1 /* 2 * Copyright (C) 2021 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 android.hardware; 18 19 import android.annotation.FloatRange; 20 import android.annotation.IntDef; 21 import android.os.BatteryManager; 22 23 import java.lang.annotation.Retention; 24 import java.lang.annotation.RetentionPolicy; 25 26 /** 27 * The BatteryState class is a representation of a single battery on a device. 28 */ 29 public abstract class BatteryState { 30 /** @hide */ 31 @Retention(RetentionPolicy.SOURCE) 32 @IntDef(prefix = { "STATUS_" }, value = { 33 STATUS_UNKNOWN, 34 STATUS_CHARGING, 35 STATUS_DISCHARGING, 36 STATUS_NOT_CHARGING, 37 STATUS_FULL 38 }) 39 public @interface BatteryStatus { 40 } 41 42 /** Battery status is unknown. */ 43 public static final int STATUS_UNKNOWN = BatteryManager.BATTERY_STATUS_UNKNOWN; 44 /** Battery is charging. */ 45 public static final int STATUS_CHARGING = BatteryManager.BATTERY_STATUS_CHARGING; 46 /** Battery is discharging. */ 47 public static final int STATUS_DISCHARGING = BatteryManager.BATTERY_STATUS_DISCHARGING; 48 /** Battery is connected to power but not charging. */ 49 public static final int STATUS_NOT_CHARGING = BatteryManager.BATTERY_STATUS_NOT_CHARGING; 50 /** Battery is full. */ 51 public static final int STATUS_FULL = BatteryManager.BATTERY_STATUS_FULL; 52 53 /** 54 * Check whether the hardware has a battery. 55 * 56 * @return True if the hardware has a battery, else false. 57 */ isPresent()58 public abstract boolean isPresent(); 59 60 /** 61 * Get the battery status. 62 * 63 * @return the battery status. 64 */ getStatus()65 public abstract @BatteryStatus int getStatus(); 66 67 /** 68 * Get remaining battery capacity as float percentage [0.0f, 1.0f] of total capacity 69 * Returns NaN when battery capacity can't be read. 70 * 71 * @return the battery capacity. 72 */ getCapacity()73 public abstract @FloatRange(from = -1.0f, to = 1.0f) float getCapacity(); 74 } 75