import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String instanceConnectionName = "instance_connection_name";
        String databaseName = "databasename";
        String username = "root";
        String password = "password";
        try {
            Class.forName("com.mysql.jdbc.GoogleDriver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            Log.v("test",e.toString());
        }
        String jdbcUrl = String.format(
                "jdbc:mysql://google/%s?cloudSqlInstance=%s"
              + "&socketFactory=com.google.cloud.sql.mysql.SocketFactory&useSSL=false",
                databaseName,
                instanceConnectionName);

        Connection connection = null;
        try {
            connection = DriverManager.getConnection(jdbcUrl, username, password);
        } catch (SQLException e) {
            e.printStackTrace();
            Log.v("test",e.toString());
        }
        //[END doc-example]

        try (Statement statement = connection.createStatement()) {
            ResultSet resultSet = statement.executeQuery("SHOW TABLES;");
            while (resultSet.next()) {
                Log.v("test",resultSet.toString());
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}