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我目前正在使用fluttercamera包录制和保存视频，但我注意到当设备的相机在另一个应用程序上打开或在锁定屏幕上使用面部解锁时，相机预览会出现异常。

我尝试过使用didChangeAppLifecycleState可能获取或重新初始化相机，但还没有成功。

      await model.fetchCameras();
      if (model.cameras.isNotEmpty) {
        await model.onNewCameraSelected(model.cameras[model.cameraIndex], true);

      }
    }

此问题目前已在此处和此处打开，但尚未解决。

当设备的相机在另一个应用程序中打开时出现此异常。我尝试在上面的示例代码中处理相机并重新初始化它，但它不起作用。

E/CameraCaptureSession(31468): android.hardware.camera2.CameraAccessException: CAMERA_DISCONNECTED (2): cancelRequest:458: Camera device no longer alive
E/CameraCaptureSession(31468):  at android.hardware.camera2.CameraManager.throwAsPublicException(CameraManager.java:814)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.ICameraDeviceUserWrapper.cancelRequest(ICameraDeviceUserWrapper.java:95)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.CameraDeviceImpl.stopRepeating(CameraDeviceImpl.java:1134)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.CameraCaptureSessionImpl.close(CameraCaptureSessionImpl.java:526)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.CameraCaptureSessionImpl$2.onDisconnected(CameraCaptureSessionImpl.java:737)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.CameraDeviceImpl$7.run(CameraDeviceImpl.java:242)
E/CameraCaptureSession(31468):  at android.os.Handler.handleCallback(Handler.java:873)
E/CameraCaptureSession(31468):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/CameraCaptureSession(31468):  at android.os.Looper.loop(Looper.java:214)
E/CameraCaptureSession(31468):  at android.app.ActivityThread.main(ActivityThread.java:6981)
E/CameraCaptureSession(31468):  at java.lang.reflect.Method.invoke(Native Method)
E/CameraCaptureSession(31468):  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
E/CameraCaptureSession(31468):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
E/CameraCaptureSession(31468): Caused by: android.os.ServiceSpecificException: cancelRequest:458: Camera device no longer alive (code 4)
E/CameraCaptureSession(31468):  at android.os.Parcel.createException(Parcel.java:1980)
E/CameraCaptureSession(31468):  at android.os.Parcel.readException(Parcel.java:1934)
E/CameraCaptureSession(31468):  at android.os.Parcel.readException(Parcel.java:1884)
E/CameraCaptureSession(31468):  at android.hardware.camera2.ICameraDeviceUser$Stub$Proxy.cancelRequest(ICameraDeviceUser.java:402)
E/CameraCaptureSession(31468):  at android.hardware.camera2.impl.ICameraDeviceUserWrapper.cancelRe

关于如何强制相机包重新初始化的任何想法？

4

1 回答 1

0

在恢复重新初始化相机

@override
void didChangeAppLifecycleState(AppLifecycleState state) {
  if (state == AppLifecycleState.resumed) {
    _controller != null
        ? _initializeControllerFuture = _controller.initialize()
        : null; //on pause camera is disposed, so we need to call again "issue is only for android"
  }
}

结帐https://medium.com/@navinkumar0118/take-a-picture-using-flutter-camera-a9c11d282632

于 2020-02-26T06:26:19.217 回答