Fix USB Camera BufferQueue abandoned crash

android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/.ninja_log

@@ -54,3 +54,5 @@
 3	103	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/CMakeFiles/cmake.verify_globs	5250f1b80cb55465
 5	39	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/CMakeFiles/cmake.verify_globs	5250f1b80cb55465
 3	34	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/CMakeFiles/cmake.verify_globs	5250f1b80cb55465
+4	98	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/CMakeFiles/cmake.verify_globs	5250f1b80cb55465
+5	45	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/CMakeFiles/cmake.verify_globs	5250f1b80cb55465

android/app/.cxx/RelWithDebInfo/3x5j4n2e/arm64-v8a/configure_fingerprint.bin

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android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/.ninja_log

@@ -54,3 +54,5 @@
 8	95	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/CMakeFiles/cmake.verify_globs	1eb2d1da6ebc2e74
 3	34	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/CMakeFiles/cmake.verify_globs	1eb2d1da6ebc2e74
 4	37	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/CMakeFiles/cmake.verify_globs	1eb2d1da6ebc2e74
+3	53	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/CMakeFiles/cmake.verify_globs	1eb2d1da6ebc2e74
+3	42	0	C:/GitHub/Schnappix/android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/CMakeFiles/cmake.verify_globs	1eb2d1da6ebc2e74

android/app/.cxx/RelWithDebInfo/3x5j4n2e/armeabi-v7a/configure_fingerprint.bin

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android/app/build.gradle

@@ -92,8 +92,8 @@ android {
         applicationId 'de.orfel.schnappix'
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 65
-        versionName "23.01.65"
+        versionCode 66
+        versionName "23.01.66"
 
         buildConfigField "String", "REACT_NATIVE_RELEASE_LEVEL", "\"${findProperty('reactNativeReleaseLevel') ?: 'stable'}\""
     }

app.json

@@ -3,7 +3,7 @@
     "newArchEnabled": true,
     "name": "Schnappix",
     "slug": "Schnappix",
-    "version": "23.01.65",
+    "version": "23.01.66",
     "orientation": "landscape",
     "icon": "./Icon.png",
     "userInterfaceStyle": "dark",
@@ -13,7 +13,7 @@
     },
     "android": {
       "package": "de.orfel.schnappix",
-      "versionCode": 65,
+      "versionCode": 66,
       "usesCleartextTraffic": true,
       "adaptiveIcon": {
         "backgroundColor": "#050510",

modules/usb-camera/android/src/main/java/expo/modules/usbcamera/UsbCameraView.kt

@@ -156,9 +156,25 @@ class UsbCameraView(context: Context, appContext: AppContext) : ExpoView(context
                 }
             } catch (ioe: Exception) {}
             
-            // Start the camera preview asynchronously
-            post {
-                startPreview()
+            // Handle SurfaceTexture lifecycle to prevent BufferQueue abandonment
+            // when the view is obscured (e.g. by PreviewScreen)
+            textureView.surfaceTextureListener = object : android.view.TextureView.SurfaceTextureListener {
+                override fun onSurfaceTextureAvailable(surface: android.graphics.SurfaceTexture, width: Int, height: Int) {
+                    startPreview()
+                }
+
+                override fun onSurfaceTextureSizeChanged(surface: android.graphics.SurfaceTexture, width: Int, height: Int) {}
+
+                override fun onSurfaceTextureDestroyed(surface: android.graphics.SurfaceTexture): Boolean {
+                    try {
+                        sharedCameraClient?.getCameraStrategy()?.stopPreview()
+                    } catch (e: Exception) {
+                        android.util.Log.e("UsbCameraView", "SurfaceTextureDestroyed err", e)
+                    }
+                    return true
+                }
+
+                override fun onSurfaceTextureUpdated(surface: android.graphics.SurfaceTexture) {}
             }
         } catch (e: Throwable) {
             val errorMsg = "CRASH IN INIT: ${e.message}\n${android.util.Log.getStackTraceString(e)}"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "schnappix",
-  "version": "23.01.65",
+  "version": "23.01.66",
   "main": "index.ts",
   "dependencies": {
     "@fortawesome/fontawesome-svg-core": "^6.7.2",

src/screens/CameraScreen.tsx

@@ -200,8 +200,13 @@ export default function CameraScreen({
           if (usbCameraRef.current) {
             const connected = await usbCameraRef.current.isCameraConnected();
             if (connected !== isUsbConnected) {
-              logger.log(`USB Connection status changed to: ${connected}`);
-              setIsUsbConnected(connected);
+              if (!connected && isObscuredRef.current) {
+                // Do not update state if we intentionally stopped the preview because it's obscured (e.g. PreviewScreen is shown)
+                // This prevents the ActivityIndicator from flashing when returning to CameraScreen
+              } else {
+                logger.log(`USB Connection status changed to: ${connected}`);
+                setIsUsbConnected(connected);
+              }
             }
             if (!connected && !hasFetchedLogcat) {
               hasFetchedLogcat = true;