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第2章 游戏开发基础知识/Sample2_1/.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_1/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample2_1</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_1/.settings/org.eclipse.jdt.core.prefs

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+#Fri Jul 01 07:58:27 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_1/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.pp1">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name=".Sample2_1_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_1/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_1/gen/com/bn/pp1/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.pp1;
+
+public final class R {
+    public static final class attr {
+    }
+    public static final class drawable {
+        public static final int icon=0x7f020000;
+    }
+    public static final class id {
+        public static final int Button01=0x7f060000;
+        public static final int Button02=0x7f060001;
+    }
+    public static final class layout {
+        public static final int main=0x7f030000;
+    }
+    public static final class raw {
+        public static final int musictest=0x7f040000;
+    }
+    public static final class string {
+        public static final int app_name=0x7f050001;
+        public static final int hello=0x7f050000;
+    }
+}

第2章 游戏开发基础知识/Sample2_1/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:layout_width="fill_parent" 
+    android:layout_height="wrap_content" 
+    android:textSize="18dip"
+    android:gravity="center"
+    android:text="即时音效"
+    />    
+<Button 
+	android:text="播放音效" 
+	android:id="@+id/Button01" 
+	android:gravity="center"
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+<Button 
+	android:text="停止播放" 
+	android:id="@+id/Button02" 
+	android:gravity="center"
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+</LinearLayout>

第2章 游戏开发基础知识/Sample2_1/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="hello">Hello World, Sample3_6_Activity!</string>
+    <string name="app_name">Sample2_1</string>
+</resources>

第2章 游戏开发基础知识/Sample2_1/src/com/bn/pp1/Sample2_1_Activity.java

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+package com.bn.pp1;
+
+import java.util.HashMap;
+import android.app.Activity;
+import android.content.Context;
+import android.media.AudioManager;
+import android.media.SoundPool;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.Toast;
+
+public class Sample2_1_Activity extends Activity {
+	SoundPool sp; // 声明SoundPool的引用
+	HashMap<Integer, Integer> hm; // 声明一个HashMap来存放声音文件
+	int currStreamId;// 当前正播放的streamId
+
+	@Override
+	// 重写onCreate方法
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.main); // 设置layout
+		initSoundPool(); // 初始化声音池的方法
+		Button b1 = (Button) this.findViewById(R.id.Button01); // 获取播放按钮
+		b1.setOnClickListener // 为播放按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				playSound(1, 0); // 播放1号声音资源，且播放一次
+				// 提示播放即时音效
+				Toast.makeText(getBaseContext(), "播放即时音效", Toast.LENGTH_SHORT)
+						.show();
+			}
+		});
+		Button b2 = (Button) this.findViewById(R.id.Button02); // 获取停止按钮
+		b2.setOnClickListener // 为停止按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				sp.stop(currStreamId); // 停止正在播放的某个声音
+				// 提示停止播放
+				Toast.makeText(getBaseContext(), "停止播放即时音效", Toast.LENGTH_SHORT)
+						.show();
+			}
+		});
+	}
+
+	// 初始化声音池的方法
+	public void initSoundPool() {
+		sp = new SoundPool(4, AudioManager.STREAM_MUSIC, 0); // 创建SoundPool对象
+		hm = new HashMap<Integer, Integer>(); // 创建HashMap对象
+		hm.put(1, sp.load(this, R.raw.musictest, 1)); // 加载声音文件musictest并且设置为1号声音放入hm中
+	}
+
+	// 播放声音的方法
+	public void playSound(int sound, int loop) { // 获取AudioManager引用
+		AudioManager am = (AudioManager) this
+				.getSystemService(Context.AUDIO_SERVICE);
+		// 获取当前音量
+		float streamVolumeCurrent = am
+				.getStreamVolume(AudioManager.STREAM_MUSIC);
+		// 获取系统最大音量
+		float streamVolumeMax = am
+				.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
+		// 计算得到播放音量
+		float volume = streamVolumeCurrent / streamVolumeMax;
+		// 调用SoundPool的play方法来播放声音文件
+		currStreamId = sp.play(hm.get(sound), volume, volume, 1, loop, 1.0f);
+	}
+}