在Google Map中顯示我的當前位置

Question

最後，我成功顯示地圖，現在，我想顯示我的當前位置，我嘗試了使用這些代碼，但它沒有工作，當我點擊我的位置按鈕右上角。

AndroidManifest.xml中

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.INTERNET"/> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
<uses-permission android:name="com.example.hp.testmap.MAPS_RECEIVE"></uses-permission> 
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 

<permission 
    android:name="com.example.hp.testmap.permission.MAPS_RECEIVE" 
    android:protectionLevel="signature"/> 

    <uses-feature 
     android:glEsVersion="0x00020000" 
     android:required="true"/> 

MapsActivity.java

public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
    mMap.setMyLocationEnabled(true); 
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 

     LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 

     Criteria criteria = new Criteria(); 

     String provider = locationManager.getBestProvider(criteria, true); 

     Location myLocation = locationManager.getLastKnownLocation(provider); 

     mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 

     double latitude = myLocation.getLatitude(); 

     double longitude = myLocation.getLongitude(); 

     LatLng latLng = new LatLng(latitude, longitude); 

     mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 

     mMap.animateCamera(CameraUpdateFactory.zoomTo(20)); 
     return; 
    } 

} 

Answer 1

USe this Code for current Location 

googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
     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; 
     } 
     googleMap.setMyLocationEnabled(true); 
     googleMap.getUiSettings().setZoomControlsEnabled(false); 
     googleMap.getUiSettings().setMyLocationButtonEnabled(true); 
     googleMap.getUiSettings().setCompassEnabled(true); 
     googleMap.getUiSettings().setRotateGesturesEnabled(true); 
     googleMap.getUiSettings().setZoomGesturesEnabled(true); 

     if (locationManager == null) { 
      locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 
     } 
     if (locationManager.getAllProviders().contains(LocationManager.GPS_PROVIDER)) { 
      isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 
      isNetworkProviderEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
      if (isGPSEnabled) { 
       location = getLastLocationByProvider(locationManager, LocationManager.GPS_PROVIDER, getApplicationContext()); 
      } else if (isNetworkProviderEnabled) { 
       location = getLastLocationByProvider(locationManager, LocationManager.NETWORK_PROVIDER, getApplicationContext()); 
      } 
      if (location != null) { 
       latitude = location.getLatitude(); 
       longitude = location.getLongitude(); 
      } else { 
       if (isNetworkProviderEnabled) { 
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 100000, 1, this); 
        provider_info = LocationManager.NETWORK_PROVIDER; 
       } else if (isGPSEnabled) { 
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100000, 1, this); 
        provider_info = LocationManager.GPS_PROVIDER; 
       } else { 

        alertDialog = Util.showOkDialog(new View.OnClickListener() { 
         @Override 
         public void onClick(View view) { 
          if (Env.currentActivity != null) { 
           if (Env.currentActivity instanceof LocationActivity) { 
            try { 
             gotoSettings(); 
            } catch (Exception e) { 
             e.printStackTrace(); 
            } 
           } 

          } 
          if (alertDialog != null) { 
           alertDialog.dismiss(); 
           alertDialog = null; 
          } 

         } 
        }, this.getResources().getString(R.string.location_service_validation)); 

       } 

       location = locationManager.getLastKnownLocation(provider_info); 
       if (location != null) { 
        latitude = location.getLatitude(); 
        longitude = location.getLongitude(); 
       } 
      } 


      MarkerOptions marker = new MarkerOptions().position(
        new LatLng(latitude, longitude)) 
        .title(getFullAddressLine(this)); 
      marker.icon(BitmapDescriptorFactory 
        .defaultMarker(BitmapDescriptorFactory.HUE_GREEN)); 

      googleMap.addMarker(marker); 
      CameraPosition cameraPosition = new CameraPosition.Builder() 
        .target(new LatLng(latitude, 
          longitude)).zoom(15).build(); 
      googleMap.animateCamera(CameraUpdateFactory 
        .newCameraPosition(cameraPosition)); 

Answer 2

閱讀下列文檔 - https://developers.google.com/maps/documentation/android-api/location#the_my_location_layer

