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第2章 游戏开发基础知识/Sample2_8/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="gen"/>
+	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

第2章 游戏开发基础知识/Sample2_8/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample2_8</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

第2章 游戏开发基础知识/Sample2_8/.settings/org.eclipse.jdt.core.prefs

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+#Fri Jul 01 08:06:54 CST 2011
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6

第2章 游戏开发基础知识/Sample2_8/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      android:versionCode="1"
+      android:versionName="1.0" package="com.bn.pp8">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name=".Sample2_8_Activity"
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+    </application>
+
+
+</manifest> 

第2章 游戏开发基础知识/Sample2_8/default.properties

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+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+# 
+# This file must be checked in Version Control Systems.
+# 
+# To customize properties used by the Ant build system use,
+# "build.properties", and override values to adapt the script to your
+# project structure.
+
+# Project target.
+target=android-7

第2章 游戏开发基础知识/Sample2_8/gen/com/bn/pp8/R.java

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+/* AUTO-GENERATED FILE.  DO NOT MODIFY.
+ *
+ * This class was automatically generated by the
+ * aapt tool from the resource data it found.  It
+ * should not be modified by hand.
+ */
+
+package com.bn.pp8;
+
+public final class R {
+    public static final class attr {
+    }
+    public static final class drawable {
+        public static final int bg=0x7f020000;
+        public static final int bullet=0x7f020001;
+        public static final int explode0=0x7f020002;
+        public static final int explode1=0x7f020003;
+        public static final int explode2=0x7f020004;
+        public static final int explode3=0x7f020005;
+        public static final int explode4=0x7f020006;
+        public static final int explode5=0x7f020007;
+        public static final int icon=0x7f020008;
+    }
+    public static final class id {
+        public static final int Button01=0x7f050003;
+        public static final int EditText01=0x7f050002;
+        public static final int EditText02=0x7f050005;
+        public static final int LinearLayout01=0x7f050000;
+        public static final int ScrollView01=0x7f050004;
+        public static final int TextView01=0x7f050001;
+    }
+    public static final class layout {
+        public static final int main=0x7f030000;
+    }
+    public static final class string {
+        public static final int app_name=0x7f040001;
+        public static final int hello=0x7f040000;
+    }
+}

第2章 游戏开发基础知识/Sample2_8/res/layout/main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    >
+	<TextView  
+	android:text="文件IO--读取Assets文件"
+    android:layout_width="fill_parent" 
+    android:textSize="16dip"
+    android:layout_height="wrap_content"     
+    android:gravity="center"
+    />    
+	<LinearLayout
+	android:id="@+id/LinearLayout01" 
+	android:orientation="horizontal"
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+		<TextView 
+		android:text="文件名：" 
+		android:textSize="18dip"
+		android:id="@+id/TextView01" 
+		android:layout_width="wrap_content" 
+		android:layout_height="wrap_content">
+		</TextView>
+		<EditText 
+		android:text="AndroidIO.txt" 
+		android:id="@+id/EditText01" 
+		android:singleLine="true"
+		android:layout_weight="1"
+		android:layout_width="wrap_content" 
+		android:layout_height="wrap_content">
+		</EditText>
+		<Button 
+		android:text="打开文件" 
+		android:id="@+id/Button01" 
+		android:layout_width="wrap_content" 
+		android:layout_height="wrap_content">
+		</Button>
+	</LinearLayout>
+	<ScrollView 
+	android:id="@+id/ScrollView01" 
+	android:layout_width="fill_parent" 
+	android:layout_height="fill_parent">
+		<EditText 
+		android:text="" 
+		android:id="@+id/EditText02" 
+		android:editable="false"
+		android:layout_width="fill_parent" 
+		android:layout_height="fill_parent">
+		</EditText>
+	</ScrollView>
+</LinearLayout>

第2章 游戏开发基础知识/Sample2_8/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="hello">Hello World, Sample3_3_Activity!</string>
+    <string name="app_name">Sample2_8</string>
+</resources>

