Android

Nautical navigator is a free offline Android app providing you sea maps from openstreetmap and sea markers from openseamap projects. You can download here:

https://play.google.com/store/apps/details?id=cz.martinkoubek.nautical_navigator

Calling method getWidth(), getHeight() after onCreate return 0 as the view is not yet positioned correctly in layout. One of the easiest approach to get the width and height is postpone call:

To rembember data when view is finished, shared preferences can be used to keep data alive.

1. Place the code onCreate