Write an Android application

The main idea of this project is to create a software that reproduce an ultrasonic sound which can be read and interpret it by a mobile device.

The project has 2 principal steps; at the moment we only want the first one waiting for the client’s feedback.

The first step consists in:

• A way to create an ultrasonic sound in a sound format (.mp3, .wav, etc…) in a form way. It can be HTML or similar.

o Example: we introduce the sentence Hello World and it’s transformed to an ultrasonic sound and save it on the hard disk.

• Create an API which can be introduced in an app (at the moment only Android) where the ultrasonic sound is interpreted.

o The app has to maintain the mobile device microphone open. At the moment in foreground while the app is running in an Android device.

• When the app receives and interprets the ultrasonic sound, it has to send this information to a Database.

o The database, at the moment, only has to have a table with 3 rows: ID, time when the message has sent and the sentence.


• The sound has to have a 0.20 to 2 seconds length.

• The sound has to be inaudible.

• You are free to use any database but we like more the SQL.

• We would like to have a postmortem document where you explain the steps you did and the main problems you found if you want.

• We would appreciate a commented and clear code.

• We will count on you for the second step (more extended) if we like your result.

Compétences : Android, HTML, Javascript, Mobile App Development, SQL

Voir plus : Write-Android-application-13162149, https://www.freelancer.com/projects/Mobile-Phone/Write-Android-application-for-post/, Write Android application similar temple run, php/Write-Android-application-11839450, freelancer write android application, write-android-application-project, write-android-application-post-product/, write-android-application-for-sms-project, write-android-application-for-product/, Write-Android-application, write android application , write android application project, write android application 2, write android application --2, write android application creating user form

Concernant l'employeur :
( 0 commentaires ) Spain

N° du projet : #15178166

102 freelance ont fait une offre moyenne de 2419 € pour ce travail


Dear Sir, I have read everything & understood the scope of this project. I have also discussed with my technical team lead to make sure that there are no issues, so we are good to go & ready to start this project im Plus

2777 € EUR en 60 jours
(70 Commentaires)

I have mobile app( Android, IOS) , php and backend skill. I have experience with Social app, Dating app, Chatting app, Video Streamming, IPTV app, Uber style App , Restaurant/Food Deliver app Relevant Skills and Exper Plus

2368 € EUR en 30 jours
(277 Commentaires)

Hello, An average Android user spends 2 hours and 15 minutes per day on apps. Android has 2 billion monthly active users with 87.5% global mobile operating system market share and more than 4000 different types of Plus

1500 € EUR en 30 jours
(71 Commentaires)

CLEAN AND FAST SENIOR MOBILE DEVELOPER!!! Hello, Dear. I'm developing Mobile app to the order of clients for 6+ years. I have rich experience in development of apps. These are apps that I made. [url removed, login to view] Plus

2500 € EUR en 30 jours
(82 Commentaires)

Hi, Nice to meet you. Create ultrasonic sound file and communicating mobile app and database is no problem for me. Because I have made the app similar with this before. Please check my profile. Relevant Skills and Exp Plus

2500 € EUR en 30 jours
(140 Commentaires)

-----------------Hello----------------- ***Let's built successful project together*** [url removed, login to view] This is my [url removed, login to view] profile and please check my profile. As you see, I Plus

2500 € EUR en 30 jours
(73 Commentaires)

Hi, I'm a talented developer for iOS, Android and have 8 years full time development experience. I have already developed a great number of various applications, namely on-demand services, location-based apps, Plus

3000 € EUR en 30 jours
(91 Commentaires)

Hi, I've checked your requirements and I am much interested to assist you on the development of your Project with fulfilling all of the required functioning very accurately and elegantly. Relevant Skills and Experien Plus

2500 € EUR en 30 jours
(116 Commentaires)

******* Full Time Mobile and backend developer for 7 years. ****** Dear ! [url removed, login to view] As you see in my profile, I have successfully delivered 180+ Android/ iOS apps for cli Plus

2368 € EUR en 30 jours
(116 Commentaires)

How are you today? I have checked your project description in carefully. I am sure i can do your project within your timeline and budget. I am a full time mobile developer with 5+ good experience I can start your Plus

2368 € EUR en 30 jours
(89 Commentaires)

How are you? I am a Mobile & Web developer who have 10 years experience of program develop and 5 + years in mobile. I think my skills are enough for this project, I am interested in your idea . so I want to chat Plus

2250 € EUR en 30 jours
(79 Commentaires)
2500 € EUR en 30 jours
(74 Commentaires)

Let's go together for your project. How are you today? I am a full stack developer who has over 5 years experience in app development. I will always deliver you ERROR-FREE and OUTSTANDING quality project in a ti Plus

2500 € EUR en 30 jours
(37 Commentaires)

Dear Client,Hope you doing well. I have gone through your requirement and as per my previous work experience i am ready to start work immediately on your project. yes i am very much expertise with Java script,XC Plus

2000 € EUR en 30 jours
(62 Commentaires)

Hello, I am an iOS expert and have rich experience in mobile app development. During my previous development, I have completed various apps including Google map app, Health & Fitness app, Social Networking App. Plus

2500 € EUR en 30 jours
(32 Commentaires)

Please have a look at our portfolio for Mobile App and Unity Game based projects: Relevant Skills and Experience [url removed, login to view] [url removed, login to view] Plus

1500 € EUR en 30 jours
(124 Commentaires)

Hello Sir! I have very big interesting about your project. Your app idea is very special and interesting. If you select me, probably we will move to step2 . For it, I will work hard. Please contact me so that to Plus

2500 € EUR en 30 jours
(46 Commentaires)

Hello, I have 6 years of experienced on mobile application and development web services I have gone through your project requirement specification and as per my previous experience with this I am capable to do this Plus

2500 € EUR en 30 jours
(127 Commentaires)

How are you? I am a senior developer with extensive experience in building high quality Mobile apps, Games & Web. When I work on a project, I strive for excellence and 100% client satisfaction. Having an idea Plus

2500 € EUR en 30 jours
(38 Commentaires)

Hello, Below is the brief of project scope ►►Project Title- -Android Mobile Application Development. Relevant Skills and Experience Doctar app [url removed, login to view] Snow and Mow-- [url removed, login to view] Plus

5000 € EUR en 50 jours
(25 Commentaires)