안드로이드를 공부하는 학생입니다.

다음 맵 api를 사용하여 판교역 주변 카페를 보여주는 예제를 하고 있습니다.

와이파이나 LTE가 잡힐 때 는 잘 작동합니다.

하지만 네트워크가 안 잡힌 상황이나 네트워크를 끈 상황에서 어플을 실행하면 종료되었다는 메세지와 함께 강제 종료됩니다.

네트워크가 안될 시에 다른 액티비티를 보여주거나 하고 싶은 데 어떻게 해야하나요? 예를 들어 크롬으로 인터넷 할 때 네트워크 연결이 안될 시에도 어플이 꺼지는 게 아니라 네트워크 확인하라는 화면을 보여주는 것처럼 말입니다.

코드는 다음과 같습니다.

public class TabFragment3 extends Fragment implements MapView.MapViewEventListener {

    private static final String LOG_TAG = "SearchDemoActivity";

    private MapView mMapView;
    private HashMap<Integer, Item> mTagItemMap = new HashMap<Integer, Item>();

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        ViewGroup rootView = (ViewGroup)inflater.inflate(R.layout.tab_fragment_3, container, false);


        mMapView = (MapView)rootView.findViewById(R.id.map_view);
        mMapView.setDaumMapApiKey(MapApiConst.DAUM_MAPS_ANDROID_APP_API_KEY);
        mMapView.setMapViewEventListener(this);
        // mMapView.setCalloutBalloonAdapter(new CustomCalloutBalloonAdapter());



        return rootView;
    }


   /* class CustomCalloutBalloonAdapter implements CalloutBalloonAdapter {

        private final View mCalloutBalloon;

        public CustomCalloutBalloonAdapter() {
            mCalloutBalloon = getLayoutInflater().inflate(R.layout.custom_callout_balloon, null);
        }

        @Override
        public View getCalloutBalloon(MapPOIItem poiItem) {
            if (poiItem == null) return null;
            Item item = mTagItemMap.get(poiItem.getTag());
            if (item == null) return null;
            ImageView imageViewBadge = (ImageView) mCalloutBalloon.findViewById(R.id.badge);
            TextView textViewTitle = (TextView) mCalloutBalloon.findViewById(R.id.title);
            textViewTitle.setText(item.title);
            TextView textViewDesc = (TextView) mCalloutBalloon.findViewById(R.id.desc);
            textViewDesc.setText(item.address);
            imageViewBadge.setImageDrawable(createDrawableFromUrl(item.imageUrl));
            return mCalloutBalloon;
        }

        @Override
        public View getPressedCalloutBalloon(MapPOIItem poiItem) {
            return null;
        }

    }*/

    public void onMapViewInitialized(MapView mapView) {
        Log.i(LOG_TAG, "MapView had loaded. Now, MapView APIs could be called safely");

        mMapView.setMapCenterPointAndZoomLevel(MapPoint.mapPointWithGeoCoord(37.452288655557076, 127.13049478628298), 2, true);

        Searcher searcher = new Searcher();
        String query = "판교역 카페";
        double latitude = 37.452288655557076;
        double longitude = 127.13049478628298;
        int radius = 2500; // 중심 좌표부터의 반경거리. 특정 지역을 중심으로 검색하려고 할 경우 사용. meter 단위 (0 ~ 10000)
        int page = 1;
        String apikey = MapApiConst.DAUM_MAPS_ANDROID_APP_API_KEY;

        searcher.searchKeyword(getActivity().getApplicationContext(), query, latitude, longitude, radius, page, apikey, new OnFinishSearchListener() {
            @Override
            public void onSuccess(final List<Item> itemList) {
                showResult(itemList);
            }

            @Override
            public void onFail() {
                showToast("API_KEY의 제한 트래픽이 초과되었습니다.");
            }
        });
    }

    private void showToast(final String text) {
        Toast.makeText(getActivity().getApplicationContext(), text, Toast.LENGTH_SHORT).show();

    }

    private void showResult(List<Item> itemList) {
        MapPointBounds mapPointBounds = new MapPointBounds();

        for (int i = 0; i < itemList.size(); i++) {
            Item item = itemList.get(i);

            MapPOIItem poiItem = new MapPOIItem();
            poiItem.setItemName(item.title);
            poiItem.setTag(i);
            MapPoint mapPoint = MapPoint.mapPointWithGeoCoord(item.latitude, item.longitude);
            poiItem.setMapPoint(mapPoint);
            mapPointBounds.add(mapPoint);
            poiItem.setMarkerType(MapPOIItem.MarkerType.CustomImage);
            poiItem.setCustomImageResourceId(R.drawable.map_pin_blue);
            poiItem.setSelectedMarkerType(MapPOIItem.MarkerType.CustomImage);
            poiItem.setCustomSelectedImageResourceId(R.drawable.map_pin_red);
            poiItem.setCustomImageAutoscale(false);
            poiItem.setCustomImageAnchor(0.5f,1.0f);

            mMapView.addPOIItem(poiItem);
            mTagItemMap.put(poiItem.getTag(), item);
        }

        mMapView.moveCamera(CameraUpdateFactory.newMapPointBounds(mapPointBounds));

        MapPOIItem[] poiItems = mMapView.getPOIItems();
        if (poiItems.length > 0) {
            mMapView.selectPOIItem(poiItems[0], false);
        }
    }

    private Drawable createDrawableFromUrl(String url) {
        try {
            InputStream is = (InputStream) this.fetch(url);
            Drawable d = Drawable.createFromStream(is, "src");
            return d;
        } catch (MalformedURLException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    private Object fetch(String address) throws MalformedURLException,IOException {
        URL url = new URL(address);
        Object content = url.getContent();
        return content;
    }



    @Override
    public void onMapViewCenterPointMoved(MapView mapView, MapPoint mapCenterPoint) {
    }

    @Override
    public void onMapViewDoubleTapped(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewLongPressed(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewSingleTapped(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewDragStarted(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewDragEnded(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewMoveFinished(MapView mapView, MapPoint mapPoint) {
    }

    @Override
    public void onMapViewZoomLevelChanged(MapView mapView, int zoomLevel) {
    }

}

에러는 다음과 같습니다.