先看看效果圖：
分析: 根據敵機類型區分 敵機 運動邏輯 以及繪制
/** * 敵機 * * @author liuml * @time 2016-5-31 下午4:14:59 */public class Enemy { // 敵機的種類標識 public int type; // 蒼蠅 public static final int TYPE_FLY = 1; // 鴨子(從左往右運動) public static final int TYPE_DUCKL = 2; // 鴨子(從右往左運動) public static final int TYPE_DUCKR = 3; // 敵機圖片資源 public Bitmap bmpEnemy; // 敵機坐標 public int x, y; // 敵機每幀的寬高 public int frameW, frameH; // 敵機當前幀下標 private int frameIndex; // 敵機的移動速度 private int speed;; // 判斷敵機是否已經出屏 public boolean isDead; // 敵機的構造函數 public Enemy(Bitmap bmpEnemy, int enemyType, int x, int y) { this.bmpEnemy = bmpEnemy; frameW = bmpEnemy.getWidth() / 10; frameH = bmpEnemy.getHeight(); this.type = enemyType; this.x = x; this.y = y; // 不同種類的敵機血量不同 switch (type) { // 蒼蠅 case TYPE_FLY: speed = 25; break; // 鴨子 case TYPE_DUCKL: speed = 3; break; case TYPE_DUCKR: speed = 3; break; } } // 敵機繪圖函數 public void draw(Canvas canvas, Paint paint) { canvas.save(); canvas.clipRect(x, y, x + frameW, y + frameH); canvas.drawBitmap(bmpEnemy, x - frameIndex * frameW, y, paint); canvas.restore(); } // 敵機邏輯AI public void logic() { // 不斷循環播放幀形成動畫 frameIndex++; if (frameIndex >= 10) { frameIndex = 0; } // 不同種類的敵機擁有不同的AI邏輯 switch (type) { case TYPE_FLY: if (isDead == false) { // 減速出現，加速返回 speed -= 1; y += speed; if (y <= -200) { isDead = true; } } break; case TYPE_DUCKL: if (isDead == false) { // 斜右下角運動 x += speed / 2; y += speed; if (x > MySurfaceView.screenW) { isDead = true; } } break; case TYPE_DUCKR: if (isDead == false) { // 斜左下角運動 x -= speed / 2; y += speed; if (x < -50) { isDead = true; } } break; } }}在MySurfaceView 中 生成敵機
public class MySurfaceView extends SurfaceView implements Callback, Runnable { private SurfaceHolder sfh; private Paint paint; private Thread th; private boolean flag; private Canvas canvas; // 1 定義游戲狀態常量 public static final int GAME_MENU = 0;// 游戲菜單 public static final int GAMEING = 1;// 游戲中 public static final int GAME_WIN = 2;// 游戲勝利 public static final int GAME_LOST = 3;// 游戲失敗 public static final int GAME_PAUSE = -1;// 游戲菜單 // 當前游戲狀態(默認初始在游戲菜單界面) public static int gameState = GAME_MENU; // 聲明一個Resources實例便于加載圖片 private Resources res = this.getResources(); // 聲明游戲需要用到的圖片資源(圖片聲明) private Bitmap bmpBackGround;// 游戲背景 private Bitmap bmpBoom;// 爆炸效果 private Bitmap bmpBoosBoom;// Boos爆炸效果 private Bitmap bmpButton;// 游戲開始按鈕 private Bitmap bmpButtonPress;// 游戲開始按鈕被點擊 private Bitmap bmpEnemyDuck;// 怪物鴨子 private Bitmap bmpEnemyFly;// 怪物蒼蠅 private Bitmap bmpEnemyBoos;// 怪物豬頭Boos private Bitmap bmpGameWin;// 游戲勝利背景 private Bitmap bmpGameLost;// 游戲失敗背景 private Bitmap bmpPlayer;// 游戲主角飛機 private Bitmap bmpPlayerHp;// 主角飛機血量 private Bitmap bmpMenu;// 菜單背景 public static Bitmap bmpBullet;// 子彈 public static Bitmap bmpEnemyBullet;// 敵機子彈 public static