Question

我尝试了很多不同的解决方案，我也在Google上进行了搜索，但仍未获得所需的解决方案。问题尚未解决。我有ViewPager和一些片段。在第一篇片段中，我想使用Google Map API v2来显示设备的当前位置。如果我使用纬度/经度的当前值并进行缩放，它可以正常工作。什么是了解片段中当前位置（ NOT FragmentActivity或Activity ）当前纬度和经度的最佳方式？我只是想知道Fragment有可能吗？如果有人有同样的问题并解决了，请告诉我！

感谢您的帮助！

下面是我用来设置地图的代码：

fragment.xml之

<RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:id="@+id/map_container">

      <!-- The map fragments will go here -->
</RelativeLayout>

MainFragment.java

public class MainFragment extends Fragment{
      private SupportMapFragment mSupportMapFragment;
      private GoogleMap mGoogleMap;

      @Override
      public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        FragmentManager mFragmentManager = getChildFragmentManager();
        mSupportMapFragment = (SupportMapFragment) mFragmentManager.findFragmentById(R.id.map_container);
        if (mSupportMapFragment == null) {
            mSupportMapFragment = SupportMapFragment.newInstance();
            mFragmentManager.beginTransaction().replace(R.id.map_container, mSupportMapFragment).commit();
        }
    }

    @Override
    public void onResume(){
    if(mGoogleMap==null){
            mGoogleMap = mSupportMapFragment.getMap();
            //Set the marker
            mGoogleMap.addMarker(new MarkerOptions()
                    .position(new LatLng(???))
                    .title("Location")
                    .snippet("Your current location"));

            // Move the camera and zoom it to location
            mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(???), 15));
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        try {
            Field childFragmentManager = Fragment.class.getDeclaredField("mChildFragmentManager");
            childFragmentManager.setAccessible(true);
            childFragmentManager.set(this, null);
        } catch (NoSuchFieldException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }
}

Answer 1

当前位置

。试试这个..

    LocationManager lm;
    Location location;
    Geocoder geo;

    //convert lat, long to address.
    List<Address> addresses;
    lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    //get the last known latitude longitude from network
    location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
    //create an instance of geocoder
    geo = new Geocoder(this.getApplicationContext(), Locale.getDefault());
    try
    {
        addresses = geo.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
        if(addresses.get(0).getPostalCode() != null)
        {
            //You can get Lat, Long or Zip code
        }
    }
    catch (Exception e)
    {

    }

显示设备当前位置Google Map（Fragment）

1 个答案: