How to get notified when battery is fully charged using UILocalNotification?

Question

I'm developing a battery utility app. My app is supposed to fire a local notification when a switch is turned on to notify user when battery is fully charged. However, i've a problem of getting a local notification when the phone is locked and during inactive state. Wondering whether the battery monitoring is running in the background when the phone is locked? Or is there any error in my code execution? I need help seriously. Can someone please help :(

Here's my codes

AppDelegate.m:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
// Override point for customization after application launch.

//Handle launching from a Notification
UILocalNotification *localNotification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];

if(localNotification)
{
    //Set icon badge number to 0
    application.applicationIconBadgeNumber = 0;
}

return YES;}

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{   
UIApplicationState state = [application applicationState];

if(state == UIApplicationStateActive)
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Fully Charged"
                                                    message:notification.alertBody
                                                   delegate:self
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];

    [alert show];
}

//Set icon badge number to 0
application.applicationIconBadgeNumber = 0;}

-(void)ViewDidLoad{

[UIDevice currentDevice].batteryMonitoringEnabled = YES;

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(batteryLevelChanged:) name:UIDeviceBatteryLevelDidChangeNotification object:nil];}

-(void)batteryLevelChanged:(NSNotification *)notification{
[self updateBatteryLevel];

if ([self.notifyFullyChargedSwitch isOn])
{
    [self notifyFullyCharged];
}
}

-(void)updateBatteryLevel{

float batterylevel = [UIDevice currentDevice].batteryLevel;

    static NSNumberFormatter *numberFormatter = nil;

    if(numberFormatter == nil)
    {
        numberFormatter = [[NSNumberFormatter alloc] init];
        [numberFormatter setNumberStyle:NSNumberFormatterPercentStyle];
        [numberFormatter setMaximumFractionDigits:1];
    }

    NSNumber *levelObj = [NSNumber numberWithFloat:batterylevel];
    }

-(void)notifyFullyCharged{

[UIDevice currentDevice].batteryMonitoringEnabled = YES;

float batterylevel = [UIDevice currentDevice].batteryLevel;

if(batterylevel == 1.0){

    // Schedule the notification
    UILocalNotification* localNotification = [[UILocalNotification alloc] init];

    localNotification.fireDate = nil;
    localNotification.alertBody = @"Unplug your device. Your battery has been fully charged.";
    localNotification.alertAction = @"Slide to view";
    localNotification.timeZone = [NSTimeZone defaultTimeZone];
    localNotification.soundName = UILocalNotificationDefaultSoundName;
    localNotification.repeatInterval = NSMinuteCalendarUnit;
    localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}}

What happens when you remove this line: `if(state == UIApplicationStateActive)`? — dasdom, Mar 16 '14 at 14:12
Why do I need to remove that line? If removed, do I still receive any alert view message when I'm in active state? — user3378060, Mar 16 '14 at 14:19
Of course. It's just an if statement AFTER you have received the notification. — dasdom, Mar 16 '14 at 14:33
Alright. Besides this, do you think there're errors somewhere? — user3378060, Mar 16 '14 at 14:48
@user3378060 i am also developing on same concept. what is the notifyFullyChargedSwitch in your code ? can you help me if u got the solution for the same. — Hitarth, Feb 04 '16 at 11:32
Please check the answer here: http://stackoverflow.com/a/35340749/4260691 — OhadM, Feb 11 '16 at 14:07

How to get notified when battery is fully charged using UILocalNotification?

0 Answers0