CommunityToolkit / CommunityToolkit/Maui
[BUG] Calling CameraProvider.RefreshAvailableCameras() crashes on Android device with no cameras
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Description
### Is there an existing issue for this?
- [x] I have searched the existing issues
### Did you read the "Reporting a bug" section on Contributing file?
- [x] I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug
### Current Behavior
On an Android device that has no cameras, calling CameraProvider.RefreshAvailableCameras() causes an uncaught androidx.camera.core.CameraUnavailableException:
```
FirstChanceException event raised in DefaultDomain: Java.Lang.Exception: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
---> AndroidX.Camera.Core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
---> AndroidX.Camera.Core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
--- End of managed AndroidX.Camera.Core.CameraUnavailableException stack trace ---
androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
--- End of managed AndroidX.Camera.Core.CameraUnavailableException stack trace ---
androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Exception_EndOfInnerExceptionStack
--- End of managed AndroidX.Camera.Core.InitializationException stack trace ---
androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed AndroidX.Camera.Core.InitializationException stack trace ---
androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
Exception_EndOfInnerExceptionStack
--- End of managed Java.Lang.Exception stack trace ---
java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed Java.Lang.Exception stack trace ---
java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
AppDomain.CurrentDomain.UnhandledException event raised in DefaultDomain: Java.Lang.RuntimeException: java.lang.reflect.InvocationTargetException
---> Java.Lang.ReflectiveOperationException: Exception_WasThrown, Java.Lang.ReflectiveOperationException
---> Java.Lang.Exception: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
---> AndroidX.Camera.Core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
---> AndroidX.Camera.Core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
--- End of managed AndroidX.Camera.Core.CameraUnavailableException stack trace ---
androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
--- End of managed AndroidX.Camera.Core.CameraUnavailableException stack trace ---
androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Exception_EndOfInnerExceptionStack
--- End of managed AndroidX.Camera.Core.InitializationException stack trace ---
androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed AndroidX.Camera.Core.InitializationException stack trace ---
androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
Exception_EndOfInnerExceptionStack
at Java.Interop.JniEnvironment.InstanceMethods.CallObjectMethod(JniObjectReference , JniMethodInfo , JniArgumentValue* )
at Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualObjectMethod(String , IJavaPeerable , JniArgumentValue* )
at AndroidX.Camera.Core.Impl.Utils.Futures.FutureChain.Get()
at CommunityToolkit.Maui.Core.CameraProvider.<>c__DisplayClass5_0.b__0()
at Java.Lang.Runnable.Run()
at Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this)
at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(_JniMarshal_PP_V callback, IntPtr jnienv, IntPtr klazz)
--- End of managed Java.Lang.Exception stack trace ---
java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed Java.Lang.Exception stack trace ---
java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
Exception_EndOfInnerExceptionStack
--- End of managed Java.Lang.ReflectiveOperationException stack trace ---
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
... 3 more
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed Java.Lang.ReflectiveOperationException stack trace ---
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
... 3 more
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
Exception_EndOfInnerExceptionStack
--- End of managed Java.Lang.RuntimeException stack trace ---
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:502)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
... 1 more
Caused by: java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
... 3 more
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
--- End of managed Java.Lang.RuntimeException stack trace ---
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:502)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
... 1 more
Caused by: java.util.concurrent.ExecutionException: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.concurrent.futures.AbstractResolvableFuture.getDoneValue(AbstractResolvableFuture.java:517)
at androidx.concurrent.futures.AbstractResolvableFuture.get(AbstractResolvableFuture.java:474)
at androidx.concurrent.futures.CallbackToFutureAdapter$SafeFuture.get(CallbackToFutureAdapter.java:199)
at androidx.camera.core.impl.utils.futures.FutureChain.get(FutureChain.java:155)
at androidx.camera.core.impl.utils.futures.ChainingListenableFuture.get(ChainingListenableFuture.java:105)
at mono.java.lang.Runnable.n_run(Native Method)
at mono.java.lang.Runnable.run(Runnable.java:29)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7583)
... 3 more
Caused by: androidx.camera.core.InitializationException: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
at androidx.camera.core.CameraX.lambda$initAndRetryRecursively$2$androidx-camera-core-CameraX(CameraX.java:433)
at androidx.camera.core.CameraX$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)
Caused by: androidx.camera.core.CameraUnavailableException: Device reporting less cameras than anticipated. On real devices: Retrying initialization might resolve temporary camera errors. On emulators: Ensure virtual camera configuration matches supported camera features as reported by PackageManager#hasSystemFeature. Available cameras: 0
... 5 more
```
### Expected Behavior
Exception should be caught and rethrown, or should at least be catchable within a `try/catch` block.
### Steps To Reproduce
1. Create an Android emulator, specifying `none` for both `hw.camera.back` and `hw.camera.front`
2. Download and build https://github.com/klugerama/MCT_NoCameraCrash
3. Run the application using the Android emulator specified above
4. Click the button
5. Observe the crash
### Link to public reproduction project repository
https://github.com/klugerama/MCT_NoCameraCrash
### Environment
```markdown
- .NET MAUI CommunityToolkit: 12.1.0
- OS: Android 15.0 (tested with Pixel 7 - API 35)
- .NET MAUI: 9.0.80
```
### Anything else?
_No response_
Contributor guide
Research direction
Start at CameraProvider.RefreshAvailableCameras() and trace the Android camera initialization path that produces the reported CameraUnavailableException. Reproduce on an Android device or emulator with zero available cameras, then verify that refreshing completes without an uncaught exception and that the no-camera result is handled consistently.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, csharp
- Domain
- mobile-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100