public static String Server="192.168.0.26:1433";
   public static String DataBase="TEST_CON";
   public static String Username="sa";
   public static String Password="12345678";

   public static Connection Abrir() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException
   {
        Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
        Connection conn = DriverManager.getConnection("jdbc:sqlserver://"+conexao.Server+ ";databaseName="+conexao.DataBase,conexao.Username,conexao.Password);
        return conn;
   }

public int Testar() throws ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException {
    int u = 0;
    Connection conn = conexao.Abrir();
    Statement MW = conn.createStatement();
    ResultSet rs = MW.executeQuery("SELECT*From Tb_utilizador order by Nome");

    while (rs.next()) {
        u = 1;
    }
    return u;
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.con_sql_server"
    android:versionCode="1"
    android:versionName="1.0"
    >
    <uses-sdk
        android:minSdkVersion="19"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" android:hasCode="true" android:permission="android.permission.ACCESS_CHECKIN_PROPERTIES">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

public void ConnectToDatabase(){
    try {

         // Setar as suas configurações
         Class.forName("net.sourceforge.jtds.jdbc.Driver").newInstance();
            String username = "XXXXXXXXX";
            String password = "XXXXXX";
         Connection DbConn = DriverManager.getConnection("jdbc:jtds:sqlserver://192.168.0.26:1433/TEST_CON;user=TEST_CON" + username + ";password=12345678" + password);

         Log.w("Connection","open");
        Statement stmt = DbConn.createStatement();
        ResultSet reset = stmt.executeQuery("SELECT*From Tb_utilizador order by Nome");


         EditText num = (EditText) findViewById(R.id.displaymessage);
        num.setText(reset.getString(1));

        DbConn.close();

        } catch (Exception e)
        {
        Log.w("Erro na conexão","" + e.getMessage());
        }
}