Android Consultant - high performance improments

Presupuesto €12 - €25 EUR / hour
Ofertas 20
Oferta promedio €17
Estado Cerrado

We are looking for Android developer to help us optimize following code:

// this code transforms bitmap for printing in Black and White for Receipt Printer using ESC/POS commands.

for (int i = 0; i < height; i++) {

for (int x = 0; x < tmp; x++)

data[x] = 0;

for (int x = startx; x < width; x++) {

final int pixel = [url removed, login to view](x - startx, i);

if ([url removed, login to view](pixel) == 0 || [url removed, login to view](pixel) == 0

|| [url removed, login to view](pixel) == 0) {

data[x / 8] += 128 >> (x % 8); // (byte) (128 >> (y % 8));



// write(data);


This code is used to transform Bitmap to BW image for printing. On larger images like 400x1000px this has too many iterations and takes 2-5 seconds to compute. We need faster much way. Only bids with genuine response to this particular problem will be accepted.

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Ofertas en este proyecto

  • apps2009 Profile Picture


    ahmedabad,  India

    - Diversified experience in Android & having know of iOS, Blackberry & J2ME. I have worked independently as well as in a group to mitigate the challenges like logically and technically. - Indepth knowledge and understanding of .NET/PHP Web Services & APIs. - Total 5+ Years of Experience in Android Application development. - Having knowlege in .NET, ASP.NET ADO.Net, and SQL 2008 - Having knowledge in HTML5, CSS3, Java Script, jQuery and Angular Js - Fundmental knowlege of C/C++ - Played dual roles of Android Lead and Developer.

  • jcganon Profile Picture


    Mont-Royal,  Canada

    I am very passionate and experienced Web and Mobile developer. Expertise in Codeigniter, Android, iOS Native Application Development. Over last 7+ years we have gained expertise in PHP Custom development, Android, iOS Mobile application development as well as frameworks. We have developed many applications on Android, iPhone/iPad which makes our portfolio rich with mobile platform. I am searching for the best opportunity to grow myself and my company. - I will keep the following rules: 1) Fast, High quality and in-time delivery 2) Updates of work at specific interval 3) Android Market/App Store submission 4) Responsive after service for 1 month My expertise lies in mobile app development with - PHP, MySQL, HTML/HTML5.0, JSON, AJAX, CODEIGNITER - Backend, Web service (SOAP/REST), Telephony, RSS - Facebook, Twitter, Youtube - Googe Map, Geo/Reverse-Geo, GPS - Push and local notification - Calendar, Alarm, Countdown

  • TechnoAppMaster Profile Picture


    India,  India

    With 5 years of experience, I have developed a many mobile applications in different context, professional and personal. In terms of Android I am familiar with all components like Push Notification, Sqlite, Camera, Media, Fragments, Broadcast Receiver, Services, Gps and many more. I am reliable, passionate by what I do and I pay lot of attention to details and More Importantly I enjoy to architect new apps with latest technology trends. Professional Summary • Software Developer with 5 yrs of experience in developing mobile Android applications • Possesses Strong Knowledge of Android & internal of Android • Strong experience from mobile GUI design • Hands on experience in optimizing memory & memory leak on Mobile • Expert in architects app so it can survive long in mobile market • Expert in third party library integration & development on top of them. • Expert in Google Play Services, Android Wearable Apps, Location Sensitive apps, Sms, Receiver apps, Excel, CVC, Barcode, Qrcode etc.

  • qitsol Profile Picture


    Rawalpindi,  Pakistan

    ***Awarded featured freelancer award - Dec -2013. *** - 150+ IPhone / Android apps completed - 100+ clients satisfied - Over 250 jobs completed on Freelancer. - PAY ONLY WHEN YOU SEE PROGRESS (MILESTONES). We have over 6 years experience in designing and developing mobile apps using IOS, IPhone, IPad, Android and games in Unity. We do provide services in the following areas: - Mobile development (IOS 8, IPhone, IPad, Android, Phonegap, Titanium, Corona, Unity , Adengine, Mobile games). - Microsoft Dynamics ( CRM, AX, GP). - Microsoft Sharepoint (2013, Office 365, MOSS). - Web Development ( Wordpress, Magento, Drupal, Joomla, Ruby on Rails, PHP, .Net). We love to work with milestones or phases. (Pay only when you are happy.) We can start ASAP, say today. Highest completion rate on PAY ONLY WHEN YOU ARE HAPPY. (Milestones) Looking forward to working as a long term partner. Regards, Quality IT Solutions (qitsol) Team.

