There are several libraries for Android that allow using OSM, displaying OSM-based maps, including at least: * [osmdroid][1] ([Google code][2], similar to Android's MapView) * [Mapsforge][3] ([Google code][4], offline vector rendering) In addition to that, the [Android wiki page][5] has a full list of OSM software running on Android. Android, including not just map viewers, but also routing and editing applications. A lot of that is these are Open Source, so code sharing/reuse would be a possibility. [1]: http://wiki.openstreetmap.org/wiki/Osmdroid [2]: http://code.google.com/p/osmdroid/ [3]: http://wiki.openstreetmap.org/wiki/Mapsforge [4]: http://code.google.com/p/mapsforge/ [5]: http://wiki.openstreetmap.org/wiki/Android

There are several libraries for Android that allow using OSM, including at least: * [osmdroid][1] ([Google code][2], similar to Android's MapView) * [Mapsforge][3] ([Google code][4], offline vector rendering) In addition to that, the [Android wiki page][5] has a full list of OSM software running on Android. A lot of that is Open Source, so code sharing/reuse would be a possibility. [1]: http://wiki.openstreetmap.org/wiki/Osmdroid [2]: http://code.google.com/p/osmdroid/ [3]: http://wiki.openstreetmap.org/wiki/Mapsforge [4]: http://code.google.com/p/mapsforge/ [5]: http://wiki.openstreetmap.org/wiki/Android