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本篇博客基于 http://blog.csdn.net/androidbluetooth/article/details/7716175

在上篇博客里面，介绍了jdbc 的远程连接操作，并且成功了。

点击这里，查看细节。

那么，我们是否可以将这种操作移植到 android 上面？

答案是肯定的，不信你往下看。

程序效果图

项目结构

项目文件中新建 libs 目录，将 jdbc 的 jar 文件放到里面。

这样 adt 插件自动将该 jar 添加到 build path.

数据库表里面的原始数据

插入数据

删除数据

更新数据

Main.java

package mark.zhang;

import java.sql.Connection;
import java.sql.SQLException;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class Main extends Activity {

	private static final String REMOTE_IP = "192.168.1.102";
	private static final String URL = "jdbc:mysql://" + REMOTE_IP + "/mydb";
	private static final String USER = "mark";
	private static final String PASSWORD = "123456";

	private Connection conn;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
	}

	public void onConn(View view) {
		conn = Util.openConnection(URL, USER, PASSWORD);
	}

	public void onInsert(View view) {
		String sql = "insert into mytable values(9, 'hanmeimei')";
		Util.execSQL(conn, sql);
	}

	public void onDelete(View view) {
		String sql = "delete from mytable where name='mark'";
		Util.execSQL(conn, sql);
	}

	public void onUpdate(View view) {
		String sql = "update mytable set name='lilei' where name='hanmeimei'";
		Util.execSQL(conn, sql);
	}

	public void onQuery(View view) {
		System.out.println("All users info:");
		Util.query(conn, "select * from mytable");
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				conn = null;
			} finally {
				conn = null;
			}
		}
	}
}

Util.java

package mark.zhang;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Util {

	public static Connection openConnection(String url, String user,
			String password) {
		Connection conn = null;
		try {
			final String DRIVER_NAME = "com.mysql.jdbc.Driver";
			Class.forName(DRIVER_NAME);
			conn = DriverManager.getConnection(url, user, password);
		} catch (ClassNotFoundException e) {
			conn = null;
		} catch (SQLException e) {
			conn = null;
		}

		return conn;
	}

	public static void query(Connection conn, String sql) {

		if (conn == null) {
			return;
		}

		Statement statement = null;
		ResultSet result = null;

		try {
			statement = conn.createStatement();
			result = statement.executeQuery(sql);
			if (result != null && result.first()) {
				int idColumnIndex = result.findColumn("id");
				int nameColumnIndex = result.findColumn("name");
				System.out.println("id\t\t" + "name");
				while (!result.isAfterLast()) {
					System.out.print(result.getString(idColumnIndex) + "\t\t");
					System.out.println(result.getString(nameColumnIndex));
					result.next();
				}
			}
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if (result != null) {
					result.close();
					result = null;
				}
				if (statement != null) {
					statement.close();
					statement = null;
				}

			} catch (SQLException sqle) {

			}
		}
	}

	public static boolean execSQL(Connection conn, String sql) {
		boolean execResult = false;
		if (conn == null) {
			return execResult;
		}

		Statement statement = null;

		try {
			statement = conn.createStatement();
			if (statement != null) {
				execResult = statement.execute(sql);
			}
		} catch (SQLException e) {
			execResult = false;
		}

		return execResult;
	}
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dip"
        android:onClick="onConn"
        android:text="connect mysql" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dip"
        android:onClick="onInsert"
        android:text="insert data" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dip"
        android:onClick="onDelete"
        android:text="delete data" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dip"
        android:onClick="onUpdate"
        android:text="update data" />

    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="onQuery"
        android:text="query data" />

</LinearLayout>

manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mark.zhang"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="7" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".Main"
            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>
    
    <uses-permission android:name="android.permission.INTERNET"/>

</manifest>

注意：

 <uses-permission android:name="android.permission.INTERNET"/>