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 package com.android.settings.fuelgauge;
17 
18 import android.content.ContentResolver;
19 import android.content.Context;
20 import android.database.ContentObserver;
21 import android.os.Handler;
22 import android.os.Looper;
23 import android.os.PowerManager;
24 import android.provider.Settings;
25 import android.provider.Settings.Global;
26 
27 import androidx.preference.Preference;
28 import androidx.preference.PreferenceScreen;
29 
30 import com.android.settings.R;
31 import com.android.settings.Utils;
32 import com.android.settings.core.BasePreferenceController;
33 import com.android.settingslib.core.lifecycle.LifecycleObserver;
34 import com.android.settingslib.core.lifecycle.events.OnStart;
35 import com.android.settingslib.core.lifecycle.events.OnStop;
36 import com.android.settingslib.fuelgauge.BatterySaverUtils;
37 
38 public class BatterySaverController extends BasePreferenceController
39         implements LifecycleObserver, OnStart, OnStop, BatterySaverReceiver.BatterySaverListener {
40     private static final String KEY_BATTERY_SAVER = "battery_saver_summary";
41     private final BatterySaverReceiver mBatteryStateChangeReceiver;
42     private final PowerManager mPowerManager;
43     private Preference mBatterySaverPref;
44 
BatterySaverController(Context context)45     public BatterySaverController(Context context) {
46         super(context, KEY_BATTERY_SAVER);
47 
48         mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
49         mBatteryStateChangeReceiver = new BatterySaverReceiver(context);
50         mBatteryStateChangeReceiver.setBatterySaverListener(this);
51         BatterySaverUtils.revertScheduleToNoneIfNeeded(context);
52     }
53 
54     @Override
getAvailabilityStatus()55     public int getAvailabilityStatus() {
56         return AVAILABLE_UNSEARCHABLE;
57     }
58 
59     @Override
getPreferenceKey()60     public String getPreferenceKey() {
61         return KEY_BATTERY_SAVER;
62     }
63 
64     @Override
displayPreference(PreferenceScreen screen)65     public void displayPreference(PreferenceScreen screen) {
66         super.displayPreference(screen);
67         mBatterySaverPref = screen.findPreference(KEY_BATTERY_SAVER);
68     }
69 
70     @Override
onStart()71     public void onStart() {
72         mContext.getContentResolver().registerContentObserver(
73                 Settings.Global.getUriFor(Settings.Global.LOW_POWER_MODE_TRIGGER_LEVEL)
74                 , true, mObserver);
75 
76         mBatteryStateChangeReceiver.setListening(true);
77         updateSummary();
78     }
79 
80     @Override
onStop()81     public void onStop() {
82         mContext.getContentResolver().unregisterContentObserver(mObserver);
83         mBatteryStateChangeReceiver.setListening(false);
84     }
85 
86     @Override
getSummary()87     public CharSequence getSummary() {
88         final ContentResolver resolver = mContext.getContentResolver();
89         final boolean isPowerSaveOn = mPowerManager.isPowerSaveMode();
90         final int percent = Settings.Global.getInt(resolver,
91                 Settings.Global.LOW_POWER_MODE_TRIGGER_LEVEL, 0);
92         final int mode = Settings.Global.getInt(resolver,
93                 Global.AUTOMATIC_POWER_SAVE_MODE, PowerManager.POWER_SAVE_MODE_TRIGGER_PERCENTAGE);
94         if (isPowerSaveOn) {
95             return mContext.getString(R.string.battery_saver_on_summary);
96         } else if (mode == PowerManager.POWER_SAVE_MODE_TRIGGER_PERCENTAGE) {
97             if (percent != 0) {
98                 return mContext.getString(R.string.battery_saver_off_scheduled_summary,
99                         Utils.formatPercentage(percent));
100             } else {
101                 return mContext.getString(R.string.battery_saver_off_summary);
102             }
103         } else {
104             return mContext.getString(R.string.battery_saver_auto_routine);
105         }
106     }
107 
updateSummary()108     private void updateSummary() {
109         mBatterySaverPref.setSummary(getSummary());
110     }
111 
112     private final ContentObserver mObserver = new ContentObserver(
113             new Handler(Looper.getMainLooper())) {
114         @Override
115         public void onChange(boolean selfChange) {
116             updateSummary();
117         }
118     };
119 
120     @Override
onPowerSaveModeChanged()121     public void onPowerSaveModeChanged() {
122         updateSummary();
123     }
124 
125     @Override
onBatteryChanged(boolean pluggedIn)126     public void onBatteryChanged(boolean pluggedIn) {
127     }
128 }
129