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/Bullet.java

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+package com.bn.pp8;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+public class Bullet {
+	MySurfaceView gameView;
+	private Bitmap bitmap;// 位图
+	private Bitmap[] bitmaps;// 爆炸动画图组
+	float x;// x方向位移
+	float y;// y方向位移
+	float vx;// x方向速度
+	float vy;// y方向速度
+	private float t = 0;// 时间
+	private float timeSpan = 0.5f;// 时间间隔
+	int size;// 子弹尺寸
+	boolean explodeFlag = false;// 是否绘制子弹的标记
+	Explosion mExplosion;// 爆炸对象引用
+
+	// 构造器
+	public Bullet(MySurfaceView gameView, Bitmap bitmap, Bitmap[] bitmaps,
+			float x, float y, float vx, float vy) {
+		this.gameView = gameView;// 成员变量赋值
+		this.bitmap = bitmap;
+		this.bitmaps = bitmaps;
+		this.x = x;// 成员变量赋值
+		this.y = y;
+		this.vx = vx;
+		this.vy = vy;
+		size = bitmap.getHeight();// 获得图片的高度
+	}
+
+	// 绘制子弹的方法
+	public void drawSelf(Canvas canvas, Paint paint) {
+		if (explodeFlag && mExplosion != null) {// 如果已经爆炸，绘制爆炸动画
+			mExplosion.drawSelf(canvas, paint);
+		} else {
+			go();// 子弹前进
+			canvas.drawBitmap(bitmap, x, y, paint);// 绘制子弹
+		}
+	}
+
+	// 子弹前进的方法
+	public void go() {
+		x += vx * t;// 水平方向匀速直线运动
+		y += vy * t + 0.5f * Constant.G * t * t;// 竖直方向匀加速直线运动
+		if (x >= Constant.EXPLOSION_X || y >= Constant.SCREEN_HEIGHT) {// 子弹在特定位置爆炸
+			mExplosion = new Explosion(gameView, bitmaps, x, y);// 创建爆炸对象
+			explodeFlag = true;// 不再绘制子弹
+			return;
+		}
+		t += timeSpan;// 时间间隔
+	}
+}

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/Constant.java

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+package com.bn.pp8;
+//用于统一管理常量的类
+public class Constant {
+	public static final int SCREEN_WIDTH=480;//屏幕宽度
+	public static final int SCREEN_HEIGHT=320;//屏幕高度
+	public static final int EXPLOSION_X=270;//爆炸X位置
+	public static final float G = 1.0f;//重力加速度的值
+}

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/DrawThread.java

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+package com.bn.pp8;
+
+import android.graphics.Canvas;
+import android.view.SurfaceHolder;
+
+public class DrawThread extends Thread {
+	private boolean flag = true;//线程工作标志位
+	private int sleepSpan = 100;//线程休眠时间
+	MySurfaceView gameView;//父界面引用
+	SurfaceHolder surfaceHolder;//surfaceHolder引用
+
+	public DrawThread(MySurfaceView gameView) {//构造器
+		this.gameView = gameView;
+		this.surfaceHolder = gameView.getHolder();
+	}
+
+	public void run() {
+		Canvas c;//声明画布
+		while (this.flag) {
+			c = null;
+			try {
+				// 锁定整个画布，在内存要求比较高的情况下，建议参数不要为null
+				c = this.surfaceHolder.lockCanvas(null);
+				synchronized (this.surfaceHolder) {
+					gameView.onDraw(c);// 绘制
+				}
+			} finally {
+				if (c != null) {// 并释放锁
+					this.surfaceHolder.unlockCanvasAndPost(c);
+				}
+			}
+			try {
+				Thread.sleep(sleepSpan);// 睡眠指定毫秒数
+			} catch (Exception e) {
+				e.printStackTrace();// 打印堆栈信息
+			}
+		}
+	}
+
+	public void setFlag(boolean flag) {//设置标志位的方法
+		this.flag = flag;
+	}
+}

