© 2009 Research In Motion Limited Introduction to GPS and Wi-Fi technology on BlackBerry smartphones

© 2009 Research In Motion Limited Agenda This course covers the following topics: –Introduction to developing applications for mobile devices –Methods of application development for mobile devices –Introduction to GPS and Wi-Fi® technology on BlackBerry® smartphones

Agenda –Introduction to push technology –Data structures and memory management on mobile devices –User interface design for mobile devices –BlackBerry themes and animated graphics –Security considerations for developing applications for mobile devices

Introduction to GPS and Wi-Fi technology on BlackBerry smartphones Objectives: –Define GPS. –Describe the functionality of GPS on BlackBerry smartphones. –Identify the limitations and benefits of using GPS on a BlackBerry smartphone. –Define Wi-Fi for BlackBerry smartphones. –Describe the functionality of Wi-Fi on BlackBerry smartphones. –Identify the limitations and benefits of using Wi-Fi on a BlackBerry smartphone. © 2009 Research In Motion Limited GPSGlobal Positioning System

© 2009 Research In Motion Limited GPS technology

© 2009 Research In Motion Limited GPS technology –Location information comes from satellites that continually transmit position information. –BlackBerry smartphone applications can use GPS location information for the following: Turn-by-turn navigation Share current location with others Geotag photographs Provide users with targeted promotions and alerts based on their current location

GPS technology To use GPS location data in a BlackBerry application, use the Location API for Java® ME in the javax.microedition.location package (JSR 179).

GPS technology – JSR 179 Commonly used classes: –LocationProvider is the engine. –Criteria is passed to LocationProvider to define the type of GPS fix. –Location is the set of location data (coordinates, direction, and speed) generated by LocationProvider.

GPS technology – JSR 179 Commonly used interfaces: –LocationListener Receives updated location data from LocationProvider at specified intervals Detects when GPS information is or becomes unavailable –ProximityListener Detects proximity to a specified set of coordinates

GPS technology – information sources Three fix types: –Cellsite –Autonomous –Assisted

GPS technology – cellsite fix –Gets location information of the cell tower the mobile device is currently using –When possible, uses cell tower triangulation to provide more accurate information –Gets location information from the cellular network, rather than from GPS satellites

GPS technology – cellsite fix Advantages: –Fast TTFF –Consumes very little power Disadvantages: –Least accurate of the fix types (accurate to within 100 meters) –Typically available only on CDMA and i-DEN networks –User can incur a cost for using the network TTFFtime to first fix

GPS technology – autonomous fix –Location information comes directly from orbiting GPS satellites.

GPS technology – autonomous fix Advantages: –Accurate to within 30 meters –Does not require network coverage Disadvantages: –Highest power consumption –Slowest TTFF (up to two minutes), because the receiving device has to search for satellite signals

GPS technology – assisted fix –The BlackBerry smartphone communicates with the PDE server on the wireless network to determine GPS satellite locations. –Location information comes from GPS satellites. PDEposition determining entity

GPS technology – assisted fix Advantages: –Very accurate (within 30 meters) –Much shorter TTFF than autonomous GPS Disadvantages: –Higher power consumption than cellsite fixes (but lower than autonomous fixes) –Requires network coverage –Users can incur some costs

GPS technology – BlackBerry Maps Integrate your application with BlackBerry® Maps: –Open BlackBerry Maps from your application. –Place a menu item in BlackBerry Maps that launches your application. –Open BlackBerry Maps from the BlackBerry® Browser.

© 2009 Research In Motion Limited Wi-Fi technology

–Wi-Fi networks are not owned and operated by wireless service providers. –To set up a Wi-Fi network, connect a wireless router to a broadband modem with Internet access. –The area covered by the Wi-Fi network is called a hotspot.

Wi-Fi technology –If the BlackBerry smartphone uses BlackBerry® Mobile Data System or BlackBerry® Internet Service to connect, it switches automatically to Wi-Fi when it enters a hotspot (least cost routing). –You can configure your application to: Use Wi-Fi Detect the Wi-Fi capabilities of the BlackBerry smartphone Retrieve status information about the Wi-Fi connection

Wi-Fi technology – advantages Advantages: –No wireless network fees –Very fast –Less susceptible to interference Disadvantages: –Very limited range (up to 50 meters) –Less secure than mobile networks

Introduction to GPS and Wi-Fi technology on BlackBerry smartphones Objectives review: –Define GPS. –Describe the functionality of GPS on BlackBerry smartphones. –Identify the limitations and benefits of using GPS on a BlackBerry smartphone. –Define Wi-Fi for BlackBerry smartphones. –Describe the functionality of Wi-Fi on BlackBerry smartphones. –Identify the limitations and benefits of using Wi-Fi on a BlackBerry smartphone. © 2009 Research In Motion Limited