可能的複製 - how to get current location in google map android

Answer 3

private GoogleApiClient mGoogleApiClient; 
private GoogleMap mMap; 

實現這個聽衆

LocationListener, GoogleApiClient.ConnectionCallbacks, 
     GoogleApiClient.OnConnectionFailedListener 

**//onCreateView or onCreate method** 


if (mGoogleApiClient == null) { 
      mGoogleApiClient = new GoogleApiClient.Builder(mActivity) 
        .addApi(LocationServices.API).addConnectionCallbacks(this) 
        .addOnConnectionFailedListener(this).build(); 
      mGoogleApiClient.connect(); 
     } 

@覆蓋方法

@Override 
    public void onConnected(@Nullable Bundle bundle) { 
     if (ContextCompat.checkSelfPermission(mActivity, 
       android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(mActivity, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) { 
      Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
        mGoogleApiClient); 
      if (mLastLocation != null) 
       onLocationChanged(mLastLocation); 
      return; 
     } 

    } 




@Override 
    public void onLocationChanged(Location location) { 
     if (location != null) { 
     mMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(),location.getLongitude()))); 
       mMap.animateCamera(CameraUpdateFactory.zoomTo(6), 5000, null); 

     } 
    } 

希望你的任務完成。

Answer 4

public void showMap() { 

    mapFragment = (SupportMapFragment)getChildFragmentManager().findFragmentById(R.id.map); 
    if (map == null) { 
     map = mapFragment.getMap(); 
    } 


    // Enable Zoom 
    map.getUiSettings().setZoomGesturesEnabled(true); 

    //set Map TYPE 
    map.setMapType(GoogleMap.MAP_TYPE_NORMAL); 

    //enable Current location Button 
    map.setMyLocationEnabled(true); 

    LocationManager locationManager = (LocationManager)getActivity().getSystemService(getActivity().LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 
    String bestProvider = locationManager.getBestProvider(criteria, true); 
    if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), 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 = locationManager.getLastKnownLocation(bestProvider); 
    if (location != null) { 
     onLocationChanged(location); 
    } 
    locationManager.requestLocationUpdates(bestProvider, 2000, 0, this); 
} 

@Override 
public void onLocationChanged(Location location) { 

    latitude= location.getLatitude(); 
    longitude=location.getLongitude(); 

    LatLng loc = new LatLng(latitude, longitude); 

    if (marker!=null){ 
     marker.remove(); 
    } 

    marker= map.addMarker(new MarkerOptions().position(loc).title("Sparx IT Solutions")); 
    map.moveCamera(CameraUpdateFactory.newLatLng(loc)); 
    map.animateCamera(CameraUpdateFactory.newLatLngZoom(loc, 16.0f)); 

} 

@Override 
public void onProviderDisabled(String provider) { 

    Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
    startActivity(intent); 
    Toast.makeText(getActivity().getBaseContext(), "Gps is turned off!!", 
      Toast.LENGTH_SHORT).show(); 
} 

@Override 
public void onProviderEnabled(String provider) { 

    Toast.makeText(getActivity().getBaseContext(), "Gps is turned on!! ", 
      Toast.LENGTH_SHORT).show(); 
} 

Answer 5

使用以下代碼。

//Zoom to the current location 
    public Location getMyLocation() { 
     LocationManager locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE); 
     Criteria criteria = new Criteria(); 

     Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false)); 
     if (location != null) 
     { 
      map.animateCamera(CameraUpdateFactory.newLatLngZoom(
        new LatLng(location.getLatitude(), location.getLongitude()), 13)); 

      CameraPosition cameraPosition = new CameraPosition.Builder() 
        .target(new LatLng(location.getLatitude(), location.getLongitude()))  // Sets the center of the map to location user 
        .zoom(17)     // Sets the zoom 
        .bearing(90)    // Sets the orientation of the camera to east 
        .tilt(40)     // Sets the tilt of the camera to 30 degrees 
        .build();     // Creates a CameraPosition from the builder 
      map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 

     } 

     return location; 
    } 

然後調用此方法insode您的onCreate

希望這有助於:)