[ios] link missing files

android/app/src/main/kotlin/com/vodemn/lightmeter/MainActivity.kt

@@ -2,20 +2,17 @@ package com.vodemn.lightmeter
 
 import android.os.Bundle
 import android.view.KeyEvent
-import android.view.WindowManager
 import androidx.core.view.WindowCompat
+import com.vodemn.lightmeter.PlatformChannels.CaffeinePlatformChannel
+import com.vodemn.lightmeter.PlatformChannels.CameraInfoPlatformChannel
+import com.vodemn.lightmeter.PlatformChannels.VolumePlatformChannel
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugin.common.EventChannel
-import io.flutter.plugin.common.EventChannel.EventSink
-import io.flutter.plugin.common.MethodChannel
 
 class MainActivity : FlutterActivity() {
-    private lateinit var keepScreenOnChannel: MethodChannel
+    private val caffeinePlatformChannel = CaffeinePlatformChannel()
-    private lateinit var volumeHandlingChannel: MethodChannel
+    private val cameraInfoPlatformChannel = CameraInfoPlatformChannel()
-    private lateinit var volumeEventChannel: EventChannel
+    private val volumePlatformChannel = VolumePlatformChannel()
-    private var volumeEventsEmitter: EventSink? = null
-    private var handleVolume = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -24,72 +21,24 @@ class MainActivity : FlutterActivity() {
 
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
-        keepScreenOnChannel = MethodChannel(
+        val binaryMessenger = flutterEngine.dartExecutor.binaryMessenger
-            flutterEngine.dartExecutor.binaryMessenger,
+        caffeinePlatformChannel.onAttachedToEngine(binaryMessenger, window)
-            "com.vodemn.lightmeter/keepScreenOn"
+        cameraInfoPlatformChannel.onAttachedToEngine(binaryMessenger, context)
-        )
+        volumePlatformChannel.onAttachedToEngine(binaryMessenger)
-        keepScreenOnChannel.setMethodCallHandler { call, result ->
-            when (call.method) {
-                "isKeepScreenOn" -> result.success((window.attributes.flags and WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON) != 0)
-                "setKeepScreenOn" -> {
-                    if (call.arguments !is Boolean) {
-                        result.error("invalid args", "Argument should be of type Bool for 'setKeepScreenOn' call", null)
-                    } else {
-                        if (call.arguments as Boolean) window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
-                        else window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
-                        result.success(true)
-                    }
-                }
-                else -> result.notImplemented()
-            }
-        }
-
-        volumeHandlingChannel = MethodChannel(
-            flutterEngine.dartExecutor.binaryMessenger,
-            "com.vodemn.lightmeter/volumeHandling"
-        )
-        volumeHandlingChannel.setMethodCallHandler { call, result ->
-            when (call.method) {
-                "setVolumeHandling" -> {
-                    handleVolume = call.arguments as Boolean
-                    result.success(handleVolume)
-                }
-                else -> result.notImplemented()
-            }
-        }
-
-        volumeEventChannel = EventChannel(
-            flutterEngine.dartExecutor.binaryMessenger,
-            "com.vodemn.lightmeter/volumeEvents"
-        )
-        volumeEventChannel.setStreamHandler(object : EventChannel.StreamHandler {
-            override fun onListen(listener: Any?, eventSink: EventSink) {
-                volumeEventsEmitter = eventSink
-            }
-            override fun onCancel(listener: Any?) {
-                volumeEventsEmitter = null
-            }
-        })
     }
 
     override fun onDestroy() {
-        keepScreenOnChannel.setMethodCallHandler(null)
+        caffeinePlatformChannel.onDestroy()
-        volumeHandlingChannel.setMethodCallHandler(null)
+        cameraInfoPlatformChannel.onDestroy()
-        volumeEventChannel.setStreamHandler(null)
+        volumePlatformChannel.onDestroy()
         super.onDestroy()
     }
 
     override fun onKeyDown(code: Int, event: KeyEvent): Boolean {
-        return when (val keyCode: Int = event.keyCode) {
+        return if (volumePlatformChannel.onKeyDown(code, event)) {
-            KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_DOWN -> {
+            true
-                if (handleVolume) {
+        } else {
-                    volumeEventsEmitter?.success(keyCode)
+            super.onKeyDown(code, event)
-                    true
-                } else {
-                    super.onKeyDown(code, event)
-                }
-            }
-            else -> super.onKeyDown(code, event)
         }
     }
 }

android/app/src/main/kotlin/com/vodemn/lightmeter/PlatformChannels/CaffeinePlatformChannel.kt

