You can check the coordinates, and see if they fit within some area, right? I assume your 'target area' is some polygon, and you simply check whether your user's point is inside it. Do you know how to communicate with a server? You can read a Java networking tutorial, open up a socket and do an http post, or rest, or whatever to communicate with the server. (Since you're doing this I suppose you already have one in mind, this sounds like it might be a good rest situation.)
By the way, it's probably not great to send the information as often as possible, that sounds like a real nice way to kill the battery.. Buuut, it sounds like in your particular situation you might assume that the phone is plugged in (perhaps not a great assumption, but whatever.) On Tue, Jan 10, 2012 at 8:59 PM, coollearner <[email protected]> wrote: > I would like to share what i have prepared so far and at the same time > ask for assistance and suggestions on the next coding steps needed. > > Based from short and basic java and android training and online > resources, I have come up with the following theoretical code that has > the following objectives (theoretical because I didn’t test it yet): > > explicitly select the GPS provider (GPS/cell/wifi) to know the phone’s > location > dislays the current location in a textview > connects to a server via 3g > sends the latitude, longitude and timestamp as frequently as possible > to a server > Below is the code that I prepared: > > import android.app.Activity; > import android.content.Context; > import android.location.Criteria; > import android.location.Location; > import android.location.LocationListener; > import android.location.LocationManager; > import android.os.Bundle; > import android.telephony.TelephonyManager; > import android.util.Log; > import android.widget.TextView; > import java.io.IOException; > import java.io.PrintWriter; > import java.net.Socket; > import java.net.UnknownHostException; > > public class GpsActivity extends Activity { > > private LocationManager lm; > private LocationListener locationListener; > public static TelephonyManager tm; > public static TextView tv; > public static Socket s; > public static PrintWriter out; > > > /** > * Called when the activity is first created. > */ > @Override > public void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > /** > * retrieve a reference to provide access to information about the > telephony services on the device > */ > tm = (TelephonyManager) > getSystemService(Context.TELEPHONY_SERVICE); > setContentView(R.layout.main); > /** > * retrieve a reference to provide access to the system location > services > */ > lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); > > > /** > * explicitly select the GPS provider, create a set of Criteria and > let android choose the best provider available > */ > > Criteria criteria = new Criteria(); > criteria.setAccuracy(Criteria.ACCURACY_FINE); > criteria.setAltitudeRequired(false); > criteria.setBearingRequired(false); > criteria.setCostAllowed(true); > criteria.setPowerRequirement(Criteria.POWER_LOW); > String provider = lm.getBestProvider(criteria, true); > /** > * This method takes in four parameters: > provider: The name of the provider with which you register > minTime: The minimum time interval for notifications, in milliseconds. > minDistance: The minimum distance interval for notifications, in > meters. > listener: An object whose onLocationChanged() method will be called > for each location update. > */ > locationListener = new MyLocationListener(); > lm.requestLocationUpdates(provider, 0, 0, locationListener); > > tv = (TextView) findViewById(R.id.textView1); > tv.setText("I currently have no Location Data."); > > } > > /** > * Connects the Android Client to a given server > * > * @param name > * The name of the remote server > * @param port > * Port number to connect to at the remote server. > * @throws IOException > * @throws UnknownHostException > */ > public static void connect(String name, int port) > throws UnknownHostException, IOException > { > > s = new Socket(name, port); > out = new PrintWriter(s.getOutputStream(), true); > } > > /** > * Sends a string message to the server. > * > * @param msg > * The message to be sent. > * @throws IOException > */ > public static void send(String msg) throws IOException > { > if (!s.isClosed() && msg != null) > { > out.println(msg); > if (msg.contains("CMD_QUIT")) > { > out.close(); > s.close(); > Log.i("ServerConnection", "Client Disconnected."); > } > } > } > > > private class MyLocationListener implements LocationListener{ > > @Override > public void onLocationChanged(Location loc) { > String txt = "Latitude:" + loc.getLatitude() + "/nLongitude:" > + loc.getLongitude(); > Log.i("GeoLocation", "My current location is:\n " + txt); > tv.setText("My current location is:\n" + txt); > String msg = loc.getLongitude() + "\n" + loc.getLatitude() + > "\n" > + loc.getTime(); > > try > { > connect("IP address", 27960); > send("CMD_HELLO"); > send(msg); > send("CMD_QUIT"); > } catch (UnknownHostException e) > { > // TODO Auto-generated catch block > e.printStackTrace(); > } catch (IOException e) > { > // TODO Auto-generated catch block > e.printStackTrace(); > } > } > > > > @Override > public void onProviderDisabled(String provider) { > // TODO Auto-generated method stub > > } > > @Override > public void onProviderEnabled(String provider) { > // TODO Auto-generated method stub > > } > > @Override > public void onStatusChanged(String provider, int status, Bundle > extras) { > // TODO Auto-generated method stub > > } > > } > > PLEASE HELP > > 1. Kindly comment if the code above will meet the four objectives > given. > 2. HOW CAN I MEET MY 5th objective ----- I want the android > application to start to trigger connecting to server and sending the > latitude and longitude only when the phone (being used in a car) is > within a road area ( say an area 1km x 30m ). It is continuously > listening to its location but will start sending to server once it > enters the area and will continuously send and will stop only once it > exit the area. > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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