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第2章 游戏开发基础知识/Sample2_4/.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_4/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample2_4</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_4/.settings/org.eclipse.jdt.core.prefs

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+#Fri Jul 01 08:03:18 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_4/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="com.bn.pp4"
+      android:versionCode="1"
+      android:versionName="1.0">
+    <application android:icon="@drawable/icon" android:label="@string/app_name">
+        <activity android:name=".Sample2_4_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>
+		<provider 
+          android:name="MyContentProvider"  
+          android:authorities="com.bn.pp4.provider.student"
+        />
+    </application>
+
+
+</manifest> 

第2章 游戏开发基础知识/Sample2_4/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_4/gen/com/bn/pp4/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.pp4;
+
+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=0x7f050001;
+        public static final int Button02=0x7f050002;
+        public static final int Button03=0x7f050003;
+        public static final int Button04=0x7f050004;
+        public static final int Button05=0x7f050005;
+        public static final int TextView01=0x7f050000;
+    }
+    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_4/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="SQLite的基础操作" 
+    android:id="@+id/TextView01" 
+    android:gravity="center"
+    android:layout_width="fill_parent" 
+    android:layout_height="wrap_content">
+    </TextView>
+    <Button 
+      android:text="创建/打开数据库" 
+      android:id="@+id/Button01" 
+      android:layout_width="fill_parent" 
+      android:layout_height="wrap_content">
+    </Button>
+    <Button 
+      android:text="关闭数据库" 
+      android:id="@+id/Button02" 
+      android:layout_width="fill_parent" 
+      android:layout_height="wrap_content">
+    </Button>   
+    <Button 
+      android:text="添加记录" 
+      android:id="@+id/Button03" 
+      android:layout_width="fill_parent" 
+      android:layout_height="wrap_content">
+    </Button>
+    <Button 
+      android:text="删除记录" 
+      android:id="@+id/Button04" 
+      android:layout_width="fill_parent" 
+      android:layout_height="wrap_content">
+    </Button>   	  
+    <Button 
+      android:text="查询记录" 
+      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_4/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="hello">Hello World, Sample3_4_Activity!</string>
+    <string name="app_name">Sample2_4</string>
+</resources>

第2章 游戏开发基础知识/Sample2_4/src/com/bn/pp4/MyContentProvider.java

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+package com.bn.pp4;
+import android.content.ContentProvider; //导入相关包
+import android.content.ContentValues;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+public class MyContentProvider extends ContentProvider { // 继承ContentProvider
+	private static final UriMatcher um; // 声明Uri匹配引用
+	static {
+		um = new UriMatcher(UriMatcher.NO_MATCH); // 创建UriMatcher
+		um.addURI("com.bn.pp4.provider.student", "stu", 1); // 设置匹配字符串
+	}
+	SQLiteDatabase sld; // 声明SQLiteDatabase引用
+	@Override
+	public String getType(Uri uri) {
+		return null;
+	}
+	@Override	// 调用数据库的query方法时会自动调用该方法
+	public Cursor query(Uri uri, String[] projection, String selection,
+			String[] selectionArgs, String sortOrder) {
+		switch (um.match(uri)) {// 若匹配成功
+		case 1: // 执行操作，获取Cursor对象引用
+			Cursor cur = sld.query("student", projection, selection,
+					selectionArgs, null, null, sortOrder);
+			return cur; // 返回Cursor对象引用
+		}
+		return null;
+	}
+	@Override
+	public int delete(Uri arg0, String arg1, String[] arg2) {// 空实现
+		return 0;
+	}
+
+	@Override
+	public Uri insert(Uri uri, ContentValues values) {// 空实现
+		return null;
+	}
+	@Override
+	public boolean onCreate() { // 创建数据库时自动调用该方法
+		sld = SQLiteDatabase.openDatabase(
+				"/data/data/com.bn.pp4/mydb", // 数据库所在路径
+				null, // 游标工厂，默认为null
+				SQLiteDatabase.OPEN_READWRITE| 
+				SQLiteDatabase.CREATE_IF_NECESSARY // 读写、若不存在则创建
+		);
+		return false;
+	}
+	@Override
+	public int update(Uri uri, ContentValues values, String selection,
+			String[] selectionArgs) {// 空实现
+		return 0;
+	}
+}