@@ -0,0 +1,42 @@
+package com.vodemn.lightmeter.PlatformChannels
+
+import android.view.Window
+import android.view.WindowManager
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
+
+/** CaffeinePlatformChannel */
+class CaffeinePlatformChannel {
+    private lateinit var channel: MethodChannel
+
+    fun onAttachedToEngine(binaryMessenger: BinaryMessenger, window: Window) {
+        channel = MethodChannel(
+            binaryMessenger,
+            "com.vodemn.lightmeter.CaffeinePlatformChannel.MethodChannel"
+        )
+        channel.setMethodCallHandler { call, result ->
+            when (call.method) {
+                "isKeepScreenOn" -> result.success((window.attributes.flags and WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON) != 0)
+                "setKeepScreenOn" -> {
+                    if (call.arguments !is Boolean) {
+                        result.error(
+                            "invalid args",
+                            "Argument should be of type Bool for 'setKeepScreenOn' call",
+                            null
+                        )
+                    } else {
+                        if (call.arguments as Boolean) window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+                        else window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+                        result.success(true)
+                    }
+                }
+
+                else -> result.notImplemented()
+            }
+        }
+    }
+
+    fun onDestroy() {
+        channel.setMethodCallHandler(null)
+    }
+}

android/app/src/main/kotlin/com/vodemn/lightmeter/PlatformChannels/CameraInfoPlatformChannel.kt

@@ -0,0 +1,59 @@
+package com.vodemn.lightmeter.PlatformChannels
+
+import android.content.Context
+import android.hardware.camera2.CameraCharacteristics
+import android.hardware.camera2.CameraManager
+import android.hardware.camera2.CameraMetadata.LENS_FACING_BACK
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodChannel
+import kotlin.math.pow
+import kotlin.math.sqrt
+
+/** CameraInfoPlatformChannel */
+class CameraInfoPlatformChannel {
+    private lateinit var channel: MethodChannel
+    private lateinit var cameraManager: CameraManager
+    private var mainCameraEfl: Double? = null
+
+    fun onAttachedToEngine(binaryMessenger: BinaryMessenger, context: Context) {
+        channel = MethodChannel(
+            binaryMessenger,
+            "com.vodemn.lightmeter.CameraInfoPlatformChannel.MethodChannel"
+        )
+        cameraManager = context.getSystemService(Context.CAMERA_SERVICE) as CameraManager
+        channel.setMethodCallHandler { call, result ->
+            when (call.method) {
+                "mainCameraEfl" -> {
+                    mainCameraEfl = mainCameraEfl ?: getMainCameraFocalLength35mm()
+                    result.success(mainCameraEfl)
+                }
+
+                else -> result.notImplemented()
+            }
+        }
+    }
+
+    fun onDestroy() {
+        channel.setMethodCallHandler(null)
+    }
+
+    private fun getMainCameraFocalLength35mm(): Double? {
+        return cameraManager.cameraIdList.map {
+            cameraManager.getCameraCharacteristics(it)
+        }.first {
+            it.get(CameraCharacteristics.LENS_FACING) == LENS_FACING_BACK
+        }.focalLength35mm()
+    }
+
+    private fun CameraCharacteristics.focalLength35mm(): Double? {
+        val defaultFocalLength =
+            get(CameraCharacteristics.LENS_INFO_AVAILABLE_FOCAL_LENGTHS)?.first()
+        val sensorSize = get(CameraCharacteristics.SENSOR_INFO_PHYSICAL_SIZE)
+        return if (defaultFocalLength != null && sensorSize != null) {
+            // https://en.wikipedia.org/wiki/35_mm_equivalent_focal_length#Conversions
+            43.27 * defaultFocalLength / sqrt(sensorSize.height.pow(2) + sensorSize.width.pow(2))
+        } else {
+            null
+        }
+    }
+}

android/app/src/main/kotlin/com/vodemn/lightmeter/PlatformChannels/VolumePlatformChannel.kt

@@ -0,0 +1,66 @@
+package com.vodemn.lightmeter.PlatformChannels
+
+import android.view.KeyEvent
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.EventChannel.EventSink
+import io.flutter.plugin.common.MethodChannel
+
+/** VolumePlatformChannel */
+class VolumePlatformChannel {
+    private lateinit var volumeMethodChannel: MethodChannel
+    private lateinit var volumeEventChannel: EventChannel
+    private var volumeEventsEmitter: EventSink? = null
+    private var handleVolume = false
+
+    fun onAttachedToEngine(binaryMessenger: BinaryMessenger) {
+        volumeMethodChannel = MethodChannel(
+            binaryMessenger,
+            "com.vodemn.lightmeter.VolumePlatformChannel.MethodChannel"
+        )
+        volumeMethodChannel.setMethodCallHandler { call, result ->
+            when (call.method) {
+                "setVolumeHandling" -> {
+                    handleVolume = call.arguments as Boolean
+                    result.success(handleVolume)
+                }
+
+                else -> result.notImplemented()
+            }
+        }
+
+        volumeEventChannel = EventChannel(
+            binaryMessenger,
+            "com.vodemn.lightmeter.VolumePlatformChannel.EventChannel"
+        )
+        volumeEventChannel.setStreamHandler(object : EventChannel.StreamHandler {
+            override fun onListen(listener: Any?, eventSink: EventSink) {
+                volumeEventsEmitter = eventSink
+            }
+
+            override fun onCancel(listener: Any?) {
+                volumeEventsEmitter = null
+            }
+        })
+    }
+
+    fun onDestroy() {
+        volumeMethodChannel.setMethodCallHandler(null)
+        volumeEventChannel.setStreamHandler(null)
+    }
+
+    fun onKeyDown(code: Int, event: KeyEvent): Boolean {
+        return when (val keyCode: Int = event.keyCode) {
+            KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_DOWN -> {
+                if (handleVolume) {
+                    volumeEventsEmitter?.success(keyCode)
+                    true
+                } else {
+                    false
+                }
+            }
+
+            else -> false
+        }
+    }
+}

