为什么 osmdroid 不能在离线模式下工作（多个问题）？

Question

我正在开发 OSMdroid 库，想把它变成 offline 所以我使用了这个代码

 mMapView.setUseDataConnection(false);

但在这种情况下，它甚至不会显示除图表页面以外的地图。但是当我将 boolean 更改为 true 时，它再次开始工作。

So how do i make it work completely offline?

我也在尝试获取 poi 所以我有以下代码

 geoPoint= new GeoPoint(37.439974,-119.003906);
 double north = 84;
    double east = -180;
    double south = -84;
    double west = 180;
    boundingBoxE6 = new BoundingBoxE6(north, east, south, west);
    mMapView.setScrollableAreaLimit(boundingBoxE6);
    mMapView.setMultiTouchControls(true);
    Marker marker= new Marker(mMapView,mResourceProxy);
    marker.setPosition(geoPoint);
    mMapView.getOverlays().add(marker);
    poiMarkers = new FolderOverlay(getActivity());
    new connection().execute();
    mMapView.invalidate();


public class connection extends AsyncTask{

    @Override
    protected Object doInBackground(Object[] objects) {
        NominatimPOIProvider poiProvider = new NominatimPOIProvider();
        pois=poiProvider.getPOICloseTo(geoPoint,"atm",50,1000);
        return pois;
    }

    @Override
    protected void onPostExecute(Object o) {
        super.onPostExecute(o);
        mMapView.getOverlays().add(poiMarkers);
        Drawable poiIcon = getResources().getDrawable(R.drawable.marker_poi_default);
        if (o != null) {
            for (POI poi : pois) {
                Marker poiMarker = new Marker(mMapView);
                poiMarker.setTitle(poi.mType);
                poiMarker.setSnippet(poi.mDescription);
                poiMarker.setPosition(poi.mLocation);
                poiMarker.setIcon(poiIcon);
                poiMarkers.add(poiMarker);
            }
        }else{
            Toast.makeText(getActivity(),"null",Toast.LENGTH_SHORT).show();
        }
    }
}

But instead of getting the poi on the given geopint i get it somewhere else and everytime i mean whatever the code i change i don't get the poi in any other places other than that

http://nominatim.openstreetmap.org/search?format=json&q=[atm]&limit=50&bounded=1&viewbox=-1119.003906,1037.439974,880.996094,-962.560026

Is it possible to access poi in offline mode?

Answer 1

至于显示的离线图块，你确定你有离线地图图块 .ZIP-file 存储在 /mnt/sdcard/osmdroid/ 中吗（或者无论你设备的 SD 卡的路径是什么，它必须在此文件夹位于名为 osmdroid)?

的子目录中

可以在这里找到对我有帮助的好教程：http://www.haakseth.com/?p=30

如果没有互联网连接可从中检索图块，OSMdroid TileSource 将自动查找此 .ZIP-file。在 OpenStreetMapTileProviderConstants class 中有这段代码：

/** Base path for osmdroid files. Zip files are in this folder. */
public static final File OSMDROID_PATH = new File(Environment.getExternalStorageDirectory(),
        "osmdroid");

所以如您所见，您只需要在 SD 卡文件夹中有 osmdroid 目录，一切都应该正常。

如果您还没有地图图块 .ZIP，请查看 Mobile Atlas Creator 以创建它。

为什么 osmdroid 不能在离线模式下工作（多个问题）？

Why osmdroid not working in offline mode (multiple questions)?

java

android

openstreetmap

osmdroid