Add function to make tags readonly about phonegap-nfc HOT 16 CLOSED

    private void eraseTag(CallbackContext callbackContext) throws JSONException {
        Tag tag = savedIntent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
        NdefRecord[] records = {
            new NdefRecord(NdefRecord.TNF_EMPTY, new byte[0], new byte[0], new byte[0])
        };
        writeNdefMessage(new NdefMessage(records), tag, callbackContext, false);
    }

    private void writeTag(JSONArray data, CallbackContext callbackContext) throws JSONException {
        if (getIntent() == null) {  // TODO remove this and handle LostTag
            callbackContext.error("Failed to write tag, received null intent");
        }

        Tag tag = savedIntent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
        NdefRecord[] records = Util.jsonToNdefRecords(data.getString(0));
        boolean makeRealOnly = data.optBoolean(1);
        writeNdefMessage(new NdefMessage(records), tag, callbackContext, makeRealOnly);
    }

    private void writeNdefMessage(final NdefMessage message, final Tag tag, final CallbackContext callbackContext, final boolean makeReadOnly) {
        cordova.getThreadPool().execute(new Runnable() {
            @Override
            public void run() {
                try {
                    Ndef ndef = Ndef.get(tag);
                    if (ndef != null) {
                        ndef.connect();

                        if (ndef.isWritable()) {
                            int size = message.toByteArray().length;
                            if (ndef.getMaxSize() < size) {
                                callbackContext.error("Tag capacity is " + ndef.getMaxSize() +
                                        " bytes, message is " + size + " bytes.");
                            } else {        
                                ndef.writeNdefMessage(message);
                                if(makeReadOnly) {
                                    ndef.makeReadOnly(); // canMakeReadOnly() returns false for I-CODE tags even though makeReadOnly works fine
                                }
                                callbackContext.success();
                            }
                        } else {
                            callbackContext.error("Tag is read only");
                        }
                        ndef.close();
                    } else {
                        NdefFormatable formatable = NdefFormatable.get(tag);
                        if (formatable != null) {
                            formatable.connect();
                            if(makeReadOnly) {
                                formatable.formatReadOnly(message);
                            } else {
                                formatable.format(message);
                            }
                            callbackContext.success();
                            formatable.close();
                        } else {
                            callbackContext.error("Tag doesn't support NDEF");
                        }
                    }
                } catch (FormatException e) {
                    callbackContext.error(e.getMessage());
                } catch (TagLostException e) {
                    callbackContext.error(e.getMessage());
                } catch (IOException e) {
                    callbackContext.error(e.getMessage());
                }
            }
        });
    }