using osmdroid without external storage permission

OsmSample.java

// activity code goes here
// ...

/*
* To avoid the normally required permission ACCESS_EXTERNAL_STORAGE the osmdroid library
* offers a way to change the base path and the caching path to any other directory.
* We change these directories before initializing our MapView object, so osmdroid
* will NOT need the permission called above.
*
* Note that directories are also objects of type File in Java!
*/
Configuration.getInstance().setOsmdroidBasePath(new File(this.getFilesDir() + "/osmdroid/base"));
Configuration.getInstance().setOsmdroidTileCache(new File(this.getFilesDir() + "/osmdroid/cache"));

this.mapView = this.findViewById(R.id.map_view);

// ...