Implement ndef formatting.

Change-Id: I6e3e3abdc304bc14d7c93a413e42bf957963e288

Author: Martijn Coenen

core/java/android/nfc/INfcTag.aidl

@@ -37,4 +37,5 @@ interface INfcTag
     int write(int nativeHandle, in NdefMessage msg);
     int makeReadOnly(int nativeHandle);
     int getModeHint(int nativeHandle);
-}
+    int formatNdef(int nativeHandle, in byte[] key);
+}

core/java/android/nfc/Tag.java

@@ -21,6 +21,7 @@
 import android.nfc.technology.MifareUltralight;
 import android.nfc.technology.NfcV;
 import android.nfc.technology.Ndef;
+import android.nfc.technology.NdefFormatable;
 import android.nfc.technology.NfcA;
 import android.nfc.technology.NfcB;
 import android.nfc.technology.NfcF;
@@ -157,6 +158,9 @@ public TagTechnology getTechnology(int tech) {
                 case TagTechnology.NDEF: {
                     return new Ndef(adapter, this, tech, extras);
                 }
+                case TagTechnology.NDEF_FORMATABLE: {
+                    return new NdefFormatable(adapter, this, tech, extras);
+                }
                 case TagTechnology.NFC_F: {
                     return new NfcF(adapter, this, extras);
                 }

core/java/android/nfc/technology/NdefFormatable.java

@@ -56,7 +56,37 @@ public boolean canBeFormatted() throws IOException {
      * Formats a tag as NDEF, if possible. You may supply a first
      * NdefMessage to be written on the tag.
      */
-    public void format(NdefMessage firstMessage) throws IOException {
-      throw new UnsupportedOperationException();
+    public void format(NdefMessage firstMessage) throws IOException, FormatException {
+        try {
+            byte[] DEFAULT_KEY = {(byte)0xFF,(byte)0xFF,(byte)0xFF,
+                                  (byte)0xFF,(byte)0xFF,(byte)0xFF};
+            int serviceHandle = mTag.getServiceHandle();
+            int errorCode = mTagService.formatNdef(serviceHandle, DEFAULT_KEY);
+            switch (errorCode) {
+                case ErrorCodes.SUCCESS:
+                    break;
+                case ErrorCodes.ERROR_IO:
+                    throw new IOException();
+                case ErrorCodes.ERROR_INVALID_PARAM:
+                    throw new FormatException();
+                default:
+                    // Should not happen
+                    throw new IOException();
+            }
+            errorCode = mTagService.write(serviceHandle, firstMessage);
+            switch (errorCode) {
+                case ErrorCodes.SUCCESS:
+                    break;
+                case ErrorCodes.ERROR_IO:
+                    throw new IOException();
+                case ErrorCodes.ERROR_INVALID_PARAM:
+                    throw new FormatException();
+                default:
+                    // Should not happen
+                    throw new IOException();
+            }
+        } catch (RemoteException e) {
+            attemptDeadServiceRecovery(e);
+        }
     }
 }