Android实战打飞机游戏之实现主角以及主角相关元素(3)

先看效果图

新建player 类

public class player {

 private int playerhp = 3;

 private bitmap bmpplayerhp;
 // 主角坐标以及位图
 private int x, y;
 private bitmap bmpplayer;
 // 主角移动速度

 private int speed = 5;
 // 主角移动标识
 private boolean isup, isdown, isleft, isright;

 // 主角的构造函数
 public player(bitmap bmpplayer, bitmap bmpplayerhp) {
  this.bmpplayer = bmpplayer;
  this.bmpplayerhp = bmpplayerhp;
  // 飞机初始位置
  x = mysurfaceview.screenw / 2 - bmpplayer.getwidth() / 2;
  y = mysurfaceview.screenh - bmpplayer.getheight();
 }

 // 主角游戏绘制方法
 public void draw(canvas canvas, paint paint) {

  // 绘制主角
  canvas.drawbitmap(bmpplayer, x, y, paint);
  // 绘制血量

  for (int i = 0; i < playerhp; i++) {
   canvas.drawbitmap(bmpplayerhp, i * bmpplayerhp.getwidth(),
     mysurfaceview.screenh - bmpplayerhp.getheight(), paint);
  }

 }

 /**
  * 按键事件监听
  */
 public void onkeydown(int keycode, keyevent event) {
  if (keycode == keyevent.keycode_dpad_up) {
   isup = true;
  }
  if (keycode == keyevent.keycode_dpad_down) {
   isdown = true;
  }
  if (keycode == keyevent.keycode_dpad_left) {
   isleft = true;
  }
  if (keycode == keyevent.keycode_dpad_right) {
   isright = true;
  }
 }

 public void onkeyup(int keycode, keyevent event) {
  if (keycode == keyevent.keycode_dpad_up) {
   isup = false;
  }
  if (keycode == keyevent.keycode_dpad_down) {
   isdown = false;
  }
  if (keycode == keyevent.keycode_dpad_left) {
   isleft = false;
  }
  if (keycode == keyevent.keycode_dpad_right) {
   isright = false;
  }
 }

 /**
  * 游戏逻辑
  */
 public void logic() {
  if (isup) {
   y -= speed;
  }
  if (isdown) {
   y += speed;
  }
  if (isleft) {
   x -= speed;
  }
  if (isright) {
   x += speed;
  }
  // 判断屏幕x边界
  if (x + bmpplayer.getwidth() >= mysurfaceview.screenw) {
   x = mysurfaceview.screenw - bmpplayer.getwidth();
  } else if (x <= 0) {
   x = 0;
  }
  // 判断屏幕y边界
  if (y + bmpplayer.getheight() >= mysurfaceview.screenh) {
   y = mysurfaceview.screenh - bmpplayer.getheight();
  } else if (y <= 0) {
   y = 0;
  }

 }


 //设置主角血量
 public void setplayerhp(int hp) {
  this.playerhp = hp;
 }

 //获取主角血量
 public int getplayerhp() {
  return playerhp;
 }


}

再在mysurfaceview中调用

public class mysurfaceview extends surfaceview implements callback, runnable {
 private surfaceholder sfh;
 private paint paint;
 private thread th;
 private boolean flag;
 private canvas canvas;

 // 1 定义游戏状态常量
 public static final int game_menu = 0;// 游戏菜单
 public static final int gameing = 1;// 游戏中
 public static final int game_win = 2;// 游戏胜利
 public static final int game_lost = 3;// 游戏失败
 public static final int game_pause = -1;// 游戏菜单
 // 当前游戏状态(默认初始在游戏菜单界面)
 public static int gamestate = game_menu;
 // 声明一个resources实例便于加载图片
 private resources res = this.getresources();
 // 声明游戏需要用到的图片资源(图片声明)
 private bitmap bmpbackground;// 游戏背景
 private bitmap bmpboom;// 爆炸效果
 private bitmap bmpboosboom;// boos爆炸效果
 private bitmap bmpbutton;// 游戏开始按钮
 private bitmap bmpbuttonpress;// 游戏开始按钮被点击
 private bitmap bmpenemyduck;// 怪物鸭子
 private bitmap bmpenemyfly;// 怪物苍蝇
 private bitmap bmpenemyboos;// 怪物猪头boos
 private bitmap bmpgamewin;// 游戏胜利背景
 private bitmap bmpgamelost;// 游戏失败背景
 private bitmap bmpplayer;// 游戏主角飞机
 private bitmap bmpplayerhp;// 主角飞机血量
 private bitmap bmpmenu;// 菜单背景
 public static bitmap bmpbullet;// 子弹
 public static bitmap bmpenemybullet;// 敌机子弹
 public static bitmap bmpbossbullet;// boss子弹
 public static int screenw;
 public static int screenh;

 //
 private gamemenu gamemenu;
 private gamebg gamebg;

 private player player;

 /**
  * surfaceview初始化函数
  */
 public mysurfaceview(context context) {
  super(context);
  sfh = this.getholder();
  sfh.addcallback(this);
  paint = new paint();
  paint.setcolor(color.white);
  paint.setantialias(true);
  setfocusable(true);
 }