ios/Runner.xcodeproj/project.pbxproj

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		001BDA042DD1252B00122957 /* CameraInfoPlatformChannel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 001BDA022DD0BBA700122957 /* CameraInfoPlatformChannel.swift */; };
+		0035E99F2DD0B07C0053508B /* CaffeinePlatformChannel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0035E99E2DD0B0700053508B /* CaffeinePlatformChannel.swift */; };
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
 		5A1AF02F1E4619A6E479AA8B /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = C991C89D5763E562E77E475E /* Pods_Runner.framework */; };
@@ -31,6 +33,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		001BDA022DD0BBA700122957 /* CameraInfoPlatformChannel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CameraInfoPlatformChannel.swift; sourceTree = "<group>"; };
+		0035E99E2DD0B0700053508B /* CaffeinePlatformChannel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CaffeinePlatformChannel.swift; sourceTree = "<group>"; };
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		2913B1E428DD3F7921E898BC /* GoogleService-Info.plist */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.plist.xml; name = "GoogleService-Info.plist"; path = "Runner/GoogleService-Info.plist"; sourceTree = "<group>"; };
@@ -69,6 +73,15 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		0035E99D2DD0B05F0053508B /* PlatformChannels */ = {
+			isa = PBXGroup;
+			children = (
+				0035E99E2DD0B0700053508B /* CaffeinePlatformChannel.swift */,
+				001BDA022DD0BBA700122957 /* CameraInfoPlatformChannel.swift */,
+			);
+			path = PlatformChannels;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -110,6 +123,7 @@
 				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
 				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
 				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				0035E99D2DD0B05F0053508B /* PlatformChannels */,
 				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
 			);
 			path = Runner;
@@ -156,7 +170,7 @@
 				45F53C083F2EA48EF231DA16 /* [CP] Embed Pods Frameworks */,
 				FF00F85CE432774850A0EDB7 /* [firebase_crashlytics] Crashlytics Upload Symbols */,
 				08127035D2CDEEEBA66FCDBB /* [CP] Copy Pods Resources */,
-				051083B0AECD5071E5FA2A6F /* FlutterFire: "flutterfire upload-crashlytics-symbols" */,
+				58ED09C740BAF94D922BAC2C /* FlutterFire: "flutterfire upload-crashlytics-symbols" */,
 			);
 			buildRules = (
 			);
@@ -216,24 +230,6 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		051083B0AECD5071E5FA2A6F /* FlutterFire: "flutterfire upload-crashlytics-symbols" */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputFileListPaths = (
-			);
-			inputPaths = (
-			);
-			name = "FlutterFire: \"flutterfire upload-crashlytics-symbols\"";
-			outputFileListPaths = (
-			);
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\n#!/bin/bash\nPATH=\"${PATH}:$FLUTTER_ROOT/bin:$HOME/.pub-cache/bin\"\nflutterfire upload-crashlytics-symbols --upload-symbols-script-path=\"$PODS_ROOT/FirebaseCrashlytics/upload-symbols\" --platform=ios --apple-project-path=\"${SRCROOT}\" --env-platform-name=\"${PLATFORM_NAME}\" --env-configuration=\"${CONFIGURATION}\" --env-project-dir=\"${PROJECT_DIR}\" --env-built-products-dir=\"${BUILT_PRODUCTS_DIR}\" --env-dwarf-dsym-folder-path=\"${DWARF_DSYM_FOLDER_PATH}\" --env-dwarf-dsym-file-name=\"${DWARF_DSYM_FILE_NAME}\" --env-infoplist-path=\"${INFOPLIST_PATH}\" --default-config=default\n";
-		};
 		08127035D2CDEEEBA66FCDBB /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -306,6 +302,24 @@
 			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
+		58ED09C740BAF94D922BAC2C /* FlutterFire: "flutterfire upload-crashlytics-symbols" */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 8;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = "FlutterFire: \"flutterfire upload-crashlytics-symbols\"";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 1;
+			shellPath = /bin/sh;
+			shellScript = "\n#!/bin/bash\nPATH=\"${PATH}:$FLUTTER_ROOT/bin:$HOME/.pub-cache/bin\"\nflutterfire upload-crashlytics-symbols --upload-symbols-script-path=\"$PODS_ROOT/FirebaseCrashlytics/upload-symbols\" --platform=ios --apple-project-path=\"${SRCROOT}\" --env-platform-name=\"${PLATFORM_NAME}\" --env-configuration=\"${CONFIGURATION}\" --env-project-dir=\"${PROJECT_DIR}\" --env-built-products-dir=\"${BUILT_PRODUCTS_DIR}\" --env-dwarf-dsym-folder-path=\"${DWARF_DSYM_FOLDER_PATH}\" --env-dwarf-dsym-file-name=\"${DWARF_DSYM_FILE_NAME}\" --env-infoplist-path=\"${INFOPLIST_PATH}\" --default-config=default\n";
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
@@ -319,7 +333,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build\n";
 		};
 		FF00F85CE432774850A0EDB7 /* [firebase_crashlytics] Crashlytics Upload Symbols */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -352,6 +366,8 @@
 			buildActionMask = 2147483647;
 			files = (
 				74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */,
+				001BDA042DD1252B00122957 /* CameraInfoPlatformChannel.swift in Sources */,
+				0035E99F2DD0B07C0053508B /* CaffeinePlatformChannel.swift in Sources */,
 				1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -603,11 +619,9 @@
 				CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
-				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Distribution";
+				CODE_SIGN_STYLE = Automatic;
-				CODE_SIGN_STYLE = Manual;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = 489Z6UQMGN;
-				"DEVELOPMENT_TEAM[sdk=iphoneos*]" = 489Z6UQMGN;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Lightmeter;
@@ -619,7 +633,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.vodemn.lightmeter;
 				PRODUCT_NAME = Lightmeter;
 				PROVISIONING_PROFILE_SPECIFIER = "";
-				"PROVISIONING_PROFILE_SPECIFIER[sdk=iphoneos*]" = "Lightmeter Distribution";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";

