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Small task for a [login to view URL] + [login to view URL] specialist

Please develop a very simple proof of concept App, that works both in Android and in IOS.

There are only 2 requirements:

1 - The purpose is to keep the App running in background.

In the background, the App must do some operation, like showing some iteration on the screen, or do some calculation.

When you put the App in the background, for example when switching to another App, and then come back to it, the background operation must not only resume, but it must keep working in the background, so I need to see that it did not sleep. The real purpose of this is to call a WebApi (in the real App). The App also should start-up at phone start-up. And even when the App is not open, it should do the background task.

Maybe the Nuget package [login to view URL] is an option.

2 - Use a slider control to let the user choose from some options.

I would like to use the Android slider which is availiable in the phone configuration, when you configure the date and the time. Or something similar, which lets the user choose from a control which assimilates a wheel that he spins.

Delivery must be done within 2 days.

DELIVERABLES: Visual Studio 2017/2019 solution with [login to view URL], [login to view URL], and DotNet Standard 2.x class library projects.

Please place your bids

Квалификация: Android, Xamarin, iPhone

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О работодателе:
( 24 отзыв(-а, -ов) ) São Paulo, Brazil

ID проекта: #20889579

9 фрилансеров(-а) в среднем готовы выполнить эту работу за $101

contact2phpsl

Hi I would appreciate if you please interact with me. I am a Xamarin specialist with extensive experience in developing mobile applications using C#, Net Framework, Xaml, [login to view URL] etc. Have a look at my work sa Больше

$100 USD за 2 дней(-я)
(576 отзывов(-а))
9.2
BlueSky729

How are you I am a professional web and mobile app developer and have full experience for 8 years. I read your project description carefully and I understand what you want. Now i am ready to start your project and u Больше

$25 USD за 7 дней(-я)
(11 отзывов(-а))
5.8
mobileexpert1235

Hi, I have read your description carefully I understood your want. Since 2012, I've started mobile application development for iOS & Android. In the meantime, I've learned lots of mobile programming languages such as S Больше

$25 USD за 7 дней(-я)
(15 отзывов(-а))
5.3
JinTai

Hello! For your business. I am very interested about your project. If you think something, I will implement as like your idea. Because I have talented skills for your project, you will be always satisfied so far. Your Больше

$200 USD за 7 дней(-я)
(7 отзывов(-а))
3.4
popov4sa

hello ! I have gone through your job posting and become very much interested to work with you. I am an expert in this field. I have already completed several projects like this. Awaiting an affirmative response from Больше

$25 USD за 7 дней(-я)
(1 отзыв)
2.6
WhitebirdH

Deer Employer! I have read your details carefully and it seems like I'm the best fit for you. I am a mobile app developer with 5+years experiences . I have rich experiences in Android, iPhone, C++, Matlab, Java, Photo Больше

$200 USD за 7 дней(-я)
(1 отзыв)
0.4
sunearthmoon

Hi Dear! Today have read your job, very interested it and think this project is for me. It's the most appropriate project I can complete perfectly. As a senior developer and earned rich experience for over 3 years Больше

$50 USD за 7 дней(-я)
(0 отзывов(-а))
0.0
rvtechsolution

Hi I am Android and iOS APPs expert having 7+ years experience and ready to develop a very simple proof of concept App, that works both in Android and in IOS. Please share more details. Kindly initiate the Больше

$250 USD за 10 дней(-я)
(6 отзывов(-а))
0.0
hassangraf

Hi, I'm a Full Stack Developer having more than 6 years of Professional Experience in Software React.js, React native, Mobile Apps development using react native. I assure you 100% quality work for Small task for a Больше

$30 USD за 2 дней(-я)
(0 отзывов(-а))
0.0