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/*
* Copyright (C) 2015 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 com.example.android.nfcprovisioning;
import android.app.Activity;
import android.app.admin.DevicePolicyManager;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcEvent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Map;
import java.util.Properties;
/**
* Provides UI and logic for NFC provisioning.
* <p>
* This fragment creates an intent, which sends parameters to a second device via an Nfc bump. If
* the second device is factory reset, this will start provisioning the second device to set it up
* as an owned device.
* </p>
*/
public class NfcProvisioningFragment extends Fragment implements
NfcAdapter.CreateNdefMessageCallback,
TextWatcherWrapper.OnTextChangedListener,
LoaderManager.LoaderCallbacks<Map<String, String>> {
private static final int LOADER_PROVISIONING_VALUES = 1;
// View references
private EditText mEditPackageName;
private EditText mEditLocale;
private EditText mEditTimezone;
private EditText mEditWifiSsid;
private EditText mEditWifiSecurityType;
private EditText mEditWifiPassword;
// Values to be set via NFC bump
private Map<String, String> mProvisioningValues;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_nfc_provisioning, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
// Retrieve view references
mEditPackageName = (EditText) view.findViewById(R.id.package_name);
mEditLocale = (EditText) view.findViewById(R.id.locale);
mEditTimezone = (EditText) view.findViewById(R.id.timezone);
mEditWifiSsid = (EditText) view.findViewById(R.id.wifi_ssid);
mEditWifiSecurityType = (EditText) view.findViewById(R.id.wifi_security_type);
mEditWifiPassword = (EditText) view.findViewById(R.id.wifi_password);
// Bind event handlers
mEditPackageName.addTextChangedListener(new TextWatcherWrapper(R.id.package_name, this));
mEditLocale.addTextChangedListener(new TextWatcherWrapper(R.id.locale, this));
mEditTimezone.addTextChangedListener(new TextWatcherWrapper(R.id.timezone, this));
mEditWifiSsid.addTextChangedListener(new TextWatcherWrapper(R.id.wifi_ssid, this));
mEditWifiSecurityType.addTextChangedListener(
new TextWatcherWrapper(R.id.wifi_security_type, this));
mEditWifiPassword.addTextChangedListener(new TextWatcherWrapper(R.id.wifi_password, this));
}
@Override
public void onStart() {
super.onStart();
Activity activity = getActivity();
NfcAdapter adapter = NfcAdapter.getDefaultAdapter(activity);
if (adapter != null) {
adapter.setNdefPushMessageCallback(this, activity);
}
getLoaderManager().initLoader(LOADER_PROVISIONING_VALUES, null, this);
}
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
if (mProvisioningValues == null) {
return null;
}
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Properties properties = new Properties();
// Store all the values into the Properties object
for (Map.Entry<String, String> e : mProvisioningValues.entrySet()) {
if (!TextUtils.isEmpty(e.getValue())) {
String value;
if (e.getKey().equals(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SSID)) {
// Make sure to surround SSID with double quotes
value = e.getValue();
if (!value.startsWith("\"") || !value.endsWith("\"")) {
value = "\"" + value + "\"";
}
} else {
value = e.getValue();
}
properties.put(e.getKey(), value);
}
}
try {
properties.store(stream, getString(R.string.nfc_comment));
NdefRecord record = NdefRecord.createMime(
DevicePolicyManager.MIME_TYPE_PROVISIONING_NFC, stream.toByteArray());
return new NdefMessage(new NdefRecord[]{record});
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
public void onTextChanged(int id, String s) {
if (mProvisioningValues == null) {
return;
}
switch (id) {
case R.id.package_name:
mProvisioningValues.put(
DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME, s);
break;
case R.id.locale:
mProvisioningValues.put(DevicePolicyManager.EXTRA_PROVISIONING_LOCALE, s);
break;
case R.id.timezone:
mProvisioningValues.put(DevicePolicyManager.EXTRA_PROVISIONING_TIME_ZONE, s);
break;
case R.id.wifi_ssid:
mProvisioningValues.put(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SSID, s);
break;
case R.id.wifi_security_type:
mProvisioningValues.put(
DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SECURITY_TYPE, s);
break;
case R.id.wifi_password:
mProvisioningValues.put(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_PASSWORD, s);
break;
}
}
@Override
public Loader<Map<String, String>> onCreateLoader(int id, Bundle args) {
if (id == LOADER_PROVISIONING_VALUES) {
return new ProvisioningValuesLoader(getActivity());
}
return null;
}
@Override
public void onLoadFinished(Loader<Map<String, String>> loader, Map<String, String> values) {
if (loader.getId() == LOADER_PROVISIONING_VALUES) {
mProvisioningValues = values;
mEditPackageName.setText(values.get(
DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME));
mEditLocale.setText(values.get(DevicePolicyManager.EXTRA_PROVISIONING_LOCALE));
mEditTimezone.setText(values.get(DevicePolicyManager.EXTRA_PROVISIONING_TIME_ZONE));
mEditWifiSsid.setText(values.get(DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SSID));
mEditWifiSecurityType.setText(values.get(
DevicePolicyManager.EXTRA_PROVISIONING_WIFI_SECURITY_TYPE));
mEditWifiPassword.setText(null);
}
}
@Override
public void onLoaderReset(Loader<Map<String, String>> loader) {
// Do nothing
}
}
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