Java 无法在地图中显示当前位置

我想在地图上显示当前位置。为此我找到了

这是我的全部活动：

import android.content.IntentSender;
import android.location.Location;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
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.MarkerOptions;


public class MainMapsActivity extends FragmentActivity implements OnMapReadyCallback,
        GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener,
        LocationListener {

    private GoogleMap mMap;
    private GoogleApiClient mGoogleApiClient;
    public static final String TAG = MainMapsActivity.class.getSimpleName();
    private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
    private LocationRequest mLocationRequest;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i(TAG, "oncreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_maps);
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);

        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();

        mLocationRequest = LocationRequest.create()
                .setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
                .setInterval(10 * 1000)
                .setFastestInterval(1 * 1000);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

    }

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

    @Override
    public void onPause(){
        super.onPause();
        if(mGoogleApiClient.isConnected()){
            LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
            mGoogleApiClient.disconnect();
        }
    }

    @Override
    public void onConnected(Bundle bundle) {
        Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
        if (location == null) {
            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
        }
        else {
            handleNewLocation(location);
        };
    }

    @Override
    public void onConnectionSuspended(int i) {
        Log.i(TAG, "Location services suspended. Please reconnect.");
    }

    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        if (connectionResult.hasResolution()) {
            try {
                // Start an Activity that tries to resolve the error
                connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
            } catch (IntentSender.SendIntentException e) {
                e.printStackTrace();
            }
        } else {
            Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
        }
    }

    private void handleNewLocation(Location location) {
        double currentLatitude = location.getLatitude();
        double currentLongitude = location.getLongitude();
        LatLng latLng = new LatLng(currentLatitude, currentLongitude);

        MarkerOptions options = new MarkerOptions()
                .position(latLng)
                .title("I am here!");
        mMap.addMarker(options);
        mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    }

    @Override
    public void onLocationChanged(Location location) {
        handleNewLocation(location);
    }


}

这是我的身材。格雷德尔：

在清单中，我拥有以下权限：

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

当我在emulator中运行应用程序时，它会显示空映射。我是android新手，所以如果出现任何错误，我也不会感到惊讶

---

我想到的第一件事是，我必须在onMapReady中调用handleNewLocation方法，但在那里我无法传递latlong参数，正如我所知，android emulator或genymotion emulator默认情况下无法运行Google Maps。我不知道你在用哪个模拟器。对于本机emulator，请遵循

在genymotion上，您没有安装google play服务，因此使用google地图的活动将完全崩溃。要在genymotion上安装google play服务，请点击以下链接：

---

但是，最好只使用物理设备进行与地图相关的操作

你用过谷歌api吗emulator@Ajinkya不你能更详细地解释一下吗？再次看到你给出的博客链接他使用谷歌api arm EABI模拟器尝试使用它我使用的是Nexus 5 android studio本机模拟器。。如果我手动操作，它会显示标记，但我想插入当前位置，这就是问题所在。我测试了你的代码，它在我的物理设备上运行良好。在物理设备中，我必须启用位置，以便使用gps跟踪设备的位置。我希望你也在你的模拟器中这样做。

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