Android Sudoku app hangs up the issue

When I test Sudoku on a real machine, I find that when I click the screen quickly, the game occasionally hangs dead, log as follows

04-08 15:35:00.838 7317-7356/org.elvalad.sudoku d/openglrenderer:enabling debug mode 004-08 15:35:23.036 7317-7317/ Org.elvalad.sudoku e/inputeventreceiver:exception dispatching input event.04-08 15:35:23.036 7317-7317/ Org.elvalad.sudoku e/messagequeue-jni:exception in MessageQueue callback:handlereceivecallback04-08 15:35:23.041 731 7-7317/org.elvalad.sudoku e/messagequeue-jni:java.lang.arrayindexoutofboundsexception:length=81; index=83 at Org.elvalad.sudoku.GameView.onTouchEvent (gameview.java:282) at ANDROID.VIEW.VIEW.DISPATC            Htouchevent (view.java:8393) at Android.view.ViewGroup.dispatchTransformedTouchEvent (viewgroup.java:2432) At Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) at Android.view.ViewGroup.dispatchTransf            Ormedtouchevent (viewgroup.java:2432) at Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) At Android.view.ViewGroup.dispatchTransformedTouchEvent (viewgroup.java:2432) at Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) at ANDROID.VIEW.V Iewgroup.dispatchtransformedtouchevent (viewgroup.java:2432) at Android.view.ViewGroup.dispatchTouchEvent (VIEWGR oup.java:2119) at Com.android.internal.policy.impl.phonewindow$decorview.superdispatchtouchevent (PhoneWindow.ja            va:2314) at Com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent (phonewindow.java:1692) At Android.app.Activity.dispatchTouchEvent (activity.java:2749) at Com.android.internal.policy.impl.PhoneWin Dow$decorview.dispatchtouchevent (phonewindow.java:2275) at Android.view.View.dispatchPointerEvent (view.java:858  3) at Android.view.viewrootimpl$viewpostimeinputstage.processpointerevent (viewrootimpl.java:4091) at Android.view.viewrootimpl$viewpostimeinputstage.onprocess (viewrootimpl.java:3957) at Android.view.ViewRootImpl $InputStage. Deliver (Viewrootimpl.java:3509) at Android.view.viewrootimpl$inputstage.ondelivertonext (viewrootimpl.java:3562) At Android.view.viewrootimpl$inputstage.forward (viewrootimpl.java:3528) at Android.view.viewrootimpl$asyncinput            Stage.forward (viewrootimpl.java:3638) at android.view.viewrootimpl$inputstage.apply (ViewRootImpl.java:3536) At Android.view.viewrootimpl$asyncinputstage.apply (viewrootimpl.java:3695) at Android.view.ViewRootImpl $InputStage. Deliver (viewrootimpl.java:3509) at Android.view.viewrootimpl$inputstage.ondelivertonext (ViewRootImp l.java:3562) at Android.view.viewrootimpl$inputstage.forward (viewrootimpl.java:3528) at Android.view . Viewrootimpl$inputstage.apply (viewrootimpl.java:3536) at Android.view.viewrootimpl$inputstage.deliver (ViewRootI mpl.java:3509) at Android.view.ViewRootImpl.deliverInputEvent (viewrootimpl.java:5806) at Android.vie W.viewrootimpl.doprocesSinputevents (viewrootimpl.java:5745) at Android.view.ViewRootImpl.enqueueInputEvent (viewrootimpl.java:5716) At Android.view.viewrootimpl$windowinputeventreceiver.oninputevent (viewrootimpl.java:5896) at ANDROID.V Iew. Inputeventreceiver.dispatchinputevent (inputeventreceiver.java:192) at Android.os.MessageQueue.nativePollOnce (Na tive Method) at Android.os.MessageQueue.next (messagequeue.java:143) at Android.os.Looper.loop (Looper . java:122) at Android.app.ActivityThread.main (activitythread.java:5312) at Java.lang.reflect.Method. Invoke (Native Method) at Java.lang.reflect.Method.invoke (method.java:372) at Com.android.internal.os . Zygoteinit$methodandargscaller.run (zygoteinit.java:901) at Com.android.internal.os.ZygoteInit.main (ZYGOTEINIT.J ava:696) 04-08 15:35:23.041 