Bitmap bmpBossBullet;// Boss子彈 public static int screenW; public static int screenH; // 聲明一個敵機容器 private Vector<Enemy> vcEnemy; // 每次生成敵機的時間(毫秒) private int createEnemyTime = 50; private int count;// 計數器 // 敵人數組：1和2表示敵機的種類，-1表示Boss // 二維數組的每一維都是一組怪物 private int enemyArray[][] = { { 1, 2 }, { 1, 1 }, { 1, 3, 1, 2 }, { 1, 2 }, { 2, 3 }, { 3, 1, 3 }, { 2, 2 }, { 1, 2 }, { 2, 2 }, { 1, 3, 1, 1 }, { 2, 1 }, { 1, 3 }, { 2, 1 }, { -1 } }; // 當前取出一維數組的下標 private int enemyArrayIndex; // 是否出現Boss標識位 private boolean isBoss; // 隨機庫，為創建的敵機賦予隨即坐標 private Random random; // private GameMenu gameMenu; private GameBg gameBg; private Player player; /** * SurfaceView初始化函數 */ 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視圖創建，響應此函數 */ @Override public void surfaceCreated(SurfaceHolder holder) { screenW = this.getWidth(); screenH = this.getHeight(); initGame(); flag = true; // 實例線程 th = new Thread(this); // 啟動線程 th.start(); } /** * 加載游戲資源 */ private void initGame() { // 加載游戲資源 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); // 菜單類實例化 gameMenu = new GameMenu(bmpMenu, bmpButton, bmpButtonPress); // 實例游戲背景 gameBg = new GameBg(bmpBackGround); // 實例主角 player = new Player(bmpPlayer, bmpPlayerHp); // 實例敵機容器 vcEnemy = new Vector<Enemy>(); // 實例隨機庫 random = new Random(); } /** * 游戲繪圖 */ public void myDraw() { try { canvas = sfh.lockCanvas(); if (canvas != null) { canvas.drawColor(Color.WHITE); // 繪圖函數根據游戲狀態不同進行不同繪制 switch (gameState) { case GAME_MENU: gameMenu.draw(canvas, paint); break; case GAMEING: gameBg.draw(canvas, paint); player.draw(canvas, paint); if (isBoss == false) { // 敵機繪制 for (int i = 0; i < vcEnemy.size(); i++) { vcEnemy.elementAt(i).draw(canvas, paint); } } else { // boss 繪制 } 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); } } /** * 觸屏事件監聽 */ @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; } /** * 按鍵事件監聽 */ @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); } /** * 游戲邏輯 */ private void logic() { switch (gameState) { case GAME_MENU: break; case GAMEING: gameBg.logic(); player.logic(); // 敵機邏輯 if (isBoss == false) { // 敵機邏輯 for (int i = 0; i < vcEnemy.size(); i++) { Enemy en = vcEnemy.elementAt(i); // 因為容器不斷添加敵機 ，那么對敵機isDead判定， // 如果已死亡那么就從容器中刪除,對容器起到了優化作用； if (en.isDead) { vcEnemy.removeElementAt(i); } else { en.logic(); } } // 生成敵機 count++; if (count % createEnemyTime == 0) { for (int i = 0; i < enemyArray[enemyArrayIndex].length; i++) { // 蒼蠅 if (enemyArray[enemyArrayIndex][i] == 1) { int x = random.nextInt(screenW - 100) + 50; vcEnemy.addElement(new Enemy(bmpEnemyFly, 1, x, -50)); // 鴨子左 } else if (enemyArray[enemyArrayIndex][i] == 2) { int y = random.nextInt(20); vcEnemy.addElement(new Enemy(bmpEnemyDuck, 2, -50, y)); // 鴨子右 } else if (enemyArray[enemyArrayIndex][i] == 3) { int