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/*
* Copyright (C) 2007-2008 Esmertec AG.
* Copyright (C) 2007-2008 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.android.mms.transaction;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.provider.Telephony.Sms.Intents;
/**
* Handle incoming SMSes. Just dispatches the work off to a Service.
*/
public class SmsReceiver extends BroadcastReceiver {
static final Object mStartingServiceSync = new Object();
static PowerManager.WakeLock mStartingService;
private static SmsReceiver sInstance;
public static SmsReceiver getInstance() {
if (sInstance == null) {
sInstance = new SmsReceiver();
}
return sInstance;
}
@Override
public void onReceive(Context context, Intent intent) {
onReceiveWithPrivilege(context, intent, false);
}
protected void onReceiveWithPrivilege(Context context, Intent intent, boolean privileged) {
// If 'privileged' is false, it means that the intent was delivered to the base
// no-permissions receiver class. If we get an SMS_RECEIVED message that way, it
// means someone has tried to spoof the message by delivering it outside the normal
// permission-checked route, so we just ignore it.
if (!privileged && intent.getAction().equals(Intents.SMS_RECEIVED_ACTION)) {
return;
}
// same thing applies to the send-queued-messages request: it can be used to send
// SMS without having the SEND_SMS permission
if (!privileged && intent.getAction().equals(SmsReceiverService.ACTION_SEND_MESSAGE)) {
return;
}
intent.setClass(context, SmsReceiverService.class);
intent.putExtra("result", getResultCode());
beginStartingService(context, intent);
}
// N.B.: <code>beginStartingService</code> and
// <code>finishStartingService</code> were copied from
// <code>com.android.calendar.AlertReceiver</code>. We should
// factor them out or, even better, improve the API for starting
// services under wake locks.
/**
* Start the service to process the current event notifications, acquiring
* the wake lock before returning to ensure that the service will run.
*/
public static void beginStartingService(Context context, Intent intent) {
synchronized (mStartingServiceSync) {
if (mStartingService == null) {
PowerManager pm =
(PowerManager)context.getSystemService(Context.POWER_SERVICE);
mStartingService = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
"StartingAlertService");
mStartingService.setReferenceCounted(false);
}
mStartingService.acquire();
context.startService(intent);
}
}
/**
* Called back by the service when it has finished processing notifications,
* releasing the wake lock if the service is now stopping.
*/
public static void finishStartingService(Service service, int startId) {
synchronized (mStartingServiceSync) {
if (mStartingService != null) {
if (service.stopSelfResult(startId)) {
mStartingService.release();
}
}
}
}
}
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