1 /*
2  * Copyright (C) 2017 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 
17 package com.android.carrierdefaultapp;
18 
19 import android.app.job.JobInfo;
20 import android.app.job.JobParameters;
21 import android.app.job.JobScheduler;
22 import android.app.job.JobService;
23 import android.content.ComponentName;
24 import android.content.Context;
25 import android.content.Intent;
26 import android.net.ConnectivityManager;
27 import android.net.Network;
28 import android.net.NetworkCapabilities;
29 import android.provider.Settings;
30 import android.util.Log;
31 
32 import com.android.internal.telephony.TelephonyIntents;
33 
34 /**
35  * Service to run {@link android.app.job.JobScheduler} job.
36  * Service to monitor when there is a change to conent URI
37  * {@link android.provider.Settings.Global#DEVICE_PROVISIONED DEVICE_PROVISIONED}
38  */
39 public class ProvisionObserver extends JobService {
40 
41     private static final String TAG = ProvisionObserver.class.getSimpleName();
42     public static final int PROVISION_OBSERVER_REEVALUATION_JOB_ID = 1;
43     // minimum & maximum update delay TBD
44     private static final int CONTENT_UPDATE_DELAY_MS = 100;
45     private static final int CONTENT_MAX_DELAY_MS = 200;
46 
47     @Override
onStartJob(JobParameters jobParameters)48     public boolean onStartJob(JobParameters jobParameters) {
49         switch (jobParameters.getJobId()) {
50             case PROVISION_OBSERVER_REEVALUATION_JOB_ID:
51                 if (isProvisioned(this)) {
52                     Log.d(TAG, "device provisioned, force network re-evaluation");
53                     final ConnectivityManager connMgr = ConnectivityManager.from(this);
54                     Network[] info = connMgr.getAllNetworks();
55                     for (Network nw : info) {
56                         final NetworkCapabilities nc = connMgr.getNetworkCapabilities(nw);
57                         if (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
58                                 && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
59                             // force connectivity re-evaluation to assume skipped carrier actions.
60                             // one of the following calls will match the last evaluation.
61                             connMgr.reportNetworkConnectivity(nw, true);
62                             connMgr.reportNetworkConnectivity(nw, false);
63                             break;
64                         }
65                     }
66                 }
67             default:
68                 break;
69         }
70         return false;
71     }
72 
73     @Override
onStopJob(JobParameters jobParameters)74     public boolean onStopJob(JobParameters jobParameters) {
75         return false;
76     }
77 
78     // Returns true if the device is not provisioned yet (in setup wizard), false otherwise
isProvisioned(Context context)79     private static boolean isProvisioned(Context context) {
80         return Settings.Global.getInt(context.getContentResolver(),
81                 Settings.Global.DEVICE_PROVISIONED, 0) == 1;
82     }
83 
84     /**
85      * Static utility function to schedule a job to execute upon the change of content URI
86      * {@link android.provider.Settings.Global#DEVICE_PROVISIONED DEVICE_PROVISIONED}.
87      * @param context The context used to retrieve the {@link ComponentName} and system services
88      * @return true carrier actions are deferred due to phone provisioning process, false otherwise
89      */
isDeferredForProvision(Context context, Intent intent)90     public static boolean isDeferredForProvision(Context context, Intent intent) {
91         if (isProvisioned(context)) {
92             return false;
93         }
94         int jobId;
95         switch(intent.getAction()) {
96             case TelephonyIntents.ACTION_CARRIER_SIGNAL_REDIRECTED:
97                 jobId = PROVISION_OBSERVER_REEVALUATION_JOB_ID;
98                 break;
99             default:
100                 return false;
101         }
102         final JobScheduler jobScheduler =  (JobScheduler) context.getSystemService(
103                 Context.JOB_SCHEDULER_SERVICE);
104         final JobInfo job = new JobInfo.Builder(jobId,
105                 new ComponentName(context, ProvisionObserver.class))
106                 .addTriggerContentUri(new JobInfo.TriggerContentUri(
107                         Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED), 0))
108                 .setTriggerContentUpdateDelay(CONTENT_UPDATE_DELAY_MS)
109                 .setTriggerContentMaxDelay(CONTENT_MAX_DELAY_MS)
110                 .build();
111         jobScheduler.schedule(job);
112         return true;
113     }
114 }
115