Because of min time betwwen update it display the location update after 1 sec again and again how can i sttop this once i get the location update
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1000; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 1*1000*60; // in Milliseconds
protected LocationManager locationManager;
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MINIMUM_TIME_BETWEEN_UPDATES,MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, locationListener);
private class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location location)
{
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude(),location.getTime()
);
Toast.makeText(MyService.this, message, Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String s, int i, Bundle b) {}
public void onProviderDisabled(String s) {}
public void onProviderEnabled(String s) {}
}
locationManager.removeUpdates(locationListener);
For removing updates you have to call
locationManager.removeUpdates(<yourLocationListener>);
Try this :
locationManager.removeUpdates(locationListener);
locationManager= null;
Related
I'm pretty new to Java & Android and I have some issues with a code.
Does the location1.distanceTo(location2) method calculates the distance considering elevation changes too?
Another issue is that although I'm not moving the device, the distance measured changes.
This is the code I have:
public class GpsCalculator{
public Activity activity;
private LocationManager locationManager = null;
private Location previousLocation = null;
private double totalDistance = 0D;
private Context context;
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1; // 1 meter
private static final long MIN_TIME_BW_UPDATES = 1000; // 1 second
TextView distance_tracker;
public GpsCalculator(TextView dt) {
distance_tracker = dt;
}
public void run(Context act){
context = act;
// Get the location manager
locationManager = (LocationManager) context.getSystemService(Service.LOCATION_SERVICE);
// Add new listeners with the given params
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, locationListener); // Network location
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, locationListener); // Gps location
}
public void stop(){
locationManager.removeUpdates(locationListener);
}
DecimalFormat df = new DecimalFormat("#");
private LocationListener locationListener = new LocationListener(){
#Override
public void onLocationChanged(Location newLocation){
if (previousLocation != null){
GpsCalculator.this.totalDistance += previousLocation.distanceTo(newLocation);
}
// Update stored location
GpsCalculator.this.previousLocation = newLocation;
CharSequence text = Double.toString(totalDistance);
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
distance_tracker.setText(df.format(totalDistance)+ " m");
}
#Override
public void onProviderDisabled(String provider) {}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
}; }
I'd like to mention that the accuracy issues persisted with or without the network provider listener.
Conclusion
The code is correct, but the accuracy of GPS data isn't. I understood this from the comments under Carsten's answer.
The location object normally also contains altitude information so elevation is taken into account.
Does the location change between updates? I would think so because it is updated every sec in your case.
How do I disable location updates in onLocationChanged() after clicking on stop button also it is continuously updating the location.
I have used the code mentioned here.
Please help me out how to solve this.
public class AndroidGPSSampleActivity extends Activity {
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000; // in Milliseconds
protected LocationManager locationManager;
protected Button retrieveLocationButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
new MyLocationListener()
);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new MyLocationListener());
retrieveLocationButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showCurrentLocation();
}
});
}
protected void showCurrentLocation() {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
String message = String.format(
"Current Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, "Sample test",
Toast.LENGTH_LONG).show();
Toast.makeText(AndroidGPSSampleActivity.this, message,
Toast.LENGTH_LONG).show();
}
}
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, message, Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String s, int i, Bundle b) {
Toast.makeText(AndroidGPSSampleActivity.this, "Provider status changed",Toast.LENGTH_LONG).show();
}
public void onProviderDisabled(String s) {
Toast.makeText(AndroidGPSSampleActivity.this,"Provider disabled by the user. GPS turned off",Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String s) {
System.out.println("==onProviderEnabled=" + s);
Toast.makeText(AndroidGPSSampleActivity.this, "Provider enabled by the user. GPS turned on",Toast.LENGTH_LONG).show();
}
}
I'll suggest you to make MyLocationListener as class field and later you can access it from any inner class. You can disable updates for a specific listener by calling removeUpdates method of LocationManager class.
public class AndroidGPSSampleActivity extends Activity {
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1;
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000;
private MyLocationListener listener = new MyLocationListener();
...
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, listener);
Updates can be stopped in any place of code by using the following:
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.removeUpdates(listener);
}
});
It is very simple.
But I see nothing appears on the logcat.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map_selection);
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
if (location != null) {
double longitude = location.getLongitude();
double latitude = location.getLatitude();
Log.d("MapSelectionActivity", longitude + " " + latitude);
} else {
Log.d("MapSelectionActivity", "location unavailable");
}
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
}
I am sure my phone is connected to a wifi access point, which enables the phone to access the internet.
First change the line below:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
To:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 5000, 0, locationListener);
Like it's said here:
public void requestLocationUpdates (String provider, long minTime, float minDistance, LocationListener listener, Looper looper)
...
minTime minimum time interval between location updates, in milliseconds
...
EDIT
I found this tutorial here, which has a simpler usage:
LocationListener locationListener = new MyLocationListener();
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 5000, 10, this.locationListener);
private final class MyLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location locFromGps) {
// called when the listener is notified with a location update from the GPS
}
#Override
public void onProviderDisabled(String provider) {
// called when the GPS provider is turned off (user turning off the GPS on the phone)
}
#Override
public void onProviderEnabled(String provider) {
// called when the GPS provider is turned on (user turning on the GPS on the phone)
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// called when the status of the GPS provider changes
}
}
I am developing a small android application in which I want to find out the user's current location by using the network provider. I tried this in following ways but it's not giving me any output :
networklocationManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener networklocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
Log.i("********************************",
"this is my network location " + location);
String Location_text = "NETWORK LOCATION latitude:"
+ location.getLatitude() + " longitude:"
+ location.getLatitude();
network_location.setText(Location_text);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location
// updates
networklocationManager
.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
networklocationListener);
I gave permissions in my manifest file like this
<uses-permission
android:name="android.permission.INTERNET" />
<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission
android:name="android.permission.ACCESS_FINE_LOCATION" />
Is there any thing which I am missing ? Is this the correct way? Need help. Thank you...
