Java 在android studio上使用maps api获取当前位置

我问，如何为android创建一个脚本，用google maps api v2为android获取当前位置。 现在，我的scrpt获取指定cordinate的位置。 我将其发布到我的java文件：

private GoogleMap mMap;

static final LatLng TutorialsPoint = new LatLng(46.493168,11.3306379);
private GoogleMap googleMap;

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

    try {
        if (googleMap == null) {
            googleMap = ((MapFragment) getFragmentManager().
                    findFragmentById(R.id.map)).getMap();
        }
        googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
        Marker TP = googleMap.addMarker(new MarkerOptions().
                position(TutorialsPoint).title("TutorialsPoint"));
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}

在

onCreate（）

方法中，键入以下内容：

SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.mapfragment);
    mapFragment.getMapAsync(this);

---

使您的活动实现

LocationListener

、

onMapReadyCallback

和

GoogleAppClient.ConnectionCallbacks

接口。在该接口的方法中：

onMapReady (from onMapReadyCallbacks):

    public void onMapReady(GoogleMap map) {
        //mapa is your GoogleMap variable
        mapa=map;

    }

这样做，您可以确保您的地图已准备好工作

在onConnected方法（从

GoogleAppClient.ConnectionCallbacks

接口）中，您可以获得您的位置：

@Override
public void onConnected(Bundle bundle) {

    Location lkn=LocationServices.FusedLocationApi.getLastLocation(
            gApiClient);
    if(myLocation==null){
        myLocation=new Location("");
    }
    if(lkn!=null){

        myLocation.setLatitude(lkn.getLatitude());
        myLocation.setLongitude(lkn.getLongitude());
    }
    LocationServices.FusedLocationApi.requestLocationUpdates(
            gApiClient, mLocationRequest, this);
}

最后，在onLocationChanged中（从LocationListener接口）：

因此，每次手机有一个新的位置时，你都会通过这种方式收到它

您还需要实现这两种方法：

//call this method in your onCreate()
protected synchronized void buildGoogleApiClient() {
    //gApiClient is a class variable, type GoogleApiClient
    gApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
                @Override
                public void onConnectionFailed(ConnectionResult connectionResult) {
                    Log.i("Map", "Conection failed");
                }
            })
            .addApi(LocationServices.API)
            .build();
    gApiClient.connect();
    createLocationRequest();
}

protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000);
    mLocationRequest.setFastestInterval(5000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

---

实现

LocationListener

为此，首先你必须确定是否在屏幕上显示谷歌地图视图。然后你可以用记号笔。使用getSupportMapFragment（）而不是getFragmentManager（）。

//call this method in your onCreate()
protected synchronized void buildGoogleApiClient() {
    //gApiClient is a class variable, type GoogleApiClient
    gApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
                @Override
                public void onConnectionFailed(ConnectionResult connectionResult) {
                    Log.i("Map", "Conection failed");
                }
            })
            .addApi(LocationServices.API)
            .build();
    gApiClient.connect();
    createLocationRequest();
}

protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000);
    mLocationRequest.setFastestInterval(5000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}