battery

How to get battery level with 1 % accuracy . [UIDevice currentDevice].batteryLevel Will give battery level with accuracy of 5%. But i recently used Battery Doctor App on my iphone 4S running ios 5.1, which is giving battery level with 1% accuracy . Anyone has any idea , how can we get that accuracy ... I have tried and searched a lot but not getting how they are calculating it .. Thanks in advance... Nandan Sawant Starting with iOS 8, [UIDevice currentDevice].batteryLevel provides 1% accuracy :) If you turn off Setting->General->Usage->Battery Percentage, Battery Doctor shows your battery

I am developing an application that periodically sends information to an external server. I make a local copy of the data being sent, for backup purposes. What is the best option to store the data in terms of saving battery life ? Each data submission is a serialized object (the class has 5 fields, including a date, numbers and strings) of about 5K-10K. Any other idea? I have no idea in terms of battery life directly but one criteria would be which is easier to manage? Fewer operations to manage the data would mean fewer CPU cycles and in turn longer battery life. I would say the SQLite option

I have a simple question. How do I get iPhone's battery level? [UIDevice currentDevice] batteryLevel] Simple enough? However there is a little catch - I can't use UIKit . Here is what I wrote so far, but I don't think it works: // notification port IONotificationPortRef nport = IONotificationPortCreate(kIOMasterPortDefault); CFRunLoopAddSource(CFRunLoopGetCurrent(), IONotificationPortGetRunLoopSource(nport), kCFRunLoopDefaultMode); CFMutableDictionaryRef matching = IOServiceMatching("IOPMPowerSource"); kern_return_t kr = IOServiceAddMatchingNotification(nport, kIOFirstMatchNotification,

So... I'm making an application for Android. The application needs to send and receive realtime chat data (needs to be a socket) but it also needs to send commands (which don't as the client knows when it is sending something). I need to know what is a better solution in terms of saving the user's battery. a) Opening and Closing the connection every time a command is sent, if the chat tab is opened then keep the connection constant. b) Keep the connection constant all the time. I've taken a look around the internet but have gotten mixed answers, some say keeping a persistent connection is bad

On my nexus one, there is a handy app reachable from Settings > About Phone > Battery use. I'd like to StartActivity() that app from one of my Activities. I can see in the log that when Settings runs it, this intent is logged: Starting activity: Intent { act=android.intent.action.MAIN cmp=com.android.settings/.fuelgauge.PowerUsageSummary } I'm having trouble relating that to something in Android Java source. I can't even find "fuelgauge" in the GIT source. Can anyone point me to the right file, or anything else helpful, like how to create the right kind of Intent? Thanks Peter Code is as