide.with(this)
-                    .load(mPreviewUri)
+                    .load(uri)
                     .apply(options)
                     .transition(DrawableTransitionOptions.withCrossFade())
                     .into(last_photo_video_preview)
@@ -447,7 +453,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
     }
 
     private fun resumeCameraItems() {
-        showToggleCameraIfNeeded()
         hideNavigationBarIcons()
 
         if (!mIsInPhotoMode) {
@@ -455,10 +460,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         }
     }
 
-    private fun showToggleCameraIfNeeded() {
-        toggle_camera?.beInvisibleIf(mCameraImpl.getCountOfCameras() ?: 1 <= 1)
-    }
-
     private fun hasStorageAndCameraPermissions() = hasPermission(PERMISSION_WRITE_STORAGE) && hasPermission(PERMISSION_CAMERA)
 
     private fun setupOrientationEventListener() {
@@ -505,7 +506,15 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         return mIsCameraAvailable
     }
 
-    fun setFlashAvailable(available: Boolean) {
+    override fun setCameraAvailable(available: Boolean) {
+        mIsCameraAvailable = available
+    }
+
+    override fun setHasFrontAndBackCamera(hasFrontAndBack: Boolean) {
+        toggle_camera?.beVisibleIf(hasFrontAndBack)
+    }
+
+    override fun setFlashAvailable(available: Boolean) {
         if (available) {
             toggle_flash.beVisible()
         } else {
@@ -515,8 +524,29 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
         }
     }
 
-    fun setIsCameraAvailable(available: Boolean) {
-        mIsCameraAvailable = available
+    override fun onChangeCamera(frontCamera: Boolean) {
+        toggle_camera.setImageResource(if (frontCamera) R.drawable.ic_camera_rear_vector else R.drawable.ic_camera_front_vector)
+    }
+
+    override fun toggleBottomButtons(hide: Boolean) {
+        runOnUiThread {
+            val alpha = if (hide) 0f else 1f
+            shutter.animate().alpha(alpha).start()
+            toggle_camera.animate().alpha(alpha).start()
+            toggle_flash.animate().alpha(alpha).start()
+
+            shutter.isClickable = !hide
+            toggle_camera.isClickable = !hide
+            toggle_flash.isClickable = !hide
+        }
+    }
+
+    override fun onMediaCaptured(uri: Uri) {
+        loadLastTakenMedia(uri)
+    }
+
+    override fun onChangeFlashMode(flashMode: Int) {
+        updateFlashlightState(flashMode)
     }
 
     fun setRecordingState(isRecording: Boolean) {
@@ -527,7 +557,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
                 showTimer()
             } else {
                 shutter.setImageResource(R.drawable.ic_video_rec)
-                showToggleCameraIfNeeded()
                 hideTimer()
             }
         }
@@ -548,6 +577,7 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener {
     fun drawFocusCircle(x: Float, y: Float) = mFocusCircleView.drawFocusCircle(x, y)
 
     override fun mediaSaved(path: String) {
+        Log.e(TAG, "mediaSaved: $path")
         rescanPaths(arrayListOf(path)) {
             setupPreviewImage(true)
             Intent(BROADCAST_REFRESH_MEDIA).apply {

app/src/main/kotlin/com/simplemobiletools/camera/extensions/Int.kt

@@ -0,0 +1,25 @@
+package com.simplemobiletools.camera.extensions
+
+import androidx.camera.core.ImageCapture
+import com.simplemobiletools.camera.helpers.FLASH_AUTO
+import com.simplemobiletools.camera.helpers.FLASH_OFF
+import com.simplemobiletools.camera.helpers.FLASH_ON
+import java.lang.IllegalArgumentException
+
+fun Int.toCameraXFlashMode(): Int {
+    return when (this) {
+        FLASH_ON -> ImageCapture.FLASH_MODE_ON
+        FLASH_OFF -> ImageCapture.FLASH_MODE_OFF
+        FLASH_AUTO -> ImageCapture.FLASH_MODE_AUTO
+        else -> throw IllegalArgumentException("Unknown mode: $this")
+    }
+}
+
+fun Int.toAppFlashMode(): Int {
+    return when (this) {
+        ImageCapture.FLASH_MODE_ON -> FLASH_ON
+        ImageCapture.FLASH_MODE_OFF -> FLASH_OFF
+        ImageCapture.FLASH_MODE_AUTO -> FLASH_AUTO
+        else -> throw IllegalArgumentException("Unknown mode: $this")
+    }
+}

app/src/main/kotlin/com/simplemobiletools/camera/implementations/CameraXPreview.kt

