Begin ITSO card support

src/main/java/com/codebutler/farebot/Utils.java

@@ -43,6 +43,7 @@
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import java.io.StringWriter;
+import java.util.Formatter;
 import java.util.List;
 
 public class Utils {
@@ -109,6 +110,30 @@ public static String getHexString (byte[] b, String defaultResult) {
         }
     }
 
+    /**
+     * Turn bytes into hex string representation. Also useful for decoding BCD
+     *
+     * @param b The data to convert
+     * @param offset
+     * @param length
+     * @return
+     */
+    public static String getHexString(byte[] b, int offset, int length) {
+        if (b.length < length + offset)
+            throw new IllegalArgumentException(
+                    "length must be less than or equal to b.length");
+
+        StringBuilder sb = new StringBuilder(length * 2);
+
+        Formatter formatter = new Formatter(sb);
+        for (int i = 0; i < length; i++) {
+            formatter.format("%02x", b[offset + i]);
+        }
+
+        formatter.close();
+        return sb.toString();
+    }
+
     public static byte[] hexStringToByteArray (String s) {
         if ((s.length() % 2) != 0) {
             throw new IllegalArgumentException("Bad input string: " + s);

src/main/java/com/codebutler/farebot/activities/SupportedCardsActivity.java

@@ -74,6 +74,7 @@ public CardsAdapter(Context context) {
             add(new CardInfo(R.drawable.ovchip_card,         "OV-chipkaart",  R.string.location_the_netherlands, R.string.card_note_ovchip));
             add(new CardInfo(R.drawable.bilheteunicosp_card, "Bilhete Único", R.string.location_sao_paulo,       R.string.card_note_bilheteunicosp));
             add(new CardInfo(R.drawable.hsl_card,            "HSL",           R.string.location_helsinki_finland));
+            add(new CardInfo(R.drawable.itso_card,           "ITSO",          R.string.location_united_kingdom));
         }
 
         @Override

src/main/java/com/codebutler/farebot/card/desfire/DesfireCard.java

@@ -36,6 +36,7 @@
 import com.codebutler.farebot.transit.ClipperTransitData;
 import com.codebutler.farebot.transit.HSLTransitData;
 import com.codebutler.farebot.transit.OrcaTransitData;
+import com.codebutler.farebot.transit.ItsoTransitData;
 import com.codebutler.farebot.transit.TransitData;
 import com.codebutler.farebot.transit.TransitIdentity;
 import org.w3c.dom.Document;
@@ -122,6 +123,8 @@ public TransitIdentity parseTransitIdentity() {
             return ClipperTransitData.parseTransitIdentity(this);
         if (HSLTransitData.check(this))
             return HSLTransitData.parseTransitIdentity(this);
+        if (ItsoTransitData.check(this))
+            return ItsoTransitData.parseTransitIdentity(this);
         return null;
     }
 
@@ -133,6 +136,8 @@ public TransitData parseTransitData() {
             return new ClipperTransitData(this);
         if (HSLTransitData.check(this))
             return new HSLTransitData(this);
+        if (ItsoTransitData.check(this))
+            return new ItsoTransitData(this);
         return null;
     }