My app includes activity of getting coordinates of my current location and then showing the route to a destination for which i have given the coordinates.The problem is it takes hours to load the map and get the route.If anybody could suggest me how to get it done at a faster rate please.And i'm using The Map application present in mobile for getting the map functionality.
Here's the code i'm using
package com.map;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Toast;
public class MapRouteActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
mlocManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, mlocListener);
}
public class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " + "Latitud = " + loc.getLatitude() +"Longitud = " + loc.getLongitude();
Toast.makeText( getApplicationContext(),Text,Toast.LENGTH_SHORT).show();
Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
Uri.parse("http://maps.google.com/maps?saddr="+loc.getLatitude()+","+loc.getLongitude()+"&daddr=18.5204303,73.8567437"));
startActivity(intent);
}
#Override
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Disabled",Toast.LENGTH_SHORT ).show();
}
#Override
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
}
GPS takes time to get a fix. It has to scan a lot of frequencies before it actually triangluates your position. The code that you have written launches Google Maps on getting a valid fix. ( on onLocationChanged() )
Instead you may use MapView. That way your map will be loaded much faster and you don't even have to wait for a proper fix.
Related
my android application can detect longitude and latitude. but it take some time. my app has 9 activates and last activity should send location to data base. any one can give a solution for this. i want to detect location soon as possible, what did missed in my code?
package com.example.zlocation;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
public class MainActivity extends Activity implements LocationListener{
protected LocationManager locationManager;
protected LocationListener locationListener;
protected Context context;
protected TextView txtLat;
String lat;
String provider;
protected String latitude,longitude;
protected boolean gps_enabled,network_enabled;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtLat = (TextView) findViewById(R.id.textView1);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
}
#Override
public void onLocationChanged(Location location) {
txtLat = (TextView) findViewById(R.id.textView1);
txtLat.setText("Latitude:" + location.getLatitude() + ", Longitude:" + location.getLongitude());
}
#Override
public void onProviderDisabled(String provider) {
Log.d("Latitude","disable");
}
#Override
public void onProviderEnabled(String provider) {
Log.d("Latitude","enable");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("Latitude","status");
}
}
You are trying to get the location from gps provider.The problem with gps is however vit is accurate but it takes time in starting the gps and providing a location it can take anything from 2-30 seconds to provide the location if you want location as soon as possible have a look at fused location provider by google and implement it in that you can define the time after you want the location updates or from my personal experience i would suggest you to have a look at littlefluffy location library it is easier to implement.
i recently asked a question for implementation of toast message when the GPS is not enabled.
of this i knew it was possible.
Is it possible to automatically activate the GPS function in the background.
When i remotely activate the application in the background. can i activate the GPS from the phone itself aswell without the other phone reporting anything to the user ?
the situation is like this.
we have a project named ParentalControl Application. So a parent has to be able to track its child remotely.
does anyone have suggestion or ideas ... ?
if it is of anyhelp
this is the code i'm using at the moment.
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity
{
TextView TxtLat;
TextView TxtLong;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TxtLat = (TextView) findViewById(R.id.TxtLat);
TxtLong = (TextView) findViewById(R.id.TxtLong);
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
// implementation of TOASTS
if (!lm.isProviderEnabled(LocationManager.GPS_PROVIDER))
{
Toast toast= Toast.makeText(MainActivity.this, " You can improve the accuracy by turning on the GPS", Toast.LENGTH_SHORT);
toast.show();
}
LocationListener ll = new myLocationListener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
}
class myLocationListener implements LocationListener
{
#Override
public void onLocationChanged(Location location)
{
if (location != null)
{
double pLong = location.getLongitude();
double pLat = location.getLatitude();
TxtLat.setText(Double.toString(pLat));
TxtLong.setText(Double.toString(pLong));
}
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
}
}
}
I am trying to find my current location for an android project. When the application is loaded my current location is always null. I have set up the permissions in the manifest etc. When I find the current location I intend to use the coordinates to find distances to other locations on the map. My code snippet is below. Why do i always get a null value?
