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java.lang.RuntimeException: Camera is being used after Camera.release() was called	at android.hardware.Camera.setHasPreviewCallback(Native Method)	at android.hardware.Camera.setOneShotPreviewCallback(Camera.java:953)	at com.lwansbrough.RCTCamera.RCTCameraViewFinder.onResult(RCTCameraViewFinder.java:166)	at com.lwansbrough.RCTCamera.BarcodeReader$ReaderAsyncTask.doInBackground(BarcodeReader.java:62)	at com.lwansbrough.RCTCamera.BarcodeReader$ReaderAsyncTask.doInBackground(BarcodeReader.java:40)	at android.os.AsyncTask$2.call(AsyncTask.java:295)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)