Angulo Code

Add progress dialog to drop time measurement.

Implement height measurement from dropping time.

Bump copyright year in message.

Implement custom activity for the height preference. Will be extended to implement dropping time measurement in the future.

Make user height configurable (manual entry only).

Implement first version of distance calculation. User's height is hard-coded for now.

Move sensor event code into AnguloBase.

Fix size calculation so that the cross-hair on-top drawing is actually at the centre.

Handle camera display orientation.

Use custom view classes for camera preview and on-top drawing.