crashing in jelly bean 4.2.2 please give any solution

[vishal14321432]

E/UncaughtException: java.lang.RuntimeException: startPreview failed at android.hardware.Camera.startPreview(Native Method) at com.google.zxing.client.android.camera.CameraManager.startPreview(CameraManager.java:202) at com.dlazaro66.qrcodereaderview.QRCodeReaderView.surfaceChanged(QRCodeReaderView.java:250) at android.view.SurfaceView.updateWindow(SurfaceView.java:580) at android.view.SurfaceView.access$000(SurfaceView.java:86) at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:174) at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:680) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1842) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) at android.view.Choreographer.doCallbacks(Choreographer.java:562) at android.view.Choreographer.doFrame(Choreographer.java:532) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) at android.os.Handler.handleCallback(Handler.java:725) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(Native Method)

[vishal14321432]

[kyaw-min]

It's happening in Android 7 too.

java.lang.RuntimeException: 
  at android.hardware.Camera.startPreview (Camera.java)
  at com.google.zxing.client.android.camera.CameraManager.startPreview (CameraManager.java:2)
  at com.dlazaro66.qrcodereaderview.QRCodeReaderView.surfaceChanged (QRCodeReaderView.java:7)
  at android.view.SurfaceView.updateWindow (SurfaceView.java:634)
  at android.view.SurfaceView$3.onPreDraw (SurfaceView.java:161)
  at android.view.ViewTreeObserver.dispatchOnPreDraw (ViewTreeObserver.java:944)
  at android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2205)
  at android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1250)
  at android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:6311)
  at android.view.Choreographer$CallbackRecord.run (Choreographer.java:871)
  at android.view.Choreographer.doCallbacks (Choreographer.java:683)
  at android.view.Choreographer.doFrame (Choreographer.java:619)
  at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:857)
  at android.os.Handler.handleCallback (Handler.java:751)
  at android.os.Handler.dispatchMessage (Handler.java:95)
  at android.os.Looper.loop (Looper.java:241)
  at android.app.ActivityThread.main (ActivityThread.java:6217)
  at java.lang.reflect.Method.invoke (Method.java)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:865)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:755)