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; 18 19 import android.content.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import android.os.PowerManager; 24 import android.support.annotation.IntDef; 25 import android.support.annotation.VisibleForTesting; 26 27 import com.android.settings.Utils; 28 import com.android.settings.fuelgauge.batterytip.tips.BatteryTip; 29 30 import java.lang.annotation.Retention; 31 import java.lang.annotation.RetentionPolicy; 32 33 /** 34 * Use this broadcastReceiver to listen to the battery change, and it will invoke 35 * {@link OnBatteryChangedListener} if any of the following has been changed: 36 * 37 * 1. Battery level(e.g. 100%->99%) 38 * 2. Battery status(e.g. plugged->unplugged) 39 * 3. Battery saver(e.g. off->on) 40 */ 41 public class BatteryBroadcastReceiver extends BroadcastReceiver { 42 43 /** 44 * Callback when the following has been changed: 45 * 46 * Battery level(e.g. 100%->99%) 47 * Battery status(e.g. plugged->unplugged) 48 * Battery saver(e.g. off->on) 49 */ 50 public interface OnBatteryChangedListener { onBatteryChanged(@atteryUpdateType int type)51 void onBatteryChanged(@BatteryUpdateType int type); 52 } 53 54 @Retention(RetentionPolicy.SOURCE) 55 @IntDef({BatteryUpdateType.MANUAL, 56 BatteryUpdateType.BATTERY_LEVEL, 57 BatteryUpdateType.BATTERY_SAVER, 58 BatteryUpdateType.BATTERY_STATUS}) 59 public @interface BatteryUpdateType { 60 int MANUAL = 0; 61 int BATTERY_LEVEL = 1; 62 int BATTERY_SAVER = 2; 63 int BATTERY_STATUS = 3; 64 } 65 66 @VisibleForTesting 67 String mBatteryLevel; 68 @VisibleForTesting 69 String mBatteryStatus; 70 private OnBatteryChangedListener mBatteryListener; 71 private Context mContext; 72 BatteryBroadcastReceiver(Context context)73 public BatteryBroadcastReceiver(Context context) { 74 mContext = context; 75 } 76 77 @Override onReceive(Context context, Intent intent)78 public void onReceive(Context context, Intent intent) { 79 updateBatteryStatus(intent, false /* forceUpdate */); 80 } 81 setBatteryChangedListener(OnBatteryChangedListener lsn)82 public void setBatteryChangedListener(OnBatteryChangedListener lsn) { 83 mBatteryListener = lsn; 84 } 85 register()86 public void register() { 87 final IntentFilter intentFilter = new IntentFilter(); 88 intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); 89 intentFilter.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED); 90 91 final Intent intent = mContext.registerReceiver(this, intentFilter); 92 updateBatteryStatus(intent, true /* forceUpdate */); 93 } 94 unRegister()95 public void unRegister() { 96 mContext.unregisterReceiver(this); 97 } 98 updateBatteryStatus(Intent intent, boolean forceUpdate)99 private void updateBatteryStatus(Intent intent, boolean forceUpdate) { 100 if (intent != null && mBatteryListener != null) { 101 if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) { 102 final String batteryLevel = Utils.getBatteryPercentage(intent); 103 final String batteryStatus = Utils.getBatteryStatus( 104 mContext.getResources(), intent); 105 if (forceUpdate) { 106 mBatteryListener.onBatteryChanged(BatteryUpdateType.MANUAL); 107 } else if(!batteryLevel.equals(mBatteryLevel)) { 108 mBatteryListener.onBatteryChanged(BatteryUpdateType.BATTERY_LEVEL); 109 } else if (!batteryStatus.equals(mBatteryStatus)) { 110 mBatteryListener.onBatteryChanged(BatteryUpdateType.BATTERY_STATUS); 111 } 112 mBatteryLevel = batteryLevel; 113 mBatteryStatus = batteryStatus; 114 } else if (PowerManager.ACTION_POWER_SAVE_MODE_CHANGED.equals(intent.getAction())) { 115 mBatteryListener.onBatteryChanged(BatteryUpdateType.BATTERY_SAVER); 116 } 117 } 118 } 119 120 }