The application doesnt point to where I am at..here is what i have done:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mv=(MapView) findViewById (R.id.mapView);
mv.setBuiltInZoomControls(true);
// mv.setSatellite(true);
mv.setStreetView(true);
lmanager=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
llistener=new MyLocationListener();
lmanager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, llistener);
}
private class MyLocationListener implements LocationListener
{
#Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
if(location!=null)
{
Toast.makeText(getBaseContext(),"Location changed: "+location.getLatitude()+" lang: "+ location.getLongitude() , Toast.LENGTH_SHORT).show(); // no toast is shown
}
p=new GeoPoint((int)(location.getLatitude()*1E6), (int)(location.getLongitude()*1E6));
mapC.animateTo(p);
mapC.setZoom(18);//no zooming happens
}
#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
}
To my manifest I added both of these:
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
first of all sorry for poor english. when the location was changed and you set the value into the map you need to invalidate the map using the invalidate() method of MapView class so you can get the updated value on the map
mapC.animateTo(p);
mapC.setZoom(18);
mv.invalidate();
as well as add after you set the value at initial time set into the map like
mv.setBuiltInZoomControls(true);
mv.setStreetView(true);
mv.invalidate();
Related
i need to get the lat and lon in a activity. In my oncreate method I tried the code below but im not getting anything when i try to print the Lat. What am I doing wrong. I have included in the manifest file too. I need two strings with the value of Lat and lon
LocationManager manager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
LocationListener lis = new LocationListener(){
#Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
Log.d("", "location " + location.getLatitude());
}
#Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
#Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, lis);
Now I;m receiving the GPS location data from android application, and send it to Labview.
However, the decimal number of gps location value changes due to the location.
I want to fix the decimal number such as 7
For example, what I get is 32.33333 but I need 32.333330
How can I declare the value?
Here is the gps value part
private class MyLocationListener implements LocationListener
{
private String gps2;
#Override
public void onLocationChanged(Location loc) {
if (loc != null) {
/* 화면의 상단에 위치한 TextView에 위도, 경도를 출력함*/
gps.setText("La:"+loc.getLatitude()+", Lo:"+loc.getLongitude());
gps2 = gps.getText().toString();
Main.getInstance().sendMessage(gps2);
}
}
#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
}
}
try doing this way
NumberFormat numberFormat = new DecimalFormat("#.000000");
gps.setText("La:"+numberFormat.format(loc.getLatitude())+", Lo:"+numberFormat.format(loc.getLongitude()));
In my application i want to get the updated location of the mobile user and i want to send it to the server continuously after periodic interval of certain time or after the user travels certain(say 500 meter) distance.I need these things to be done in backgroung.I know for this i have to implement service class. But I am not getting exactly how to do this.I did some work on that.
Can anybody please help me in this issue.
I did following things in the service class.
public class BackGroundService extends Service implements LocationListener{
public static final String Tag = BackGroundService.class.getName();
LocationManager myLocationManager;
Location myLocation;
LocationListener myLocationListener;
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public void OnCreate()
{
super.onCreate();
Log.d(Tag, "Service Started");
android.os.Debug.waitForDebugger();
Criteria criteria = new Criteria();
criteria.setPowerRequirement(Criteria.POWER_LOW);
criteria.setAccuracy(Criteria.ACCURACY_LOW);
String locationProvider = myLocationManager.getBestProvider(criteria, true);
myLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
myLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000*60*5, 500, myLocationListener);
myLocation = myLocationManager.getLastKnownLocation(locationProvider);
}
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
longitude = location.getLongitude();
latitude = location.getLatitude();
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
Log.d(Tag, "Provider is disabled");
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
Log.d(Tag, "Location Provider is enabled");
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
From here I want know how can i get current lat/long of user and send it to the server.
Answer for my question is.......
public class LocationService extends Service{
#Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
final LocationManager mlocmag = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
final LocationListener mlocList = new MyLocationList();
final Location loc = mlocmag.getLastKnownLocation(LocationManager.GPS_PROVIDER);
UpdateWithNewLocation(loc); // This method is used to get updated location.
mlocmag.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mlocList);
}
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
}
#Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
}
private void UpdateWithNewLocation(final Location loc) {
// TODO Auto-generated method stub
if(loc!= null)
{
final double lat =loc.getLatitude(); // Updated lat
final double Long = loc.getLongitude(); // Updated long
ConnectMySQL obj = new ConnectMySQL();
obj.call(lat,Long); // Call this method when location is updated and save the data.
