通过Android Google API获取纬度和经度

我想创建一个android应用程序，该应用程序可以为我提供每个时间段的纬度和经度。我阅读了关于新的Android API以及如何获取最后的位置，但我仍然不知道如何使用它。我试图使用谷歌API来获取最后的位置，但它不起作用。这里是我的代码：通过Android Google API获取纬度和经度

import android.location.Location; 
import android.os.Bundle; 
import android.support.v7.app.ActionBarActivity; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 

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.LocationServices; 


public class MainActivity extends ActionBarActivity 
implements ConnectionCallbacks, OnConnectionFailedListener { 

private GoogleApiClient mGoogleApiClient; 

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

protected synchronized void buildGoogleApiClient() { 
    mGoogleApiClient = new GoogleApiClient.Builder(this) 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this) 
      .addApi(LocationServices.API) 
      .build(); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

@Override 
public void onConnected(Bundle bundle) { 
    Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
      mGoogleApiClient); 
    if (mLastLocation != null) { 
     Log.d("mLatitudeText", String.valueOf(mLastLocation.getLatitude())); 
     Log.d("mLatitudeText", String.valueOf(mLastLocation.getLongitude())); 

    } 
} 




@Override 
public void onConnectionSuspended(int i) { 

} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 

}

} 可以请你告诉我什么是使用谷歌API的最佳方式和是否有任何其他的API，可以给我的位置。由于提前，

来源

2015-10-02 m7md

使用'GeoCoder'从地名得到'LatLng'受益。 – Shvet

非常感谢。你能举个例子来说明谁在使用它。 – m7md

首先包括这下依赖

compile 'com.google.android.gms:play-services:7.8.0'

那么进口的gradle这个应用如下

import android.bluetooth.BluetoothAdapter; 
import android.content.Context; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.Fragment; 
import android.support.v4.content.ContextCompat; 
import android.support.v4.widget.SwipeRefreshLayout; 
import android.support.v7.widget.RecyclerView; 
import android.util.DisplayMetrics; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Spinner; 
import android.widget.Toast; 
public class OffersFragment extends Fragment { 
    GoogleMap map; 
    LatLngBounds visibleLatLngBounds; 
    LatLng coordinate; 
    int distanceAway = 5000; 
public OffersFragment(){} 
@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     View view = inflater.inflate(R.layout.fragment_offers, container, false); 


     MapsInitializer.initialize(getActivity()); 

     realm = Realm.getInstance(getActivity()); 

     setupMap(savedInstanceState); 

     recyclerView.setLayoutManager(new WrappingLinearLayoutManager(getActivity())); 
     recyclerView.setNestedScrollingEnabled(false); 
     recyclerView.setHasFixedSize(false); 

     swipeRefreshLayout.setColorSchemeResources(R.color.color_primary, R.color.color_accent); 

     swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { 
      @Override 
      public void onRefresh() { 
       refreshOffers(); 
      } 
     }); 

     ArrayAdapter<CharSequence> kmArrayAdapter = ArrayAdapter 
       .createFromResource(this.getContext(), R.array.string_array_kilometers_away, 
         android.R.layout.simple_spinner_item); 

     kmArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

     kmRangeSpinner.setAdapter(kmArrayAdapter); 

     kmRangeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
       map.clear(); 
       if (coordinate != null) { 
        if (id == 0) setDistanceAway(5000); 
        else if (id == 1) setDistanceAway(10000); 
        else if (id == 2) setDistanceAway(20000); 
        else if (id == 3) setDistanceAway(50000); 
        else if (id == 4) setDistanceAway(200000); 
       } 
      } 

      @Override 
      public void onNothingSelected(AdapterView<?> parent) { 
       int id = parent.getId(); 

       if (id == 0) setDistanceAway(5000); 
       else if (id == 1) setDistanceAway(10000); 
       else if (id == 2) setDistanceAway(20000); 
       else if (id == 3) setDistanceAway(50000); 
       else if (id == 4) setDistanceAway(200000); 
      } 
     }); 

     ArrayAdapter<CharSequence> categoriesAdapter = ArrayAdapter 
       .createFromResource(this.getContext(), R.array.string_array_offer_categories, 
         android.R.layout.simple_spinner_item); 

     categoriesAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

     categoriesSpinner.setAdapter(categoriesAdapter); 

     categoriesSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
       if(visibleLatLngBounds!=null){ 
        try { 
         map.clear(); 
         loadOffers(); 
        } catch (ParseException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 

      @Override 
      public void onNothingSelected(AdapterView<?> parent) { 

      } 
     }); 

     return view; 
    } 

    @Override 
    public void onViewCreated(View view, Bundle savedInstanceState) { 
     super.onViewCreated(view, savedInstanceState); 

     // Check if device supports Bluetooth Low Energy. 
     if (!beaconManager.hasBluetooth()) { 
      Toast.makeText(getActivity(), "Device does not have Bluetooth Low Energy", Toast.LENGTH_LONG).show(); 
      return; 
     } 

