I have been trying to print my lang and long coordinates for the past two days, I have chopped and changed code in order to make it work, in a bit of a muddle now and don't understand why it won't work, I am new to Android Development whilst consulting a book (Beginning Android Development) but it doesn't touch on this subject, any help would be greatly appreciated.
It compiles and I don't get any errors, however it does not print out to the EditText boxes in the application, defined in main.xml.
Here is my code for the Java file:
package com.emergency;
import android.app.Activity;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.content.Context;
import android.location.LocationManager;
import android.location.Criteria;
public class EmergencyLocation extends Activity implements LocationListener {
private TextView latitudeField;
private TextView longitudeField;
private LocationManager locationManager;
private String provider;
/** Called when the activity is first created. **/
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
latitudeField = (TextView) findViewById(R.id.long_lat1);
longitudeField = (TextView) findViewById(R.id.long_lat2);
// Get the location manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the location provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
locationManager.requestLocationUpdates(provider, 0, 0, this);
Location location = locationManager.getLastKnownLocation(provider);
onLocationChanged(location);
}
#Override
protected void onDestroy() {
super.onDestroy();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location) {
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
latitudeField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
/*Toast.makeText(EmergencyLocation.this,
"Longitude " + longitudeField + "Latitude " + latitudeField, Toast.LENGTH_LONG).show();*/
//getting longitude to display in an EditText box
/*EditText lngtude = (EditText) findViewById(R.id.longitudeField);
lngtude.setText(String.valueOf(lng));
EditText lattude = (EditText) findViewById(R.id.latitudeField);
lattude.setText(String.valueOf(lat)); */
EditText lngtude = (EditText) findViewById(R.id.longitudeField);
lngtude.setText(String.valueOf(lng), TextView.BufferType.EDITABLE);
EditText lattude = (EditText) findViewById(R.id.latitudeField);
lattude.setText(String.valueOf(lat), TextView.BufferType.EDITABLE);
} else {
latitudeField.setText("Provider not available");
longitudeField.setText("Provider not available");
}
}
#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
}
/* #Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button simpleBtn = (Button) findViewById(R.id.location);
simpleBtn.setOnClickListener(new View.OnClickListener() {*/
}
;
I don't believe you're using EditText.setText correctly. See this post as well.
EditText lngtude = (EditText) findViewById(R.id.longitudeField);
lngtude.setText(String.valueOf(lng), TextView.BufferType.EDITABLE);
EditText lattude = (EditText) findViewById(R.id.latitudeField);
lattude.setText(String.valueOf(lat), TextView.BufferType.EDITABLE);
You shouldn't call onLocationChanged() from code. That method runs when the location actually changes. On the emulator you have to simulate a location change, either by sending coordinates from the DDMS perspective or by using the geo fix command in a telnet session.
Related
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'm working on an Android app which gets your current location upon clicking a button, and then prints it if you click another button.
Now, I've got all of the code done, yet I'm stuck into how to retrieve the info of the longitude and latitude to print it, because I earn it on another function.
I'll post my code below to explain what I mean in a clearer manner:
package com.example.geolocation;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener, LocationListener {
private LocationManager locationManager;
public String provider;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button start = (Button)findViewById(R.id.start);
start.setOnClickListener(this);
Button stop = (Button)findViewById(R.id.stop);
stop.setOnClickListener(this);
Button show = (Button)findViewById(R.id.show);
show.setOnClickListener(this);
TextView location = (TextView)findViewById(R.id.location);
TextView providers = (TextView)findViewById(R.id.providers);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
//funcions boto start
case R.id.start:
locationManager.requestLocationUpdates(
provider,
10000, //temps em ms (10s)
500, //distancia (meters)
this);
//mostrar provider
TextView location = (TextView)findViewById(R.id.location);
location.setText("Provider: " + provider);
break;
//funcio boto stop
case R.id.stop:
locationManager.removeUpdates(this);
break;
//funcio boto show
case R.id.show:
Location locations = locationManager.getLastKnownLocation(provider);
locationManager.requestLocationUpdates(
provider,
10000, //temps em ms (10s)
1000, //distancia (meters)
this);
//show long & lat
TextView providers = (TextView)findViewById(R.id.providers);
providers.setText("Latitude & longitude: " + ""); //com traslladar valor loc aqui?