}
else
{
String latLongStr = "No lat and longitude found";
Toast.makeText(this, "Your location is "+latLongStr ,Toast.LENGTH_LONG).show();
}
}
public class MyLocationList implements LocationListener
{
public void onLocationChanged(Location arg0) {
// TODO Auto-generated method stub
UpdateWithNewLocation(arg0);
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),"GPS Disable ", Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),"GPS enabled", Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
I am trying to get GPS data without using map view.The code that I have below is from O'Rielly's Programming Android book and is supposed to work but is not. I am using an Android 2.2.1 phone and the app closes immediately after it starts.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvLattitude = (TextView) findViewById(R.id.tvLattitude);
tvLongitude = (TextView) findViewById(R.id.tvLongitude);
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
tvLattitude.setText(Double.toString(loc.getLatitude()));
tvLongitude.setText(Double.toString(loc.getLongitude()));
locListenD = new DispLocListener();
lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);}
private class DispLocListener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
tvLattitude.setText(Double.toString(location.getLatitude()));
tvLongitude.setText(Double.toString(location.getLongitude()));}
#Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
lm.removeUpdates(locListenD);}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);}
Perhaps you need to add the permissions
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
to your manifest?
Well, I set up a similar project and found a problem with your code: in onCreate you immediately try to set the location from previous locations (which on first run obviously wouldn't be available). I erased those lines and the code seems to run fine
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvLattitude = (TextView) findViewById(R.id.tvLattitude);
tvLongitude = (TextView) findViewById(R.id.tvLongitude);
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locListenD = new DispLocListener();
lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);
}
private LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateNearestLocation(location);
}
private boolean updateNearestLocation(Location lastKnownLocation) {
String locationProvider = LocationManager.NETWORK_PROVIDER;
LocationManager m_locationManager = (LocationManager) ctx.getSystemService(Context.LOCATION_SERVICE);
try {
m_locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
} catch (IllegalArgumentException iae) {
Log.i(TAG, "Could not find a location provider");
return false;
}
if (lastKnownLocation == null) {
lastKnownLocation = m_locationManager
.getLastKnownLocation(locationProvider);
} else {
m_locationManager.removeUpdates(locationListener);
}
if (lastKnownLocation != null) {
lastKnownLocation.getLatitude();
lastKnownLocation.getLongitude();
}
}
Perhaps you need to turn on the locations in your phone's settings:
Settings --> Location and Security --> My Location
Also if you are using an emulator keep in mind it won't generate location data unless you do it manually through the DDMS.
I am testing the option to send coordinates to the Android Emulator using the Built in Eclipse tool.But it doesn't seem to receive them.I have this simple code:
public class Main extends MapActivity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MapView view = (MapView) findViewById(R.id.themap);
view.setBuiltInZoomControls(true);
final MapController mp = view.getController();
LocationManager manager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
LocationListener listener = new LocationListener() {
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onLocationChanged(final Location location) {
// TODO Auto-generated method stub
mp.setCenter(new GeoPoint((int)location.getLatitude(), (int)location.getLongitude()));
}
};
manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
}
#Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
I have the permissions for ACCESS_FINE_LOCATION and INTERNET in the Manifest.
If someone has any explanation I would be grateful.
Did you add
<uses-library android:name="com.google.android.maps" />
to the application tag in the manifest?
You also need a MD5 Fingerprint of the SDK Debug Certificate from Google to receive Google Maps data. You can get it here.
Try to put a breakpoint inside the onLocationChanged method and see if it stops when sending the location command to the emulator. this should also work when you don't have a certificate yet.
This works for me.
Listener implementation...
public class MyLocationListener implements LocationListener {
public static final String TAG = "MyLocationListener";
private Context context;
public MyLocationListener(Context c) {
this.context = c;
}
public void onLocationChanged(android.location.Location location) {
Log.d(TAG,"LocationChanged: Lat: "+location.getLatitude()+" Lng: "+location.getLongitude());
}
}
Usage...
MyLocationListener locationListener = new MyLocationListener(this);
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,locationListener);