App update

[afischerdev]

The update is triggered from the issue 'update lookups' #468.

The app uses a download worker that runs in a foreground process (Android term since you can't see it, I'd say background).
So if you leave the app, the download process will continue even if you kill the app in the task list. When you re-enter the app you get in contact with the process again.

Process is stoppable from the status line or from the installer app.

The app should guide the user in the case of version differences (server, client) so that the update problem becomes clear and transparent.

It works with two dialogs

• one for the main decision: update all. update only selected and drop others or cancel.
• an other one for the situation lookups version is already new, some tiles have old version: update all old tiles, drop old files or cancel

For tests, a manageable number of tiles was generated with version 9 in lookups.dat and transferred manually to the phone.

Tests for the new apk:

Start	User	Action	Result
lookups.dat version 9, 3 tiles version 9	select update for all tiles	no dialog	new lookups, 3 new tiles
lookups.dat version 9, 3 tiles version 9	select one tile for update	option dialog: cancel	start situation
lookups.dat version 9, 3 tiles version 9	select one tile for update	option dialog: only selected	new lookups, 1 new file
lookups.dat version 9, 3 tiles version 9	select one tile for update	option dialog: select all	new lookups, 3 new tiles
lookups.dat version 9, 3 tiles version 9	select one new tile	option dialog: only selected	new lookups, 1 new tile
lookups.dat version 9, 3 tiles version 9	select one new tile	option dialog: select all	new lookups, 4 new tiles
lookups.dat version 9, 3 tiles version 9	select all tiles for update	no dialog, user breaks update, after one tile	new lookups, 1 new, 2 old tiles
	differences in versions
lookups.dat version 10, 2 tiles version 9, 1 tile version 10	select all tiles for update	no dialog	new lookups, 3 new tiles
lookups.dat version 10, 2 tiles version 9, 1 tile version 10	select one tile for update	option dialog: cancel	start situation
lookups.dat version 10, 2 tiles version 9, 1 tile version 10	select one tile for update	option dialog: update all	new lookups, 3 new tiles
lookups.dat version 10, 2 tiles version 9, 1 tile version 10	select one tile for update	option dialog: drop old	new lookups, 1 new tile