ios/Runner/AppDelegate.swift

@@ -8,25 +8,8 @@ import Flutter
         didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
     ) -> Bool {
         let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
-        let keepScreenOnChannel = FlutterMethodChannel(name: "com.vodemn.lightmeter/keepScreenOn",
+        let caffeinePlatformChannel = CaffeinePlatformChannel(binaryMessenger: controller.binaryMessenger)
-                                                  binaryMessenger: controller.binaryMessenger)
+        let cameraInfoPlatformChannel = CameraInfoPlatformChannel(binaryMessenger: controller.binaryMessenger)
-        keepScreenOnChannel.setMethodCallHandler({
-          (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
-            switch call.method {
-                case "isKeepScreenOn":
-                    result(UIApplication.shared.isIdleTimerDisabled)
-                case "setKeepScreenOn":
-                    guard let keepOn = call.arguments as? Bool else {
-                        result(FlutterError(code: "invalid arguments", message: "Argument should be of type Bool for 'setKeepScreenOn' call", details: nil))
-                        return
-                    }
-                    UIApplication.shared.isIdleTimerDisabled = keepOn
-                    result(true)
-                default:
-                    result(FlutterMethodNotImplemented)
-            }
-        })
-        
         GeneratedPluginRegistrant.register(with: self)
         return super.application(application, didFinishLaunchingWithOptions: launchOptions)
     }

ios/Runner/PlatformChannels/CaffeinePlatformChannel.swift

@@ -0,0 +1,35 @@
+//
+//  CaffeinePlatformChannel.swift
+//  Runner
+//
+//  Created by Vadim Turko on 2025-05-11.
+//
+import Flutter
+
+public class CaffeinePlatformChannel: NSObject {
+    let methodChannel: FlutterMethodChannel
+    
+    init(binaryMessenger: FlutterBinaryMessenger) {
+        self.methodChannel = FlutterMethodChannel(
+            name: "com.vodemn.lightmeter.CaffeinePlatformChannel.MethodChannel",
+            binaryMessenger: binaryMessenger
+        )
+        super.init()
+        methodChannel.setMethodCallHandler({
+          (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
+            switch call.method {
+                case "isKeepScreenOn":
+                    result(UIApplication.shared.isIdleTimerDisabled)
+                case "setKeepScreenOn":
+                    guard let keepOn = call.arguments as? Bool else {
+                        result(FlutterError(code: "invalid arguments", message: "Argument should be of type Bool for 'setKeepScreenOn' call", details: nil))
+                        return
+                    }
+                    UIApplication.shared.isIdleTimerDisabled = keepOn
+                    result(true)
+                default:
+                    result(FlutterMethodNotImplemented)
+            }
+        })
+    }
+}

