adjust preview based on selected aspect ratio

- set the preview scale type to fitStart
- both the preview and image capture would use the same size
- some other code cleanups to remove unused code / formatting changes

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

@@ -50,8 +50,13 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener, Camera
     private var mCurrVideoRecTimer = 0
     var mLastHandledOrientation = 0
 
-    @Suppress("DEPRECATION")
     override fun onCreate(savedInstanceState: Bundle?) {
+        window.addFlags(
+            WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD or
+                WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED or
+                WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON or
+                WindowManager.LayoutParams.FLAG_FULLSCREEN
+        )
         useDynamicTheme = false
         super.onCreate(savedInstanceState)
         appLaunched(BuildConfig.APPLICATION_ID)
@@ -62,22 +67,6 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener, Camera
         supportActionBar?.hide()
         checkWhatsNewDialog()
         setupOrientationEventListener()
-        if (isRPlus()) {
-            setShowWhenLocked(true)
-            setTurnScreenOn(true)
-            window.insetsController?.hide(WindowInsets.Type.statusBars())
-        } else if (isOreoMr1Plus()) {
-            setShowWhenLocked(true)
-            setTurnScreenOn(true)
-            window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN)
-        } else {
-            window.addFlags(
-                WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD or
-                    WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED or
-                    WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON or
-                    WindowManager.LayoutParams.FLAG_FULLSCREEN
-            )
-        }
     }
 
     override fun onResume() {

app/src/main/kotlin/com/simplemobiletools/camera/helpers/Constants.kt

@@ -15,8 +15,6 @@ const val FLASHLIGHT_STATE = "flashlight_state"
 const val INIT_PHOTO_MODE = "init_photo_mode"
 const val BACK_PHOTO_RESOLUTION_INDEX = "back_photo_resolution_index_2"
 const val BACK_VIDEO_RESOLUTION_INDEX = "back_video_resolution_index_2"
-const val BACK_VIDEO_QUALITY = "back_video_quality_2"
-const val FRONT_VIDEO_QUALITY = "front_video_quality_2"
 const val FRONT_PHOTO_RESOLUTION_INDEX = "front_photo_resolution_index_2"
 const val FRONT_VIDEO_RESOLUTION_INDEX = "front_video_resolution_index_2"
 const val KEEP_SETTINGS_VISIBLE = "keep_settings_visible"

app/src/main/kotlin/com/simplemobiletools/camera/helpers/ImageQualityManager.kt

@@ -4,9 +4,6 @@ import android.content.Context
 import android.graphics.ImageFormat
 import android.hardware.camera2.CameraCharacteristics
 import android.hardware.camera2.CameraManager
-import android.hardware.camera2.params.StreamConfigurationMap
-import android.media.MediaRecorder
-import android.util.Size
 import androidx.appcompat.app.AppCompatActivity
 import androidx.camera.core.CameraSelector
 import com.simplemobiletools.camera.extensions.config
@@ -19,8 +16,6 @@ class ImageQualityManager(
 ) {
 
     companion object {
-        private const val MAX_VIDEO_WIDTH = 4096
-        private const val MAX_VIDEO_HEIGHT = 2160
         private val CAMERA_LENS = arrayOf(CameraCharacteristics.LENS_FACING_FRONT, CameraCharacteristics.LENS_FACING_BACK)
     }
 
@@ -29,6 +24,7 @@ class ImageQualityManager(
     private val imageQualities = mutableListOf<CameraSelectorImageQualities>()
 
     fun initSupportedQualities() {
+        if (imageQualities.isEmpty()) {
             for (cameraId in cameraManager.cameraIdList) {
                 try {
                     val characteristics = cameraManager.getCameraCharacteristics(cameraId)
@@ -45,11 +41,6 @@ class ImageQualityManager(
                 }
             }
         }
-
-    private fun getAvailableVideoSizes(configMap: StreamConfigurationMap): List<Size> {
-        return configMap.getOutputSizes(MediaRecorder::class.java).filter {
-            it.width <= MAX_VIDEO_WIDTH && it.height <= MAX_VIDEO_HEIGHT
-        }
     }
 
     private fun Int.toCameraSelector(): CameraSelector {
@@ -60,20 +51,19 @@ class ImageQualityManager(
         }
     }
 
-    fun getUserSelectedResolution(cameraSelector: CameraSelector): Size? {
+    fun getUserSelectedResolution(cameraSelector: CameraSelector): MySize {
         val index = if (cameraSelector == CameraSelector.DEFAULT_FRONT_CAMERA) config.frontPhotoResIndex else config.backPhotoResIndex
         return imageQualities.filter { it.camSelector == cameraSelector }
             .flatMap { it.qualities }
-            .sortedByDescending { it.pixels }
+            .sortedWith(compareByDescending<MySize> { it.ratio }.thenByDescending { it.pixels })
             .distinctBy { it.pixels }
-            .map { Size(it.width, it.height) }
+            .filter { it.megaPixels != "0.0" }[index]
-            .getOrNull(index)
     }
 
