Question

我已将反向地理编码添加到我的地图并将地图设置为可点击。一切都正常，但是当我点击地图时地址没有显示在标记上方。

我的latLan是一个数组，但这是允许我使用变量的唯一方法。我认为问题出在这个区域，但不能把手放在上面。

        @Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;
    mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); // changes view to hybrid
    mMap.setMyLocationEnabled(true); // shows location on map

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // uses GPS only to get location

    double currentLatitude = location.getLatitude();
    double currentLongitude = location.getLongitude();

    final LatLng[] latLng = {(new LatLng(currentLatitude, currentLongitude))};

    mMap.animateCamera(
            CameraUpdateFactory.newLatLngZoom(latLng[0], 18)); // This will zoom camera to updated lat and long without constant updates

    mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {// Setting a click event handler for the map


        @Override
        public void onMapClick(LatLng arg0) {
            Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // uses GPS only to get location
            double currentLatitude = location.getLatitude();
            double currentLongitude = location.getLongitude();

            //LatLng latLng;

            // Getting the Latitude and Longitude of the touched location
            latLng[0] = arg0;

            // Clears the previously touched position
            mMap.clear();

            // Animating to the touched position
            mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng[0]));

            // Creating a marker
            markerOptions = new MarkerOptions();

            // Setting the position for the marker
            markerOptions.position(latLng[0]);

            // Placing a marker on the touched position
            mMap.addMarker(markerOptions);

            // Adding Marker on the touched location with address
            new ReverseGeocodingTask(getBaseContext()).execute(latLng[0]);


        }
    });
    //new ReverseGeocodingTask(getBaseContext()).execute(latLng);
}

private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String> {
    Context mContext;

    public ReverseGeocodingTask(Context context) {
        super();
        mContext = context;
    }

    @Override
    protected String doInBackground(LatLng... params) {
        Geocoder geocoder = new Geocoder(mContext);
        double latitude = params[0].latitude;
        double longitude = params[0].longitude;

        List<android.location.Address> addresses = null;
        String addressText = "";

        try {
            addresses = geocoder.getFromLocation(latitude, longitude, 1);
        } catch (IOException e) {
            e.printStackTrace();
        }
        if (addresses != null && addresses.size() > 0) {
            android.location.Address address = addresses.get(0);
            addressText = String.format("%s, %s, %s", address.getMaxAddressLineIndex() > 0 ?
                    address.getAddressLine(0) : "", address.getLocality(), address.getCountryName());
        }
        return addressText;

    }

    @Override
    protected void onPostExecute(String addressText) {

    markerOptions.title(addressText);
    mMap.addMarker(markerOptions);
    }
}

}

Answer 1

测试了您的代码，发现可能的错误原因。

//在触摸位置放置标记

mMap.addMarker(markerOptions);

在执行ReverseGeocodingTask（）之前实现addMarker()并在addMarker()中再次调用onPostExecute()。您可以尝试添加足够大的自定义标记图像，以使地址和覆盖标记可见。

Customize标记图片

您可以使用自定义标记图像（通常称为图标）替换默认标记图像。自定义图标始终设置为BitmapDescriptor，并使用BitmapDescriptorFactory类中的四种方法之一进行定义。

自定义图片代码：

private static final LatLng MELBOURNE = new LatLng(-37.813, 144.962);
private Marker melbourne = mMap.addMarker(new MarkerOptions()
.position(MELBOURNE)
.title("Melbourne")
.snippet("Population: 4,137,400")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow)));

您可以在mMap.addMarker(markerOptions);之前移除第一个new ReverseGeocodingTask(getBaseContext()).execute(latLng[0]);，然后您的应用将按原样运行。

Answer 2

使用此代码可能有助于获取地址

if（addresses！= null＆amp;＆amp; addresses.size（）＆gt; 0）{ 地址address = addresses.get（0）; String addressLine = address.getAddressLine（0）+ address.getAddressLine（1）+ address.getAddressLine（2）+ address.getAddressLine（3）; }

地图上没有地址点击Android Google地图

2 个答案: