44

使用

mMap.setMyLocationEnabled(true)

可以设置 myLocation 层启用。
但问题是当用户点击按钮时如何获取 myLocation ?我想得到经度和纬度。

4

13 回答 13

59

Google Maps API 位置现在可以工作,甚至有监听器,您可以使用它来实现,例如:

private GoogleMap.OnMyLocationChangeListener myLocationChangeListener = new GoogleMap.OnMyLocationChangeListener() {
    @Override
    public void onMyLocationChange(Location location) {
        LatLng loc = new LatLng(location.getLatitude(), location.getLongitude());
        mMarker = mMap.addMarker(new MarkerOptions().position(loc));
        if(mMap != null){
            mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(loc, 16.0f));
        }
    }
};

然后为地图设置监听器:

mMap.setOnMyLocationChangeListener(myLocationChangeListener);

这将在地图首次找到该位置时被调用。

根本不需要 LocationService 或 LocationManager。

OnMyLocationChangeListener接口已弃用。请改用 com.google.android.gms.location.FusedLocationProviderApi。FusedLocationProviderApi 提供改进的位置查找和电源使用,并由“我的位置”蓝点使用。请参阅示例应用程序文件夹中的 MyLocationDemoActivity 以获取示例代码或位置开发人员指南。

于 2014-05-29T22:17:36.677 回答
31

目前 GoogleMap.getMyLocation() 在任何情况下总是返回 null 。

据我所知,目前有两个针对 Google 的错误报告,Issue 40932Issue 4644

像前面提到的那样实现 LocationListener 是不正确的,因为 LocationListener 将与您尝试使用的新 API 中的 LocationOverlay 不同步。

按照之前由 Pramod J George 链接的 Vogella 网站上的教程,将为您提供有关旧版 Google Maps API 的说明。

因此,对于没有为您提供通过这种方式检索您的位置的方法,我深表歉意。目前,locationListener 可能是唯一的方法,但我确信 Google 正在努力解决新 API 中的问题。

也很抱歉没有发布更多链接,StackOverlow 认为我是垃圾邮件,因为我没有代表。

---- 2013 年 2 月 4 日更新 ----

谷歌表示,该问题将在下次更新 Google Maps API 时通过 Issue 4644修复。我不确定什么时候会更新,但一旦更新,我会再次编辑这篇文章。

---- 2013年4月10日更新----

谷歌表示该问题已通过 Issue 4644得到修复。它现在应该可以工作了。

于 2012-12-12T00:01:44.307 回答
19

尝试这个

LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = service.getBestProvider(criteria, false);
Location location = service.getLastKnownLocation(provider);
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());
于 2013-01-24T03:16:30.730 回答
3

确保您已打开设备上的定位服务。否则,您将不会获得任何与位置相关的信息。

这对我有用,

    map = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
    map.setMyLocationEnabled(true);
    GoogleMap.OnMyLocationChangeListener myLocationChangeListener = new GoogleMap.OnMyLocationChangeListener() {
        @Override
        public void onMyLocationChange (Location location) {
           LatLng loc = new LatLng (location.getLatitude(), location.getLongitude());
           map.animateCamera(CameraUpdateFactory.newLatLngZoom(loc, 16.0f));
        }
    };
    map.setOnMyLocationChangeListener(myLocationChangeListener);

}

于 2014-11-28T16:23:57.420 回答
2

要获取用户单击按钮时的位置,请在 onClick- 中调用此方法

void getCurrentLocation() {
    Location myLocation  = mMap.getMyLocation();
    if(myLocation!=null)
    {
        double dLatitude = myLocation.getLatitude();
        double dLongitude = myLocation.getLongitude();
        Log.i("APPLICATION"," : "+dLatitude);
        Log.i("APPLICATION"," : "+dLongitude);
        mMap.addMarker(new MarkerOptions().position(
                new LatLng(dLatitude, dLongitude)).title("My Location").icon(BitmapDescriptorFactory.fromBitmap(Utils.getBitmap("pointer_icon.png"))));
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(dLatitude, dLongitude), 8));

    }
    else
    {
        Toast.makeText(this, "Unable to fetch the current location", Toast.LENGTH_SHORT).show();
    }

}

还要确保

setMyLocationEnabled

设置为true

试试看这是否有效...

于 2013-03-08T11:06:30.503 回答
1

我刚刚发现此代码片段简单实用,请尝试:

public class MainActivity extends ActionBarActivity implements
    ConnectionCallbacks, OnConnectionFailedListener {
...
@Override
public void onConnected(Bundle connectionHint) {
    mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
            mGoogleApiClient);
    if (mLastLocation != null) {
        mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
        mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
    }
}}

这是教程的链接:获取最后一个已知位置

于 2014-12-23T10:09:40.763 回答
1

你试过GoogleMap.getMyLocation()吗?

于 2012-12-07T06:33:24.423 回答
1

尝试这个

if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
                == PackageManager.PERMISSION_GRANTED) {
    mMap.setMyLocationEnabled(true);
} else {
    // Show rationale and request permission.
}
于 2016-06-06T17:54:00.320 回答
0

尝试这个

public class MyLocationListener implements LocationListener
{

 @Override

public void onLocationChanged(Location loc)
{

loc.getLatitude();

loc.getLongitude();

String Text = “My current location is: ” +

“Latitud = ” + loc.getLatitude() +

“Longitud = ” + loc.getLongitude();

Toast.makeText( getApplicationContext(),Text,   Toast.LENGTH_SHORT).show();



tvlat.setText(“”+loc.getLatitude());

tvlong.setText(“”+loc.getLongitude());

this.gpsCurrentLocation();