     fun getSupportedResolutions(cameraSelector: CameraSelector): List<MySize> {
         return imageQualities.filter { it.camSelector == cameraSelector }
             .flatMap { it.qualities }
-            .sortedByDescending { it.pixels }
+            .sortedWith(compareByDescending<MySize> { it.ratio }.thenByDescending { it.pixels })
             .distinctBy { it.pixels }
             .filter { it.megaPixels != "0.0" }
     }

app/src/main/kotlin/com/simplemobiletools/camera/helpers/VideoQualityManager.kt

@@ -6,7 +6,6 @@ import androidx.camera.lifecycle.ProcessCameraProvider
 import androidx.camera.video.Quality
 import androidx.camera.video.QualitySelector
 import com.simplemobiletools.camera.extensions.config
-import com.simplemobiletools.camera.extensions.toCameraXQuality
 import com.simplemobiletools.camera.extensions.toVideoQuality
 import com.simplemobiletools.camera.models.CameraSelectorVideoQualities
 import com.simplemobiletools.camera.models.VideoQuality
@@ -45,10 +44,10 @@ class VideoQualityManager(
         }
     }
 
-    fun getUserSelectedQuality(cameraSelector: CameraSelector): Quality {
+    fun getUserSelectedQuality(cameraSelector: CameraSelector): VideoQuality {
         var selectionIndex = if (cameraSelector == CameraSelector.DEFAULT_FRONT_CAMERA) config.frontVideoResIndex else config.backVideoResIndex
         selectionIndex = selectionIndex.coerceAtLeast(0)
-        return getSupportedQualities(cameraSelector).getOrElse(selectionIndex) { VideoQuality.HD }.toCameraXQuality()
+        return getSupportedQualities(cameraSelector).getOrElse(selectionIndex) { VideoQuality.HD }
     }
 
     fun getSupportedQualities(cameraSelector: CameraSelector): List<VideoQuality> {

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

@@ -18,7 +18,6 @@ import androidx.core.content.ContextCompat
 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.dialogs.ChangeResolutionDialogX
@@ -26,11 +25,9 @@ import com.simplemobiletools.camera.extensions.*
 import com.simplemobiletools.camera.helpers.*
 import com.simplemobiletools.camera.interfaces.MyPreview
 import com.simplemobiletools.camera.models.MediaOutput
+import com.simplemobiletools.camera.models.MySize
 import com.simplemobiletools.commons.extensions.toast
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
-import kotlin.math.abs
-import kotlin.math.max
-import kotlin.math.min
 
 class CameraXPreview(
     private val activity: AppCompatActivity,
@@ -42,9 +39,6 @@ class CameraXPreview(
 ) : MyPreview, DefaultLifecycleObserver {
 
     companion object {
-        private const val RATIO_4_3_VALUE = 4.0 / 3.0
-        private const val RATIO_16_9_VALUE = 16.0 / 9.0
-
         // Auto focus is 1/6 of the area.
         private const val AF_SIZE = 1.0f / 6.0f
         private const val AE_SIZE = AF_SIZE * 1.5f
@@ -55,7 +49,6 @@ class CameraXPreview(
     private val mainExecutor = ContextCompat.getMainExecutor(activity)
     private val displayManager = activity.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager
     private val mediaSoundHelper = MediaSoundHelper()
-    private val windowMetricsCalculator = WindowMetricsCalculator.getOrCreate()
     private val videoQualityManager = VideoQualityManager(activity)
     private val imageQualityManager = ImageQualityManager(activity)
     private val exifRemover = ExifRemover(contentResolver)
@@ -73,9 +66,13 @@ class CameraXPreview(
                 in 225 until 315 -> Surface.ROTATION_90
                 else -> Surface.ROTATION_0
             }
+
+            if (lastRotation != rotation) {
                 preview?.targetRotation = rotation
                 imageCapture?.targetRotation = rotation
                 videoCapture?.targetRotation = rotation
+                lastRotation = rotation
+            }
         }
     }
 
@@ -89,6 +86,7 @@ class CameraXPreview(
     private var cameraSelector = config.lastUsedCameraLens.toCameraSelector()
     private var flashMode = FLASH_MODE_OFF
     private var isPhotoCapture = initInPhotoMode
+    private var lastRotation = 0
 
     init {
         bindToLifeCycle()
@@ -122,17 +120,18 @@ class CameraXPreview(
 
     private fun bindCameraUseCases() {
         val cameraProvider = cameraProvider ?: throw IllegalStateException("Camera initialization failed.")
-        val metrics = windowMetricsCalculator.computeCurrentWindowMetrics(activity).bounds
+        val rotation = previewView.display.rotation
-        val aspectRatio = if (isPhotoCapture) {
+        val resolution = if (isPhotoCapture) {
-            aspectRatio(metrics.width(), metrics.height())
+            imageQualityManager.getUserSelectedResolution(cameraSelector)
         } else {
             val selectedQuality = videoQualityManager.getUserSelectedQuality(cameraSelector)
-            selectedQuality.getAspectRatio()
+            MySize(selectedQuality.width, selectedQuality.height)
         }
-        val rotation = previewView.display.rotation
 
