How to get the current location for this map code? Also trying to get vehicle data from the server when I open the map

Question

package com.androidhive.googlemaps; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import android.graphics.drawable.Drawable; import android.location.LocationManager; import android.os.Bundle; import android.util.Log; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.LocationSource.OnLocationChangedListener; 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.Overlay; import com.google.android.maps.OverlayItem; public class AndroidGoogleMapsActivity extends MapActivity { private Button login; private EditText username, password; private GoogleMap mMap; private OnLocationChangedListener mListener; private LocationManager locationManager; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Displaying Zooming controls MapView mapView = (MapView) findViewById(R.id.mapView); mapView.setBuiltInZoomControls(true); /** * Changing Map Type * */ mapView.setSatellite(true); // Satellite View mapView.setStreetView(true); // Street View mapView.setTraffic(true); // Traffic view /** * showing location by Latitude and Longitude * */ MapController mc = mapView.getController(); double lat = Double.parseDouble("48.85827758964043"); double lon = Double.parseDouble("2.294543981552124"); GeoPoint geoPoint = new GeoPoint((int)(lat * 1E6), (int)(lon * 1E6)); mc.animateTo(geoPoint); mc.setZoom(15); mapView.invalidate(); /** * Placing Marker * */ List<Overlay> mapOverlays = mapView.getOverlays(); Drawable drawable = this.getResources().getDrawable(R.drawable.mark_red); AddItemizedOverlay itemizedOverlay = new AddItemizedOverlay(drawable, this); OverlayItem overlayitem = new OverlayItem(geoPoint, "Hello", "Sample Overlay item"); itemizedOverlay.addOverlay(overlayitem); mapOverlays.add(itemizedOverlay); } @Override protected boolean isRouteDisplayed() { return false; } 

I am new to android. I do not want to include the vehicle code retrieved from the server data. The list of vehicles means that when I open the card, it will give an indication of the receipt of the vehicle from the server. Also want to know the current location on the map. Teach me the best solution for this code. thanks in advance.

Answer 1

 import java.io.IOException; import java.util.List; import java.util.Locale; import android.app.Activity; import android.content.Context; import android.location.Address; import android.location.Geocoder; import android.location.GpsSatellite; import android.location.GpsStatus.Listener; import android.location.Location; import android.location.GpsStatus; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.os.SystemClock; import android.util.Log; import android.view.Menu; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { String TAG = "GPS Location"; private TextView myLongitude; private TextView myAddress ; private TextView myLatitude; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); myLatitude = (TextView)findViewById(R.id.mylatitude); myLongitude = (TextView)findViewById(R.id.mylongitude); myAddress = (TextView)findViewById(R.id.myaddress); LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); LocationListener locationListener = new MyLocationListener(); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 10, locationListener); } class MyLocationListener implements LocationListener{ @Override public void onLocationChanged(Location loc) { System.out.println("location change"); Toast.makeText( getBaseContext(), "Location changed: Lat: " + loc.getLatitude() + " Lng: " + loc.getLongitude(), Toast.LENGTH_LONG).show(); String longitude = "Longitude: " + loc.getLongitude(); Log.v(TAG, longitude); myLongitude.setText(longitude); String latitude = "Latitude: " + loc.getLatitude(); Log.v(TAG, latitude); myLatitude.setText(latitude); /*-------to get City-Name from coordinates -------- */ String cityName = null; Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault()); // List<Address> addresses; try { List<Address> addresses = gcd.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); if(addresses != null) { Address returnedAddress = addresses.get(0); StringBuilder strReturnedAddress = new StringBuilder("Address:\n"); for(int i=0; i<returnedAddress.getMaxAddressLineIndex(); i++) { strReturnedAddress.append(returnedAddress.getAddressLine(i)).append("\n"); } myAddress.setText(strReturnedAddress.toString()); Toast.makeText(getBaseContext(), strReturnedAddress.toString(),Toast.LENGTH_LONG).show(); } else{ // myAddress.setText("No Address returned!"); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); // myAddress.setText("Canont get Address!"); } /* try { addresses = gcd.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1); if (addresses.size() > 0) System.out.println(addresses.get(0).getLocality()); cityName = addresses.get(0).getLocality(); } catch (IOException e) { e.printStackTrace(); } String s = longitude + "\n" + latitude + "\n\nMy Current City is: " + cityName; Toast.makeText( getBaseContext(),"location:"+s, Toast.LENGTH_LONG).show();*/ } @Override public void onProviderDisabled(String arg0) { System.out.println("location disable"); Toast.makeText(MainActivity.this, " location disable", Toast.LENGTH_LONG).show(); } @Override public void onProviderEnabled(String arg0) { System.out.println("location enable"); Toast.makeText(MainActivity.this, " location enable", Toast.LENGTH_LONG).show(); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { System.out.println("location status change"); Toast.makeText(MainActivity.this, " location status change.....", Toast.LENGTH_LONG).show(); } 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); } } } 

and XML:

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Location" android:background="#505050" /> <TextView android:id="@+id/mylatitude" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <TextView android:id="@+id/mylongitude" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Address" android:background="#505050" /> <TextView android:id="@+id/myaddress" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout> 

use this permission

  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 

make sure the hardware gps device.