| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.settings.fuelgauge; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.BatteryManager; |
| import android.os.BatteryStats; |
| import android.os.SystemClock; |
| import com.android.internal.os.BatteryStatsHelper; |
| import com.android.settings.overlay.FeatureFactory; |
| import com.android.settings.utils.AsyncLoader; |
| |
| /** |
| * Loader that can be used by classes to load BatteryInfo in a background thread. This loader will |
| * automatically grab enhanced battery estimates if available or fall back to the system estimate |
| * when not available. |
| */ |
| public class BatteryInfoLoader extends AsyncLoader<BatteryInfo>{ |
| |
| BatteryStatsHelper mStatsHelper; |
| private static final String LOG_TAG = "BatteryInfoLoader"; |
| |
| public BatteryInfoLoader(Context context, BatteryStatsHelper batteryStatsHelper) { |
| super(context); |
| mStatsHelper = batteryStatsHelper; |
| } |
| |
| @Override |
| protected void onDiscardResult(BatteryInfo result) { |
| |
| } |
| |
| @Override |
| public BatteryInfo loadInBackground() { |
| final long startTime = System.currentTimeMillis(); |
| Context context = getContext(); |
| PowerUsageFeatureProvider powerUsageFeatureProvider = |
| FeatureFactory.getFactory(context).getPowerUsageFeatureProvider(context); |
| |
| // Stuff we always need to get BatteryInfo |
| Intent batteryBroadcast = context.registerReceiver(null, |
| new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); |
| final long elapsedRealtimeUs = BatteryUtils.convertMsToUs(SystemClock.elapsedRealtime()); |
| BatteryInfo batteryInfo; |
| |
| // 0 means we are discharging, anything else means charging |
| boolean discharging = batteryBroadcast.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) == 0; |
| // Get enhanced prediction if available and discharging, otherwise use the old code |
| Cursor cursor = null; |
| if (discharging && powerUsageFeatureProvider != null && |
| powerUsageFeatureProvider.isEnhancedBatteryPredictionEnabled(context)) { |
| final Uri queryUri = powerUsageFeatureProvider.getEnhancedBatteryPredictionUri(); |
| cursor = context.getContentResolver().query(queryUri, null, null, null, null); |
| } |
| BatteryStats stats = mStatsHelper.getStats(); |
| BatteryUtils.logRuntime(LOG_TAG, "BatteryInfoLoader post query", startTime); |
| if (cursor != null && cursor.moveToFirst()) { |
| long enhancedEstimate = powerUsageFeatureProvider.getTimeRemainingEstimate(cursor); |
| batteryInfo = BatteryInfo.getBatteryInfo(context, batteryBroadcast, stats, |
| elapsedRealtimeUs, false /* shortString */, |
| BatteryUtils.convertMsToUs(enhancedEstimate), true /* basedOnUsage */); |
| } else { |
| batteryInfo = BatteryInfo.getBatteryInfo(context, batteryBroadcast, stats, |
| elapsedRealtimeUs, false /* shortString */, |
| discharging ? stats.computeBatteryTimeRemaining(elapsedRealtimeUs) : 0, |
| false /* basedOnUsage */); |
| } |
| BatteryUtils.logRuntime(LOG_TAG, "BatteryInfoLoader.loadInBackground", startTime); |
| return batteryInfo; |
| } |
| } |