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第2章 游戏开发基础知识/Sample2_2/.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_2/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample2_2</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_2/.settings/org.eclipse.jdt.core.prefs

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+#Fri Jul 01 07:55:04 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_2/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.pp2">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name=".Sample2_2_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_2/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_2/gen/com/bn/pp2/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.pp2;
+
+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=0x7f050000;
+        public static final int Button02=0x7f050001;
+        public static final int Button03=0x7f050002;
+        public static final int Button04=0x7f050003;
+        public static final int Button05=0x7f050004;
+    }
+    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_2/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:gravity="center"
+    android:text="简单音乐播放器"
+    />    
+	<Button 
+	android:text="播放音乐" 
+	android:id="@+id/Button01" 
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+	<Button 
+	android:text="暂停播放" 
+	android:id="@+id/Button02" 
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+	<Button 
+	android:text="停止播放" 
+	android:id="@+id/Button03" 
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+	<Button 
+	android:text="增大音量" 
+	android:id="@+id/Button04" 
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+	<Button 
+	android:text="减小音量" 
+	android:id="@+id/Button05" 
+	android:layout_width="fill_parent" 
+	android:layout_height="wrap_content">
+	</Button>
+</LinearLayout>

第2章 游戏开发基础知识/Sample2_2/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="hello">Hello World, Sample3_7_Activity!</string>
+    <string name="app_name">Sample2_2</string>
+</resources>

第2章 游戏开发基础知识/Sample2_2/src/com/bn/pp2/Sample2_2_Activity.java

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+package com.bn.pp2;
+
+import java.io.IOException;
+
+import android.app.Activity;
+import android.content.Context;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.Toast;
+
+public class Sample2_2_Activity extends Activity {
+	MediaPlayer mp; // 声明MediaPlayer的引用
+	AudioManager am; // 声明AudioManager的引用
+	private int maxVolume; // 最大音量值   
+	private int currVolume; // 当前音量值   
+	private int stepVolume; // 每次调整的音量幅度   
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) // 重写onCreate方法
+	{
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.main); // 设置layout
+		mp = new MediaPlayer(); // 创建MediaPlayer实例对象
+		try {
+			mp.setDataSource("/sdcard/gsls.mp3"); // 为MediaPlayer设置要播放文件资源
+			mp.prepare(); // MediaPlayer进行缓冲准备
+		}
+		catch (Exception e) {
+			e.printStackTrace();
+		}
+		am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE); // 获取AudioManager对象引用
+		// 获取最大音乐音量   
+		maxVolume = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC);  		
+		// 每次调整的音量大概为最大音量的1/6   
+		stepVolume = maxVolume / 6;  
+
+		Button bstart = (Button) this.findViewById(R.id.Button01); // 获取开始按钮
+		bstart.setOnClickListener // 为开始按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				mp.start(); // 调用MediaPlayer的start方法来播放音乐
+				Toast.makeText(getBaseContext(), "开始播放'高山流水曲'",
+						Toast.LENGTH_LONG).show();
+			}
+		});
+		Button bpause = (Button) this.findViewById(R.id.Button02); // 获取暂停按钮
+		bpause.setOnClickListener // 为暂停按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				mp.pause(); // 调用MediaPlayer的pause方法暂停播放音乐
+				Toast.makeText(getBaseContext(), "暂停播放'高山流水曲'",
+						Toast.LENGTH_LONG).show();
+			}
+		});
+		Button bstop = (Button) this.findViewById(R.id.Button03); // 获取停止按钮
+		bstop.setOnClickListener // 为停止按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				mp.stop(); // 调用MediaPlayer的stop方法停止播放音乐
+				try {
+					mp.prepare();//进入准备状态
+				} catch (IllegalStateException e) {//捕获异常
+					e.printStackTrace();
+				} catch (IOException e) {//捕获异常
+					e.printStackTrace();
+				}
+				Toast.makeText(getBaseContext(), "停止播放'高山流水曲'",
+						Toast.LENGTH_LONG).show();
+			}
+		});
+
+		Button bUp = (Button) this.findViewById(R.id.Button04); // 获取增大音量按钮
+		bUp.setOnClickListener // 为增大音量按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				// 获取当前音量  
+				currVolume = am.getStreamVolume(AudioManager.STREAM_MUSIC);    
+				//增加音量，但不超过最大音量值
+				int tmpVolume = currVolume + stepVolume; //临时音量
+				currVolume = tmpVolume < maxVolume ? tmpVolume:maxVolume;
+				am.setStreamVolume(AudioManager.STREAM_MUSIC, currVolume,
+						AudioManager.FLAG_PLAY_SOUND);
+				Toast.makeText(getBaseContext(), "增大音量",
+						Toast.LENGTH_SHORT).show();
+			}
+		});
+		Button bDown = (Button) this.findViewById(R.id.Button05); // 获取减小音量按钮
+		bDown.setOnClickListener // 为减小音量按钮添加监听器
+		(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				// 获取当前音量  
+				currVolume = am.getStreamVolume(AudioManager.STREAM_MUSIC);    
+				//减小音量，但不小于0
+				int tmpVolume = currVolume - stepVolume; //临时音量
+				currVolume = tmpVolume > 0 ? tmpVolume:0;		
+				am.setStreamVolume(AudioManager.STREAM_MUSIC, currVolume,
+						AudioManager.FLAG_PLAY_SOUND);
+				Toast.makeText(getBaseContext(), "减小音量",
+						Toast.LENGTH_SHORT).show();
+			}
+		});
+	}
+}