-        preview = buildPreview(aspectRatio, rotation)
+        val rotatedResolution = getRotatedResolution(resolution, rotation)
-        val captureUseCase = getCaptureUseCase(aspectRatio, rotation)
+
+        preview = buildPreview(rotatedResolution, rotation)
+        val captureUseCase = getCaptureUseCase(rotatedResolution, rotation)
         cameraProvider.unbindAll()
         camera = cameraProvider.bindToLifecycle(
             activity,
@@ -167,10 +166,10 @@ class CameraXPreview(
         }
     }
 
-    private fun getCaptureUseCase(aspectRatio: Int, rotation: Int): UseCase {
+    private fun getCaptureUseCase(resolution: Size, rotation: Int): UseCase {
         return if (isPhotoCapture) {
             cameraProvider?.unbind(videoCapture)
-            buildImageCapture(aspectRatio, rotation).also {
+            buildImageCapture(resolution, rotation).also {
                 imageCapture = it
             }
         } else {
@@ -181,22 +180,17 @@ class CameraXPreview(
         }
     }
 
-    private fun buildImageCapture(aspectRatio: Int, rotation: Int): ImageCapture {
+    private fun buildImageCapture(resolution: Size, rotation: Int): ImageCapture {
         return Builder()
             .setCaptureMode(CAPTURE_MODE_MAXIMIZE_QUALITY)
             .setFlashMode(flashMode)
             .setJpegQuality(config.photoQuality)
             .setTargetRotation(rotation)
-            .apply {
+            .setTargetResolution(resolution)
-                imageQualityManager.getUserSelectedResolution(cameraSelector)?.let { resolution ->
-                    val rotatedResolution = getRotatedResolution(rotation, resolution)
-                    setTargetResolution(rotatedResolution)
-                } ?: setTargetAspectRatio(aspectRatio)
-            }
             .build()
     }
 
-    private fun getRotatedResolution(rotationDegrees: Int, resolution: Size): Size {
+    private fun getRotatedResolution(resolution: MySize, rotationDegrees: Int): Size {
         return if (rotationDegrees == Surface.ROTATION_0 || rotationDegrees == Surface.ROTATION_180) {
             Size(resolution.height, resolution.width)
         } else {
@@ -204,16 +198,16 @@ class CameraXPreview(
         }
     }
 
-    private fun buildPreview(aspectRatio: Int, rotation: Int): Preview {
+    private fun buildPreview(resolution: Size, rotation: Int): Preview {
         return Preview.Builder()
             .setTargetRotation(rotation)
-            .setTargetAspectRatio(aspectRatio)
+            .setTargetResolution(resolution)
             .build()
     }
 
     private fun buildVideoCapture(): VideoCapture<Recorder> {
         val qualitySelector = QualitySelector.from(
-            videoQualityManager.getUserSelectedQuality(cameraSelector),
+            videoQualityManager.getUserSelectedQuality(cameraSelector).toCameraXQuality(),
             FallbackStrategy.higherQualityOrLowerThan(Quality.SD),
         )
         val recorder = Recorder.Builder()
@@ -222,14 +216,6 @@ class CameraXPreview(
         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
-    }
-
     private fun hasBackCamera(): Boolean {
         return cameraProvider?.hasCamera(CameraSelector.DEFAULT_BACK_CAMERA) ?: false
     }
@@ -288,7 +274,7 @@ class CameraXPreview(
             activity,
             isFrontCameraInUse(),
             imageQualityManager.getSupportedResolutions(cameraSelector),
-            videoQualityManager.getSupportedQualities(cameraSelector)
+            videoQualityManager.getSupportedQualities(cameraSelector),
         ) {
             if (oldQuality != videoQualityManager.getUserSelectedQuality(cameraSelector)) {
                 currentRecording?.stop()

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/view_holder"
     android:layout_width="match_parent"
@@ -9,7 +10,8 @@
     <androidx.camera.view.PreviewView
         android:id="@+id/preview_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        app:scaleType="fitStart" />
 
     <View
         android:id="@+id/capture_black_screen"

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/change_resolution_holder"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -20,17 +19,15 @@
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
             android:layout_toStartOf="@+id/change_resolution_photo"
-            android:layout_toLeftOf="@+id/change_resolution_photo"
+            android:text="@string/photo" />
-            android:text="@string/photo"/>
 
         <com.simplemobiletools.commons.views.MyTextView
             android:id="@+id/change_resolution_photo"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:background="@null"
-            android:clickable="false"/>
+            android:clickable="false" />
 
     </RelativeLayout>
 
@@ -48,17 +45,15 @@
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
             android:layout_toStartOf="@+id/change_resolution_video"
-            android:layout_toLeftOf="@+id/change_resolution_video"
+            android:text="@string/video" />
-            android:text="@string/video"/>
 
         <com.simplemobiletools.commons.views.MyTextView
             android:id="@+id/change_resolution_video"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:background="@null"
-            android:clickable="false"/>
+            android:clickable="false" />
 
     </RelativeLayout>
 </LinearLayout>