1.SQL驱动

下载可以支持android的SQL驱动，下载地址 注意只能下载1.2.7版本。android不支持用高版本的。

将jtds-1.2.7.jar放在android项目libs目录下。

2.开发环境

windows 7 X64

android 4.2

android studio 2.2

3.代码

数据库连接类DBUtil.java

 

package com.example.androidsql;    import java.sql.Connection;  import java.sql.DriverManager;  import java.sql.ResultSet;  import java.sql.SQLException; import java.sql.Statement; public class DBUtil { private static Connection getSQLConnection(String ip, String user, String pwd, String db) { Connection con = null; try { Class.forName("net.sourceforge.jtds.jdbc.Driver"); con = DriverManager.getConnection("jdbc:jtds:sqlserver://" + ip + ":1433/" + db + ";charset=utf8", user, pwd); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return con; } public static String QuerySQL() { String result = ""; try { Connection conn = getSQLConnection("xx.xx.xx.xx", "sa", "123", "DataBaseName"); String sql = "select top 10 * from Users"; Statement stmt = conn.createStatement();// ResultSet rs = stmt.executeQuery(sql); while (rs.next()) { String s1 = rs.getString("UserName"); String s2 = rs.getString("Password"); result += s1 + " - " + s2 + "\n"; System.out.println(s1 + " - " + s2); } rs.close(); stmt.close(); conn.close(); } catch (SQLException e) { e.printStackTrace(); result += "查询数据异常!" + e.getMessage(); } return result; } public static void main(String[] args) { QuerySQL(); } }

 

MainActivity.java 

 

 

package com.example.androidsql;    import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.TextView; public class MainActivity extends Activity { private View btnTest; private View btnClean; private TextView tvTestResult; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnTest=findViewById(R.id.btnTestSql); btnClean=findViewById(R.id.btnClean); tvTestResult = (TextView)findViewById(R.id.tvTestResult); btnTest.setOnClickListener(getClickEvent()); btnClean.setOnClickListener(getClickEvent()); } private View.OnClickListener getClickEvent(){ return new View.OnClickListener() { @Override public void onClick(View v) { tvTestResult.setText("..."); if(v==btnTest){ test(); } } }; } private void test() { Runnable run = new Runnable() { @Override public void run() { String ret = DBUtil.QuerySQL(); Message msg = new Message(); msg.what=1001; Bundle data = new Bundle(); data.putString("result", ret); msg.setData(data); mHandler.sendMessage(msg); } }; new Thread(run).start(); } Handler mHandler = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { case 1001: String str = msg.getData().getString("result"); tvTestResult.setText(str); break; default: break; } }; }; }

 

activity_main.xml 

 

 

string.xml 

 

 

     
     
     
      AndroidSQL
      
     
      Settings
      
     
      Hello world!
      
     
      测试SQL
      
     
      清除数据
      
    

最后如果出现连接数据错误信息 空指针错误，则需要在AndroidManifest.xml中加入