break;
}
}
#Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
int lat = (int) (loc.getLatitude());
int lng = (int) (loc.getLongitude());
loc.toString();
}
#Override
public void onProviderDisabled(String np) {
// TODO Auto-generated method stub
}
#Override
public void onProviderEnabled(String p) {
// TODO Auto-generated method stub
}
#Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
The segment where I get the desired info is this one:
#Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
int lat = (int) (loc.getLatitude());
int lng = (int) (loc.getLongitude());
loc.toString();
}
As you can see, I turn the information into a String.
Now, my problem is: how do I call this info in the main function to print it? In this segment:
//funcio boto show
case R.id.show:
Location locations = locationManager.getLastKnownLocation(provider);
locationManager.requestLocationUpdates(
provider,
10000, //temps em ms (10s)
1000, //distancia (meters)
this);
//show long & lat
TextView providers = (TextView)findViewById(R.id.providers);
providers.setText("Latitude & longitude: " + ""); //com traslladar valor loc aqui?
break;
what you have to do is the following :
1st - declare a String to store your lattitude and longitude :
private String lattitude , longitude;
2nd - in your get onLocationChanged do the following :
#Override
public void onLocationChanged(Location loc) {
// TODO Auto-generated method stub
int lat = (int) (loc.getLatitude());
int lng = (int) (loc.getLongitude());
lattitude = "lattitude = "+ lat ;
longitude = "longitude = "+ lng;
}
3rd - use the lattitude and longitude to print them in any place you want .
Hope that helps .
I am trying to get a location (latitude, longitude) on my Android smartphone (HTC Desire HD), using Wifi-network and GPS.
This is the code I use, only I keep getting "Location not available"
Iam working with Eclipse IDE.
import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import com.example.shortsproject.R;
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 LocationGetter extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager locationManager;
private String provider;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location);
latituteField = (TextView) findViewById(R.id.locationtext);
longitudeField = (TextView) findViewById(R.id.locationtext2);
// Get the location manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the location 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) {
// TODO Auto-generated method stub
}
#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();
}
}
Can someone help me with this?
i am trying google maps api on my android phone via following code. My app locating my phone and working great but gps notification icon not blinking. How can i blink gps icon when locating my phone.
Thanks For Replies.
Manifest:
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
And The Code :
import java.util.List;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.EditText;
import android.widget.Toast;
public class main extends MapActivity {
MapController mControl;
GeoPoint geoP;
MapView mapV;
MyLocationOverlay compass;
EditText etext;
String provider;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
etext = (EditText) findViewById(R.id.latLong);
mapV = (MapView) findViewById(R.id.mapView);
mapV.displayZoomControls(true);
mapV.setBuiltInZoomControls(true);
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
boolean enable = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!enable) {
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}
Criteria criteria = new Criteria();
//criteria.setAccuracy(Criteria.ACCURACY_FINE);
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
Double lat = location.getLatitude() * 1E6;
Double longi = location.getLongitude() * 1E6;
geoP = new GeoPoint(lat.intValue(), longi.intValue());
List<Overlay> mapOverlays = mapV.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.androidmarker);
compass = new MyLocationOverlay(this, mapV);
HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable, this);
