private void reset_puzzle()
{
//reset the puzzle
currentBoard = lib.CreateEmptyBoard();
UpdateUI();
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
lib = new TicTacToeLib();
currentBoard = lib.CreateEmptyBoard();
SetContentView(Resource.Layout.activity_main);
Android.Support.V7.Widget.Toolbar toolbar = FindViewById <Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
tile1 = FindViewById <AppCompatTextView>(Resource.Id.textView1);
tile2 = FindViewById <AppCompatTextView>(Resource.Id.textView2);
tile3 = FindViewById <AppCompatTextView>(Resource.Id.textView3);
tile4 = FindViewById <AppCompatTextView>(Resource.Id.textView4);
tile5 = FindViewById <AppCompatTextView>(Resource.Id.textView5);
tile6 = FindViewById <AppCompatTextView>(Resource.Id.textView6);
tile7 = FindViewById <AppCompatTextView>(Resource.Id.textView7);
tile8 = FindViewById <AppCompatTextView>(Resource.Id.textView8);
tile9 = FindViewById <AppCompatTextView>(Resource.Id.textView9);
tile1.SetOnTouchListener(this);
tile2.SetOnTouchListener(this);
tile3.SetOnTouchListener(this);
tile4.SetOnTouchListener(this);
tile5.SetOnTouchListener(this);
tile6.SetOnTouchListener(this);
tile7.SetOnTouchListener(this);
tile8.SetOnTouchListener(this);
tile9.SetOnTouchListener(this);
FloatingActionButton fab = FindViewById <FloatingActionButton>(Resource.Id.fab);
fab.Click += FabOnClick;
reset_puzzle();
}