i was trying to connect and application with a free server, tried using web service but couldnt do it at all, so now i am trying to do it using jdbc :
the code :
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
getActionBar().hide();
new Con().execute();}
private class Con extends AsyncTask<Void, Void, Void> {
// JDBC driver name and database URL
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_URL = "jdbc:mysql://31.170.165.253/u802222393_gp";
// Database credentials
static final String USER = "u802222393_books";
static final String PASS = "aboasendar";
@Override
protected Void doInBackground(Void... params) {
Connection conn = null;
Statement stmt = null;
try {
// STEP 2: Register JDBC driver
Class.forName(JDBC_DRIVER).newInstance();
// STEP 3: Open a connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL, USER, PASS);
// STEP 4: Execute a query
System.out.println("Creating statement...");
stmt = conn.createStatement();
String sql= "SELECT id, first, last, age FROM test";
ResultSet rs = stmt.executeQuery(sql);
// STEP 5: Extract data from result set
while (rs.next()) {
// Retrieve by column name
int id = rs.getInt("id");
int age = rs.getInt("age");
String first = rs.getString("first");
String last = rs.getString("last");
// Display values
System.out.print("ID: " + id);
System.out.print(", Age: " + age);
System.out.print(", First: " + first);
System.out.println(", Last: " + last);
}
// STEP 6: Clean-up environment
rs.close();
stmt.close();
conn.close();
} catch (SQLException se) {
// Handle errors for JDBC
se.printStackTrace();
} catch (Exception e) {
// Handle errors for Class.forName
e.printStackTrace();
} finally {
// finally block used to close resources
try {
if (stmt != null)
stmt.close();
} catch (SQLException se2) {
}// nothing we can do
catch (java.sql.SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
if (conn != null)
conn.close();
} catch (SQLException se) {
se.printStackTrace();
}// end finally try
catch (java.sql.SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}// end try
System.out.println("Goodbye!");
return null;
}
it always gives an exception on the URL i searched alot but didnt find the answer on how i am supposed to write the URL
Logcat :