y = random.nextInt(20); vcEnemy.addElement(new Enemy(bmpEnemyDuck, 3, screenW + 50, y)); } } // 這里判斷下一組是否為最后一組(Boss) if (enemyArrayIndex == enemyArray.length - 1) { isBoss = true; } else { enemyArrayIndex++; } } } 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視圖狀態發生改變，響應此函數 */ @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } /** * SurfaceView視圖消亡時，響應此函數 */ @Override public void surfaceDestroyed(SurfaceHolder holder) { flag = false; }}碰撞檢測
修改Player類
package com.gsf;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Paint;import android.view.KeyEvent;public class Player { private int playerHp = 3; private Bitmap bmpPlayerHP; // 主角坐標以及位圖 private int x, y; private Bitmap bmpPlayer; // 主角移動速度 private int speed = 5; // 主角移動標識 private boolean isUp, isDown, isLeft, isRight; // 主角的構造函數 public Player(Bitmap bmpPlayer, Bitmap bmpPlayerHp) { this.bmpPlayer = bmpPlayer; this.bmpPlayerHP = bmpPlayerHp; // 飛機初始位置 x = MySurfaceView.screenW / 2 - bmpPlayer.getWidth() / 2; y = MySurfaceView.screenH - bmpPlayer.getHeight(); } // 主角游戲繪制方法 public void draw(Canvas canvas, Paint paint) { // 繪制主角 canvas.drawBitmap(bmpPlayer, x, y, paint); // 繪制血量 for (int i = 0; i < playerHp; i++) { canvas.drawBitmap(bmpPlayerHP, i * bmpPlayerHP.getWidth(), MySurfaceView.screenH - bmpPlayerHP.getHeight(), paint); } } /** * 按鍵事件監聽 */ 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; } } /** * 游戲邏輯 */ public void logic() { if (isUp) { y -= speed; } if (isDown) { y += speed; } if (isLeft) { x -= speed; } if (isRight) { x += speed; } // 判斷屏幕X邊界 if (x + bmpPlayer.getWidth() >= MySurfaceView.screenW) { x = MySurfaceView.screenW - bmpPlayer.getWidth(); } else if (x <= 0) { x = 0; } // 判斷屏幕Y邊界 if (y + bmpPlayer.getHeight() >= MySurfaceView.screenH) { y = MySurfaceView.screenH - bmpPlayer.getHeight(); } else if (y <= 0) { y = 0; } } //設置主角血量 public void setPlayerHp(int hp) { this.playerHp = hp; } //獲取主角血量 public int getPlayerHp() { return playerHp; } //判斷碰撞(敵機與主角子彈碰撞) public boolean isCollsionWith(Enemy bullet) { int x2 = bullet.x; int y2 = bullet.y; int w2 = bullet.frameW; int h2 = bullet.frameH; if (x >= x2 && x >= x2 + w2) { return false; } else if (x <= x2 && x + bmpPlayer.getWidth() <= x2) { return false; } else if (y >= y2 && y >= y2 + h2) { return false; } else if (y <= y2 && y + bmpPlayer.getHeight() <= y2) { return false; } //發生碰撞，讓其死亡 //isDead = true; return true; }}在MySurface中 加上碰撞邏輯