public class MainActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager gpslocationManager;
private LocationManager networklocationManager;
private LocationManager networklocationManager1;
private String provider;
private TextView gps_location;
private TextView network_location;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gps_location = (TextView) findViewById(R.id.gps_location);
network_location = (TextView) findViewById(R.id.network_location);
networkLocation();
}
public void networkLocation() {
networklocationManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
LocationListener networklocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
Log.i("********************************",
"this is my network location " + location);
String Location_text = "NETWORK LOCATION latitude:"
+ location.getLatitude() + " longitude:"
+ location.getLatitude();
network_location.setText(Location_text);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
networklocationManager
.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
networklocationListener);
}
}
Make sure you enable Location Services in Settings! That should be the problem. It might be disabled (and this setting will usually be found in Location and Security in Settings)
Let me know if it works!
Is your network provider enabled?
boolean network_enabled;
try {
network_enabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch(Exception ex) {
ex.printStackTrace();
}
I hope this part of the code will help you extracted from vogella.
public class ShowLocationActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager locationManager;
private String provider;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
// Get the location manager
locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
} else {
latituteField.setText("Location not available");
longitudeField.setText("Location not available");
}
}
/* Request updates at startup */
#Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
/* Remove the locationlistener updates when Activity is paused */
#Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
}
I want to get the GPS location value.I have wrote code.But i didn't show message. I have tested in deveice not emulator.Device contain GPS & its enable. & there is no internet connection also.
Please tell me what is wrong in my code
public class AndroidGPSSampleActivity extends Activity {
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000; // in Milliseconds
protected LocationManager locationManager;
protected Button retrieveLocationButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
new MyLocationListener()
);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new MyLocationListener());
retrieveLocationButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showCurrentLocation();
}
});
}
protected void showCurrentLocation() {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
String message = String.format(
"Current Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, "Sample test",
Toast.LENGTH_LONG).show();
Toast.makeText(AndroidGPSSampleActivity.this, message,
Toast.LENGTH_LONG).show();
}
}
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, message, Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String s, int i, Bundle b) {
Toast.makeText(AndroidGPSSampleActivity.this, "Provider status changed",Toast.LENGTH_LONG).show();
}
public void onProviderDisabled(String s) {
Toast.makeText(AndroidGPSSampleActivity.this,"Provider disabled by the user. GPS turned off",Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String s) {
System.out.println("==onProviderEnabled=" + s);
Toast.makeText(AndroidGPSSampleActivity.this, "Provider enabled by the user. GPS turned on",Toast.LENGTH_LONG).show();
}
}
and permission
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
always Location give null value. It didn't go to onLocationChanged method...
Please help me out from this issue...
I adapt where am i tutorial.. hope it would help
p.s. I write it without testing .. technically,it would work.. i guess
private Location loca;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LocationManager locman;
String context = Context.LOCATION_SERVICE;
locman = (LocationManager)getSystemService(context);
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 = locman.getBestProvider(criteria, true);
loca = locman.getLastKnownLocation(provider);
updateWithNewLocation(loca);
locman.requestLocationUpdates(provider, 1000, 1, locationListener);
retrieveLocationButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String message = "My location : " + updateWithNewLocation(loca);
Toast.makeText(AndroidGPSSampleActivity.this, message,
Toast.LENGTH_LONG).show();
}
});
}
private final LocationListener locationListener = new LocationListener() {
#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) {
updateWithNewLocation(null);
}
#Override
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
};
private string updateWithNewLocation(Location location){
if(location!=null){
double lat = location.getLatitude();
double lng = location.getLongitude();
latLongString = "Lat:" + lat + "\nLong:" + lng;
}else{
latLongString = "No location found";
}
return latLongString;
}
I changed some of your code please check this
public class AndroidGPSSampleActivity extends Activity implements LocationListener{
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000; // in Milliseconds
protected LocationManager locationManager;
protected Button retrieveLocationButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
locationManager.requestLocationUpdates(locationManager.NETWORK_PROVIDER, 500L, 250.0f, this);
retrieveLocationButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showCurrentLocation();
}
});
}
#Override
public void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onDestroy(){
locationManager.removeUpdates(this);
super.onDestroy();
}
protected void showCurrentLocation() {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(location == null){
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
if (location != null) {
String message = String.format(
"Current Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, "Sample test",
Toast.LENGTH_LONG).show();
Toast.makeText(AndroidGPSSampleActivity.this, message,
Toast.LENGTH_LONG).show();
}
}
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
if (location != null){
String message = String.format("New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude());
Toast.makeText(AndroidGPSSampleActivity.this, message, Toast.LENGTH_LONG).show();
}
}
public void onStatusChanged(String s, int i, Bundle b) {
Toast.makeText(AndroidGPSSampleActivity.this, "Provider status changed",Toast.LENGTH_LONG).show();
}
public void onProviderDisabled(String s) {
Toast.makeText(AndroidGPSSampleActivity.this,"Provider disabled by the user. GPS turned off",Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String s) {
System.out.println("==onProviderEnabled=" + s);
Toast.makeText(AndroidGPSSampleActivity.this, "Provider enabled by the user. GPS turned on",Toast.LENGTH_LONG).show();
}
}