java.lang.RuntimeException: Camera initialization failed because the max number of camera devices were already opened(-87)
	at android.hardware.Camera.<init>(Camera.java:581)
	at android.hardware.Camera.open(Camera.java:395)
	at n8.a.j(SourceFile)
	at n8.a.d(SourceFile)
	at com.entitcs.office_attendance.camera.CameraSourcePreview.f(SourceFile)
	at com.entitcs.office_attendance.camera.CameraSourcePreview.b(SourceFile)
	at com.entitcs.office_attendance.camera.CameraSourcePreview$b.surfaceCreated(SourceFile)
	at android.view.SurfaceView.updateWindow(SurfaceView.java:598)
	at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:185)
	at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2036)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1105)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6204)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:799)
	at android.view.Choreographer.doCallbacks(Choreographer.java:612)
	at android.view.Choreographer.doFrame(Choreographer.java:581)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:785)
	at android.os.Handler.handleCallback(Handler.java:739)
	at android.os.Handler.dispatchMessage(Handler.java:95)
	at android.os.Looper.loop(Looper.java:135)
	at android.app.ActivityThread.main(ActivityThread.java:5669)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:372)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)