OverlayItem overlayitem = new OverlayItem(geoP, "Hola, Mundo!","I'm in Mexico City!");
itemizedoverlay.addOverlay(overlayitem);
mapV.getOverlays().add(compass);
mapOverlays.add(itemizedoverlay);
mControl = mapV.getController();
mControl.animateTo(geoP);
mControl.setZoom(5);
mControl.setCenter(geoP);
locationManager.requestLocationUpdates(provider, 0, 0,
new LocationListener() {
public void onStatusChanged(String provider, int status,
Bundle extras) {
if (status == LocationProvider.AVAILABLE) {
Toast.makeText(getApplicationContext(),
"LocationProvider.AVAILABLE",
Toast.LENGTH_SHORT).show();
} else if (status == LocationProvider.TEMPORARILY_UNAVAILABLE) {
Toast.makeText(getApplicationContext(),
"LocationProvider.TEMPORARILY_UNAVAILABLE",
Toast.LENGTH_SHORT).show();
} else if (status == LocationProvider.OUT_OF_SERVICE) {
Toast.makeText(getApplicationContext(),
"LocationProvider.OUT_OF_SERVICE",
Toast.LENGTH_SHORT).show();
}
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
public void onLocationChanged(Location location) {
Toast.makeText(getApplicationContext(),
"Location Changed", Toast.LENGTH_SHORT).show();
}
});
//etext.setText(String.valueOf(lat) + "," + String.valueOf(longi));
}
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
compass.disableCompass();
}
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
compass.enableCompass();
}
protected boolean isRouteDisplayed() {
return false;
}
t0mm13b, working on my handset but GPS notification icon not blinking. Virtual Device means Emulator. I solved problem.
Code :
package com.yunusoksuz.gmapstest;
import android.app.Activity;
import android.location.Criteria;
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 YnsmapsActivity extends Activity implements LocationListener {
/** Called when the activity is first created. */
private LocationManager locationManager;
private Location location;
private String provider;
private Double lat, longi;
private Criteria criteria;
TextView tv;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.tv1);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAccuracy(Criteria.ACCURACY_COARSE);
provider = locationManager.getBestProvider(criteria, false);
location = locationManager.getLastKnownLocation(provider);
locationManager.requestLocationUpdates(provider, 0, 0, this);
}
public void onLocationChanged(Location location) {
Toast.makeText(
this,
"Lat : " + location.getLatitude() + " LONG : "
+ location.getLongitude(), Toast.LENGTH_SHORT).show();
tv.setText("Lat : " + location.getLatitude() + " LONG : "
+ location.getLongitude());
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
locationManager.removeUpdates(this);
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, this);
}
}
Now gps notification blinking.
UPDATED AT BOTTOM
I have written an application that logs the users position, current speed, average speed and top speed. I would like to know how to make the application do the following things:
prevent the screen from turning off while it is open on the screen
if the user opens another app or returns to the home screen, gets a call etc, the app should keep collecting data
(or would it be better to just write all data to a database everytime the location is updated? and maybe have a button to signify when to start and stop collecting data?)
here is the code that I have written. (feel free to use it if you want and if you have any recommendations on how I might improve it I am very open to constructive criticism :D )
package Hartford.gps;
import java.math.BigDecimal;
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.widget.TextView;
public class GPSMain extends Activity implements LocationListener {
LocationManager locationManager;
LocationListener locationListener;
//text views to display latitude and longitude
TextView latituteField;
TextView longitudeField;
TextView currentSpeedField;
TextView kmphSpeedField;
TextView avgSpeedField;
TextView avgKmphField;
//objects to store positional information
protected double lat;
protected double lon;
