Design and implementation of cross-platform friends-positioning mobile App based on Phonegap and HTML5

Hybrid App is mainly realized by calling each other by JavaScript (JS) and Native, so it implements the mechanism of ‘one development, multi operation’, so it can be called the real cross-platform development. The most striking difference of Hypertext Markup Language 5 (HTML5) and JavaScript from WebApp is that they call the bottom function encapsulated by NativeApp. Hybrid App is characterized by cross-platform as it uses the browser as engine; it has the similar development costs while the far more development efficiency compared with NativeApp. This paper used HybridApp development mode to develop by taking Android platform as the example; with the help of online map service and query interface of MAP WORLD, the foreground show and map interaction were implemented by Openlayers map frame; users' information data was managed by Sqlite embedded database; the mobile devices information were acquired by calling each other by PhonedGap frame and mobile devices; functions like friends-positioning, enquiry POI and north arrow, etc., were realized in this App. This paper also elaborated the prospects and application value of Hybrid App in future mobile development.