ios/Runner/PlatformChannels/CameraInfoPlatformChannel.swift

@@ -0,0 +1,45 @@
+//
+//  CameraInfoPlatformChannel.swift
+//  Runner
+//
+//  Created by Vadim Turko on 2025-05-11.
+//
+import AVFoundation
+import Flutter
+
+public class CameraInfoPlatformChannel: NSObject {
+    let methodChannel: FlutterMethodChannel
+    
+    init(binaryMessenger: FlutterBinaryMessenger) {
+        self.methodChannel = FlutterMethodChannel(
+            name: "com.vodemn.lightmeter.CameraInfoPlatformChannel.MethodChannel",
+            binaryMessenger: binaryMessenger
+        )
+        super.init()
+        methodChannel.setMethodCallHandler({
+          (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
+            switch call.method {
+                case "mainCameraEfl":
+                    if let device = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back) {
+                        result(self.get35mmEquivalentFocalLength(format: device.activeFormat))
+                    } else {
+                        result(nil)
+                    }
+                default:
+                    result(FlutterMethodNotImplemented)
+            }
+        })
+    }
+    
+    func get35mmEquivalentFocalLength(format : AVCaptureDevice.Format) -> Float {
+        // get reported field of view. Documentation says this is the horizontal field of view
+        var fov = format.videoFieldOfView
+        // convert to radians
+        fov *= Float.pi/180.0
+        // angle and opposite of right angle triangle are half the fov and half the width of
+        // 35mm film (ie 18mm). The adjacent value of the right angle triangle is the equivalent
+        // focal length. Using some right angle triangle math you can work out focal length
+        let focalLen = 18 / tan(fov/2)
+        return focalLen
+    }
+}

lib/application_wrapper.dart

@@ -5,6 +5,7 @@ import 'package:flutter_native_splash/flutter_native_splash.dart';
 import 'package:lightmeter/data/analytics/analytics.dart';
 import 'package:lightmeter/data/analytics/api/analytics_firebase.dart';
 import 'package:lightmeter/data/caffeine_service.dart';
+import 'package:lightmeter/data/camera_info_service.dart';
 import 'package:lightmeter/data/haptics_service.dart';
 import 'package:lightmeter/data/light_sensor_service.dart';
 import 'package:lightmeter/data/permissions_service.dart';
@@ -99,11 +100,13 @@ class _ApplicationWrapperState extends State<ApplicationWrapper> {
     await Future.wait([
       SharedPreferences.getInstance(),
       const LightSensorService(LocalPlatform()).hasSensor(),
+      const CameraInfoService().mainCameraEfl(),
       remoteConfigService.activeAndFetchFeatures(),
       equipmentProfilesStorageService.init(),
       filmsStorageService.init(),
     ]).then((value) {
-      userPreferencesService = UserPreferencesService((value[0] as SharedPreferences?)!);
+      userPreferencesService = UserPreferencesService((value[0] as SharedPreferences?)!)
+        ..cameraFocalLength = value[2] as int?;
       hasLightSensor = value[1] as bool? ?? false;
     });
   }

lib/data/caffeine_service.dart

@@ -1,15 +1,17 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
 
 class CaffeineService {
-  static const _methodChannel = MethodChannel("com.vodemn.lightmeter/keepScreenOn");
+  @visibleForTesting
+  static const caffeineMethodChannel = MethodChannel("com.vodemn.lightmeter.CaffeinePlatformChannel.MethodChannel");
 
   const CaffeineService();
 
   Future<bool> isKeepScreenOn() async {
-    return _methodChannel.invokeMethod<bool>("isKeepScreenOn").then((value) => value!);
+    return caffeineMethodChannel.invokeMethod<bool>("isKeepScreenOn").then((value) => value!);
   }
 
   Future<bool> keepScreenOn(bool keep) async {
-    return _methodChannel.invokeMethod<bool>("setKeepScreenOn", keep).then((value) => value!);
+    return caffeineMethodChannel.invokeMethod<bool>("setKeepScreenOn", keep).then((value) => value!);
   }
 }

lib/data/camera_info_service.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+
+class CameraInfoService {
+  @visibleForTesting
+  static const cameraInfoPlatformChannel = MethodChannel(
+    "com.vodemn.lightmeter.CameraInfoPlatformChannel.MethodChannel",
+  );
+
+  const CameraInfoService();
+
+  Future<int?> mainCameraEfl() async {
+    final focalLength = await cameraInfoPlatformChannel.invokeMethod<double?>('mainCameraEfl');
+    return focalLength?.round();
+  }
+}

lib/data/volume_events_service.dart

@@ -6,10 +6,10 @@ class VolumeEventsService {
   final LocalPlatform _localPlatform;
 
   @visibleForTesting
-  static const volumeHandlingChannel = MethodChannel("com.vodemn.lightmeter/volumeHandling");
+  static const volumeMethodChannel = MethodChannel("com.vodemn.lightmeter.VolumePlatformChannel.MethodChannel");
 
   @visibleForTesting
-  static const volumeEventsChannel = EventChannel("com.vodemn.lightmeter/volumeEvents");
+  static const volumeEventsChannel = EventChannel("com.vodemn.lightmeter.VolumePlatformChannel.EventChannel");
 
   const VolumeEventsService(this._localPlatform);
 
