Help with downloading a map for offline use within an app?

CoraColeman — Sat, 11 Dec 2021 19:10:27 GMT

Hello, here is what my code in my onCreate method looks like now (I am following the code found on the Create an offline map guide page). I am using a button to begin the downloading process...I am confused because I do not find that the map is downloaded in the Downloads folder -- this code doesn't do anything but display my portal item:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_offline);

    // inflate MapView from layout
    aMapView = (MapView) findViewById(R.id.mapView);

    // get the portal url for ArcGIS Online
    aPortal = new Portal(getResources().getString(R.string.portal_url));
    // get the pre-defined portal id and portal url
    aPortalItem = new PortalItem(aPortal, getResources().getString(R.string.webmap_glacier_national_park_id));
    // create a map from a PortalItem
    map = new ArcGISMap(aPortalItem);
    // set the map to be displayed in this view
    aMapView.setMap(map);
    Log.d("MAP SET", "we have set our map!");

final Button startdownload = (Button) findViewById(R.id.startdownload);
startdownload.setOnClickListener(v -> {   // create an offline map task
        OfflineMapTask offlineMapTask = new OfflineMapTask(map);

        //get all of the preplanned map areas in the web map
        ListenableFuture<List<PreplannedMapArea>> mapAreasFuture = offlineMapTask.getPreplannedMapAreasAsync();
        mapAreasFuture.addDoneListener(() -> {
            try {
                // get the list of areas
                List<PreplannedMapArea> mapAreas = mapAreasFuture.get();

                // loop through the map areas
                for (PreplannedMapArea mapArea : mapAreas) {
                    // load each map area
                    mapArea.loadAsync();

                    // create the job
                    DownloadPreplannedOfflineMapJob downloadJob =
                            offlineMapTask.downloadPreplannedOfflineMap(mapArea, Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString());

                    //start the job
                    downloadJob.start();

                    // listen for job complete
                    downloadJob.addJobDoneListener(() -> {
                        // get the download result
                        DownloadPreplannedOfflineMapResult downloadResult = downloadJob.getResult();

                        // check for errors
                        if (downloadResult.hasErrors()) {
                            // code here to examine errors:
                            Map<Layer, ArcGISRuntimeException> layerErrors = downloadResult.getLayerErrors();
                            Map<FeatureTable, ArcGISRuntimeException> tableErrors = downloadResult.getTableErrors();

                        } else {
                            // no errors so use the map straight away
                            map = downloadResult.getOfflineMap();

                        }
                    });

                    mapArea.addDoneLoadingListener(() -> {
                        // get the map area geometry so the is can used to display a graphic on the map
                        Geometry areaGeometry = mapArea.getAreaOfInterest();

                        // get the area title so it can be used in a UI component
                        String areaTitle = mapArea.getPortalItem().getTitle();

                        // UI code for showing map areas goes here:
                    });
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (ExecutionException e) {
                e.printStackTrace();
            }
        });
    });
}

Re: Help with downloading a map for offline use within an app?

AnastasiiaChechulina — Sat, 11 Dec 2021 19:10:30 GMT

try to change

map = downloadResult.getOfflineMap()

aMapView.setMap(downloadResult.getOfflineMap())

and you have to wait some minutes for area to be downloaded

topic Help with downloading a map for offline use within an app? in ArcGIS Runtime SDK for Android Questions

Help with downloading a map for offline use within an app?

Re: Help with downloading a map for offline use within an app?