@@ -0,0 +1,394 @@
+package com.simplemobiletools.camera.implementations
+
+import android.annotation.SuppressLint
+import android.content.ContentValues
+import android.hardware.SensorManager
+import android.net.Uri
+import android.os.Environment
+import android.provider.MediaStore
+import android.util.Log
+import android.view.OrientationEventListener
+import android.view.Surface
+import androidx.appcompat.app.AppCompatActivity
+import androidx.camera.core.*
+import androidx.camera.core.ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY
+import androidx.camera.core.ImageCapture.FLASH_MODE_AUTO
+import androidx.camera.core.ImageCapture.FLASH_MODE_OFF
+import androidx.camera.core.ImageCapture.FLASH_MODE_ON
+import androidx.camera.core.ImageCapture.Metadata
+import androidx.camera.core.ImageCapture.OnImageSavedCallback
+import androidx.camera.core.ImageCapture.OutputFileOptions
+import androidx.camera.core.ImageCapture.OutputFileResults
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.video.MediaStoreOutputOptions
+import androidx.camera.video.Quality
+import androidx.camera.video.QualitySelector
+import androidx.camera.video.Recorder
+import androidx.camera.video.Recording
+import androidx.camera.video.VideoCapture
+import androidx.camera.video.VideoRecordEvent
+import androidx.camera.view.PreviewView
+import androidx.core.view.doOnLayout
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
+import androidx.window.layout.WindowMetricsCalculator
+import com.bumptech.glide.load.ImageHeaderParser.UNKNOWN_ORIENTATION
+import com.simplemobiletools.camera.R
+import com.simplemobiletools.camera.extensions.config
+import com.simplemobiletools.camera.extensions.toAppFlashMode
+import com.simplemobiletools.camera.extensions.toCameraXFlashMode
+import com.simplemobiletools.camera.interfaces.MyPreview
+import com.simplemobiletools.commons.extensions.showErrorToast
+import com.simplemobiletools.commons.extensions.toast
+import java.lang.IllegalArgumentException
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.min
+
+class CameraXPreview(
+    private val activity: AppCompatActivity,
+    private val viewFinder: PreviewView,
+    private val listener: CameraXPreviewListener,
+) : MyPreview, DefaultLifecycleObserver {
+
+    companion object {
+        private const val TAG = "CameraXPreview"
+        private const val RATIO_4_3_VALUE = 4.0 / 3.0
+        private const val RATIO_16_9_VALUE = 16.0 / 9.0
+    }
+
+    private val config = activity.config
+    private val contentResolver = activity.contentResolver
+    private val mainExecutor = activity.mainExecutor
+    private val windowMetricsCalculator = WindowMetricsCalculator.getOrCreate()
+    private val orientationEventListener = object : OrientationEventListener(activity, SensorManager.SENSOR_DELAY_NORMAL) {
+        @SuppressLint("RestrictedApi")
+        override fun onOrientationChanged(orientation: Int) {
+            if (orientation == UNKNOWN_ORIENTATION) {
+                return
+            }
+
+            val rotation = when (orientation) {
+                in 45 until 135 -> Surface.ROTATION_270
+                in 135 until 225 -> Surface.ROTATION_180
+                in 225 until 315 -> Surface.ROTATION_90
+                else -> Surface.ROTATION_0
+            }
+
+            preview?.targetRotation = rotation
+            imageCapture?.targetRotation = rotation
+            videoCapture?.targetRotation = rotation
+        }
+    }
+
+    private val hasBackCamera: Boolean
+        get() = cameraProvider?.hasCamera(CameraSelector.DEFAULT_BACK_CAMERA) ?: false
+
+    private val hasFrontCamera: Boolean
+        get() = cameraProvider?.hasCamera(CameraSelector.DEFAULT_FRONT_CAMERA) ?: false
+
+    private val cameraCount: Int
+        get() = cameraProvider?.availableCameraInfos?.size ?: 0
+
+    private val frontCameraInUse: Boolean
+        get() = lensFacing == CameraSelector.DEFAULT_FRONT_CAMERA
