google-maps - 为什么 Geocoder.getFromLocationName 返回 null？

Question

我正在使用谷歌地图 V2。我想用来geocoder查找位置，但getFromLocationName()它返回空值，我找不到原因。只需查看我的代码并建议我，我该怎么办？

EditText sLocation = (EditText) v.findViewById(R.id.editText1);
                String location = sLocation.getText().toString();

                List<android.location.Address> addressList= null;

                if (location != null || !location.equals("")) {
                    Geocoder geocoder = new Geocoder(getActivity().getApplicationContext());
                    try {
                        addressList = geocoder.getFromLocationName(location, 1);

                    } catch (IOException e) {
                        e.printStackTrace();
                    }


                    android.location.Address address = addressList.get(0);
                    LatLng latlng = new LatLng(address.getLatitude(), address.getLatitude());
                    gMap.addMarker(new MarkerOptions().position(latlng).title("Marker"));
                    gMap.animateCamera(CameraUpdateFactory.newLatLng(latlng));

                }

Answer 1

我得到空值形式getFromLocationName()。因为，我addressList从位置获得“空”值。当我声明我EditText的 inonClick方法时，然后getFromLocationName()返回正确的值，如下所示：

sButton =(Button) v.findViewById(R.id.generalId);
sButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                EditText sLocation = (EditText)getActivity().findViewById(R.id.editText1);
                location = sLocation.getText().toString();

                List<android.location.Address> addressList= null;

                if (location != null || location.length()>0) {
                    Geocoder geocoder = new Geocoder(getActivity().getApplicationContext());
                    try {
                        addressList = geocoder.getFromLocationName(location, 1);

                    } catch (IOException e) {

                            e.printStackTrace();
                    }

                    android.location.Address address = addressList.get(0);
                    String locality = address.getLocality();
                    Toast.makeText(getActivity(), locality, Toast.LENGTH_LONG).show();
                    double latitude = address.getLatitude();
                    double longitude = address.getLongitude();
                    LatLng latLng = new LatLng(latitude, longitude);
                    gMap.addMarker(new MarkerOptions().position(latLng).title("Marker"));
                    gMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));

                }

            }
        });