Taking Snapshot of Maps - osmdroid/osmdroid GitHub Wiki
Snapshots of maps can be taken using the MapSnapshot object.
The various flags available for configuring are:
-
INCLUDE_FLAG_UPTODATE: Accept only up-to-date tiles (Implicitly means that you may have to wait, and need background downloads) -
INCLUDE_FLAG_EXPIRED: Accept expired tiles -
INCLUDE_FLAG_SCALED: Accept scaled tiles -
INCLUDE_FLAG_NOTFOUND: Accept empty tiles -
INCLUDE_FLAGS_ALL: Include all above flags
Any combo of these flags can be used : Example : INCLUDE_FLAG_UPTODATE + INCLUDE_FLAG_SCALED is a valid flag
MapSnapshotable is a callback interface which gets called when the requested snapshot is ready
Sample 1 : Take a snapshot of a given MapView
final MapSnapshot mapSnapshot = new MapSnapshot(new MapSnapshot.MapSnapshotable() {
@Override
public void callback(final MapSnapshot pMapSnapshot) {
if (pMapSnapshot.getStatus() != MapSnapshot.Status.CANVAS_OK) {
return;
}
final Bitmap bitmap = Bitmap.createBitmap(pMapSnapshot.getBitmap());
// Do something with the bitmap like saving to file
}
}, MapSnapshot.INCLUDE_FLAG_UPTODATE, pMapView);
new Thread(mapSnapshot).start();Sample 2: Taking snapshot given only latitude and longitude without having an explicit MapView
GeoPoint pt = new GeoPoint(latitude,longitude)
Marker marker = new Marker(new MapView(getApplicationContext()));
marker.setPosition(pt);
marker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
List<Overlay> mOverlay = new ArrayList<>();
mOverlay.add(marker);
MapTileProviderBase mapTileProviderBase = new MapTileProviderBasic(getApplicationContext());
// Create a new Projection (https://osmdroid.github.io/osmdroid/javadocAll/org/osmdroid/views/Projection.html)
Projection mProjection = new Projection(18.00, 400, 400, pt, 0, true, true, 0, 0);
final MapSnapshot mapSnapshot = new MapSnapshot(new MapSnapshot.MapSnapshotable() {
@Override
public void callback(final MapSnapshot pMapSnapshot) {
// Save the current snapshot
if (pMapSnapshot.getStatus() != MapSnapshot.Status.CANVAS_OK) {
return;
}
final Bitmap bitmap = Bitmap.createBitmap(pMapSnapshot getBitmap());
// Do something with the bitmap like saving to file
}
}, MapSnapshot.INCLUDE_FLAG_UPTODATE, mapTileProviderBase, mOverlay, mProjection);
new Thread(mapSnapshot).start();