//objects to store values for current and average speed
protected double currentSpeed;
protected double kmphSpeed;
protected double avgSpeed;
protected double avgKmph;
protected double totalSpeed;
protected double totalKmph;
//counter that is incremented every time a new position is received, used to calculate average speed
int counter = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
run();
}
#Override
public void onResume() {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 1, this);
super.onResume();
}
#Override
public void onPause() {
locationManager.removeUpdates(this);
super.onPause();
}
private void run(){
final Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setSpeedRequired(true);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//Acquire a reference to the system Location Manager
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
locationListener = new LocationListener() {
public void onLocationChanged(Location newLocation) {
counter++;
//current speed fo the gps device
currentSpeed = round(newLocation.getSpeed(),3,BigDecimal.ROUND_HALF_UP);
kmphSpeed = round((currentSpeed*3.6),3,BigDecimal.ROUND_HALF_UP);
//all speeds added together
totalSpeed = totalSpeed + currentSpeed;
totalKmph = totalKmph + kmphSpeed;
//calculates average speed
avgSpeed = round(totalSpeed/counter,3,BigDecimal.ROUND_HALF_UP);
avgKmph = round(totalKmph/counter,3,BigDecimal.ROUND_HALF_UP);
//gets position
lat = round(((double) (newLocation.getLatitude())),3,BigDecimal.ROUND_HALF_UP);
lon = round(((double) (newLocation.getLongitude())),3,BigDecimal.ROUND_HALF_UP);
latituteField = (TextView) findViewById(R.id.lat);
longitudeField = (TextView) findViewById(R.id.lon);
currentSpeedField = (TextView) findViewById(R.id.speed);
kmphSpeedField = (TextView) findViewById(R.id.kmph);
avgSpeedField = (TextView) findViewById(R.id.avgspeed);
avgKmphField = (TextView) findViewById(R.id.avgkmph);
latituteField.setText("Current Latitude: "+String.valueOf(lat));
longitudeField.setText("Current Longitude: "+String.valueOf(lon));
currentSpeedField.setText("Current Speed (m/s): "+String.valueOf(currentSpeed));
kmphSpeedField.setText("Cuttent Speed (kmph): "+String.valueOf(kmphSpeed));
avgSpeedField.setText("Average Speed (m/s): "+String.valueOf(avgSpeed));
avgKmphField.setText("Average Speed (kmph): "+String.valueOf(avgKmph));
}
//not entirely sure what these do yet
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.GPS_PROVIDER, 0, 1, locationListener);
}
//Method to round the doubles to a max of 3 decimal places
public static double round(double unrounded, int precision, int roundingMode)
{
BigDecimal bd = new BigDecimal(unrounded);
BigDecimal rounded = bd.setScale(precision, roundingMode);
return rounded.doubleValue();
}
#Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
#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
}
}
BOTH PROBLEMS SOLVED THANKS TO ANSWERS FROM Marco Grassi AND Marcovena.
New Code:
package Hartford.gps;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.PowerManager;
import android.widget.TextView;
public class GPSMain extends Activity {
//text views to display latitude and longitude
static TextView latituteField;
static TextView longitudeField;
static TextView currentSpeedField;
static TextView kmphSpeedField;
static TextView avgSpeedField;
static TextView avgKmphField;
static TextView topSpeedField;
static TextView topKmphField;
//objects to store positional information
protected static double lat;
protected static double lon;
//objects to store values for current and average speed
protected static double currentSpeed;
protected static double kmphSpeed;
protected static double avgSpeed;
protected static double avgKmph;
protected static double totalSpeed;
protected static double totalKmph;
protected static double topSpeed=0;
protected static double topKmph=0;
//counter that is incremented every time a new position is received, used to calculate average speed
static int counter = 0;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
