1 /**
2  * Copyright (C) 2019 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 package android.ext.services.notification;
17 
18 import static android.provider.Telephony.Sms.Intents.ACTION_DEFAULT_SMS_PACKAGE_CHANGED_INTERNAL;
19 
20 import android.annotation.Nullable;
21 import android.content.BroadcastReceiver;
22 import android.content.ComponentName;
23 import android.content.Context;
24 import android.content.Intent;
25 import android.content.IntentFilter;
26 import android.util.Log;
27 
28 import com.android.internal.telephony.SmsApplication;
29 
30 /**
31  * A helper class for storing and retrieving the default SMS application.
32  */
33 public class SmsHelper {
34     private static final String TAG = "SmsHelper";
35 
36     private final Context mContext;
37     private ComponentName mDefaultSmsApplication;
38     private BroadcastReceiver mBroadcastReceiver;
39 
SmsHelper(Context context)40     SmsHelper(Context context) {
41         mContext = context.getApplicationContext();
42     }
43 
initialize()44     void initialize() {
45         if (mBroadcastReceiver == null) {
46             mDefaultSmsApplication = SmsApplication.getDefaultSmsApplication(mContext, false);
47             mBroadcastReceiver = new BroadcastReceiver() {
48                 @Override
49                 public void onReceive(Context context, Intent intent) {
50                     if (ACTION_DEFAULT_SMS_PACKAGE_CHANGED_INTERNAL.equals(intent.getAction())) {
51                         mDefaultSmsApplication =
52                                 SmsApplication.getDefaultSmsApplication(mContext, false);
53                     } else {
54                         Log.w(TAG, "Unknown broadcast received: " + intent.getAction());
55                     }
56                 }
57             };
58             mContext.registerReceiver(
59                     mBroadcastReceiver,
60                     new IntentFilter(ACTION_DEFAULT_SMS_PACKAGE_CHANGED_INTERNAL));
61         }
62     }
63 
destroy()64     void destroy() {
65         if (mBroadcastReceiver != null) {
66             mContext.unregisterReceiver(mBroadcastReceiver);
67             mBroadcastReceiver = null;
68         }
69     }
70 
71     @Nullable
getDefaultSmsApplication()72     public ComponentName getDefaultSmsApplication() {
73         return mDefaultSmsApplication;
74     }
75 }
76