public DeviceBatteryMetricsCollector()

in metrics/src/main/java/com/facebook/battery/metrics/devicebattery/DeviceBatteryMetricsCollector.java [53:102]
40 lines of code
5 McCabe index (conditional complexity)

  public DeviceBatteryMetricsCollector(Context context) {
    mContext = context;

    // Initialize the current state
    mIsCurrentlyCharging = isCharging(getBatteryIntent());
    mLastUpdateMs = SystemClock.elapsedRealtime();

    // Init the intentFilter
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(Intent.ACTION_POWER_CONNECTED);
    intentFilter.addAction(Intent.ACTION_POWER_DISCONNECTED);

    // Register the receiver for power connected and disconnected
    // This is not very accurate after targeting SDK 26
    context.registerReceiver(
        new BroadcastReceiver() {
          @Override
          public void onReceive(Context context, Intent intent) {
            long now = SystemClock.elapsedRealtime();
            synchronized (DeviceBatteryMetricsCollector.this) {
              switch (intent.getAction()) {
                case Intent.ACTION_POWER_CONNECTED:
                  if (!mIsCurrentlyCharging) {
                    mBatteryRealtimeMs += (now - mLastUpdateMs);
                  } else {
                    // This should not happen
                    mChargingRealtimeMs += (now - mLastUpdateMs);
                    logIncorrectSequence("CONNECTED", now);
                  }
                  mIsCurrentlyCharging = true;
                  break;

                case Intent.ACTION_POWER_DISCONNECTED:
                  if (mIsCurrentlyCharging) {
                    mChargingRealtimeMs += (now - mLastUpdateMs);
                  } else {
                    // This should not happen
                    mBatteryRealtimeMs += (now - mLastUpdateMs);
                    logIncorrectSequence("DISCONNECTED", now);
                  }
                  mIsCurrentlyCharging = false;
                  break;
                default:
              }
              mLastUpdateMs = now;
            }
          }
        },
        intentFilter);
  }