connect mysql server to an android app (java) error

Question

i have been trying to connect to my mysql server using java and Android studio but no luck, i looked up all over the internet but still no success.. my code:

    CharSequence text = "Trying...";
int duration = Toast.LENGTH_SHORT;
Context context = getApplicationContext();
Toast wel = Toast.makeText(context, text, duration);
Toast err = Toast.makeText(context, "Conntection Failed", duration);
Toast suc = Toast.makeText(context, "Conntection Success", duration);

Connection con = null;
String url = "jdbc:mysql://...../?user=....";
     if(con == null) {
         try {
             DriverManager.getConnection(url, "username", "pass");
             suc.show();
         }catch (SQLException ex){
            // handle any errors
             err = Toast.makeText(context, ex.getMessage(), duration);
             err.show();
            }
        }

I already used this command:

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

and I downloaded the jdbc connector.. my error is: "could not create connection to database server" any idea?

Answer 1

if the database is on the local machine, the port is needed to connect. MYSQL usually uses the 3306 port.