1 /*
2  * Copyright (C) 2022 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.server.healthconnect.logging;
18 
19 import android.annotation.NonNull;
20 import android.content.Context;
21 import android.health.HealthFitnessStatsLog;
22 import android.os.UserHandle;
23 
24 import java.util.Objects;
25 
26 /**
27  * Logs Health Connect usage stats.
28  *
29  * @hide
30  */
31 final class UsageStatsLogger {
32 
33     /** Write Health Connect usage stats to statsd. */
log(@onNull Context context, @NonNull UserHandle userHandle)34     static void log(@NonNull Context context, @NonNull UserHandle userHandle) {
35         Objects.requireNonNull(userHandle);
36         Objects.requireNonNull(context);
37 
38         UsageStatsCollector usageStatsCollector = new UsageStatsCollector(context, userHandle);
39         usageStatsCollector.upsertLastAccessLogTimeStamp();
40         int numberOfConnectedApps = usageStatsCollector.getPackagesHoldingHealthPermissions();
41         int numberOfAvailableApps =
42                 usageStatsCollector.getNumberOfAppsCompatibleWithHealthConnect();
43         boolean isUserMonthlyActive = usageStatsCollector.isUserMonthlyActive();
44 
45         // If this condition is true then the user does not uses HC and we should not collect data.
46         // This will reduce the load on logging service otherwise we will get daily data from
47         // billions of Android devices.
48         if (numberOfConnectedApps == 0 && numberOfAvailableApps == 0 && !isUserMonthlyActive) {
49             return;
50         }
51 
52         HealthFitnessStatsLog.write(
53                 HealthFitnessStatsLog.HEALTH_CONNECT_USAGE_STATS,
54                 numberOfConnectedApps,
55                 numberOfAvailableApps,
56                 isUserMonthlyActive);
57     }
58 }
59