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/*
* Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui;
import android.annotation.TargetApi;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcAdapter.CreateNdefMessageCallback;
import android.nfc.NfcAdapter.OnNdefPushCompleteCallback;
import android.nfc.NfcEvent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;
import com.devspark.appmsg.AppMsg;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.util.Log;
import java.io.IOException;
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public class ViewKeyActivityJB extends ViewKeyActivity implements CreateNdefMessageCallback,
OnNdefPushCompleteCallback {
private NfcAdapter mNfcAdapter;
private byte[] mSharedKeyringBytes;
private static final int NFC_SENT = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
initNfc();
}
/**
* NFC: Initialize NFC sharing if OS and device supports it
*/
private void initNfc() {
// check if NFC Beam is supported (>= Android 4.1)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
// Check for available NFC Adapter
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter != null) {
// init nfc
// Register callback to set NDEF message
mNfcAdapter.setNdefPushMessageCallback(this, this);
// Register callback to listen for message-sent success
mNfcAdapter.setOnNdefPushCompleteCallback(this, this);
}
}
}
/**
* NFC: Implementation for the CreateNdefMessageCallback interface
*/
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
/**
* When a device receives a push with an AAR in it, the application specified in the AAR is
* guaranteed to run. The AAR overrides the tag dispatch system. You can add it back in to
* guarantee that this activity starts when receiving a beamed message. For now, this code
* uses the tag dispatch system.
*/
try {
// get public keyring as byte array
mSharedKeyringBytes = ProviderHelper.getPGPKeyRing(this, mDataUri).getEncoded();
NdefMessage msg = new NdefMessage(NdefRecord.createMime(Constants.NFC_MIME,
mSharedKeyringBytes), NdefRecord.createApplicationRecord(Constants.PACKAGE_NAME));
return msg;
} catch(IOException e) {
Log.e(Constants.TAG, "Error parsing keyring", e);
return null;
}
}
/**
* NFC: Implementation for the OnNdefPushCompleteCallback interface
*/
@Override
public void onNdefPushComplete(NfcEvent arg0) {
// A handler is needed to send messages to the activity when this
// callback occurs, because it happens from a binder thread
mNfcHandler.obtainMessage(NFC_SENT).sendToTarget();
}
/**
* NFC: This handler receives a message from onNdefPushComplete
*/
private final Handler mNfcHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case NFC_SENT:
AppMsg.makeText(ViewKeyActivityJB.this, R.string.nfc_successfull,
AppMsg.STYLE_INFO).show();
break;
}
}
};
}
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