如何在android中获取当前位置的经纬度
在我的应用程序中，当应用程序打开时，获取当前位置的经度和纬度，但是当应用程序closures时，则不会。
我正在使用Service类获取我的应用程序中当前位置的经纬度。
请告诉我如何获得当前位置的经度和纬度，即使应用程序closures
几个月前，我创build了GPSTracker库来帮助我获取GPS位置。 万一你需要查看GPSTracker> getLocation
演示
AndroidManifest.xml中
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 活动
import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.widget.TextView; public class MainActivity extends Activity { TextView textview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.geo_locations); // check if GPS enabled GPSTracker gpsTracker = new GPSTracker(this); if (gpsTracker.getIsGPSTrackingEnabled()) { String stringLatitude = String.valueOf(gpsTracker.latitude); textview = (TextView)findViewById(R.id.fieldLatitude); textview.setText(stringLatitude); String stringLongitude = String.valueOf(gpsTracker.longitude); textview = (TextView)findViewById(R.id.fieldLongitude); textview.setText(stringLongitude); String country = gpsTracker.getCountryName(this); textview = (TextView)findViewById(R.id.fieldCountry); textview.setText(country); String city = gpsTracker.getLocality(this); textview = (TextView)findViewById(R.id.fieldCity); textview.setText(city); String postalCode = gpsTracker.getPostalCode(this); textview = (TextView)findViewById(R.id.fieldPostalCode); textview.setText(postalCode); String addressLine = gpsTracker.getAddressLine(this); textview = (TextView)findViewById(R.id.fieldAddressLine); textview.setText(addressLine); } else { // can't get location // GPS or Network is not enabled // Ask user to enable GPS/network in settings gpsTracker.showSettingsAlert(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.varna_lab_geo_locations, menu); return true; } }
GPS追踪器
import java.io.IOException; import java.util.List; import java.util.Locale; import android.app.AlertDialog; import android.app.Service; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.os.IBinder; import android.provider.Settings; import android.util.Log; /** * Create this Class from tutorial : * http://www.androidhive.info/2012/07/android-gps-location-manager-tutorial * * For Geocoder read this : http://stackoverflow.com/questions/472313/android-reverse-geocoding-getfromlocation * */ public class GPSTracker extends Service implements LocationListener { // Get Class Name private static String TAG = GPSTracker.class.getName(); private final Context mContext; // flag for GPS Status boolean isGPSEnabled = false; // flag for network status boolean isNetworkEnabled = false; // flag for GPS Tracking is enabled boolean isGPSTrackingEnabled = false; Location location; double latitude; double longitude; // How many Geocoder should return our GPSTracker int geocoderMaxResults = 1; // The minimum distance to change updates in meters private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters // The minimum time between updates in milliseconds private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute // Declaring a Location Manager protected LocationManager locationManager; // Store LocationManager.GPS_PROVIDER or LocationManager.NETWORK_PROVIDER information private String provider_info; public GPSTracker(Context context) { this.mContext = context; getLocation(); } /** * Try to get my current location by GPS or Network Provider */ public void getLocation() { try { locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE); //getting GPS status isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); //getting network status isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); // Try to get location if you GPS Service is enabled if (isGPSEnabled) { this.isGPSTrackingEnabled = true; Log.d(TAG, "Application use GPS Service"); /* * This provider determines location using * satellites. Depending on conditions, this provider may take a while to return * a location fix. */ provider_info = LocationManager.GPS_PROVIDER; } else if (isNetworkEnabled) { // Try to get location if you Network Service is enabled this.isGPSTrackingEnabled = true; Log.d(TAG, "Application use Network State to get GPS coordinates"); /* * This provider determines location based on * availability of cell tower and WiFi access points. Results are retrieved * by means of a network lookup. */ provider_info = LocationManager.NETWORK_PROVIDER; } // Application can use GPS or Network Provider if (!provider_info.isEmpty()) { locationManager.requestLocationUpdates( provider_info, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this ); if (locationManager != null) { location = locationManager.getLastKnownLocation(provider_info); updateGPSCoordinates(); } } } catch (Exception e) { //e.printStackTrace(); Log.e(TAG, "Impossible to connect to LocationManager", e); } } /** * Update GPSTracker latitude and longitude */ public void updateGPSCoordinates() { if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } /** * GPSTracker latitude getter and setter * @return latitude */ public double getLatitude() { if (location != null) { latitude = location.getLatitude(); } return latitude; } /** * GPSTracker longitude getter and setter * @return */ public double getLongitude() { if (location != null) { longitude = location.getLongitude(); } return longitude; } /** * GPSTracker isGPSTrackingEnabled getter. * Check GPS/wifi is enabled */ public boolean getIsGPSTrackingEnabled() { return this.isGPSTrackingEnabled; } /** * Stop using GPS listener * Calling this method will stop using GPS in your app */ public void stopUsingGPS() { if (locationManager != null) { locationManager.removeUpdates(GPSTracker.this); } } /** * Function to show settings alert dialog */ public void showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); //Setting Dialog Title alertDialog.setTitle(R.string.GPSAlertDialogTitle); //Setting Dialog Message alertDialog.setMessage(R.string.GPSAlertDialogMessage); //On Pressing Setting button alertDialog.setPositiveButton(R.string.action_settings, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); mContext.startActivity(intent); } }); //On pressing cancel button alertDialog.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); alertDialog.show(); } /** * Get list of address by latitude and longitude * @return null or List<Address> */ public List<Address> getGeocoderAddress(Context context) { if (location != null) { Geocoder geocoder = new Geocoder(context, Locale.ENGLISH); try { /** * Geocoder.getFromLocation - Returns an array of Addresses * that are known to describe the area immediately surrounding the given latitude and longitude. */ List<Address> addresses = geocoder.getFromLocation(latitude, longitude, this.geocoderMaxResults); return addresses; } catch (IOException e) { //e.printStackTrace(); Log.e(TAG, "Impossible to connect to Geocoder", e); } } return null; } /** * Try to get AddressLine * @return null or addressLine */ public String getAddressLine(Context context) { List<Address> addresses = getGeocoderAddress(context); if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String addressLine = address.getAddressLine(0); return addressLine; } else { return null; } } /** * Try to get Locality * @return null or locality */ public String getLocality(Context context) { List<Address> addresses = getGeocoderAddress(context); if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String locality = address.getLocality(); return locality; } else { return null; } } /** * Try to get Postal Code * @return null or postalCode */ public String getPostalCode(Context context) { List<Address> addresses = getGeocoderAddress(context); if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String postalCode = address.getPostalCode(); return postalCode; } else { return null; } } /** * Try to get CountryName * @return null or postalCode */ public String getCountryName(Context context) { List<Address> addresses = getGeocoderAddress(context); if (addresses != null && addresses.size() > 0) { Address address = addresses.get(0); String countryName = address.getCountryName(); return countryName; } else { return null; } } @Override public void onLocationChanged(Location location) { } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } @Override public IBinder onBind(Intent intent) { return null; } }
注意
如果方法/答案不起作用。 您需要使用官方的Google提供程序： FusedLocationProviderApi 。
文章： 获取最后一个已知的位置
以上都没有为我工作，所以我做了一个教程，写了自己，因为我失去了很多小时试图实现这一点。 希望这可以帮助某人：
如何使用Google Play Services LOCATION API获取当前的经纬度
1）添加到您的AndroidManifest.xml文件的ACCESS_COARSE_LOCATION ＆ ACCESS_FINE_LOCATION ：
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.appname" > <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <application...
2）转到app/build.gradle文件并添加以下依赖项（ 确保使用最新的可用版本 ）：
dependencies { //..... compile 'com.google.android.gms:play-services-location:11.0.1 }
3）在您的活动中实施以下内容：
import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks; import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener; import com.google.android.gms.location.LocationListener; import com.google.android.gms.location.LocationRequest; import com.google.android.gms.location.LocationServices; import com.google.android.gms.maps.GoogleMap; public class HomeActivity extends AppCompatActivity implements ConnectionCallbacks, OnConnectionFailedListener, LocationListener { //Define a request code to send to Google Play services private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000; private GoogleApiClient mGoogleApiClient; private LocationRequest mLocationRequest; private double currentLatitude; private double currentLongitude; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); mGoogleApiClient = new GoogleApiClient.Builder(this) // The next two lines tell the new client that “this” current class will handle connection stuff .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) //fourth line adds the LocationServices API endpoint from GooglePlayServices .addApi(LocationServices.API) .build(); // Create the LocationRequest object mLocationRequest = LocationRequest.create() .