import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String url = "jdbc:mysql://database";
        String user = "user";
        String password = "pass";
        try {
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            Connection con = DriverManager.getConnection(url, user, password);
            Statement st = con.createStatement();
            ResultSet rs = st.executeQuery("select * from table");
            con.close();
        }catch (Exception e) {
            e.printStackTrace();
        }
    }
}

allprojects {
    tasks.withType(JavaCompile) {
        sourceCompatibility = '1.7'
        targetCompatibility = '1.7'
    }

    repositories {
        jcenter()
    }
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_7
    targetCompatibility JavaVersion.VERSION_1_7
}