     // If Bluetooth is not enabled, let user enable it. 
     if (!beaconManager.isBluetoothEnabled()) { 
      Snackbar.make(view, "Open Bluetooth Low Energy to discover exclusive offers", Snackbar.LENGTH_LONG).setAction("Discover", new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
        startActivity(enableBtIntent); 
       } 
      }).show(); 
     } 
    } 

    private void setupMap(Bundle savedInstanceState){ 
     mapView.onCreate(savedInstanceState); 

     // Gets to GoogleMap from the MapView and does initialization stuff 
     map = mapView.getMap(); 
     map.getUiSettings().setMyLocationButtonEnabled(false); 
     map.setMyLocationEnabled(true); 
     map.getUiSettings().setScrollGesturesEnabled(false); 
     map.getUiSettings().setTiltGesturesEnabled(false); 
     map.getUiSettings().setRotateGesturesEnabled(false); 
     map.getUiSettings().setZoomGesturesEnabled(false); 

     map.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() { 
      @Override 
      public void onMapLoaded() { 
       visibleLatLngBounds = map.getProjection() 
         .getVisibleRegion().latLngBounds; 
       if (visibleLatLngBounds != null) { 
        try { 
         loadOffers(); 
        } catch (ParseException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 
     }); 

     map.setOnCameraChangeListener(new GoogleMap.OnCameraChangeListener() { 
      @Override 
      public void onCameraChange(CameraPosition cameraPosition) { 
       visibleLatLngBounds = map.getProjection() 
         .getVisibleRegion().latLngBounds; 
       if (visibleLatLngBounds != null) { 
        try { 
         loadOffers(); 
        } catch (ParseException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 
     }); 

     map.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() { 
      @Override 
      public void onMyLocationChange(Location location) { 
       double lat = location.getLatitude(); 
       double lng = location.getLongitude(); 
       coordinate = new LatLng(lat, lng); 

       // Updates the location and zoom of the MapView 
       animateToLocation(coordinate, getDistanceAway()); 
       map.setOnMyLocationChangeListener(null); 
      } 
     }); 

     // Needs to call MapsInitializer before doing any CameraUpdateFactory calls 
     MapsInitializer.initialize(this.getActivity()); 

     Criteria criteria = new Criteria(); 
     LocationManager locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE); 
     String provider = locationManager.getBestProvider(criteria, false); 

     if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 

      requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},MY_LOCATION_REQUEST_CODE); 

     } 
     else{ 
      map.setMyLocationEnabled(true); 
     } 

     if (locationManager.getLastKnownLocation(provider)!=null){ 
      Location location = locationManager.getLastKnownLocation(provider); 
      double lat = location.getLatitude(); 
      double lng = location.getLongitude(); 
      coordinate = new LatLng(lat, lng); 

      // Updates the location and zoom of the MapView 
      animateToLocation(coordinate, getDistanceAway()); 
     } 

     else{ 
      //Zoom in to Nairobi 
      coordinate = new LatLng(-1.277001, 36.816498); 
      animateToLocation(coordinate, getDistanceAway()); 
     } 


//  Marker galleria = map.addMarker(new MarkerOptions().position(GALLERIA) 
//    .title("Safaricom Shop, Galleria")); 
// 
//  Marker westgate = map.addMarker(new MarkerOptions().position(WESTGATE) 
//    .title("Safaricom Shop, Westgate")); 


    } 

    public void loadOffers() throws ParseException { 

     RealmResults<Offer> offers; 

     if(categoriesSpinner.getSelectedItemId()==0){ 
      offers = realm.where(Offer.class).between(Offer.VARIABLE_LATITUDE,visibleLatLngBounds.southwest.latitude,visibleLatLngBounds.northeast.latitude).between(Offer.VARIABLE_LONGITUDE, visibleLatLngBounds.southwest.longitude, visibleLatLngBounds.northeast.longitude).findAll(); 
     } 
     else { 
      offers = realm.where(Offer.class).between(Offer.VARIABLE_LATITUDE,visibleLatLngBounds.southwest.latitude,visibleLatLngBounds.northeast.latitude).between(Offer.VARIABLE_LONGITUDE, visibleLatLngBounds.southwest.longitude, visibleLatLngBounds.northeast.longitude).equalTo(Offer.VARIABLE_CATEGORY,categoriesSpinner.getSelectedItemId()).findAll(); 
     } 

     Log.d(LOG_TAG, "NorthEast latlng:"+visibleLatLngBounds.northeast.latitude+" "+visibleLatLngBounds.northeast.longitude+"SouthWest latlng:"+visibleLatLngBounds.southwest.latitude+" "+visibleLatLngBounds.southwest.longitude); 
     offersAdapter = new OffersAdapter(getActivity(), offers); 
     recyclerView.setAdapter(offersAdapter); 

     for(Offer offer: offers){ 
      map.addMarker(new MarkerOptions().position(new LatLng(offer.getStore().getLatitude(), offer.getStore().getLongitude())).title(offer.getStore().getName())); 
     } 