/** * 游戲邏輯 */ private void logic() { switch (gameState) { case GAME_MENU: break; case GAMEING: gameBg.logic(); player.logic(); // 敵機邏輯 if (isBoss == false) { // 敵機邏輯 for (int i = 0; i < vcEnemy.size(); i++) { Enemy en = vcEnemy.elementAt(i); // 因為容器不斷添加敵機 ，那么對敵機isDead判定， // 如果已死亡那么就從容器中刪除,對容器起到了優化作用； if (en.isDead) { vcEnemy.removeElementAt(i); } else { en.logic(); } } // 生成敵機 count++; if (count % createEnemyTime == 0) { for (int i = 0; i < enemyArray[enemyArrayIndex].length; i++) { // 蒼蠅 if (enemyArray[enemyArrayIndex][i] == 1) { int x = random.nextInt(screenW - 100) + 50; vcEnemy.addElement(new Enemy(bmpEnemyFly, 1, x, -50)); // 鴨子左 } else if (enemyArray[enemyArrayIndex][i] == 2) { int y = random.nextInt(20); vcEnemy.addElement(new Enemy(bmpEnemyDuck, 2, -50, y)); // 鴨子右 } else if (enemyArray[enemyArrayIndex][i] == 3) { int y = random.nextInt(20); vcEnemy.addElement(new Enemy(bmpEnemyDuck, 3, screenW + 50, y)); } } // 這里判斷下一組是否為最后一組(Boss) if (enemyArrayIndex == enemyArray.length - 1) { isBoss = true; } else { enemyArrayIndex++; } } //處理敵機與主角的碰撞 for (int i = 0; i < vcEnemy.size(); i++) { if (player.isCollsionWith(vcEnemy.elementAt(i))) { //發生碰撞，主角血量-1 player.setPlayerHp(player.getPlayerHp() - 1); //當主角血量小于0，判定游戲失敗 if (player.getPlayerHp() <= -1) { gameState = GAME_LOST; } } } } break;
// 計時器 private int noCollisionCount = 0; // 因為無敵時間 private int noCollisionTime = 60; // 是否碰撞的標識位 private boolean isCollision;//判斷碰撞(主角與敵機) public boolean isCollsionWith(Enemy en) { //是否處于無敵時間 if (isCollision == false) { int x2 = en.x; int y2 = en.y; int w2 = en.frameW; int h2 = en.frameH; if (x >= x2 && x >= x2 + w2) { return false; } else if (x <= x2 && x + bmpPlayer.getWidth() <= x2) { return false; } else if (y >= y2 && y >= y2 + h2) { return false; } else if (y <= y2 && y + bmpPlayer.getHeight() <= y2) { return false; } //碰撞即進入無敵狀態 isCollision = true; return true; //處于無敵狀態，無視碰撞 } else { return false; } }修改邏輯方法
/** * 游戲邏輯 */ public void logic() { if (isUp) { y -= speed; } if (isDown) { y += speed; } if (isLeft) { x -= speed; } if (isRight) { x += speed; } // 判斷屏幕X邊界 if (x + bmpPlayer.getWidth() >= MySurfaceView.screenW) { x = MySurfaceView.screenW - bmpPlayer.getWidth(); } else if (x <= 0) { x = 0; } // 判斷屏幕Y邊界 if (y + bmpPlayer.getHeight() >= MySurfaceView.screenH) { y = MySurfaceView.screenH - bmpPlayer.getHeight(); } else if (y <= 0) { y = 0; } // 處理無敵狀態 if (isCollision) { // 計時器開始計時 noCollisionCount++; if (noCollisionCount >= noCollisionTime) { // 無敵時間過后，接觸無敵狀態及初始化計數器 isCollision = false; noCollisionCount = 0; } } }
修改主角的繪制
Player 類
// 主角游戲繪制方法 public void draw(Canvas canvas, Paint paint) { // 繪制主角 // 當處于無敵時間時，讓主角閃爍 if (isCollision) { // 每2次游戲循環，繪制一次主角 if (noCollisionCount % 2 == 0) { canvas.drawBitmap(bmpPlayer, x, y, paint); } } else { canvas.drawBitmap(bmpPlayer, x, y, paint); } // 繪制血量 for (int i = 0; i < playerHp; i++) { canvas.drawBitmap(bmpPlayerHP, i * bmpPlayerHP.getWidth(), MySurfaceView.screenH - bmpPlayerHP.getHeight(), paint); } }以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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