如何在Android App中使用Google API获取当前GPS位置(经度 – 纬度)？

概述我想使用Google API获取GPS位置. 我的代码： mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .ad 我想使用Google Api获取GPS位置.

我的代码：

mGoogleapiclient = new Googleapiclient.Builder(this)                .addConnectionCallbacks(this)                .addOnConnectionFailedListener(this)                .addAPI(LocationServices.API)                .build();locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);@OverrIDepublic voID onConnected(Bundle bundle) {      mLocation = LocationServices.FusedLocationAPI.getLastLocation(mGoogleapiclient);    double lat = mLocation.getLatitude();    double lon = mLocation.getLongitude();}

我在lat和lon变量中没有得到任何东西.

我该如何解决？

解决方法 它没有必要LocationServices.FusedLocationAPI.getLastLocation(mGoogleapiclient);将始终返回最后一个对象.如果它找不到最后一个对象,它将返回null并且您将无法获得位置.在这种情况下,建议使用以下方式请求定位：

LocationServices.FusedLocationAPI.requestLocationUpdates(mGoogleapiclient,mLocationRequest,this);

您还需要实现一些接口和覆盖方法,以通过Google Api获取位置.

按照以下步骤获取位置：

首先,将它放在gradle文件中

compile 'com.Google.androID.gms:play-services:8.4.0'

然后实现必要的接口

public class MainActivity  extends BaseActivitiy implements Googleapiclient.ConnectionCallbacks,Googleapiclient.OnConnectionFailedListener,com.Google.androID.gms.location.LocationListener

声明实例

private Googleapiclient mGoogleapiclient;  private Location mLocation;  private LocationManager locationManager;  private LocationRequest mLocationRequest;

把它放在onCreate()

mGoogleapiclient = new Googleapiclient.Builder(this)                .addConnectionCallbacks(this)                .addOnConnectionFailedListener(this)                .addAPI(LocationServices.API)                .build();        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

最后,重写必要的方法

@OverrIDe    public voID onConnected(Bundle bundle) {        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;        }        mLocation = LocationServices.FusedLocationAPI.getLastLocation(mGoogleapiclient);        if(mLocation == null){            startLocationUpdates();        }        if (mLocation != null) {            double latitude = mLocation.getLatitude();            double longitude = mLocation.getLongitude();        } else {            // Toast.makeText(this,"Location not Detected",Toast.LENGTH_SHORT).show();        }    }    protected voID startLocationUpdates() {        // Create the location request        mLocationRequest = LocationRequest.create()                .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)                .setInterval(UPDATE_INTERVAL)                .setFastestInterval(FASTEST_INTERVAL);        // Request location updates        if (ActivityCompat.checkSelfPermission(this,//                                          int[] grantResults)            // to handle the case where the user grants the permission. See the documentation            // for ActivityCompat#requestPermissions for more details.            return;        }        LocationServices.FusedLocationAPI.requestLocationUpdates(mGoogleapiclient,this);        Log.d("reque","--->>>>");    }    @OverrIDe    public voID onConnectionSuspended(int i) {        Log.i(TAG,"Connection Suspended");        mGoogleapiclient.connect();    }    @OverrIDe    public voID onConnectionFailed(ConnectionResult connectionResult) {        Log.i(TAG,"Connection Failed. Error: " + connectionResult.getErrorCode());    }    @OverrIDe    public voID onStart() {        super.onStart();        mGoogleapiclient.connect();    }    @OverrIDe    public voID onStop() {        super.onStop();        if (mGoogleapiclient.isConnected()) {            mGoogleapiclient.disconnect();        }    }    @OverrIDe    public voID onLocationChanged(Location location) {    }

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