I am trying to snapshot the Google Map image AFTER I set the map to the bounds of the Polyline. I have used separate code samples found on StackExchange to do both the moveToBounds() and Snapshot which work fine individually, but when run in sequence the Snapshot is of the map image BEFORE the map was updated. I assume I need to insert a OnCameraChangeListener but I cannot make it work. Do I need to somehow nest Callbacks? Please advise.
public void mapCapture() {
moveToBounds(gpsTrackingPolyline);
mMap.snapshot(new GoogleMap.SnapshotReadyCallback() {
public void onSnapshotReady(Bitmap bitmap) {
// Write image to disk
try {
File bmpFile = new File(getApplicationContext().getExternalFilesDir(null), DEFAULT_BMP_FILENAME);
FileOutputStream out = new FileOutputStream(bmpFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private void moveToBounds(Polyline p)
{
LatLngBounds.Builder builder = new LatLngBounds.Builder();
List<LatLng> arr = p.getPoints();
for(int i = 0; i < arr.size();i++){
builder.include(arr.get(i));
}
LatLngBounds bounds = builder.build();
int padding = 40; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
mMap.animateCamera(cu);
}
Don't know if you have found solution or if you still need it. But still here it goes. Yes you need a callback which will let you know when map has finished animation. Do something like this:
mMap.animateCamera(cu, new GoogleMap.CancelableCallback() {
@Override
public void onFinish() {
//your code related to snapshot
mMap.snapshot(new GoogleMap.SnapshotReadyCallback() {
public void onSnapshotReady(Bitmap bitmap) {
// Write image to disk
//rest of your code
});
}
@Override
public void onCancel() {
// TODO Auto-generated method stub
}
});
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