代码之家 › 专栏 › 技术社区 › user7241242

移动地图包为地图返回null

arcgis-android-api arcgis dictionary

user7241242 · 技术社区 · 7 年前

我下载了 Arcgis 样品 mmpk 甚至我自己做了一个mmpk。
在这两个文件中,我都有一个映射(由调试检查),但当我尝试加载映射时(带有代码指南页)返回用于地图。
很高兴地说,我可以在地图视图中显示在线地图,android studio不会显示任何警告或错误。

    import static n.k.masoud.sbmap.R.id.mapView;


    public class ActivityMain extends AppCompatActivity {
        private MapView mMapView;
        private ArcGISMap map;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            mMapView = (MapView) findViewById(mapView);

主站点的代码和文件

            try {File mmpkFile = new File(Environment.getExternalStorageDirectory(),"devlabs-package.mmpk");
            String mmpkPath = mmpkFile.getAbsolutePath();
            final MobileMapPackage mobileMapPackage=new MobileMapPackage(mmpkPath);


  mobileMapPackage.addDoneLoadingListener(new Runnable() {
       @Override
         public void run() {

如果得到

             if (mobileMapPackage.getLoadStatus() == LoadStatus.LOADED) {
               showMessage(String.format("Number of maps = %d", mobileMapPackage.getMaps().size()));
map = mobileMapPackage.getMaps().get(0);
            } else {
               dealWithLoadFailure();
              }
           }
     });
       mobileMapPackage.loadAsync();
   }
    catch (Exception err){
      Log.e("TAG", "onCreate: "+err);
   }

          map.addDoneLoadingListener(new Runnable() {
              @Override
              public void run() {
                  if (map.getLoadStatus() == LoadStatus.LOADED) {
                     Log.e("TAG", "run: map loaded ok" );
                       // Once map is loaded, can check its properties and content
                    if (map.getBookmarks().size() > 0) {
}
                } else {
dealWithLoadFailure();
                 }
              }
            });
           map.loadAsync();

正如我所说,下面的部分工作正常

 //        for online maps
    //        ArcGISMap map = new ArcGISMap(Basemap.Type.TOPOGRAPHIC, 29.453826, 60.852134,12);

            mMapView.setMap(map);
mMapView.addLayerViewStateChangedListener(new LayerViewStateChangedListener() {
                @Override
                public void layerViewStateChanged(LayerViewStateChangedEvent layerViewStateChangedEvent) {
                    // Each layer may have more than one layer view state.
                    StringBuilder layerStatuses = new StringBuilder();
                    for (LayerViewStatus status : layerViewStateChangedEvent.getLayerViewStatus()) {
                        if (layerStatuses.length() > 0) {
                            layerStatuses.append(",");
                        } layerStatuses.append(status.name());
                    }
                    showMessage(String.format("Layer '%s' status=%s", layerViewStateChangedEvent.getLayer().getName(), layerStatuses.toString()));
                } });



        }
        @Override
        protected void onPause(){
            mMapView.pause();
            super.onPause();
        }

        @Override
        protected void onResume(){
            super.onResume();
            mMapView.resume();
        }

    }

2 回复 | 直到 7 年前

falldownhill 7 年前

如果线路

if (mobileMapPackage.getLoadStatus() == LoadStatus.LOADED)

返回false,则移动地图包未加载,并且不会包含任何地图。

mobileMapPackage.getLoadError()

看看是什么。它应该告诉您导致负载故障的错误是什么。

user7241242 user7241242 7 年前

我的一个朋友尝试了这种方法,但没有得到任何结果,就像我一样。
所以他把官方的指南代码改成了这个,并得到了很好的回应。

 private void setupMobileMap() {
    if (mMapView != null) {
        File mmpkFile = new File(Environment.getExternalStorageDirectory(), "devlabs-package.mmpk");
        final MobileMapPackage mapPackage = new MobileMapPackage(mmpkFile.getAbsolutePath());
        mapPackage.addDoneLoadingListener(new Runnable() {
            @Override
            public void run() {
                // Verify the file loaded and there is at least one map
                if (mapPackage.getLoadStatus() == LoadStatus.LOADED && mapPackage.getMaps().size() > 0) {
                     mMapView.setMap(mapPackage.getMaps().get(0));
                } else {
                    // Error if the mobile map package fails to load or there are no maps included in the package
                    //setupMap();
                    //Log for Error
                }
            }
        });
        mapPackage.loadAsync();
    }
}