7317-7317/org.elvalad.sudoku d/androidruntime:shutting down VM04-08 15:35:23.042 7317-73 17/org.elvalad.sudoKu e/androidruntime:fatal exception:main Process:org.elvalad.sudoku, pid:7317 java.lang.ArrayIndexOutOfBoundsExc eption:length=81; index=83 at Org.elvalad.sudoku.GameView.onTouchEvent (gameview.java:282) at ANDROID.VIEW.VIEW.DISPATC            Htouchevent (view.java:8393) at Android.view.ViewGroup.dispatchTransformedTouchEvent (viewgroup.java:2432) At Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) at Android.view.ViewGroup.dispatchTransf            Ormedtouchevent (viewgroup.java:2432) at Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) At Android.view.ViewGroup.dispatchTransformedTouchEvent (viewgroup.java:2432) at Android.view.ViewGroup.dispa             Tchtouchevent (viewgroup.java:2119) at Android.view.ViewGroup.dispatchTransformedTouchEvent (viewgroup.java:2432) At Android.view.ViewGroup.dispatchTouchEvent (viewgroup.java:2119) at com.android.internal.policy.im Pl. PhOnewindow$decorview.superdispatchtouchevent (phonewindow.java:2314) at Com.android.internal.policy.impl.PhoneWin Dow.superdispatchtouchevent (phonewindow.java:1692) at Android.app.Activity.dispatchTouchEvent (activity.java:274            9) at Com.android.internal.policy.impl.phonewindow$decorview.dispatchtouchevent (phonewindow.java:2275) At Android.view.View.dispatchPointerEvent (view.java:8583) at Android.view.viewrootimpl$viewpostimeinputstage . Processpointerevent (viewrootimpl.java:4091) at Android.view.viewrootimpl$viewpostimeinputstage.onprocess (ViewR ootimpl.java:3957) at Android.view.viewrootimpl$inputstage.deliver (viewrootimpl.java:3509) at Androi D.view.viewrootimpl$inputstage.ondelivertonext (viewrootimpl.java:3562) at Android.view.viewrootimpl$inputstage.            Forward (viewrootimpl.java:3528) at Android.view.viewrootimpl$asyncinputstage.forward (viewrootimpl.java:3638) At Android.view. Viewrootimpl$inputstage.apply (viewrootimpl.java:3536) at android.view.viewrootimpl$asyncinputstage.apply (ViewRo otimpl.java:3695) at Android.view.viewrootimpl$inputstage.deliver (viewrootimpl.java:3509) at Android . View. Viewrootimpl$inputstage.ondelivertonext (viewrootimpl.java:3562) at Android.view.viewrootimpl$inputstage.forward (viewrootimpl.java:3528) at android.view.viewrootimpl$inputstage.apply (viewrootimpl.java:3536) at a Droid.view.viewrootimpl$inputstage.deliver (viewrootimpl.java:3509) at Android.view.ViewRootImpl.deliverInputEve            NT (viewrootimpl.java:5806) at android.view.ViewRootImpl.doProcessInputEvents (viewrootimpl.java:5745) At Android.view.ViewRootImpl.enqueueInputEvent (viewrootimpl.java:5716) at Android.view.viewrootimpl$windowinpu Teventreceiver.oninputevent (viewrootimpl.java:5896) at Android.view.InputEventReceiver.dispatchInputEvent (Input Eventreceiver.java:192) at Android.os.MessageQueue.nativePollOnce (Native Method) at Android.os.MessageQueue.next (Mess agequeue.java:143) at Android.os.Looper.loop (looper.java:122) at Android.app.ActivityThread.main (Act ivitythread.java:5312) at Java.lang.reflect.Method.invoke (Native Method) at Java.lang.reflect.Method            . Invoke (method.java:372) at Com.android.internal.os.zygoteinit$methodandargscaller.run (zygoteinit.java:901) At Com.android.internal.os.ZygoteInit.main (zygoteinit.java:696)

It is easy to find out from log that the array is out of bounds, that we are not exactly right when we draw the game grid, a simple way to do this is when we use the array to add a protection mechanism, when the index of the array is greater than 81 o'clock to make this touch screen action invalid.

Android Sudoku app hangs up the issue