}
于 2012-12-07T07:03:53.573 回答
0

只有一个条件,我测试它不为空,如果您允许用户有足够的时间触摸“获取我的位置”图层按钮,那么它将不会获得空值。

于 2015-02-17T21:52:01.123 回答
0

它将给出当前位置。

mMap.setMyLocationEnabled(true);
Location userLocation = mMap.getMyLocation();
        LatLng myLocation = null;
        if (userLocation != null) {
            myLocation = new LatLng(userLocation.getLatitude(),
                    userLocation.getLongitude());
            mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(myLocation,
                    mMap.getMaxZoomLevel()-5));
于 2014-09-30T14:11:55.270 回答
0

接受的答案有效,但现在不推荐使用一些使用的方法,所以我认为最好用更新的方法回答这个问题。

这是答案完全来自谷歌开发者指南

所以这里是一步一步的指南:

  1. 在您的地图活动中实现所有这些

    MapActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.OnConnectionFailedListener, GoogleApiClient.ConnectionCallbacks

  2. 在你的onCreate

    private GoogleMap mMap;
    private Context context;
    private TextView txtStartPoint,txtEndPoint;
    private GoogleApiClient mGoogleApiClient;
    private Location mLastKnownLocation;
    private LatLng mDefaultLocation;
    private CameraPosition mCameraPosition;
    private boolean mLocationPermissionGranted;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    context = this;
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this /* FragmentActivity */,
                    this /* OnConnectionFailedListener */)
            .addConnectionCallbacks(this)
            .addApi(LocationServices.API)
            .addApi(Places.GEO_DATA_API)
            .addApi(Places.PLACE_DETECTION_API)
            .build();
    mGoogleApiClient.connect();
    }
    
  3. 在你的onConnected

    SupportMapFragment mapFragment = (SupportMapFragment)     getSupportFragmentManager()
            .findFragmentById(map);
    mapFragment.getMapAsync(this);
    
  4. 在你的onMapReady

    @Override
    public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    
    // Do other setup activities here too, as described elsewhere in this tutorial.
    
    // Turn on the My Location layer and the related control on the map.
    updateLocationUI();
    
    // Get the current location of the device and set the position of the map.
    getDeviceLocation();
    }
    
  5. 这两个是方法onMapReady

    private void updateLocationUI() {
      if (mMap == null) {
        return;
    }
    
    if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
            android.Manifest.permission.ACCESS_FINE_LOCATION)
            == PackageManager.PERMISSION_GRANTED) {
        mLocationPermissionGranted = true;
    }
    
    if (mLocationPermissionGranted) {
        mMap.setMyLocationEnabled(true);
        mMap.getUiSettings().setMyLocationButtonEnabled(true);
    } else {
        mMap.setMyLocationEnabled(false);
        mMap.getUiSettings().setMyLocationButtonEnabled(false);
        mLastKnownLocation = null;
    }
    }
    
    private void getDeviceLocation() {
    if (ContextCompat.checkSelfPermission(this.getApplicationContext(),
            android.Manifest.permission.ACCESS_FINE_LOCATION)
            == PackageManager.PERMISSION_GRANTED) {
        mLocationPermissionGranted = true;
    }
    
    if (mLocationPermissionGranted) {
        mLastKnownLocation = LocationServices.FusedLocationApi
                .getLastLocation(mGoogleApiClient);
    }
    
    // Set the map's camera position to the current location of the device.
    float DEFAULT_ZOOM = 15;
    if (mCameraPosition != null) {
        mMap.moveCamera(CameraUpdateFactory.newCameraPosition(mCameraPosition));
    } else if (mLastKnownLocation != null) {
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(
                new LatLng(mLastKnownLocation.getLatitude(),
                        mLastKnownLocation.getLongitude()), DEFAULT_ZOOM));
    } else {
        Log.d("pouya", "Current location is null. Using defaults.");
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(mDefaultLocation, DEFAULT_ZOOM));
        mMap.getUiSettings().setMyLocationButtonEnabled(false);
    }
    }
    

这是非常快速、流畅和有效的。希望这可以帮助

于 2017-04-09T08:26:43.810 回答
0

我宁愿使用FusedLocationApi因为OnMyLocationChangeListener已弃用。

首先声明这 3 个变量:

private LocationRequest  mLocationRequest;
private GoogleApiClient  mGoogleApiClient;
private LocationListener mLocationListener;

定义方法:

private void initGoogleApiClient(Context context)
{
    mGoogleApiClient = new GoogleApiClient.Builder(context).addApi(LocationServices.API).addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks()
    {
        @Override
        public void onConnected(Bundle bundle)
        {
            mLocationRequest = LocationRequest.create();
            mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
            mLocationRequest.setInterval(1000);

            setLocationListener();
        }

        @Override
        public void onConnectionSuspended(int i)
        {
            Log.i("LOG_TAG", "onConnectionSuspended");
        }
    }).build();

    if (mGoogleApiClient != null)
        mGoogleApiClient.connect();

}

private void setLocationListener()
{
    mLocationListener = new LocationListener()
    {
        @Override
        public void onLocationChanged(Location location)
        {
            String lat = String.valueOf(location.getLatitude());
            String lon = String.valueOf(location.getLongitude());
            Log.i("LOG_TAG", "Latitude = " + lat + " Longitude = " + lon);
        }
    };

    LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, mLocationListener);
}

private void removeLocationListener()
{
    LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, mLocationListener);
}
  • initGoogleApiClient()用于初始化GoogleApiClient对象
  • setLocationListener()用于设置位置变化监听器
  • removeLocationListener()用于移除监听器

调用initGoogleApiClient方法开始代码工作:) 不要忘记在mLocationListener最后删除监听器()以避免内存泄漏问题。

于 2017-07-04T14:14:11.093 回答