@@ -19,9 +19,7 @@ class VolumeEventsService {
     if (!_localPlatform.isAndroid) {
       return false;
     }
-    return volumeHandlingChannel
+    return volumeMethodChannel.invokeMethod<bool>("setVolumeHandling", enableHandling).then((value) => value!);
-        .invokeMethod<bool>("setVolumeHandling", enableHandling)
-        .then((value) => value!);
   }
 
   /// Emits new events on
@@ -32,9 +30,6 @@ class VolumeEventsService {
     if (!_localPlatform.isAndroid) {
       return const Stream.empty();
     }
-    return volumeEventsChannel
+    return volumeEventsChannel.receiveBroadcastStream().cast<int>().where((event) => event == 24 || event == 25);
-        .receiveBroadcastStream()
-        .cast<int>()
-        .where((event) => event == 24 || event == 25);
   }
 }

lib/l10n/intl_de.arb

@@ -45,6 +45,8 @@
     "cameraFeatureSpotMeteringHint": "Halte die Kameraansicht gedrückt um den Messpunkt zu entfernen",
     "cameraFeatureHistogram": "Histogramm",
     "cameraFeatureHistogramHint": "Verwendung des Histogramms kann den Batterieverbrauch erhöhen",
+    "cameraFeaturesShowFocalLength": "Brennweite anzeigen",
+    "cameraFeaturesShowFocalLengthHint": "Zeigt die 35mm-äquivalente Brennweite statt des Zoomfaktors an",
     "film": "Film",
     "filmPush": "Film (push)",
     "filmPull": "Film (pull)",

lib/l10n/intl_en.arb

@@ -46,7 +46,7 @@
     "cameraFeatureHistogram": "Histogram",
     "cameraFeatureHistogramHint": "Enabling histogram can encrease battery drain",
     "cameraFeaturesShowFocalLength": "Show Focal Length",
-    "cameraFeaturesShowFocalLengthHint": "Focal length will be determined after the first photo is taken",
+    "cameraFeaturesShowFocalLengthHint": "Displays 35mm equivalent focal length instead of zoom factor",
     "film": "Film",
     "filmPush": "Film (push)",
     "filmPull": "Film (pull)",

lib/l10n/intl_fr.arb

@@ -46,7 +46,7 @@
     "cameraFeatureHistogram": "Histogramme",
     "cameraFeatureHistogramHint": "L'activation de l'histogramme peut augmenter la consommation de la batterie",
     "cameraFeaturesShowFocalLength": "Afficher la focale",
-    "cameraFeaturesShowFocalLengthHint": "La focale sera déterminée après la première photo",
+    "cameraFeaturesShowFocalLengthHint": "Affiche la focale équivalente 35 mm au lieu du facteur de zoom",
     "film": "Pellicule",
     "filmPush": "Pellicule (push)",
     "filmPull": "Pellicule (pull)",

lib/l10n/intl_ru.arb

@@ -46,7 +46,7 @@
     "cameraFeatureHistogram": "Гистограмма",
     "cameraFeatureHistogramHint": "Использование гистограммы может увеличить расход аккумулятора",
     "cameraFeaturesShowFocalLength": "Показать фокусное расстояние",
-    "cameraFeaturesShowFocalLengthHint": "Фокусное расстояние будет определено после первого снимка",
+    "cameraFeaturesShowFocalLengthHint": "Показывает эквивалент фокусного расстояния (35 мм) вместо коэффициента зума",
     "film": "Пленка",
     "filmPush": "Пленка (push)",
     "filmPull": "Пленка (pull)",

lib/l10n/intl_zh.arb

@@ -46,7 +46,7 @@
     "cameraFeatureHistogram": "直方图",
     "cameraFeatureHistogramHint": "启用直方图会增加电池消耗",
     "cameraFeaturesShowFocalLength": "显示焦距",
-    "cameraFeaturesShowFocalLengthHint": "焦距将在拍摄第一张照片后确定",
+    "cameraFeaturesShowFocalLengthHint": "显示 35mm 等效焦距而非变焦倍数",
     "film": "胶片",
     "filmPush": "胶片 (push)",
     "filmPull": "胶片 (pull)",

lib/screens/metering/components/camera_container/bloc_container_camera.dart

@@ -250,7 +250,6 @@ class CameraContainerBloc extends EvSourceBlocBase<CameraContainerEvent, CameraC
       final bytes = await file.readAsBytes();
       Directory(file.path).deleteSync(recursive: true);
       final tags = await readExifFromBytes(bytes);
-      _meteringInteractor.setCameraFocalLength(focalLengthFromTags(tags));
       return evFromTags(tags);
     } catch (e, stackTrace) {
       _analytics.logCrash(e, stackTrace);

lib/screens/metering/components/camera_container/mock_bloc_container_camera.part.dart