Here is my code:-
package com.example.location;
import android.content.Context;
import android.location.LocationManager;
import android.os.Bundle;
import android.location.Location;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import android.location.LocationListener;
import com.google.android.maps.MapController;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
public class MainActivity extends MapActivity implements LocationListener {
private MapView mapView;
private LocationManager locManager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//fetch the map view from the layout
MapView mapView = (MapView) findViewById(R.id.mapview);
//make available zoom controls
mapView.setBuiltInZoomControls(true);
//latitude and longitude of Rome
double lat = 33.6667;
double lon = 73.1667;
//create geo point
GeoPoint point = new GeoPoint((int)(lat * 1E6), (int)(lon *1E6));
//get the MapController object
MapController controller = mapView.getController();
//animate to the desired point
controller.animateTo(point);
//set the map zoom to 13
// zoom 1 is top world view
controller.setZoom(13);
// invalidate the map in order to show changes
**mapView.invalidate();
// Use the location manager through GPS
locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0,
0, this);
//get the current location (last known location) from the location manager
Location location = locManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
Toast.makeText(
this,
"Current location:\nLatitude: " + location.getLatitude()
+ "\n" + "Longitude: " + location.getLongitude(),
Toast.LENGTH_LONG).show(); }
else {
Toast.makeText(this, "Cannot fetch current location!",
Toast.LENGTH_LONG).show();
}**
//when the current location is found – stop listening for updates (preserves battery)
locManager.removeUpdates(this);
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
#Override
protected void onPause() {
super.onPause();
locManager.removeUpdates(this); //activity pauses => stop listening for updates
}
#Override
public void onLocationChanged(Location location) {
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
Look at this example. very good example for doing things like you want.
http://mobile.tutsplus.com/tutorials/android/android-sdk-build-a-mall-finder-app-points-of-interest/
First I apologize for the duplication, I know this question was asked and I tried to follow up the existing answers, but it wont work. So if you can please see my code and say what is wrong or missing, that would help me a lot.
Here's the activity, it uses only the Log (no GUI).
import android.app.Activity;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
public class MainActivity extends Activity implements LocationListener {
private LocationManager lManager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if (lManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
lManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
0, 0, this);
else
Log.i("Test", "network provider unavailable");
Location lastKnownLocation =
lManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (lastKnownLocation != null) {
Log.i("Test", lastKnownLocation.getLatitude() + ", "
+ lastKnownLocation.getLongitude());
lManager.removeUpdates(this);
} else
Log.i("Test", "null");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void onLocationChanged(Location location) {
Log.i("Test", "location changed: " + location.getLatitude() + ", "
+ location.getLongitude());
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
when I try to run the app everything seems to work but latitude and longitude wont show on the log. I am using a real device with network location on for testing.
The reason I couldn't get the location is the cellular company does not give that information (NETWORK_PROVIDER uses cellular antenna triangulation to determine location. Cellular company can provide or deny you this information).
I had service that run by BrodcastReceiver which suppose to run and give me the GPS data that I requested and I stopped it after I did what suppose to be done, but I notice that It did not provide me with the data that requested and did not stop too , any body can help me in figuring out my problem
the code is below and the service tested in real device:
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.os.SystemClock;
import android.widget.Toast;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
public class GpsService extends Service implements LocationListener{
static LocationManager mlocManager;
}
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
public void onCreate() {
}
#Override
public void onDestroy() {
}
#Override
public void onStart(Intent intent, int startid) {
mlocManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER,0, 0,this);
}
#Override
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " +"Latitud = " + loc.getLatitude() +"Longitud = " + loc.getLongitude();
Toast.makeText( getApplicationContext(),Text,Toast.LENGTH_SHORT).show();
// Here to stop the service and make it finish its task
SystemClock.sleep(40000);
// stop the Gps system by this application
mlocManager.removeUpdates(this);
//Here to stop the service by itself
stopSelf();
}
#Override
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Disabled",Toast.LENGTH_SHORT ).show();
}
#Override
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(),"Gps Enabled",Toast.LENGTH_SHORT).show();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
do you have the correct permissions on the manifest?
why do you make the service sleep and for so long? the service works on the UI thread , and such a thing can cause the service to be killed automatically by the system after about 5 seconds because the ui thread doesn't respond.
if you wish to delay the stopping and/or showing of the toast , either use Handler (and postDelayed) , or use asyncTask , or something of your own .
do you have the gps turned on? have you considered using a fake location app or the emulator for this task ?
good luck .