E/AndroidRuntime: FATAL EXCEPTION: main
                                                                             Process: com.example.mahan.myapplication, PID: 11859
                                                                             java.lang.IllegalArgumentException: Invalid offset: -1. Valid range is [0, 923]
                                                                                 at android.text.method.WordIterator.checkOffsetIsValid(WordIterator.java:380)
                                                                                 at android.text.method.WordIterator.isBoundary(WordIterator.java:101)
                                                                                 at android.widget.Editor$SelectionStartHandleView.positionAtCursorOffset(Editor.java:4260)
                                                                                 at android.widget.Editor$HandleView.updatePosition(Editor.java:3708)
                                                                                 at android.widget.Editor$PositionListener.onPreDraw(Editor.java:2507)
                                                                                 at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
                                                                                 at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2055)
                                                                                 at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
                                                                                 at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
                                                                                 at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
                                                                                 at android.view.Choreographer.doCallbacks(Choreographer.java:670)
                                                                                 at android.view.Choreographer.doFrame(Choreographer.java:606)
                                                                                 at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
                                                                                 at android.os.Handler.handleCallback(Handler.java:739)
                                                                                 at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                 at android.os.Looper.loop(Looper.java:148)
                                                                                 at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                                 at java.lang.reflect.Method.invoke(Native Method)
                                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)