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


public class main{
    private static void request(){
        String url = "jdbc:mysql://myadress:3306/mydatabase";
        String user = "user";
        String passwd = "passwd";

        Connection conn = null;
        try{
            /* Initializing the connection */
            conn = DriverManager.getConnection(url, user, passwd);

            Statement statement = conn.createStatement();

            ResultSet resultset = statement.executeQuery(/* MY SQL reqquest */);

            while(resultset.next()){
                System.out.println(resultset.getString(/* THE COLUMN AND ROW I WANTED IN MY REQUEST */));
            }

        }catch(SQLException e){
            System.out.println("SQL connection error: " + e.getMessage());
        }finally {
            if(conn != null){
                try{
                    /* CLosing connection */
                    conn.close();
                }catch (SQLException e){
                    System.out.println("Error while closing the connection: " + e.getMessage());
                }
            }
        }
    }
    public static void main(String[] args) {
        try{ // Loading the MySQL Connector/J driver
            Class.forName("com.mysql.jdbc.Driver");
        }catch(ClassNotFoundException e){
            System.out.println("Error while loading the Driver: " + e.getMessage());
        }
        request();
    }

}

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

public void conectarBDMySQL (String user, String password,
            String ip, String port, String cat)
    {
        if (conexionMySQL == null)
        {
            String urlConexionMySQL = "";
            if (cat!= "")
                urlConexionMySQL = "jdbc:mysql://" + ip + ":" + port+ "/" + cat;
            else
                urlConexionMySQL = "jdbc:mysql://" + ip + ":" + port;
            if (user!= "" & password!= "" & ip != "" & port!= "")
            {
                try
                {
                    Class.forName("com.mysql.jdbc.Driver");
                    conexionMySQL = DriverManager.getConnection(urlConexionMySQL,
                            user, password);
                }
                catch (ClassNotFoundException e)
                {
                      Toast.makeText(getApplicationContext(),
                                "Error: " + e.getMessage(),
                                Toast.LENGTH_SHORT).show();
                }
                catch (SQLException e)
                {
                      Toast.makeText(getApplicationContext(),
                                "Error: " + e.getMessage(),
                                Toast.LENGTH_SHORT).show();
                }
            }
        }
    }