第2章 游戏开发基础知识/Sample2_4/src/com/bn/pp4/Sample2_4_Activity.java

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+package com.bn.pp4;
+import android.app.Activity;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.Toast;
+public class Sample2_4_Activity extends Activity {
+	SQLiteDatabase sld; // 声明SQLiteDatabase引用
+	@Override
+	public void onCreate(Bundle savedInstanceState) { // 重新onCreate方法
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.main); // 设置layout
+		Button b = (Button) this.findViewById(R.id.Button01); // 获取打开/创建数据库按钮
+		b.setOnClickListener( // 为打开/创建按钮添加监听器
+		new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				createOrOpenDatabase(); // 调用方法打开或创建数据库
+			}
+		});
+		b = (Button) this.findViewById(R.id.Button02);// 获取关闭数据库按钮
+		b.setOnClickListener( // 为关闭按钮添加监听器
+		new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				closeDatabase(); // 调用方法关闭数据库
+			}
+		});
+		b = (Button) this.findViewById(R.id.Button03); // 获取添加记录按钮
+		b.setOnClickListener( // 为添加按钮添加监听器
+		new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				insert(); // 调用方法插入记录
+			}
+		});
+		b = (Button) this.findViewById(R.id.Button04);// 获取删除记录按钮
+		b.setOnClickListener( // 为删除按钮添加监听器
+		new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				delete(); // 调用方法删除记录
+			}
+		});
+		b = (Button) this.findViewById(R.id.Button05); // 获取查询记录按钮
+		b.setOnClickListener( // 为查询按钮添加监听器
+		new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				query(); // 调用方法查询记录
+			}
+		});
+	}
+	public void createOrOpenDatabase() {// 创建或打开数据库的方法
+		try {
+			sld = SQLiteDatabase.openDatabase(
+					"/data/data/com.bn.pp4/mydb", // 数据库所在路径
+					null, // 游标工厂，默认为null
+					SQLiteDatabase.OPEN_READWRITE |
+					SQLiteDatabase.CREATE_IF_NECESSARY // 模式为读写，若不存在则创建
+			);
+			// 生成创建数据库的sql语句
+			String sql = "create table if not exists student" +
+					"(sno char(5),stuname varchar(20)," +
+					"sage integer,sclass char(5))";
+			sld.execSQL(sql); // 执行sql语句
+			Toast.makeText(getBaseContext(), "成功创建数据库。", 
+					Toast.LENGTH_LONG).show();
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	public void closeDatabase() {// 关闭数据库的方法
+		try {
+			sld.close(); // 关闭数据库
+			Toast.makeText(getBaseContext(), "成功关闭数据库。", 
+					Toast.LENGTH_LONG).show();
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	public void insert() {// 插入记录的方法
+		try  {// 生成插入记录的sql语句
+			String sql = "insert into student values" +
+					"('001','Android',22,'283')";
+			sld.execSQL(sql); // 执行sql语句
+			Toast.makeText(getBaseContext(), "成功插入一条记录。",
+					 Toast.LENGTH_LONG).show();
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	public void delete() {// 删除记录的方法
+		try  {// 生成删除所有记录的sql语句
+			String sql = "delete from student;";
+			sld.execSQL(sql); // 执行sql语句
+			Toast.makeText(getBaseContext(), "成功删除所有记录。", 
+					Toast.LENGTH_LONG).show();
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	public void query(){// 查询的方法
+		try {// 生成查询记录的sql语句
+			String sql = "select * from student where sage>?";
+			Cursor cur = sld.rawQuery(sql, new String[] { "20" }); // 获取Cursor对象引用
+			while (cur.moveToNext()) {// 若存在记录
+				String sno = cur.getString(0); // 获取第一列信息
+				String sname = cur.getString(1); // 获取第二列信息
+				int sage = cur.getInt(2); // 获取第三列信息
+				String sclass = cur.getString(3); // 获取第四列信息
+				Toast.makeText(
+						getBaseContext(),
+						"查询到的记录为：'" + sno + "'\t'" + sname 
+						+ "'\t\t'" + sage+ "'\t'" + sclass + "'", 
+						Toast.LENGTH_LONG).show();
+			}
+			cur.close(); // 关闭Cursor
+		} catch (Exception e) {
+			e.printStackTrace();
+}}}