PowerManager powerManager = (PowerManager)getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wL = powerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK,"My Tag");
wL.acquire();
startService(new Intent(this, Calculations.class));
latituteField = (TextView) findViewById(R.id.lat);
longitudeField = (TextView) findViewById(R.id.lon);
currentSpeedField = (TextView) findViewById(R.id.speed);
kmphSpeedField = (TextView) findViewById(R.id.kmph);
avgSpeedField = (TextView) findViewById(R.id.avgspeed);
avgKmphField = (TextView) findViewById(R.id.avgkmph);
topSpeedField = (TextView) findViewById(R.id.topspeed);
topKmphField = (TextView) findViewById(R.id.topkmph);
}
static void run(){
latituteField.setText("Current Latitude: "+String.valueOf(lat));
longitudeField.setText("Current Longitude: "+String.valueOf(lon));
currentSpeedField.setText("Current Speed (m/s): "+String.valueOf(currentSpeed));
kmphSpeedField.setText("Cuttent Speed (kmph): "+String.valueOf(kmphSpeed));
avgSpeedField.setText("Average Speed (m/s): "+String.valueOf(avgSpeed));
avgKmphField.setText("Average Speed (kmph): "+String.valueOf(avgKmph));
topSpeedField.setText("Top Speed (m/s): "+String.valueOf(topSpeed));
topKmphField.setText("Top Speed (kmph): "+String.valueOf(topKmph));
}
}
and
package Hartford.gps;
import java.math.BigDecimal;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class Calculations extends Service implements LocationListener {
static LocationManager locationManager;
LocationListener locationListener;
private static final String TAG = "Calculations";
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
#Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
run();
}
private void run(){
final Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setSpeedRequired(true);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//Acquire a reference to the system Location Manager
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
locationListener = new LocationListener() {
public void onLocationChanged(Location newLocation) {
GPSMain.counter++;
//current speed for the GPS device
GPSMain.currentSpeed = round(newLocation.getSpeed(),3,BigDecimal.ROUND_HALF_UP);
GPSMain.kmphSpeed = round((GPSMain.currentSpeed*3.6),3,BigDecimal.ROUND_HALF_UP);
if (GPSMain.currentSpeed>GPSMain.topSpeed) {
GPSMain.topSpeed=GPSMain.currentSpeed;
}
if (GPSMain.kmphSpeed>GPSMain.topKmph) {
GPSMain.topKmph=GPSMain.kmphSpeed;
}
//all speeds added together
GPSMain.totalSpeed = GPSMain.totalSpeed + GPSMain.currentSpeed;
GPSMain.totalKmph = GPSMain.totalKmph + GPSMain.kmphSpeed;
//calculates average speed
GPSMain.avgSpeed = round(GPSMain.totalSpeed/GPSMain.counter,3,BigDecimal.ROUND_HALF_UP);
GPSMain.avgKmph = round(GPSMain.totalKmph/GPSMain.counter,3,BigDecimal.ROUND_HALF_UP);
//gets position
GPSMain.lat = round(((double) (newLocation.getLatitude())),3,BigDecimal.ROUND_HALF_UP);
GPSMain.lon = round(((double) (newLocation.getLongitude())),3,BigDecimal.ROUND_HALF_UP);
GPSMain.run();
}
//not entirely sure what these do yet
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.GPS_PROVIDER, 0, 1, locationListener);
}
//Method to round the doubles to a max of 3 decimal places
public static double round(double unrounded, int precision, int roundingMode)
{
BigDecimal bd = new BigDecimal(unrounded);
BigDecimal rounded = bd.setScale(precision, roundingMode);
return rounded.doubleValue();
}
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
UPDATE FOR shababhsiddique
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class Calculations extends Service{
static LocationManager locationManager;
static LocationListener locationListener;
private static long timerTime = 1;
private static float timerFloatValue = 1.0f;
private Context context;
private int counter = 0;
#Override
public IBinder onBind(Intent intent) {return null;}
#Override
public void onCreate() {
context = this;
update();
}
protected void update(){
final Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setSpeedRequired(true);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//Acquire a reference to the system Location Manager
