1. 效果

2. 需求

每隔一定的時間在5個跑道中隨機生成僵尸，并且從右往左移動

3. 開發

定義一個僵尸生成管理者，負責定時生成僵尸，這里定義的是每隔15秒生成僵尸

package com.su.botanywarzombies.entity;import android.graphics.Canvas; import android.graphics.Paint;import com.su.botanywarzombies.model.BaseModel; import com.su.botanywarzombies.view.GameView;/*** 僵尸生成器*/ public class ZombieManager extends BaseModel {private int TIME = 15 * 1000;private long lastBirthTime = 0l;public ZombieManager() {this.isLive = true;}@Overridepublic void drawSelf(Canvas canvas, Paint paint) {if (System.currentTimeMillis() - lastBirthTime > TIME) {lastBirthTime = System.currentTimeMillis();creatZombie();}}private void creatZombie() {// 游戲圖層加入僵尸GameView.getInstance().apply4CreatZombie();} }

調用僵尸生成器

在onDrawing事件調用，但是要不要生成，根據是否滿足15秒的定時周期

package com.su.botanywarzombies.view;public class GameView extends SurfaceView implements SurfaceHolder.Callback, Runnable {// 僵尸生成器private ZombieManager mZombieManager;private void onDrawing(Canvas mCanvas) {// 定時生成僵尸mZombieManager.drawSelf(mCanvas, mPaint);

隨機生成一個僵尸

其中跑道使用隨機函數完成，僵尸的生成坐標的定義

package com.su.botanywarzombies.view;public class GameView extends SurfaceView implements SurfaceHolder.Callback, Runnable {// 生產僵尸public void apply4CreatZombie() {synchronized (mSurfaceHolder) {int raceWay = 0;// 生成 0~4的跑道，向下強轉取整raceWay = (int) (Math.random() * 5);switch (raceWay) {case 0:// Config.screenWidth + Config.zombieFlames[0].getWidth()// 為了僵尸提前走gameLayout4zombie0.add(new Zombie(Config.screenWidth + Config.zombieFlames[0].getWidth(), Config.racWayYpoint[0], raceWay));break;case 1:gameLayout4zombie1.add(new Zombie(Config.screenWidth + Config.zombieFlames[0].getWidth(), Config.racWayYpoint[1], raceWay));break;case 2:gameLayout4zombie2.add(new Zombie(Config.screenWidth + Config.zombieFlames[0].getWidth(), Config.racWayYpoint[2], raceWay));break;case 3:gameLayout4zombie3.add(new Zombie(Config.screenWidth + Config.zombieFlames[0].getWidth(), Config.racWayYpoint[3], raceWay));break;case 4:gameLayout4zombie4.add(new Zombie(Config.screenWidth + Config.zombieFlames[0].getWidth(), Config.racWayYpoint[4], raceWay));break;default:break;}}}

可以移動的僵尸子類

這里定義了僵尸的動畫和移動速度

package com.su.botanywarzombies.entity;import android.graphics.Canvas; import android.graphics.Paint;import com.su.botanywarzombies.constant.Config; import com.su.botanywarzombies.model.BaseModel;/*** 僵尸類*/ public class Zombie extends BaseModel {// 跑道，有碰撞監測private int raceWay;// 移動的動畫幀private int farmeIndex;// 僵尸移動的速度private int seepX = 1;public Zombie(int locationX, int locationY, int raceWay) {this.locationX = locationX;this.locationY = locationY;this.raceWay = raceWay;this.isLive = true;}@Overridepublic void drawSelf(Canvas canvas, Paint paint) {if (isLive) {canvas.drawBitmap(Config.zombieFlames[farmeIndex], locationX, locationY, paint);farmeIndex = (++farmeIndex) % 7;locationX = locationX - seepX;}} }

4. Demo下載

https://github.com/sufadi/BotanyWarZombies

總結

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