android - 为手机或平板电脑充电时的能量流入

Question

我想知道是否可以测量移动设备(IOS 或 Android)在充电时流过多少能量？例如，以瓦特每小时或毫安每小时为单位。

基本上，我想测量我从充电中获取了多少电量。是否有相应的 native 或低级 API？

谢谢你的帮助

Answer 1

安卓

Battery level checking Android

Battery level checking Android 1

查看演示:Battery Demo Android

iOS

是的，在 iOS 设备中，当您为设备充电时，您可以获得有关电池状态的信息。您的 batteryLevelChanged 和 batteryStateChanged

通知

查看演示:Batterry Demo iOS

注意:在 iOS 设备中运行此演示。不是模拟器。

// Register for battery level and state change notifications.
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(batteryLevelChanged:)
                                                 name:UIDeviceBatteryLevelDidChangeNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(batteryStateChanged:)
                                                 name:UIDeviceBatteryStateDidChangeNotification object:nil];

updateBatteryLevel 代码:

- (void)updateBatteryLevel
{
    float batteryLevel = [UIDevice currentDevice].batteryLevel;
    if (batteryLevel < 0.0) {
        // -1.0 means battery state is UIDeviceBatteryStateUnknown
        self.levelLabel.text = NSLocalizedString(@"Unknown", @"");
    }
    else {
        static NSNumberFormatter *numberFormatter = nil;
        if (numberFormatter == nil) {
            numberFormatter = [[NSNumberFormatter alloc] init];
            [numberFormatter setNumberStyle:NSNumberFormatterPercentStyle];
            [numberFormatter setMaximumFractionDigits:1];
        }

        NSNumber *levelObj = [NSNumber numberWithFloat:batteryLevel];
        self.levelLabel.text = [numberFormatter stringFromNumber:levelObj];
    }
}

- (void)updateBatteryState
{
    NSArray *batteryStateCells = @[self.unknownCell, self.unpluggedCell, self.chargingCell, self.fullCell];

    UIDeviceBatteryState currentState = [UIDevice currentDevice].batteryState;

    for (int i = 0; i < [batteryStateCells count]; i++) {
        UITableViewCell *cell = (UITableViewCell *) batteryStateCells[i];

        if (i + UIDeviceBatteryStateUnknown == currentState) {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
        }
        else {
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
    }
}