CellBroadcastHandler.java revision d2feaf918ab0c1173d4ada182532e48d0c0d3f77 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.telephony;
18
19import android.Manifest;
20import android.app.Activity;
21import android.app.AppOpsManager;
22import android.content.Context;
23import android.content.Intent;
24import android.os.Message;
25import android.provider.Telephony;
26import android.telephony.SmsCbMessage;
27
28/**
29 * Dispatch new Cell Broadcasts to receivers. Acquires a private wakelock until the broadcast
30 * completes and our result receiver is called.
31 */
32public class CellBroadcastHandler extends WakeLockStateMachine {
33
34    private CellBroadcastHandler(Context context) {
35        this("CellBroadcastHandler", context, null);
36    }
37
38    protected CellBroadcastHandler(String debugTag, Context context, PhoneBase phone) {
39        super(debugTag, context, phone);
40    }
41
42    /**
43     * Create a new CellBroadcastHandler.
44     * @param context the context to use for dispatching Intents
45     * @return the new handler
46     */
47    public static CellBroadcastHandler makeCellBroadcastHandler(Context context) {
48        CellBroadcastHandler handler = new CellBroadcastHandler(context);
49        handler.start();
50        return handler;
51    }
52
53    /**
54     * Handle Cell Broadcast messages from {@code CdmaInboundSmsHandler}.
55     * 3GPP-format Cell Broadcast messages sent from radio are handled in the subclass.
56     *
57     * @param message the message to process
58     * @return true if an ordered broadcast was sent; false on failure
59     */
60    @Override
61    protected boolean handleSmsMessage(Message message) {
62        if (message.obj instanceof SmsCbMessage) {
63            handleBroadcastSms((SmsCbMessage) message.obj);
64            return true;
65        } else {
66            loge("handleMessage got object of type: " + message.obj.getClass().getName());
67            return false;
68        }
69    }
70
71    /**
72     * Dispatch a Cell Broadcast message to listeners.
73     * @param message the Cell Broadcast to broadcast
74     */
75    protected void handleBroadcastSms(SmsCbMessage message) {
76        String receiverPermission;
77        int appOp;
78        Intent intent;
79        if (message.isEmergencyMessage()) {
80            log("Dispatching emergency SMS CB");
81            intent = new Intent(Telephony.Sms.Intents.SMS_EMERGENCY_CB_RECEIVED_ACTION);
82            receiverPermission = Manifest.permission.RECEIVE_EMERGENCY_BROADCAST;
83            appOp = AppOpsManager.OP_RECEIVE_EMERGECY_SMS;
84        } else {
85            log("Dispatching SMS CB");
86            intent = new Intent(Telephony.Sms.Intents.SMS_CB_RECEIVED_ACTION);
87            receiverPermission = Manifest.permission.RECEIVE_SMS;
88            appOp = AppOpsManager.OP_RECEIVE_SMS;
89        }
90        intent.putExtra("message", message);
91        mContext.sendOrderedBroadcast(intent, receiverPermission, appOp, mReceiver,
92                getHandler(), Activity.RESULT_OK, null, null);
93    }
94}
95