@@ -73,7 +73,6 @@ class MockCameraContainerBloc extends CameraContainerBloc {
     try {
       final bytes = (await rootBundle.load(PlatformConfig.cameraStubImage)).buffer.asUint8List();
       final tags = await readExifFromBytes(bytes);
-      _meteringInteractor.setCameraFocalLength(focalLengthFromTags(tags));
       return evFromTags(tags);
     } catch (e, stackTrace) {
       log(e.toString(), stackTrace: stackTrace);

lib/utils/exif_utils.dart

@@ -6,7 +6,6 @@ import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 const String _isoExifKey = 'EXIF ISOSpeedRatings';
 const String _apertureExifKey = 'EXIF FNumber';
 const String _shutterSpeedExifKey = 'EXIF ExposureTime';
-const String _focalLengthIn35mmExifKey = "EXIF FocalLengthIn35mmFilm";
 
 double evFromTags(Map<String, IfdTag> tags) {
   final iso = double.tryParse("${tags[_isoExifKey]}");
@@ -29,14 +28,3 @@ double evFromTags(Map<String, IfdTag> tags) {
 
   return log2(math.pow(aperture, 2)) - log2(speed) - log2(iso / 100);
 }
-
-int focalLengthFromTags(Map<String, IfdTag> tags) {
-  final focalLengthIn35mm = int.tryParse("${tags[_focalLengthIn35mmExifKey]}");
-  if (focalLengthIn35mm == null) {
-    throw ArgumentError(
-      'Error parsing focal length',
-      ['$_focalLengthIn35mmExifKey: ${tags[_focalLengthIn35mmExifKey]}'].join(', '),
-    );
-  }
-  return focalLengthIn35mm;
-}

test/data/caffeine_service_test.dart

@@ -7,7 +7,6 @@ void main() {
 
   late CaffeineService service;
 
-  const methodChannel = MethodChannel('com.vodemn.lightmeter/keepScreenOn');
   Future<Object?>? methodCallSuccessHandler(MethodCall methodCall) async {
     switch (methodCall.method) {
       case "isKeepScreenOn":
@@ -21,45 +20,57 @@ void main() {
 
   setUp(() {
     service = const CaffeineService();
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-        .setMockMethodCallHandler(methodChannel, methodCallSuccessHandler);
+      CaffeineService.caffeineMethodChannel,
+      methodCallSuccessHandler,
+    );
   });
 
   tearDown(() {
-    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-        .setMockMethodCallHandler(methodChannel, null);
+      CaffeineService.caffeineMethodChannel,
+      null,
+    );
   });
 
   group(
     'isKeepScreenOn()',
     () {
       test('true', () async {
-        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-            .setMockMethodCallHandler(methodChannel, null);
+          CaffeineService.caffeineMethodChannel,
-        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+          null,
-            .setMockMethodCallHandler(methodChannel, (methodCall) async {
+        );
-          switch (methodCall.method) {
+        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-            case "isKeepScreenOn":
+          CaffeineService.caffeineMethodChannel,
-              return true;
+          (methodCall) async {
-            default:
+            switch (methodCall.method) {
-              return null;
+              case "isKeepScreenOn":
-          }
+                return true;
-        });
+              default:
+                return null;
+            }
+          },
+        );
         expectLater(service.isKeepScreenOn(), completion(true));
       });
 
       test('false', () async {
-        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-            .setMockMethodCallHandler(methodChannel, null);
+          CaffeineService.caffeineMethodChannel,
-        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+          null,
-            .setMockMethodCallHandler(methodChannel, (methodCall) async {
+        );
-          switch (methodCall.method) {
+        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-            case "isKeepScreenOn":
+          CaffeineService.caffeineMethodChannel,
-              return false;
+          (methodCall) async {
-            default:
+            switch (methodCall.method) {
-              return null;
+              case "isKeepScreenOn":
-          }
+                return false;
-        });
+              default:
+                return null;
+            }
+          },
+        );
         expectLater(service.isKeepScreenOn(), completion(false));
       });
     },

test/data/models/camera_features_config_test.dart

@@ -11,11 +11,13 @@ void main() {
             {
               'spotMetering': true,
               'histogram': true,
+              'showFocalLength': true,
             },
           ),
           {
             CameraFeature.spotMetering: true,
             CameraFeature.histogram: true,
+            CameraFeature.showFocalLength: true,
           },
         );
       });
@@ -26,6 +28,7 @@ void main() {
           {
             CameraFeature.spotMetering: false,
             CameraFeature.histogram: false,
+            CameraFeature.showFocalLength: false,
           },
         );
       });