 /**
  * surfaceview视图创建，响应此函数
  */
 @override
 public void surfacecreated(surfaceholder holder) {
  screenw = this.getwidth();
  screenh = this.getheight();
  initgame();
  flag = true;
  // 实例线程
  th = new thread(this);
  // 启动线程
  th.start();
 }

 /**
  * 加载游戏资源
  */
 private void initgame() {
  // 加载游戏资源
  bmpbackground = bitmapfactory
    .decoderesource(res, r.drawable.background);
  bmpboom = bitmapfactory.decoderesource(res, r.drawable.boom);
  bmpboosboom = bitmapfactory.decoderesource(res, r.drawable.boos_boom);
  bmpbutton = bitmapfactory.decoderesource(res, r.drawable.button);
  bmpbuttonpress = bitmapfactory.decoderesource(res,
    r.drawable.button_press);
  bmpenemyduck = bitmapfactory.decoderesource(res, r.drawable.enemy_duck);
  bmpenemyfly = bitmapfactory.decoderesource(res, r.drawable.enemy_fly);
  bmpenemyboos = bitmapfactory.decoderesource(res, r.drawable.enemy_pig);
  bmpgamewin = bitmapfactory.decoderesource(res, r.drawable.gamewin);
  bmpgamelost = bitmapfactory.decoderesource(res, r.drawable.gamelost);
  bmpplayer = bitmapfactory.decoderesource(res, r.drawable.player);
  bmpplayerhp = bitmapfactory.decoderesource(res, r.drawable.hp);
  bmpmenu = bitmapfactory.decoderesource(res, r.drawable.menu);
  bmpbullet = bitmapfactory.decoderesource(res, r.drawable.bullet);
  bmpenemybullet = bitmapfactory.decoderesource(res,
    r.drawable.bullet_enemy);
  bmpbossbullet = bitmapfactory
    .decoderesource(res, r.drawable.boosbullet);

  //菜单类实例化
  gamemenu = new gamemenu(bmpmenu, bmpbutton, bmpbuttonpress);

  gamebg = new gamebg(bmpbackground);

  player = new player(bmpplayer,bmpplayerhp);

 }

 /**
  * 游戏绘图
  */
 public void mydraw() {
  try {
   canvas = sfh.lockcanvas();
   if (canvas != null) {
    canvas.drawcolor(color.white);
    // 绘图函数根据游戏状态不同进行不同绘制

    switch (gamestate) {
    case game_menu:

     gamemenu.draw(canvas, paint);
     break;
    case gameing:
     gamebg.draw(canvas, paint);
     player.draw(canvas, paint);
     break;

    case game_win:

     break;
    case game_lost:

     break;
    case game_pause:

     break;
    default:
     break;
    }

   }
  } catch (exception e) {
   // todo: handle exception
  } finally {
   if (canvas != null)
    sfh.unlockcanvasandpost(canvas);
  }
 }

 /**
  * 触屏事件监听
  */
 @override
 public boolean ontouchevent(motionevent event) {
  switch (gamestate) {
  case game_menu:

   gamemenu.ontouchevent(event);
   break;
  case gameing:

   break;

  case game_win:

   break;
  case game_lost:

   break;
  case game_pause:

   break;
  }
  return true;
 }

 /**
  * 按键事件监听
  */
 @override
 public boolean onkeydown(int keycode, keyevent event) {
  switch (gamestate) {
  case game_menu:

   break;
  case gameing:
   player.onkeydown(keycode, event);
   break;

  case game_win:

   break;
  case game_lost:

   break;
  case game_pause:
   break;
  }
  return super.onkeydown(keycode, event);
 }

 @override
 public boolean onkeyup(int keycode, keyevent event) {
  switch (gamestate) {
  case game_menu:

   break;
  case gameing:
   player.onkeyup(keycode, event);
   break;

  case game_win:

   break;
  case game_lost:

   break;
  case game_pause:
   break;
  }
  return super.onkeyup(keycode, event);
 }

 /**
  * 游戏逻辑
  */
 private void logic() {
  switch (gamestate) {
  case game_menu:

   break;
  case gameing:
   gamebg.logic();
   player.logic();
   break;

  case game_win:

   break;
  case game_lost:

   break;
  case game_pause:
   break;
  }

 }

 @override
 public void run() {
  while (flag) {
   long start = system.currenttimemillis();
   mydraw();
   logic();
   long end = system.currenttimemillis();
   try {
    if (end - start < 50) {
     thread.sleep(50 - (end - start));
    }
   } catch (interruptedexception e) {
    e.printstacktrace();
   }
  }
 }

 /**
  * surfaceview视图状态发生改变，响应此函数
  */
 @override
 public void surfacechanged(surfaceholder holder, int format, int width,
   int height) {
 }

 /**
  * surfaceview视图消亡时，响应此函数
  */
 @override
 public void surfacedestroyed(surfaceholder holder) {
  flag = false;
 }
}

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