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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 android.support.v7.mms;
import android.content.Context;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;
/**
* The default implementation of loader of UA and UAProfUrl
*/
class DefaultUserAgentInfoLoader implements UserAgentInfoLoader {
// Default values to be used as user agent info
private static final String DEFAULT_USER_AGENT = "Android MmsLib/1.0";
private static final String DEFAULT_UA_PROF_URL =
"http://www.gstatic.com/android/sms/mms_ua_profile.xml";
private Context mContext;
private boolean mLoaded;
private String mUserAgent;
private String mUAProfUrl;
DefaultUserAgentInfoLoader(final Context context) {
mContext = context;
}
@Override
public String getUserAgent() {
load();
return mUserAgent;
}
@Override
public String getUAProfUrl() {
load();
return mUAProfUrl;
}
private void load() {
if (mLoaded) {
return;
}
boolean didLoad = false;
synchronized (this) {
if (!mLoaded) {
loadLocked();
mLoaded = true;
didLoad = true;
}
}
if (didLoad) {
Log.i(MmsService.TAG, "Loaded user agent info: "
+ "UA=" + mUserAgent + ", UAProfUrl=" + mUAProfUrl);
}
}
private void loadLocked() {
if (Utils.hasUserAgentApi()) {
// load the MMS User agent and UaProfUrl from TelephonyManager APIs
final TelephonyManager telephonyManager = (TelephonyManager) mContext.getSystemService(
Context.TELEPHONY_SERVICE);
mUserAgent = telephonyManager.getMmsUserAgent();
mUAProfUrl = telephonyManager.getMmsUAProfUrl();
}
if (TextUtils.isEmpty(mUserAgent)) {
mUserAgent = DEFAULT_USER_AGENT;
}
if (TextUtils.isEmpty(mUAProfUrl)) {
mUAProfUrl = DEFAULT_UA_PROF_URL;
}
}
}
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