CellBroadcastHandler.java revision fce951e90d421ba2ab3da3f64d0f5192ab769e22 
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.SubscriptionManager;
27import android.telephony.SmsCbMessage;
28
29/**
30 * Dispatch new Cell Broadcasts to receivers. Acquires a private wakelock until the broadcast
31 * completes and our result receiver is called.
32 */
33public class CellBroadcastHandler extends WakeLockStateMachine {
34
35    private CellBroadcastHandler(Context context, PhoneBase phone) {
36        this("CellBroadcastHandler", context, phone);
37    }
38
39    protected CellBroadcastHandler(String debugTag, Context context, PhoneBase phone) {
40        super(debugTag, context, phone);
41    }
42
43    /**
44     * Create a new CellBroadcastHandler.
45     * @param context the context to use for dispatching Intents
46     * @return the new handler
47     */
48    public static CellBroadcastHandler makeCellBroadcastHandler(Context context, PhoneBase phone) {
49        CellBroadcastHandler handler = new CellBroadcastHandler(context, phone);
50        handler.start();
51        return handler;
52    }
53
54    /**
55     * Handle Cell Broadcast messages from {@code CdmaInboundSmsHandler}.
56     * 3GPP-format Cell Broadcast messages sent from radio are handled in the subclass.
57     *
58     * @param message the message to process
59     * @return true if an ordered broadcast was sent; false on failure
60     */
61    @Override
62    protected boolean handleSmsMessage(Message message) {
63        if (message.obj instanceof SmsCbMessage) {
64            handleBroadcastSms((SmsCbMessage) message.obj);
65            return true;
66        } else {
67            loge("handleMessage got object of type: " + message.obj.getClass().getName());
68            return false;
69        }
70    }
71
72    /**
73     * Dispatch a Cell Broadcast message to listeners.
74     * @param message the Cell Broadcast to broadcast
75     */
76    protected void handleBroadcastSms(SmsCbMessage message) {
77        String receiverPermission;
78        int appOp;
79        Intent intent;
80        if (message.isEmergencyMessage()) {
81            log("Dispatching emergency SMS CB");
82            intent = new Intent(Telephony.Sms.Intents.SMS_EMERGENCY_CB_RECEIVED_ACTION);
83            receiverPermission = Manifest.permission.RECEIVE_EMERGENCY_BROADCAST;
84            appOp = AppOpsManager.OP_RECEIVE_EMERGECY_SMS;
85        } else {
86            log("Dispatching SMS CB");
87            intent = new Intent(Telephony.Sms.Intents.SMS_CB_RECEIVED_ACTION);
88            receiverPermission = Manifest.permission.RECEIVE_SMS;
89            appOp = AppOpsManager.OP_RECEIVE_SMS;
90        }
91        intent.putExtra("message", message);
92        SubscriptionManager.putPhoneIdAndSubIdExtra(intent, mPhone.getPhoneId());
93        mContext.sendOrderedBroadcast(intent, receiverPermission, appOp, mReceiver,
94                getHandler(), Activity.RESULT_OK, null, null);
95    }
96}
97