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    <p>The native Google Maps application already has all of the functionality you describe.</p> <ul> <li>Google <a href="http://googleblog.blogspot.com/2011/11/new-frontier-for-google-maps-mapping.html" rel="nofollow noreferrer">recently</a> released indoor mapping. Go to <a href="http://maps.google.com/floorplans" rel="nofollow noreferrer">maps.google.com/floorplans</a> to upload your buildings' floor plans.</li> <li>Use <a href="http://www.google.com/mapmaker" rel="nofollow noreferrer">Google Map Maker</a> to add walking paths to your campus.</li> </ul> <p>Now anyone can use their built-in Maps app to get walking directions between campus buildings. (<a href="http://maps.google.com/maps?saddr=McMicken+Hall,+Cincinnati,+OH&amp;daddr=Turner+Hall,+Cincinnati,+OH&amp;hl=en&amp;sll=41.178654,-86.220703&amp;sspn=7.018878,14.27124&amp;geocode=FfMaVQIdFVf2-ikJ5QoFi7NBiDFOiijIs_lT8A%3BFV4dVQIdh3T2-ik5oJmHjbNBiDHraGKS_BOUUA&amp;oq=turner+hall,+cin&amp;dirflg=w&amp;mra=ls&amp;t=m&amp;z=17" rel="nofollow noreferrer">Example</a> - notice that the route takes you through campus walkways, not along the surrounding roads.)</p> <p>To see indoor maps in action, use the Maps app on your Android to zoom in on an Ikea or take a look at <a href="http://www.youtube.com/watch?v=kT0KMsfD4d8" rel="nofollow noreferrer">this video</a>.</p> <p>If you have an app you'd like to launch the Maps app from, do this:</p> <pre><code>Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse("http://maps.google.com/maps?saddr=START_LOCATION&amp;daddr=DESTINATION_LOCATION&amp;dirflg=w")); if (isAppInstalled("com.google.android.apps.maps")) { intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity"); } startActivity(intent); // helper function to check if Maps is installed private boolean isAppInstalled(String uri) { PackageManager pm = getApplicationContext().getPackageManager(); boolean app_installed = false; try { pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES); app_installed = true; } catch (PackageManager.NameNotFoundException e) { app_installed = false; } return app_installed; } </code></pre> <p>(Code shamelessly stolen from <a href="https://stackoverflow.com/q/6560345/201952">here</a>.)</p>
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