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Android - Basic Steps (Location & Maps)

Location

Is composed by

  • Latitude
  • Longitude
  • Time-stamp
  • Accuracy
  • Altitude
  • Speed
  • Bearing

LocationProvider

Types:
  • Network 
    • Wifi access points
    • Cell phone towers
  • GPS
  • Passive
    • Piggyback on the readings requested by other application
Permissions
  • Network 
    • android.permission.ACCESS_COARSE_LOCATION
    • android.permission.ACCESS_FINE_LOCATION
  • GPS
    • android.permission.ACCESS_FINE_LOCATION
  • Passive Provider
    • android.permission.ACCESS_FINE_LOCATION

LocationManager

System service for accessing location data

  • getSystemService( Context.LOCATION_SERVICE )
Functions
  • Determine the last known user location
  • Register for location update
  • Register to receive intents when the device nears or move away from a given geographic area

LocationListener

Defines callbacks methods that are called when Location or LocationProvider status change.

Methods
  • onLocationChanged(...)
  • onProviderDisabled(...)
  • onProviderEnabled(...)
  • onStatusChanged(...)

Optain a Location

  • Location Provider - Start listening for updates
  • Maintain a "current best estimate" of location
  • When estimate is "good enough", stop listening for location updates
  • Use best location estimate

Maps

Classes

  • GoogleMap
  • MapFragment
  • Camera
    • Establish which part of the map can be visible in the cellphone
  • Marker

Setup Maps Application

  • Set up Google Play Serivces SDK
  • Obtain an API Key
  • Specify settings in Application Manifest
  • Add map to project

Maps Permissions


  • android.permission.INTERNET
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.WRITE_EXTERNAL_STORAGE
  • android.permission.WRITE_EXTERNAL_STORAGE
  • com.google.android.providers.gsf.permission.READ_GSERVICES

Configuration

  • In the project select 
    • rightclick project->properties->Android->
      • In the section Library select Add
      • Select google-play-service_lib


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