java.lang.RuntimeException: Fail to connect to camera service
	at android.hardware.Camera.<init>(Camera.java:586)
	at android.hardware.Camera.open(Camera.java:419)
	at h9.a.j(Unknown Source:32)
	at h9.a.d(Unknown Source:9)
	at com.entitcs.office_attendance.camera.CameraSourcePreview.f(Unknown Source:29)
	at com.entitcs.office_attendance.camera.CameraSourcePreview.d(Unknown Source:12)
	at com.entitcs.office_attendance.camera.CameraSourcePreview.e(Unknown Source:2)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity.W(Unknown Source:37)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity.D(Unknown Source:90)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity$j.onClick(Unknown Source:19)
	at android.view.View.performClick(View.java:7503)
	at com.entitcs.office_attendance.java_classes.MovableFloatingActionButton.onTouch(Unknown Source:171)
	at android.view.View.dispatchTouchEvent(View.java:14384)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3126)
	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2806)
	at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:491)
	at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1871)
	at android.app.Activity.dispatchTouchEvent(Activity.java:4188)
	at h.j.dispatchTouchEvent(Unknown Source:2)
	at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:449)
	at android.view.View.dispatchPointerEvent(View.java:14655)
	at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:6079)
	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5882)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5372)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5430)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5395)
	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5548)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5403)
	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5605)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5376)
	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5430)
	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5395)
	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5403)
	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5376)
	at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:8143)
	at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:8094)
	at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:8055)
	at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:8272)
	at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:220)
	at android.os.MessageQueue.nativePollOnce(Native Method)
	at android.os.MessageQueue.next(MessageQueue.java:335)
	at android.os.Looper.loop(Looper.java:183)
	at android.app.ActivityThread.main(ActivityThread.java:7945)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:603)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)