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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.nfc.tech;
import android.nfc.ErrorCodes;
import android.nfc.FormatException;
import android.nfc.INfcTag;
import android.nfc.NdefMessage;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.os.RemoteException;
import android.util.Log;
import java.io.IOException;
/**
* An interface to a {@link Tag} allowing to format the tag as NDEF.
*
* <p>You can acquire this kind of connection with {@link #get}.
*
* <p class="note"><strong>Note:</strong>
* Use of this class requires the {@link android.Manifest.permission#NFC}
* permission.
*/
public final class NdefFormatable extends BasicTagTechnology {
private static final String TAG = "NFC";
/**
* Returns an instance of this tech for the given tag. If the tag doesn't support
* this tech type null is returned.
*
* @param tag The tag to get the tech from
*/
public static NdefFormatable get(Tag tag) {
if (!tag.hasTech(TagTechnology.NDEF_FORMATABLE)) return null;
try {
return new NdefFormatable(tag);
} catch (RemoteException e) {
return null;
}
}
/**
* Internal constructor, to be used by NfcAdapter
* @hide
*/
public NdefFormatable(Tag tag) throws RemoteException {
super(tag, TagTechnology.NDEF_FORMATABLE);
}
/**
* Formats a tag as NDEF, if possible. You may supply a first
* NdefMessage to be written on the tag.
* <p>Either all steps succeed, or an IOException is thrown if any one step
* fails.
*/
public void format(NdefMessage firstMessage) throws IOException, FormatException {
format(firstMessage, false);
}
/**
* Formats a tag as NDEF, if possible. You may supply a first
* NdefMessage to be written on the tag.
* <p>Either all steps succeed, or an IOException is thrown if any one step
* fails.
*/
public void formatReadOnly(NdefMessage firstMessage) throws IOException, FormatException {
format(firstMessage, true);
}
/*package*/ void format(NdefMessage firstMessage, boolean makeReadOnly) throws IOException,
FormatException {
checkConnected();
try {
int serviceHandle = mTag.getServiceHandle();
INfcTag tagService = mTag.getTagService();
int errorCode = tagService.formatNdef(serviceHandle, MifareClassic.KEY_DEFAULT);
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();
}
// Now check and see if the format worked
if (tagService.isNdef(serviceHandle)) {
errorCode = tagService.ndefWrite(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();
}
} else {
throw new IOException();
}
// optionally make read-only
if (makeReadOnly) {
errorCode = tagService.ndefMakeReadOnly(serviceHandle);
switch (errorCode) {
case ErrorCodes.SUCCESS:
break;
case ErrorCodes.ERROR_IO:
throw new IOException();
case ErrorCodes.ERROR_INVALID_PARAM:
throw new IOException();
default:
// Should not happen
throw new IOException();
}
}
} catch (RemoteException e) {
Log.e(TAG, "NFC service dead", e);
}
}
}
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