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/Explosion.java

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+package com.bn.pp8;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+public class Explosion {
+	MySurfaceView gameView;
+	private Bitmap[] bitmaps;// 位图
+	float x;// x方向位移
+	float y;// y方向位移
+	private int anmiIndex = 0;// 爆炸动画帧索引
+
+	public Explosion(MySurfaceView gameView, Bitmap[] bitmaps, float x, float y) {
+		this.gameView = gameView;
+		this.bitmaps = bitmaps;
+		this.x = x;
+		this.y = y;
+	}
+
+	// 绘制背景的方法
+	public void drawSelf(Canvas canvas, Paint paint) {
+		if (anmiIndex >= bitmaps.length - 1) {// 如果动画播放完毕，不再绘制爆炸效果
+			return;
+		}
+		canvas.drawBitmap(bitmaps[anmiIndex], x, y, paint);// 绘制数组中某一幅图
+		anmiIndex++;// 当前下标加1
+	}
+}

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/MySurfaceView.java

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+package com.bn.pp8;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+
+/**
+ * 
+ * 2D SurfaceView
+ * 
+ */
+public class MySurfaceView extends SurfaceView implements
+		SurfaceHolder.Callback {
+	Sample2_8_Activity activity;// activity的引用
+	Paint paint;// 画笔引用
+	DrawThread drawThread;// 绘制线程引用
+	Bitmap bgBmp;//背景图片
+	Bitmap bulletBmp;// 子弹位图
+	Bitmap[] explodeBmps;//爆炸位图数组
+	Bullet bullet;//子弹对象引用
+	public MySurfaceView(Sample2_8_Activity activity) {//构造器
+		super(activity);
+		this.activity = activity;
+		// 获得焦点并设置为可触控
+		this.requestFocus();
+		this.setFocusableInTouchMode(true);
+		getHolder().addCallback(this);// 注册回调接口
+	}
+
+	@Override
+	protected void onDraw(Canvas canvas) {//绘制界面的方法
+		super.onDraw(canvas);
+		canvas.drawBitmap(bgBmp, 0, 0, paint);//绘制背景
+		bullet.drawSelf(canvas, paint);//绘制子弹
+	}
+
+	@Override
+	public void surfaceChanged(SurfaceHolder holder, int format, int width,
+			int height) {//界面变化时调用的方法
+	}
+
+	@Override
+	public void surfaceCreated(SurfaceHolder holder) {
+		paint = new Paint();// 创建画笔
+		paint.setAntiAlias(true);// 打开抗锯齿
+		//加载图片资源
+		bulletBmp = BitmapFactory.decodeResource(this.getResources(), R.drawable.bullet);
+		bgBmp = BitmapFactory.decodeResource(this.getResources(), R.drawable.bg);
+		explodeBmps=new Bitmap[]{
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode0),
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode1),
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode2),
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode3),
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode4),
+				BitmapFactory.decodeResource(this.getResources(), R.drawable.explode5),
+		};
+		bullet = new Bullet(this, bulletBmp,explodeBmps,0,290,1.3f,-5.9f);//创建子弹对象
+		drawThread = new DrawThread(this);//创建绘制线程
+		drawThread.start();//启动绘制线程
+	}
+
+	@Override
+	public void surfaceDestroyed(SurfaceHolder holder) {//界面销毁时调用的方法
+		drawThread.setFlag(false);//停止绘制线程
+	}
+}

第2章 游戏开发基础知识/Sample2_8/src/com/bn/pp8/Sample2_8_Activity.java

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+package com.bn.pp8;
+import android.app.Activity;
+import android.content.pm.ActivityInfo;
+import android.os.Bundle;
+import android.view.Window;
+import android.view.WindowManager;
+public class Sample2_8_Activity extends Activity {
+	MySurfaceView gameView;//游戏界面
+    @Override
+    public void onCreate(Bundle savedInstanceState) {//重写onCreate方法
+        super.onCreate(savedInstanceState);
+        //全屏
+		requestWindowFeature(Window.FEATURE_NO_TITLE); 
+		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,  
+		              WindowManager.LayoutParams.FLAG_FULLSCREEN);
+        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);//设置为横屏
+        gameView = new MySurfaceView(this);//创建游戏界面对象
+        this.setContentView(gameView);//将该界面设置为窗体内容
+    }
+}