test/data/shared_prefs_service_test.dart

@@ -272,6 +272,7 @@ void main() {
         {
           CameraFeature.spotMetering: false,
           CameraFeature.histogram: false,
+          CameraFeature.showFocalLength: false,
         },
       );
     });
@@ -284,6 +285,7 @@ void main() {
         {
           CameraFeature.spotMetering: false,
           CameraFeature.histogram: true,
+          CameraFeature.showFocalLength: false,
         },
       );
     });
@@ -292,17 +294,18 @@ void main() {
       when(
         () => sharedPreferences.setString(
           UserPreferencesService.cameraFeaturesKey,
-          """{"spotMetering":false,"histogram":true}""",
+          """{"spotMetering":false,"histogram":true,"showFocalLength":true}""",
         ),
       ).thenAnswer((_) => Future.value(true));
       service.cameraFeatures = {
         CameraFeature.spotMetering: false,
         CameraFeature.histogram: true,
+        CameraFeature.showFocalLength: true,
       };
       verify(
         () => sharedPreferences.setString(
           UserPreferencesService.cameraFeaturesKey,
-          """{"spotMetering":false,"histogram":true}""",
+          """{"spotMetering":false,"histogram":true,"showFocalLength":true}""",
         ),
       ).called(1);
     });

test/data/volume_events_service_test.dart

@@ -27,14 +27,14 @@ void main() {
     localPlatform = _MockLocalPlatform();
     service = VolumeEventsService(localPlatform);
     TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-      VolumeEventsService.volumeHandlingChannel,
+      VolumeEventsService.volumeMethodChannel,
       methodCallSuccessHandler,
     );
   });
 
   tearDown(() {
     TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(
-      VolumeEventsService.volumeHandlingChannel,
+      VolumeEventsService.volumeMethodChannel,
       null,
     );
   });

test/providers/user_preferences_provider_test.dart

@@ -37,6 +37,7 @@ void main() {
     when(() => mockUserPreferencesService.cameraFeatures).thenReturn({
       CameraFeature.spotMetering: true,
       CameraFeature.histogram: true,
+      CameraFeature.showFocalLength: true,
     });
     when(() => mockUserPreferencesService.locale).thenReturn(SupportedLocale.en);
     when(() => mockUserPreferencesService.themeType).thenReturn(ThemeType.light);
@@ -227,13 +228,6 @@ void main() {
       expect(find.text("${MeteringScreenLayoutFeature.equipmentProfiles}: true"), findsNWidgets(2));
       expect(find.text("${MeteringScreenLayoutFeature.extremeExposurePairs}: false"), findsNWidgets(2));
       expect(find.text("${MeteringScreenLayoutFeature.filmPicker}: false"), findsNWidgets(2));
-      verify(
-        () => mockUserPreferencesService.meteringScreenLayout = {
-          MeteringScreenLayoutFeature.extremeExposurePairs: false,
-          MeteringScreenLayoutFeature.filmPicker: false,
-          MeteringScreenLayoutFeature.equipmentProfiles: true,
-        },
-      ).called(1);
     },
   );
 
@@ -260,6 +254,7 @@ void main() {
                 onPressed: () => UserPreferencesProvider.of(context).setCameraFeature({
                   CameraFeature.spotMetering: true,
                   CameraFeature.histogram: false,
+                  CameraFeature.showFocalLength: false,
                 }),
                 child: const Text(''),
               ),
@@ -270,15 +265,18 @@ void main() {
       // Match `findsNWidgets(2)` to verify that `cameraFeatureOf` specific results are the same as the whole config
       expect(find.text("${CameraFeature.spotMetering}: true"), findsNWidgets(2));
       expect(find.text("${CameraFeature.histogram}: true"), findsNWidgets(2));
+      expect(find.text("${CameraFeature.showFocalLength}: true"), findsNWidgets(2));
 
       await tester.tap(find.byType(ElevatedButton));
       await tester.pumpAndSettle();
       expect(find.text("${CameraFeature.spotMetering}: true"), findsNWidgets(2));
       expect(find.text("${CameraFeature.histogram}: false"), findsNWidgets(2));
+      expect(find.text("${CameraFeature.showFocalLength}: false"), findsNWidgets(2));
       verify(
         () => mockUserPreferencesService.cameraFeatures = {
           CameraFeature.spotMetering: true,
           CameraFeature.histogram: false,
+          CameraFeature.showFocalLength: false,
         },
       ).called(1);
     },

test/utils/exif_utils_test.dart

@@ -11,7 +11,7 @@ void main() {
       () async {
         final bytes = File('assets/camera_stub_image.jpg').readAsBytesSync();
         final tags = await readExifFromBytes(bytes);
-        expectLater(evFromTags(tags), completion(8.25230310752341));
+        expect(evFromTags(tags), 8.25230310752341);
       },
     );
 
@@ -20,7 +20,7 @@ void main() {
       () async {
         final bytes = File('assets/launcher_icon_dev_512.png').readAsBytesSync();
         final tags = await readExifFromBytes(bytes);
-        expectLater(evFromTags(tags), throwsArgumentError);
+        expect(() => evFromTags(tags), throwsArgumentError);
       },
     );
   });