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) .setInterval(10 * 1000) // 10 seconds, in milliseconds .setFastestInterval(1 * 1000); // 1 second, in milliseconds } @Override protected void onResume() { super.onResume(); //Now lets connect to the API mGoogleApiClient.connect(); } @Override protected void onPause() { super.onPause(); Log.v(this.getClass().getSimpleName(), "onPause()"); //Disconnect from API onPause() if (mGoogleApiClient.isConnected()) { LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); mGoogleApiClient.disconnect(); } } /** * If connected get lat and long * */ @Override public void onConnected(Bundle bundle) { Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); if (location == null) { LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); } else { //If everything went fine lets get latitude and longitude currentLatitude = location.getLatitude(); currentLongitude = location.getLongitude(); Toast.makeText(this, currentLatitude + " WORKS " + currentLongitude + "", Toast.LENGTH_LONG).show(); } } @Override public void onConnectionSuspended(int i) {} @Override public void onConnectionFailed(ConnectionResult connectionResult) { /* * Google Play services can resolve some errors it detects. * If the error has a resolution, try sending an Intent to * start a Google Play services activity that can resolve * error. */ if (connectionResult.hasResolution()) { try { // Start an Activity that tries to resolve the error connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST); /* * Thrown if Google Play services canceled the original * PendingIntent */ } catch (IntentSender.SendIntentException e) { // Log the error e.printStackTrace(); } } else { /* * If no resolution is available, display a dialog to the * user with the error. */ Log.e("Error", "Location services connection failed with code " + connectionResult.getErrorCode()); } } /** * If locationChanges change lat and long * * * @param location */ @Override public void onLocationChanged(Location location) { currentLatitude = location.getLatitude(); currentLongitude = location.getLongitude(); Toast.makeText(this, currentLatitude + " WORKS " + currentLongitude + "", Toast.LENGTH_LONG).show(); } }
如果您需要更多信息，请转到：
Android中的位置新手指南
注意：这在仿真器中似乎不起作用，但在设备上工作得很好
使用位置侦听器方法
@Override public void onLocationChanged(Location loc) { Double lat = loc.getLatitude(); Double lng = loc.getLongitude(); }
您可以使用以下类作为服务类来在后台运行您的应用程序
import java.util.Timer; import java.util.TimerTask; import android.app.Service; import android.content.Context; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.widget.Toast; public class MyService extends Service { private GPSTracker gpsTracker; private Handler handler= new Handler(); private Timer timer = new Timer(); private Distance pastDistance = new Distance(); private Distance currentDistance = new Distance(); public static double DISTANCE; boolean flag = true ; private double totalDistance ; @Override @Deprecated public void onStart(Intent intent, int startId) { super.onStart(intent, startId); gpsTracker = new GPSTracker(HomeFragment.HOMECONTEXT); TimerTask timerTask = new TimerTask() { @Override public void run() { handler.post(new Runnable() { @Override public void run() { if(flag){ pastDistance.setLatitude(gpsTracker.getLocation().getLatitude()); pastDistance.setLongitude(gpsTracker.getLocation().getLongitude()); flag = false; }else{ currentDistance.setLatitude(gpsTracker.getLocation().getLatitude()); currentDistance.setLongitude(gpsTracker.getLocation().getLongitude()); flag = comapre_LatitudeLongitude(); } Toast.makeText(HomeFragment.HOMECONTEXT, "latitude:"+gpsTracker.getLocation().getLatitude(), 4000).show(); } }); } }; timer.schedule(timerTask,0, 5000); } private double distance(double lat1, double lon1, double lat2, double lon2) { double theta = lon1 - lon2; double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta)); dist = Math.acos(dist); dist = rad2deg(dist); dist = dist * 60 * 1.1515; return (dist); } private double deg2rad(double deg) { return (deg * Math.PI / 180.0); } private double rad2deg(double rad) { return (rad * 180.0 / Math.PI); } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onDestroy() { super.onDestroy(); System.out.println("--------------------------------onDestroy -stop service "); timer.cancel(); DISTANCE = totalDistance ; } public boolean comapre_LatitudeLongitude(){ if(pastDistance.getLatitude() == currentDistance.getLatitude() && pastDistance.getLongitude() == currentDistance.getLongitude()){ return false; }else{ final double distance = distance(pastDistance.getLatitude(),pastDistance.getLongitude(),currentDistance.getLatitude(),currentDistance.getLongitude()); System.out.println("Distance in mile :"+distance); handler.post(new Runnable() { @Override public void run() { float kilometer=1.609344f; totalDistance = totalDistance + distance * kilometer; DISTANCE = totalDistance; //Toast.makeText(HomeFragment.HOMECONTEXT, "distance in km:"+DISTANCE, 4000).show(); } }); return true; } } }
添加另一个类来获取位置