  • bondwp322 Profile Picture


    Vientiane,  Lao People's Democratic Republic

    We are High-Skilled Experts in Android, IOS, PHP, Laravel, Website Development, Information Security, Computer Security and Project Management Work. We know all CMS and have Rich Experience. The Clients are always the FIRST in all of our works. We'll be here and do our best for YOU. Features: 1. Uber & Chatting App System, which includes Android, and IOS apps and Web Service Backend. 2. Laravel, WP & Woo Projects like PSD to WP & Woo , Plugin Development and works related to these. 3. Project management work, Computer Security, Information Security and Encrypted Communication. 4. 1 Year Bug Free Support in our Work(Our Code Should not be Touched at all for one year Free Support). 5. 100% Milestone Creation at start and release with Progress . 6. Regular Update from our Side. 7. Work Hours : 15hrs/day(except Weekend). Our Visions: "High Quality, High Speed, High Satisfaction!" We hope to work with You.

  • WienFuJong Profile Picture


    Vientian,  Lao People's Democratic Republic

    Thanks for visit my history. My strong technique is C/C++ programing, OCR, OpenCV, java, Android, IPhone, JSP with J2EE platform and open source framework such as JSF JBOSS strust, spring3.I have designed C/C++,Java Web Projects by UML design pattern. I am very glad to provide for clients the best products and services. Thank you.

  • vuongthanhlam001 Profile Picture


    Hau Giang,  Vietnam

    Java, Android, Json, Mysql, web scraper...

  • dverdugo Profile Picture


    Concepción,  Chile

    I work to achieve your satisfaction and give my 100%. I am determined and I never stop until I have come to the end and achieved my purpose. ---------------------------------------------------------------------------------- >MOBILE APP: Android >DATABASE: The apps are synchronized with the database (Create a Social Network or Instant messaging). >WEBSITE: Presentation of mobile app >GRAPHIC : logo and mockcups ------------------------------------------------------------------------------- 1. Languages : Java(Android Studio), Swift(Xcode), Php, Mysql, Erlang(Ejabberd), Html and CSS. >24 X 7 reply and support on skype. >work hard to achieve the project objectives and complete it on time. >working all days -3:00 GMT( 8AM - 8PM ),if you need a quick project, I work more hours during the day.

  • meFreelancer247 Profile Picture


    Hyderabad,  India

    ***Thanks for visiting my profile*** Its me here with 6 years of experience in coding and designing.. I stepped into this Industry with lot of confidence and now I can code anything. I believe in job satisfaction rather than anything. * Programming:- Android, iOS, WordPress, PHP, Objective-C, Swift, Java * Web Technologies:- HTML4/5, CSS 2/3, JavaScript, Bootstrap, JSON​, Photoshop * Database:- Mysql, SQLite. * IDE: Eclipse, Android Studio, Codeigniter, Xcode, Appcelerator, Phonegap * API Integration:- Google Map API & Google Analytics, Facebook, Twitter, LinkedIn, Amazon Web service, Twilio, Quickblox, Clickatell and so more. * Source Control:- Github, Bitbucket * Payment gateway integration: PayPal, Skrill, Stripe, etc and I like updating myself everyday.. I can assure for * 15 Hours / Day communication * On - Time Delivery * Daily Updates/Status * Responsibilty * Client Satisfaction. Come to me with confidence and I will give more than what you expect..

  • jefioliveira Profile Picture


    São Paulo,  Brazil

    I'm software developer with three year of experience, currently work with java, focused in android apps with connections restrictions and hardware restrictions. Solid knowledge in developing enterprise applications for the Android platform, version 2.2 onwards, applying solutions using web services RESTFul, data modeling natively or through ORM, online maps and offline, development geofence techniques, web development services through the platform Google App Engine application and publication management. Mainly use the Android platform (JAVA) for application development and maintenance. Currently I have published applications in the store (Google Play). Mention: Alarmecast