完整的游戏网格没有在Android工作室中输出？

Question

我正在尝试在基于Hashi的Android Studios中制作拼图应用程序。但是我输出网格游戏地图时遇到问题。我通过二维数组进行双重迭代，然后输出椭圆来代替数字。我希望它能输出带有数字的椭圆形网格 -

1  0  0  0  1
0  2  0  0  2
2  0  3  0  1
0  0  0  0  0
0  0  2  0  2

然而，当我在模拟器中运行我的应用程序时，所有输出都是模拟器设备左上角的第一个椭圆。

public class boardView extends View {

    public float IslandX;
    public float IslandY;
    public int islandDiameter;

    private Canvas canvas;


    public boardView(Context context) {
        super(context);
    }

    int gameBoard[][] = {{0, 1, 0, 0, 1}, {0, 2, 0, 0, 2}, {2, 0, 3, 0, 1}, {0, 0, 0, 0, 0}, {0, 0, 2, 0, 2}};

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    @Override
    protected void onDraw(Canvas canvas) {

            Paint Island = new Paint();
            Island.setStyle(Paint.Style.FILL);

            Island.setStyle(Paint.Style.FILL);

            float stepX = canvas.getWidth() / 5.f;
            float stepY = canvas.getHeight() / 5.f;

            for (int i = 0; i < 5; i++) {
                for (int R = 0; R < 5; R++) {
                    IslandX = i * stepX;
                    IslandY = R * stepY;
                    if (gameBoard[i][R] == 0) {
                        Island.setColor(Color.BLUE);
                        canvas.drawOval(IslandX, IslandY, 50, 50, Island);

                    } else if (gameBoard[i][R] == 1) {
                        Island.setColor(Color.BLACK);
                        canvas.drawOval(IslandX, IslandY, 50, 50, Island);

                    } else if (gameBoard[i][R] == 2) {
                        Island.setColor(Color.BLUE);
                        canvas.drawOval(IslandX, IslandY, 50, 50, Island);

                    }


                }
            }

        }

    }