地理定位android studio

Question

我正在用MapsActivity設計一個應用程序，它會更新我的位置，但是當我運行它時，我只能得到世界地圖而不告訴我我的位置。我沒有看到錯誤，我嘗試了很多東西... 問候和感謝。 這是代碼：

package com.example.dani.etakemongo.ProductionFrontends; 

import android.Manifest; 
import android.content.Context; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.support.design.widget.FloatingActionButton; 
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.Button; 
import android.widget.Toast; 

import com.example.dani.etakemongo.DevelopFrontends.Menu; 
import com.example.dani.etakemongo.Modelo.Usuario; 
import com.example.dani.etakemongo.R; 
import com.google.android.gms.maps.CameraUpdate; 
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.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 

import java.io.Serializable; 


public class MapsActivity extends FragmentActivity implements OnMapReadyCallback { 

String tag = "MapsActivity"; 
private GoogleMap mMap; 
private Marker marcador; 
double lat = 0.0; 
double ing = 0.0; 
String email2, emailaMenu; 
int idusuario, idusuarioaMenu; 


FloatingActionButton menu; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_maps); 
    Log.d(tag, "Event onCreate()"); 


    email2 = getIntent().getExtras().getString("email"); 
    emailaMenu = email2; 


    //BOTON MENU 
    menu = (FloatingActionButton) findViewById(R.id.fab_menu); 
    menu.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      try { 
       goToMenu(v); 
      } catch (Exception ex) { 
       String error = ex.getMessage(); 
       Toast.makeText(MapsActivity.this, error, Toast.LENGTH_SHORT).show(); 
      } 
     } 
    }); 



    // 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); 
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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; 
    } 
    mMap.setMyLocationEnabled(true); 
} 


/** 
* Manipulates the map once available. 
* This callback is triggered when the map is ready to be used. 
* This is where we can add markers or lines, add listeners or move the camera. In this case, 
* we just add a marker near Sydney, Australia. 
* If Google Play services is not installed on the device, the user will be prompted to install 
* it inside the SupportMapFragment. This method will only be triggered once the user has 
* installed Google Play services and returned to the app. 
*/ 
@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
    miUbicacion(); 

} 

//Metodo para incluir un marker, CameraUpdate para centrar la camara a la posicion del marker 
private void agregarMarcador(double lat, double ing) { 

    LatLng coordenadas = new LatLng(lat, ing); 
    CameraUpdate miUbicacion = CameraUpdateFactory.newLatLngZoom(coordenadas, 16); 
    if (marcador != null) 
     marcador.remove(); //Si el marcador diferente de null le añadimos propiedades, titulo, imagen 
    marcador = mMap.addMarker(new MarkerOptions() 
      .position(coordenadas) 
      .title("Mi posicion") 
      .icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher))); 
    mMap.animateCamera(miUbicacion); 
} 

//Metodo para obtener latitud y longitud de nuestra posicion actual 
private void actualizarUbicacion(Location location) { 
    if (location != null) { //Comrpobamos la localizacion recibida es diferente de null antes de asignar valores a las valariables 
     lat = location.getLatitude(); 
     ing = location.getLongitude(); 
     agregarMarcador(lat, ing); 
    } 
} 

//Implementamos un objeto del tipo LocationListener, su funcion es estar atento a cambio de localidad recividio por el GPS 
LocationListener locListener = new LocationListener() { 
    @Override 
    public void onLocationChanged(Location location) { 
     actualizarUbicacion(location);//Llamamos anuestro metodo para actualizar la ubicacion 
    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 

    } 

    @Override 
    public void onProviderEnabled(String provider) { 

    } 

    @Override 
    public void onProviderDisabled(String provider) { 

    } 
}; 

//Metodo para obtener servicio de posicionamiento, nos da la ultima posicion obtenida y se actualiza cada 15 segundos 

private void miUbicacion() { 

    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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; 
    } 
    LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
    Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
    actualizarUbicacion(location); 
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,10000,0,locListener); 
} 
@Override 
protected void onStart() { 
    super.onStart(); 
    Log.d(tag, "Event onStart()"); 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    Log.d(tag, "Event onResume()"); 

} 

@Override 
protected void onPause() { 
    super.onPause(); 
    Log.d(tag, "Event onPause()"); 

} 

@Override 
protected void onStop() { 
    super.onStop(); 
    Log.d(tag, "Event onStop()"); 

} 

@Override 
protected void onRestart() { 
    super.onRestart(); 
    Log.d(tag, "Event onRestart()"); 

} 

@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    Log.d(tag, "Event onDestroy()"); 

} 


public void goToMenu(View view){ 
    Intent intent = new Intent(MapsActivity.this, Menu.class); 
    intent.putExtra("email2",emailaMenu); 
    startActivityForResult(intent, 800); 
} 
} 

Answer 1

加入這行代碼在onMapReady

mGoogleMap.setMyLocationEnabled(true); 
@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
    miUbicacion(); 
    if (PermissionUtils.checkPermission(HomeActivity_.this, 
        PermissionConstant.LOCATION_PERMISSION) 
        == PackageManager.PERMISSION_GRANTED) { 
       mMap.setMyLocationEnabled(true); 
      } 

}