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
locationListener = new LocationListener() {
public void onLocationChanged(Location newLocation) {
counter++;
if(GPSMain.GPSHasStarted==0){
GPSMain.previousLocation = newLocation;
//gets position
GPSMain.lat = round(((double) (GPSMain.previousLocation.getLatitude())),3,BigDecimal.ROUND_HALF_UP);
GPSMain.lon = round(((double) (GPSMain.previousLocation.getLongitude())),3,BigDecimal.ROUND_HALF_UP);
GPSMain.startingLocation = GPSMain.previousLocation;
GPSMain.routeLat.add(Double.toString(GPSMain.startingLocation.getLatitude()));
GPSMain.routeLon.add(Double.toString(GPSMain.startingLocation.getLongitude()));
GPSMain.startTime = System.currentTimeMillis();
GPSMain.GPSHasStarted++;
Toast.makeText(context, "GPS Connection Established", Toast.LENGTH_LONG).show();
startService(new Intent(context, AccelerometerReader.class));
Toast.makeText(context, "Accelerometer Calculating", Toast.LENGTH_LONG).show();
Toast.makeText(context, "Have A Safe Trip!", Toast.LENGTH_LONG).show();
}
//gets position
GPSMain.lat = round(((double) (newLocation.getLatitude())),3,BigDecimal.ROUND_HALF_UP);
GPSMain.lon = round(((double) (newLocation.getLongitude())),3,BigDecimal.ROUND_HALF_UP);
if (newLocation.distanceTo(GPSMain.previousLocation)>2.0f){
GPSMain.distanceBetweenPoints = GPSMain.distanceBetweenPoints + newLocation.distanceTo(GPSMain.previousLocation);
}
//current speed for the GPS device
GPSMain.mpsSpeed = newLocation.getSpeed();
if (GPSMain.mpsSpeed>GPSMain.topMps) {GPSMain.topMps=GPSMain.mpsSpeed;}
//store location in order to calculate distance during next iteration.
GPSMain.previousLocation = newLocation;
if (counter % 20 == 0){
GPSMain.routeLat.add(Double.toString(GPSMain.previousLocation.getLatitude()));
GPSMain.routeLon.add(Double.toString(GPSMain.previousLocation.getLongitude()));
}
}
//not entirely sure what these do yet
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.GPS_PROVIDER, 2000, 20, locationListener);
}
//Method to round the doubles to a max of 3 decimal places
public static double round(double unrounded, int precision, int roundingMode){
BigDecimal bd = new BigDecimal(unrounded);
BigDecimal rounded = bd.setScale(precision, roundingMode);
return rounded.doubleValue();
}
//formats the time taken in milliseconds into hours minutes and seconds
public static String getTimeTaken(long end, long start){
#SuppressWarnings("unused")
String formattedTime = "", hourHour = "", hourMin = ":", minSec = ":";
long timeTaken = end-start, hour = 0, min = 0, sec = 0;
timerTime = timeTaken;
timeTaken = (end-start)/1000;
if (timeTaken>9 ){
hourHour = "0";
hourMin = ":0";
if (timeTaken>=60){
if (timeTaken>= 3200){
hour = timeTaken/3200;
timeTaken = timeTaken%3200;
if (hour>9){
hourHour = "";
}
}
min = timeTaken/60;
timeTaken = timeTaken%60;
if (min >9){
hourMin = ":";
}
}
sec = timeTaken;
if(sec%60<10){
minSec = ":0";
}
return formattedTime = (hourHour+hour+hourMin+min+minSec+sec);
}
sec = timeTaken;
minSec = ":0";
hourMin = ":0";
hourHour = "0";
return formattedTime = (hourHour+hour+hourMin+min+minSec+sec);
}
public static double averageSpeed(){
//calculates average speed
if (timerTime==0){timerTime=1;}
timerFloatValue = (float) timerTime;
timerFloatValue = timerFloatValue/1000;
return GPSMain.avgMps = GPSMain.distanceBetweenPoints/timerFloatValue;
}
//rounds the float values from the accelerometer
static String roundTwoDecimalFloat(float a){
float b = a/9.8f;
String formattedNum;
NumberFormat nf = new DecimalFormat();
nf.setMaximumFractionDigits(2);
nf.setMinimumFractionDigits(2);
formattedNum = nf.format(b);
return formattedNum;
}
}
Question 1: You must acquire a WakeLock . There are multiple types of wakelock, depending if you want only the cpu on or also the screen.
Question 2: You should do your collecting data stuff inside a Service and separate the graphical interface from the collecting data. The Service will continue to collect the data until you stop it if you implement it correctly.