3d36f17edf
Camera page kept the session running while the host app was
backgrounded — wastes battery, holds the hardware, and blocks
other apps from grabbing the camera. Add per-platform observers
that pause/resume the session on app foreground/background, with
a uniform `pauseForBackground` / `resumeForForeground` pair on the
shared CameraInstance.
Behaviour:
- On background: any in-flight recording is hard-cancelled
(matches every messaging app — the take ends with the app
switch). The session stops so the OS can release the camera.
- On foreground: session restarts iff it had been running.
Emits `sessionInterrupted` (`reason: appBackgrounded`) and
`sessionResumed` events so the Dart side can surface UX
affordances if needed.
iOS — `ios/Classes/Camera/CameraInstance+iOS.swift`:
Subscribes to UIApplication.{willResignActive, didBecomeActive}
notifications. Work hops onto sessionQueue so AV mutations stay
serialised. Storage uses the shared
`CameraInstance.lifecycleCleanup` closure slot — extension
doesn't need to add stored properties.
Android — added `androidx.lifecycle:lifecycle-process:2.7.0`,
observes `ProcessLifecycleOwner.get().lifecycle`. ON_STOP →
`pauseForBackground` (cancels recording + drops
CustomLifecycleOwner to CREATED → CameraX releases camera).
ON_START → `resumeForForeground`. Observer add/remove on main
thread per `ProcessLifecycleOwner` contract.
macOS — `macos/Classes/Camera/CameraInstance+macOS.swift`:
Intentional no-op. macOS desktop background semantics are
softer; the chat composer's Card dialog typically stays
foregrounded. Slot is wired so the shared
`observeLifecycle()` call still compiles.
Verified: all four platforms (iOS / Android / macOS / app tests)
build clean. Pod install picks up the new iOS extension file
once Pods/ is fresh — `flutter clean` if mid-iteration.
74 lines
2.0 KiB
Groovy
74 lines
2.0 KiB
Groovy
group 'io.swipelab.ux'
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version '1.0-SNAPSHOT'
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buildscript {
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ext.kotlin_version = '1.9.22'
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repositories {
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google()
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mavenCentral()
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}
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dependencies {
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classpath 'com.android.tools.build:gradle:8.1.0'
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classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
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}
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}
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rootProject.allprojects {
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repositories {
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google()
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mavenCentral()
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}
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}
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apply plugin: 'com.android.library'
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apply plugin: 'kotlin-android'
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android {
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namespace 'io.swipelab.ux'
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compileSdk 34
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defaultConfig {
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minSdk 21
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externalNativeBuild {
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cmake {
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cppFlags ""
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}
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}
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}
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externalNativeBuild {
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cmake {
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path "src/main/jni/CMakeLists.txt"
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}
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = '1.8'
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}
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}
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dependencies {
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// CameraX for scanner preview + frame analysis + ux.camera.
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// 1.4.0+ ships 16-KB-aligned `libimage_processing_util_jni.so`
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// (Android 15 requirement); 1.3.x failed the elf-alignment check.
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def cameraxVersion = '1.4.2'
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implementation "androidx.camera:camera-core:$cameraxVersion"
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implementation "androidx.camera:camera-camera2:$cameraxVersion"
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implementation "androidx.camera:camera-lifecycle:$cameraxVersion"
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implementation "androidx.camera:camera-view:$cameraxVersion"
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implementation "androidx.camera:camera-video:$cameraxVersion"
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// ProcessLifecycleOwner so CameraInstance can release the camera
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// when the host app backgrounds (and re-acquire on foreground).
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// camera-lifecycle pulls in lifecycle-common but not the process
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// observer; this adds it.
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implementation 'androidx.lifecycle:lifecycle-process:2.7.0'
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// Pure-Kotlin/Java QR decoder. ~470 KB jar, no Play Services dep.
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implementation 'com.google.zxing:core:3.5.3'
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}
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