android飞机游戏敌机移动路径

基础android的飞机类游戏，与前人一样，由surfaceView绘制游戏画面，另起线程控制绘制时间间隔达到动态效果。这里附上最近自己写的敌机自动飞行路径代码。请大家给点意见。

在敌机管理模块，加入此段代碼。movePingXing记录该飞机直线轨迹运行时，每次canvas绘制的x、y的偏量值。moveYuanHu记录该飞机按圆形轨迹运行时，每次canvas绘制的x、y的偏量值。String中，“、”前面得是x方向坐标偏移量，后面得是y方向坐标偏移量。

private static String[] movePingXing = { 5 + "," + 0, 5 + "," + 0, 5 + "," + 0,

			5 + "," + 0, 5 + "," + 0, 5 + "," + 0, 5 + "," + 0,

			5 + "," + 0, 5 + "," + 0, 5 + "," + 0, 5 + "," + 0,

			5 + "," + 0, 5 + "," + 0, 5 + "," + 0, 5 + "," + 0,

			5 + "," + 0, 5 + "," + 0, 5 + "," + 0, 5 + "," + 0, 5 + "," + 0 };

	private static String[] moveYuanHu = { 5 + "," + 1, 5 + "," + 1,

		4 + "," + 2, 4 + "," + 2,

		3 + "," + 3,3 + "," + 3,

			2 + "," + 4, 2 + "," + 4,

			1 + "," + 5, 1 + "," + 5,

			-1 + "," + 5,-1 + "," + 5,

			-2 + "," + 4,-2 + "," + 4,

			-3 + "," + 3, -3 + "," + 3,

			-4 + "," + 2, -4 + "," + 2,

			-5 + "," + 1, -5 + "," + 1,

			-5 + "," + -1,-5 + "," + -1,

			-4 + "," + -2,-4 + "," + -2,

			-3 + "," + -3,-3 + "," + -3,

			-2 + "," + -4,-2 + "," + -4,

			-1 + "," + -5,-1 + "," + -5,

			1 + "," + -5,1 + "," + -5,

			2 + "," + -4,2 + "," + -4,

			3 + "," + -3,3 + "," + -3,

			4 + "," + -2,4 + "," + -2,

			5 + "," + -1,5 + "," + -1};

然后给出路径添加方法，把这些坐标偏移量加入到moveList1。moveList1里的内容一定要充足，必须保证在每次canvas绘制时，飞机都能得到一个有效路径的String。否则会出现空指针异常。

public static boolean initMoveList1() {

		addPingXing();

		addYuanHu();

		addPingXing();

		addPingXing();

		addPingXing();

		return true;

	}

	public static void addPingXing(){

		Map<String, String> map;

		for (int i = 0; i < movePingXing.length; i++) {

			map = new HashMap<String, String>();

			map.put("way", movePingXing[i]);

			moveList1.add(map);

		}

	}

	public static void addYuanHu(){

		Map<String, String> map;

		for (int i = 0; i < moveYuanHu.length; i++) {

			map = new HashMap<String, String>();

			map.put("way", moveYuanHu[i]);

			moveList1.add(map);

		}

	}

调用initMoveList1（）方法后，敌机管理类就可获得一个记录敌机飞行轨迹的偏移量的ArrayList了。

在敌机移动的时候，插入下面代码，实现每次绘制canvas时，让敌机按自己设定的路径动起来。我这里设计时只是简单的直线——圆行——直线飞机路径。

Map<String, String> map= moveList1.get(enemy.getCurrentSecond());

				String moveWay = map.get("way");

				String[] zuobiao= moveWay.split(",");

				enemy.x += Integer.parseInt(zuobiao[0]);

				enemy.y += Integer.parseInt(zuobiao[1]);

上面currentSecond是一个int型变量，是敌机的属性，记录敌机在画面中出现的时间。

望高手给点意见，看有什么地方能改进下。