+
+    private var preview: Preview? = null
+    private var cameraProvider: ProcessCameraProvider? = null
+    private var imageCapture: ImageCapture? = null
+    private var videoCapture: VideoCapture<Recorder>? = null
+    private var camera: Camera? = null
+    private var currentRecording: Recording? = null
+    private var recordingState: VideoRecordEvent? = null
+    private var lensFacing = CameraSelector.DEFAULT_BACK_CAMERA
+    private var flashMode = config.flashlightState.toCameraXFlashMode()
+    private var isPhotoCapture = config.initPhotoMode
+
+    init {
+        bindToLifeCycle()
+        viewFinder.doOnLayout {
+            startCamera()
+        }
+    }
+
+    private fun bindToLifeCycle() {
+        activity.lifecycle.addObserver(this)
+    }
+
+    private fun startCamera() {
+        Log.i(TAG, "startCamera: ")
+        val cameraProviderFuture = ProcessCameraProvider.getInstance(activity)
+        cameraProviderFuture.addListener({
+            try {
+                cameraProvider = cameraProviderFuture.get()
+                bindCameraUseCases()
+                setupCameraObservers()
+            } catch (e: Exception) {
+                Log.e(TAG, "startCamera: ", e)
+                activity.showErrorToast(activity.getString(R.string.camera_open_error))
+            }
+        }, mainExecutor)
+    }
+
+    private fun bindCameraUseCases() {
+        val cameraProvider = cameraProvider ?: throw IllegalStateException("Camera initialization failed.")
+        val metrics = windowMetricsCalculator.computeCurrentWindowMetrics(activity).bounds
+        val aspectRatio = aspectRatio(metrics.width(), metrics.height())
+        val rotation = viewFinder.display.rotation
+
+        preview = buildPreview(aspectRatio, rotation)
+        val captureUseCase = getCaptureUseCase(aspectRatio, rotation)
+        cameraProvider.unbindAll()
+        camera = cameraProvider.bindToLifecycle(
+            activity,
+            lensFacing,
+            preview,
+            captureUseCase,
+        )
+        preview?.setSurfaceProvider(viewFinder.surfaceProvider)
+    }
+
+    private fun setupCameraObservers() {
+        listener.setFlashAvailable(camera?.cameraInfo?.hasFlashUnit() ?: false)
+        listener.onChangeCamera(frontCameraInUse)
+
+        camera?.cameraInfo?.cameraState?.observe(activity) { cameraState ->
+            when (cameraState.type) {
+                CameraState.Type.OPEN,
+                CameraState.Type.OPENING -> {
+                    listener.setHasFrontAndBackCamera(hasFrontCamera && hasBackCamera)
+                    listener.setCameraAvailable(true)
+                }
+                CameraState.Type.PENDING_OPEN,
+                CameraState.Type.CLOSING,
+                CameraState.Type.CLOSED -> {
+                    listener.setCameraAvailable(false)
+                }
+            }
+
+            // TODO: Handle errors
+            cameraState.error?.let { error ->
+                listener.setCameraAvailable(false)
+                when (error.code) {
+                    CameraState.ERROR_STREAM_CONFIG -> {
+                        Log.e(TAG, "ERROR_STREAM_CONFIG")
+                        // Make sure to setup the use cases properly
+                        activity.toast(R.string.camera_unavailable)
+                    }
+                    CameraState.ERROR_CAMERA_IN_USE -> {
+                        Log.e(TAG, "ERROR_CAMERA_IN_USE")
+                        // Close the camera or ask user to close another camera app that's using the
+                        // camera
+                        activity.showErrorToast("Camera is in use by another app, please close")
+                    }
+                    CameraState.ERROR_MAX_CAMERAS_IN_USE -> {
+                        Log.e(TAG, "ERROR_MAX_CAMERAS_IN_USE")
+                        // Close another open camera in the app, or ask the user to close another
+                        // camera app that's using the camera
+                        activity.showErrorToast("Camera is in use by another app, please close")
+                    }
+                    CameraState.ERROR_OTHER_RECOVERABLE_ERROR -> {
+                        Log.e(TAG, "ERROR_OTHER_RECOVERABLE_ERROR")
+                        activity.toast(R.string.camera_open_error)
+                    }
+                    CameraState.ERROR_CAMERA_DISABLED -> {
+                        Log.e(TAG, "ERROR_CAMERA_DISABLED")
+                        // Ask the user to enable the device's cameras
+                        activity.toast(R.string.camera_open_error)
+                    }
+                    CameraState.ERROR_CAMERA_FATAL_ERROR -> {
+                        Log.e(TAG, "ERROR_CAMERA_FATAL_ERROR")
+                        // Ask the user to reboot the device to restore camera function
+                        activity.toast(R.string.camera_open_error)
+                    }
+                    CameraState.ERROR_DO_NOT_DISTURB_MODE_ENABLED -> {
+                        // Ask the user to disable the "Do Not Disturb" mode, then reopen the camera
+                        Log.e(TAG, "ERROR_DO_NOT_DISTURB_MODE_ENABLED")
+                        activity.toast(R.string.camera_open_error)
+                    }
+                }
+            }
+        }
+    }
+
+    private fun getCaptureUseCase(aspectRatio: Int, rotation: Int): UseCase {
+        return if (isPhotoCapture) {
+            buildImageCapture(aspectRatio, rotation).also {
+                imageCapture = it
+            }
+        } else {
+            buildVideoCapture().also {
+                videoCapture = it
+            }
+        }
+    }
+
+    private fun buildImageCapture(aspectRatio: Int, rotation: Int): ImageCapture {
+        return ImageCapture.Builder()
+            .setCaptureMode(CAPTURE_MODE_MAXIMIZE_QUALITY)
+            .setFlashMode(flashMode)
+            .setTargetAspectRatio(aspectRatio)
+            .setTargetRotation(rotation)
+            .build()
+    }
+
+    private fun buildPreview(aspectRatio: Int, rotation: Int): Preview {
+        return Preview.Builder()
+            .setTargetAspectRatio(aspectRatio)
+            .setTargetRotation(rotation)
+            .build()
+    }
+
+    private fun buildVideoCapture(): VideoCapture<Recorder> {
+        val recorder = Recorder.Builder()
+            .setQualitySelector(QualitySelector.from(Quality.FHD))
+            .build()
+        return VideoCapture.withOutput(recorder)
+    }
+
+    private fun aspectRatio(width: Int, height: Int): Int {
+        val previewRatio = max(width, height).toDouble() / min(width, height)
+        if (abs(previewRatio - RATIO_4_3_VALUE) <= abs(previewRatio - RATIO_16_9_VALUE)) {
+            return AspectRatio.RATIO_4_3
+        }
+        return AspectRatio.RATIO_16_9
+    }
+
+    override fun onStart(owner: LifecycleOwner) {
+        orientationEventListener.enable()
+    }
+
+    override fun onStop(owner: LifecycleOwner) {
+        orientationEventListener.disable()
+    }
+
+    override fun setTargetUri(uri: Uri) {
+
+    }
+
+    override fun showChangeResolutionDialog() {
+
+    }
+
+    override fun toggleFrontBackCamera() {
+        lensFacing = if (frontCameraInUse) {
+            CameraSelector.DEFAULT_BACK_CAMERA
+        } else {
+            CameraSelector.DEFAULT_FRONT_CAMERA
+        }
+        startCamera()
+    }
+
+    override fun toggleFlashlight() {
+        val newFlashMode = when (flashMode) {
+            FLASH_MODE_OFF -> FLASH_MODE_ON
+            FLASH_MODE_ON -> FLASH_MODE_AUTO
+            FLASH_MODE_AUTO -> FLASH_MODE_OFF
+            else -> throw IllegalArgumentException("Unknown mode: $flashMode")
+        }
+
+        flashMode = newFlashMode
+        imageCapture?.flashMode = newFlashMode
+        val appFlashMode = flashMode.toAppFlashMode()
+        config.flashlightState = appFlashMode
+        listener.onChangeFlashMode(appFlashMode)
+    }
+
+    override fun tryTakePicture() {
+        Log.i(TAG, "captureImage: ")
+        val imageCapture = imageCapture ?: throw IllegalStateException("Camera initialization failed.")
+
+        val metadata = Metadata().apply {
+            isReversedHorizontal = frontCameraInUse
+        }
+
+        val contentValues = ContentValues().apply {
+            put(MediaStore.MediaColumns.DISPLAY_NAME, getRandomMediaName(true))
+            put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg")
+            put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DCIM)
+        }
+        val contentUri = MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
+        val outputOptions = OutputFileOptions.Builder(contentResolver, contentUri, contentValues)
+            .setMetadata(metadata)
+            .build()
+
+        imageCapture.takePicture(outputOptions, mainExecutor, object : OnImageSavedCallback {
+            override fun onImageSaved(outputFileResults: OutputFileResults) {
+                listener.toggleBottomButtons(false)
+                listener.onMediaCaptured(outputFileResults.savedUri!!)
+            }
+
+            override fun onError(exception: ImageCaptureException) {
+                listener.toggleBottomButtons(false)
+                activity.showErrorToast("Capture picture $exception")
+                Log.e(TAG, "Error", exception)
+            }
+        })
+    }
+
+    override fun initPhotoMode() {
+        isPhotoCapture = true
+        startCamera()
+    }
+
+    override fun initVideoMode() {
+        isPhotoCapture = false
+        startCamera()
+    }
+
+    override fun toggleRecording() {
+        Log.d(TAG, "toggleRecording: currentRecording=$currentRecording, recordingState=$recordingState")
+        if (currentRecording == null || recordingState is VideoRecordEvent.Finalize) {
+            startRecording()
+        } else {
+            currentRecording?.stop()
+            currentRecording = null
+            Log.d(TAG, "Recording stopped")
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    private fun startRecording() {
+        val videoCapture = videoCapture ?: throw IllegalStateException("Camera initialization failed.")
+        val contentValues = ContentValues().apply {
+            put(MediaStore.MediaColumns.DISPLAY_NAME, getRandomMediaName(false))
+            put(MediaStore.MediaColumns.MIME_TYPE, "video/mp4")
+            put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DCIM)
+        }
+        val contentUri = MediaStore.Video.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
+        val outputOptions = MediaStoreOutputOptions.Builder(contentResolver, contentUri)
+            .setContentValues(contentValues)
+            .build()
+
+        currentRecording = videoCapture.output
+            .prepareRecording(activity, outputOptions)
+            .withAudioEnabled()
+            .start(mainExecutor) { recordEvent ->
+                Log.d(TAG, "recordEvent=$recordEvent ")
+                if (recordEvent !is VideoRecordEvent.Status) {
+                    recordingState = recordEvent
+                }
+
+                if (recordEvent is VideoRecordEvent.Finalize) {
+                    if (recordEvent.hasError()) {
+                        // TODO: Handle errors
+                    } else {
+                        listener.onMediaCaptured(recordEvent.outputResults.outputUri)
+                    }
+                }
+            }
+        Log.d(TAG, "Recording started")
+    }
+
+    private fun getRandomMediaName(isPhoto: Boolean): String {
+        val timestamp = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
+        return if (isPhoto) {
+            "IMG_$timestamp"
+        } else {
+            "VID_$timestamp"
+        }
+    }
+}