    } 
    public void refreshOffers(){ 

     String urlJsonArray = "************/viewjsonshopoffers.php"; 
     request = new JsonArrayRequest(urlJsonArray, 
       new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray response) { 
         Log.d(LOG_TAG, response.toString()); 
         swipeRefreshLayout.setRefreshing(false); 
         try { 

          realm.beginTransaction(); 

          realm.clear(Offer.class); 

          realm.commitTransaction(); 

          for (int i = 0; i < response.length(); i++) { 

           JSONObject jsonResponse = (JSONObject) response.get(i); 

           int storeId = jsonResponse.getInt("shop_id"); 
           String storeName = jsonResponse.getString("shop_name"); 
           String storeStreetName = jsonResponse.getString("shop_streetname"); 
           String storeStreetDesc = jsonResponse.getString("shop_streetdesc"); 
           String storeCity = jsonResponse.getString("shop_city"); 
           double storeLatitude = jsonResponse.getDouble("shop_latitude"); 
           double storeLongitude = jsonResponse.getDouble("shop_longitude"); 

           Store store = new Store(storeId, storeName, storeStreetName, storeStreetDesc, storeCity, storeLatitude, storeLongitude); 

           int offerId = jsonResponse.getInt("offer_id"); 
           String offerName = jsonResponse.getString("offer_name"); 
           String offerPriceDescription = jsonResponse.getString("offer_string_price_description"); 
           int offerPrice = jsonResponse.getInt("offer_int_price"); 
           String offerDescription = jsonResponse.getString("offer_description"); 
           String offerNotificationMessage = jsonResponse.getString("offer_notification_message"); 
           Date offerDateDue = DateUtils.getDateInMillis(jsonResponse.getString("offer_datedue")); 
           int offerKeyword = jsonResponse.getInt("offer_keyword"); 
           int offerBeaconMajor = jsonResponse.getInt("offer_beacon_major"); 
           String offerImageUrl = jsonResponse.getString("offer_url"); 

           Offer offer = new Offer(offerId, offerName, offerPriceDescription, offerPrice, offerDescription, offerNotificationMessage, offerDateDue, store, offerKeyword, offerBeaconMajor, offerImageUrl); 

           realm.beginTransaction(); 

           realm.copyToRealmOrUpdate(offer); 

           realm.commitTransaction(); 

           map.clear(); 

           loadOffers(); 

          } 

         } catch (JSONException e) { 
          e.printStackTrace(); 
         } catch (ParseException e) { 
          e.printStackTrace(); 
         } 
        } 

       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       VolleyLog.d(LOG_TAG, "Error: " + error.getMessage()); 
       swipeRefreshLayout.setRefreshing(false); 
       error.printStackTrace(); 
      } 

     }); 

     AppController.getInstance().addToRequestQueue(request, LOG_TAG); 
    } 

    private void animateToLocation(LatLng coordinate, int meters) { 
     DisplayMetrics displaymetrics = new DisplayMetrics(); 
     if(getActivity().getWindowManager()!=null){ 
      getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics); 
      int width = displaymetrics.widthPixels; 
      int metersRecalculate = meters *10; 

      double equatorLength = 40075004; // in meters 
      double widthInPixels = width; 
      double metersPerPixel = equatorLength/256; 
      int zoomLevel = 1; 
      while ((metersPerPixel * widthInPixels) > metersRecalculate) { 
       metersPerPixel /= 2; 
       ++zoomLevel; 
      } 

      CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(coordinate, zoomLevel); 
      map.animateCamera(cameraUpdate); 
     } 


    } 

    @Override 
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
     super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
     if (requestCode == MY_LOCATION_REQUEST_CODE) { 
      if (permissions.length == 1 && 
        permissions[0] == Manifest.permission.ACCESS_FINE_LOCATION && 
        grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
       map.setMyLocationEnabled(true); 
      } else { 
       // Permission was denied. Display an error message. 
      } 

     } 
    } 

    public int getDistanceAway() { 
     return distanceAway; 
    } 

    public void setDistanceAway(int distanceAway) { 
     this.distanceAway = distanceAway; 
     animateToLocation(coordinate, this.distanceAway); 
    } 

    @Override 
    public void onResume() { 
     mapView.onResume(); 
     super.onResume(); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     mapView.onDestroy(); 
     if(request!=null){ 
      request.cancel(); 
     } 
    } 

    @Override 
    public void onLowMemory() { 
     super.onLowMemory(); 
     mapView.onLowMemory(); 
    } 

}

我没有修改太多，因为这项目有一个场景˚F找到当前位置并要求用户在获取用户的最后位置时更新他的位置。

对于那些谁使用领域也可以在此项目中的境界与地图使用

来源

2015-10-02 06:22:31 Goodlife

通过Android Google API获取纬度和经度

回答

相关问题