import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.os.IBinder; import android.util.Log; public class GPSTracker implements LocationListener { private final Context mContext; boolean isGPSEnabled = false; boolean isNetworkEnabled = false; boolean canGetLocation = false; Location location = null; double latitude; double longitude; private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute protected LocationManager locationManager; private Location m_Location; public GPSTracker(Context context) { this.mContext = context; m_Location = getLocation(); System.out.println("location Latitude:"+m_Location.getLatitude()); System.out.println("location Longitude:"+m_Location.getLongitude()); System.out.println("getLocation():"+getLocation()); } public Location getLocation() { try { locationManager = (LocationManager) mContext .getSystemService(Context.LOCATION_SERVICE); isGPSEnabled = locationManager .isProviderEnabled(LocationManager.GPS_PROVIDER); isNetworkEnabled = locationManager .isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { // no network provider is enabled } else { this.canGetLocation = true; if (isNetworkEnabled) { locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); Log.d("Network", "Network Enabled"); if (locationManager != null) { location = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } if (isGPSEnabled) { if (location == null) { locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); Log.d("GPS", "GPS Enabled"); if (locationManager != null) { location = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } } } } catch (Exception e) { e.printStackTrace(); } return location; } public void stopUsingGPS() { if (locationManager != null) { locationManager.removeUpdates(GPSTracker.this); } } public double getLatitude() { if (location != null) { latitude = location.getLatitude(); } return latitude; } public double getLongitude() { if (location != null) { longitude = location.getLongitude(); } return longitude; } public boolean canGetLocation() { return this.canGetLocation; } @Override public void onLocationChanged(Location arg0) { // TODO Auto-generated method stub } @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 } }
// ————–Distance.java
public class Distance { private double latitude ; private double longitude; public double getLatitude() { return latitude; } public void setLatitude(double latitude) { this.latitude = latitude; } public double getLongitude() { return longitude; } public void setLongitude(double longitude) { this.longitude = longitude; } }
**该活动应实现LocationListener
在onCreate（）中，写下面的代码**
Boolean network = haveNetworkConnection(); Log.e("network", "---------->" + network); if (!network) { Toast.makeText(getApplicationContext(), "Network is not available", 3000).show(); } SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.googleMap); googleMap = supportMapFragment.getMap(); googleMap.setMyLocationEnabled(true); LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 30000, 0, this); if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) && !locationManager .isProviderEnabled(LocationManager.NETWORK_PROVIDER)) { TextView title = new TextView(context); title.setText("Location Services Not Active"); title.setBackgroundColor(Color.BLACK); title.setPadding(10, 15, 15, 10); title.setGravity(Gravity.CENTER); title.setTextColor(Color.WHITE); title.setTextSize(22); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setCustomTitle(title); // builder.setTitle("Location Services Not Active"); builder.setMessage("Please enable Location Services and GPS"); builder.setPositiveButton("Turn on", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialogInterface, int i) { // Show location settings when the user acknowledges // the alert dialog Intent intent = new Intent( Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivity(intent); finish(); } }); builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.cancel(); } }); builder.show(); } Criteria criteria = new Criteria(); String bestProvider = locationManager.getBestProvider(criteria, true); Location location = locationManager.getLastKnownLocation(bestProvider); if (location == null) { Toast.makeText(getApplicationContext(), "GPS signal not found", 3000).show(); } if (location != null) { Log.e("locatin", "location--" + location); Log.e("latitude at beginning", "@@@@@@@@@@@@@@@" + location.getLatitude()); onLocationChanged(location); }
写一个方法haveNetworkConnection
private boolean haveNetworkConnection() { boolean haveConnectedWifi = false; boolean haveConnectedMobile = false; ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo[] netInfo = cm.getAllNetworkInfo(); for (NetworkInfo ni : netInfo) { if (ni.getTypeName().equalsIgnoreCase("WIFI")) if (ni.isConnected()) haveConnectedWifi = true; if (ni.getTypeName().equalsIgnoreCase("MOBILE")) if (ni.isConnected()) haveConnectedMobile = true; } return haveConnectedWifi || haveConnectedMobile; } @Override public void onLocationChanged(Location location) { LatLng latLng = new LatLng(latitude, longitude); googleMap.addMarker(new MarkerOptions() .position(latLng) .title("Current LOC") .icon(BitmapDescriptorFactory .defaultMarker(BitmapDescriptorFactory.HUE_RED))); googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); googleMap.animateCamera(CameraUpdateFactory.zoomTo(17)); } @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 }
试试这个，希望它能帮助你获得当前的位置，每当位置改变。
class MyClass Implements LocationListener { double currentLatitude, currentLongitude; public void onLocationChanged(Location location) { currentLatitude = location.getLatitude(); currentLongitude = location.getLongitude(); } }