app/src/main/kotlin/com/simplemobiletools/camera/implementations/CameraXPreviewListener.kt

@@ -0,0 +1,13 @@
+package com.simplemobiletools.camera.implementations
+
+import android.net.Uri
+
+interface CameraXPreviewListener {
+    fun setCameraAvailable(available: Boolean)
+    fun setHasFrontAndBackCamera(hasFrontAndBack:Boolean)
+    fun setFlashAvailable(available: Boolean)
+    fun onChangeCamera(frontCamera: Boolean)
+    fun toggleBottomButtons(hide:Boolean)
+    fun onMediaCaptured(uri: Uri)
+    fun onChangeFlashMode(flashMode: Int)
+}

app/src/main/kotlin/com/simplemobiletools/camera/interfaces/MyPreview.kt

@@ -3,17 +3,18 @@ package com.simplemobiletools.camera.interfaces
 import android.net.Uri
 
 interface MyPreview {
-    fun onResumed()
 
-    fun onPaused()
+    fun onResumed() = Unit
+
+    fun onPaused() = Unit
 
     fun setTargetUri(uri: Uri)
 
-    fun setIsImageCaptureIntent(isImageCaptureIntent: Boolean)
+    fun setIsImageCaptureIntent(isImageCaptureIntent: Boolean) = Unit
 
-    fun setFlashlightState(state: Int)
+    fun setFlashlightState(state: Int) = Unit
 
-    fun getCameraState(): Int
+    fun getCameraState(): Int = 0
 
     fun showChangeResolutionDialog()
 
@@ -25,11 +26,9 @@ interface MyPreview {
 
     fun toggleRecording()
 
-    fun tryInitVideoMode()
-
     fun initPhotoMode()
 
-    fun initVideoMode(): Boolean
+    fun initVideoMode()
 
-    fun checkFlashlight()
+    fun checkFlashlight() = Unit
 }

app/src/main/kotlin/com/simplemobiletools/camera/views/CameraPreview.kt

@@ -369,7 +369,7 @@ class CameraPreview : ViewGroup, TextureView.SurfaceTextureListener, MyPreview {
                     mIsFocusSupported = get(CameraCharacteristics.CONTROL_AF_AVAILABLE_MODES)!!.size > 1
                 }
                 mActivity.setFlashAvailable(mIsFlashSupported)
-                mActivity.updateCameraIcon(mUseFrontCamera)
+                mActivity.onChangeCamera(mUseFrontCamera)
                 return
             }
         } catch (e: Exception) {
@@ -429,21 +429,21 @@ class CameraPreview : ViewGroup, TextureView.SurfaceTextureListener, MyPreview {
             mCameraOpenCloseLock.release()
             mCameraDevice = cameraDevice
             createCameraPreviewSession()
-            mActivity.setIsCameraAvailable(true)
+            mActivity.setCameraAvailable(true)
         }
 
         override fun onDisconnected(cameraDevice: CameraDevice) {
             mCameraOpenCloseLock.release()
             cameraDevice.close()
             mCameraDevice = null
-            mActivity.setIsCameraAvailable(false)
+            mActivity.setCameraAvailable(false)
         }
 
         override fun onError(cameraDevice: CameraDevice, error: Int) {
             mCameraOpenCloseLock.release()
             cameraDevice.close()
             mCameraDevice = null
-            mActivity.setIsCameraAvailable(false)
+            mActivity.setCameraAvailable(false)
         }
     }
 
@@ -981,23 +981,18 @@ class CameraPreview : ViewGroup, TextureView.SurfaceTextureListener, MyPreview {
         }
     }
 
-    override fun tryInitVideoMode() {
-        initVideoMode()
-    }
-
     override fun initPhotoMode() {
         mIsInVideoMode = false
         closeCamera()
         openCamera(mTextureView.width, mTextureView.height)
     }
 
-    override fun initVideoMode(): Boolean {
+    override fun initVideoMode() {
         mLastFocusX = 0f
         mLastFocusY = 0f
         mIsInVideoMode = true
         closeCamera()
         openCamera(mTextureView.width, mTextureView.height)
-        return true
     }
 
     override fun checkFlashlight() {

app/src/main/res/layout/activity_main.xml

@@ -5,10 +5,10 @@
     android:layout_height="match_parent"
     android:background="@android:color/black">
 
-    <com.simplemobiletools.camera.views.AutoFitTextureView
-        android:id="@+id/camera_texture_view"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content" />
+    <androidx.camera.view.PreviewView
+        android:id="@+id/view_finder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
 
     <ImageView
         android:id="@+id/capture_black_screen"