File managers usually have two options for file opening:
"Open With..." that already works
"Send to..." where uMath is not available for selection
Allow to select uMath in "Send to..." option as well. To do it, add additional intent-filter in the AndroidManifest.xml and process new intent of type android.intent.action.SEND.
Tested with GhostCommander and Amaze file manager both installed from F-Droid
File managers usually have two options for file opening:
Allow to select uMath in "Send to..." option as well. To do it, add additional intent-filter in the AndroidManifest.xml and process new intent of type android.intent.action.SEND.
Tested with GhostCommander and Amaze file manager both installed from F-Droid