Emplacement actuel n'est pas automatiquement affiché

Question

Actuellement, je souhaite obtenir l'emplacement actuel de la latitude et de la longitude de l'utilisateur, mais mon code peut être lu jusqu'à ce que j'appuie sur le bouton d'envoi dans l'émulateur. mettez-le à la vue du texte alors que dois-je faire? Quelqu'un s'il vous plaît me conseiller pour résoudre ce problème s'il vous plaît parce que je ne connais pas vraiment le code de localisation.

Voici mon code

package com.example.rex.ota30; 

import android.*; 
import android.Manifest; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.provider.Settings; 
import android.support.v4.app.ActivityCompat; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.google.firebase.database.DatabaseReference; 
import com.google.firebase.database.FirebaseDatabase; 

import static com.example.rex.ota30.R.id.textView; 

public class Search extends AppCompatActivity implements LocationListener { 

private FirebaseDatabase db; 
private DatabaseReference sref, lref; 
private TextView searchun, searchlo, searchla; 
private String un, la, lo; 
private LocationManager lm; 
private LocationListener ll; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_search); 

    db = FirebaseDatabase.getInstance(); 

    sref = db.getReference("users"); 
    lref = db.getReference("userslocation"); 

    searchun = (TextView) findViewById(R.id.sun); 
    Intent i = this.getIntent(); 
    un = i.getStringExtra("username"); 
    searchun.setText(un); 

    searchlo = (TextView) findViewById(R.id.slo); 
    searchla = (TextView) findViewById(R.id.sla); 

    lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 

     return; 
    } 
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, (LocationListener) this); 
} 

@Override 
public void onLocationChanged(Location location) { 

    la = String.valueOf(location.getLatitude()); 
    searchla.setText(la); 

    lo = String.valueOf(location.getLongitude()); 
    searchlo.setText(lo); 

    lref.child(un).child("latitude").setValue(la); 
    lref.child(un).child("longitude").setValue(lo); 
} 

@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"); 
} 
} 

Voici l'exemple de l'emplacement obtenir.

Answer 1

OnLocationChanged est appelée uniquement lorsque l'emplacement a changé.
L'emplacement est donc affiché dans le TextView uniquement lorsque vous appuyez sur le bouton d'envoi.
Si vous voulez afficher l'emplacement depuis le début, essayez cette

protected void onCreate(Bundle savedInstanceState) { 
    ... 
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, (LocationListener) this); 
    ... 
    // add code 
    Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
    la = String.valueOf(location.getLatitude()); 
    searchla.setText(la); 

    lo = String.valueOf(location.getLongitude()); 
    searchlo.setText(lo); 
} 

Answer 2

import android.content.pm.PackageManager; 
import android.location.Location; 
import android.support.annotation.NonNull; 
import android.support.annotation.Nullable; 
import android.support.v4.app.ActivityCompat; 
import android.support.v4.app.FragmentActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Toast; 

import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.location.LocationServices; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.OnMapReadyCallback; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, 
     GoogleApiClient.ConnectionCallbacks, 
     GoogleApiClient.OnConnectionFailedListener, 
     GoogleMap.OnMarkerDragListener, 
     GoogleMap.OnMapLongClickListener, 
     GoogleMap.OnMarkerClickListener, 
     View.OnClickListener { 

    private static final String TAG = "MapsActivity"; 
    private GoogleMap mMap; 
    private double longitude; 
    private double latitude; 
    private GoogleApiClient googleApiClient; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_maps); 

     // Obtain the SupportMapFragment and get notified when the map is ready to be used. 
     SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
       .findFragmentById(R.id.map); 
     mapFragment.getMapAsync(this); 

     //Initializing googleApiClient 
     googleApiClient = new GoogleApiClient.Builder(this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API) 
       .build(); 
    } 


    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 
     mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); 
     // googleMapOptions.mapType(googleMap.MAP_TYPE_HYBRID) 
        // .compassEnabled(true); 

     // Add a marker in Sydney and move the camera 
     LatLng india = new LatLng(-34, 151); 
     mMap.addMarker(new MarkerOptions().position(india).title("Marker in India")); 
     mMap.moveCamera(CameraUpdateFactory.newLatLng(india)); 
     mMap.setOnMarkerDragListener(this); 
     mMap.setOnMapLongClickListener(this); 
    } 

    //Getting current location 
    private void getCurrentLocation() { 
     mMap.clear(); 
     if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      // TODO: Consider calling 
      // ActivityCompat#requestPermissions 
      // here to request the missing permissions, and then overriding 
      // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
      //           int[] grantResults) 
      // to handle the case where the user grants the permission. See the documentation 
      // for ActivityCompat#requestPermissions for more details. 
      return; 
     } 
     Location location = LocationServices.FusedLocationApi.getLastLocation(googleApiClient); 
     if (location != null) { 
      //Getting longitude and latitude 
      longitude = location.getLongitude(); 
      latitude = location.getLatitude(); 

      //moving the map to location 
      moveMap(); 
     } 
    } 

    private void moveMap() { 
     /** 
     * Creating the latlng object to store lat, long coordinates 
     * adding marker to map 
     * move the camera with animation 
     */ 
     LatLng latLng = new LatLng(latitude, longitude); 
     mMap.addMarker(new MarkerOptions() 
       .position(latLng) 
       .draggable(true) 
       .title("Marker in India")); 

     mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
     mMap.animateCamera(CameraUpdateFactory.zoomTo(15)); 
     mMap.getUiSettings().setZoomControlsEnabled(true); 


    } 

    @Override 
    public void onClick(View view) { 
     Log.v(TAG,"view click event"); 
    } 

    @Override 
    public void onConnected(@Nullable Bundle bundle) { 
     getCurrentLocation(); 
    } 

    @Override 
    public void onConnectionSuspended(int i) { 

    } 

    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 

    } 

    @Override 
    public void onMapLongClick(LatLng latLng) { 
     // mMap.clear(); 
     mMap.addMarker(new MarkerOptions().position(latLng).draggable(true)); 
    } 

    @Override 
    public void onMarkerDragStart(Marker marker) { 
     Toast.makeText(MapsActivity.this, "onMarkerDragStart", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public void onMarkerDrag(Marker marker) { 
     Toast.makeText(MapsActivity.this, "onMarkerDrag", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public void onMarkerDragEnd(Marker marker) { 
     // getting the Co-ordinates 
     latitude = marker.getPosition().latitude; 
     longitude = marker.getPosition().longitude; 

     //move to current position 
     moveMap(); 
    } 

    @Override 
    protected void onStart() { 
     googleApiClient.connect(); 
     super.onStart(); 
    } 

    @Override 
    protected void onStop() { 
     googleApiClient.disconnect(); 
     super.onStop(); 
    } 


    @Override 
    public boolean onMarkerClick(Marker marker) { 
     Toast.makeText(MapsActivity.this, "onMarkerClick", Toast.LENGTH_SHORT).show(); 
     return true; 
    } 

}