Map view tile size is what defines the
rendering, both in vector and raster maps.
We have examples with raster tile sources in Mapsforge samples
app, e.g.
DownloadLayerViewer.
There a fixed tile size 256px is used, as that is provided by the
tile source (see
here):
this.mapView
.getModel()
.displayModel
.setFixedTileSize(
256);
If you remove that line, then the map view tile size will be
auto-calculated based on device dpi (like in vector maps) and so the
raster tiles would appear bigger (though a bit blurry).