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      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.settings.fuelgauge.anomaly.checker;
     18 
     19 import android.content.Context;
     20 import android.os.BatteryStats;
     21 import android.os.SystemClock;
     22 import android.support.annotation.VisibleForTesting;
     23 import android.text.format.DateUtils;
     24 import android.util.ArrayMap;
     25 
     26 import com.android.internal.os.BatterySipper;
     27 import com.android.internal.os.BatteryStatsHelper;
     28 import com.android.settings.Utils;
     29 import com.android.settings.fuelgauge.BatteryUtils;
     30 import com.android.settings.fuelgauge.anomaly.Anomaly;
     31 import com.android.settings.fuelgauge.anomaly.AnomalyDetectionPolicy;
     32 import com.android.settings.fuelgauge.anomaly.AnomalyUtils;
     33 import com.android.settings.fuelgauge.anomaly.action.AnomalyAction;
     34 
     35 import java.util.ArrayList;
     36 import java.util.List;
     37 
     38 /**
     39  * Check whether apps have unoptimized bluetooth scanning in the background
     40  */
     41 public class BluetoothScanAnomalyDetector implements AnomalyDetector {
     42     private static final String TAG = "BluetoothScanAnomalyDetector";
     43     @VisibleForTesting
     44     BatteryUtils mBatteryUtils;
     45     private long mBluetoothScanningThreshold;
     46     private Context mContext;
     47     private AnomalyUtils mAnomalyUtils;
     48 
     49     public BluetoothScanAnomalyDetector(Context context) {
     50         this(context, new AnomalyDetectionPolicy(context), AnomalyUtils.getInstance(context));
     51     }
     52 
     53     @VisibleForTesting
     54     BluetoothScanAnomalyDetector(Context context, AnomalyDetectionPolicy policy,
     55             AnomalyUtils anomalyUtils) {
     56         mContext = context;
     57         mBatteryUtils = BatteryUtils.getInstance(context);
     58         mBluetoothScanningThreshold = policy.bluetoothScanThreshold;
     59         mAnomalyUtils = anomalyUtils;
     60     }
     61 
     62     @Override
     63     public List<Anomaly> detectAnomalies(BatteryStatsHelper batteryStatsHelper) {
     64         // Detect all apps if targetPackageName is null
     65         return detectAnomalies(batteryStatsHelper, null /* targetPackageName */);
     66     }
     67 
     68     @Override
     69     public List<Anomaly> detectAnomalies(BatteryStatsHelper batteryStatsHelper,
     70             String targetPackageName) {
     71         final List<BatterySipper> batterySippers = batteryStatsHelper.getUsageList();
     72         final List<Anomaly> anomalies = new ArrayList<>();
     73         final int targetUid = mBatteryUtils.getPackageUid(targetPackageName);
     74         final long elapsedRealtimeMs = SystemClock.elapsedRealtime();
     75 
     76         for (int i = 0, size = batterySippers.size(); i < size; i++) {
     77             final BatterySipper sipper = batterySippers.get(i);
     78             final BatteryStats.Uid uid = sipper.uidObj;
     79             if (uid == null
     80                     || mBatteryUtils.shouldHideSipper(sipper)
     81                     || (targetUid != BatteryUtils.UID_NULL && targetUid != uid.getUid())) {
     82                 continue;
     83             }
     84 
     85             final long bluetoothTimeMs = getBluetoothUnoptimizedBgTimeMs(uid, elapsedRealtimeMs);
     86             if (bluetoothTimeMs > mBluetoothScanningThreshold) {
     87                 final String packageName = mBatteryUtils.getPackageName(uid.getUid());
     88                 final CharSequence displayName = Utils.getApplicationLabel(mContext,
     89                         packageName);
     90 
     91                 Anomaly anomaly = new Anomaly.Builder()
     92                         .setUid(uid.getUid())
     93                         .setType(Anomaly.AnomalyType.BLUETOOTH_SCAN)
     94                         .setDisplayName(displayName)
     95                         .setPackageName(packageName)
     96                         .setBluetoothScanningTimeMs(bluetoothTimeMs)
     97                         .build();
     98 
     99                 if (mAnomalyUtils.getAnomalyAction(anomaly).isActionActive(anomaly)) {
    100                     anomalies.add(anomaly);
    101                 }
    102             }
    103         }
    104 
    105         return anomalies;
    106     }
    107 
    108     @VisibleForTesting
    109     public long getBluetoothUnoptimizedBgTimeMs(BatteryStats.Uid uid, long elapsedRealtimeMs) {
    110         BatteryStats.Timer timer = uid.getBluetoothUnoptimizedScanBackgroundTimer();
    111 
    112         return timer != null ? timer.getTotalDurationMsLocked(elapsedRealtimeMs) : 0;
    113     }
    114 
    115 }
    116