Improve reader navigation

[suiso67]

Reader

• Fixed action bar overlapping system bar

Preferences

• Add preferences screen

Configurable Navigation Overlay Activation Type

• Long tap(default behavior)
• Single tap
• Single tap allowing double tap to zoom

Adjustable Touch Area Size

• Seek bar will adjust touch area size for page turning between 10% ~ 30% of screen width

Misc.

• Add gradle wrapper

[edeso]

thanks for contributing. it's quite a lot of changes in one PR though.

please separate them into one PR per change and add a detailed description what it is supposed to fix or implement. what is missing/not working before this change is committed?

you can omit

refactor: add gradle wrapper as i'd rather generated them locally and pushed them already

refactor: remove commented dependencies already as these commented entries are needed for now.

these need explanations

feat: keep main activity below system bar
why? having the ui translucent above the comic was a conscious design decision. what is your issue that you need this disabled?

feat: add reader overlay for enhanced navigation ui
this is merely a renaming refactoring plus android:fitsSystemWindows="true" which is disabled by design. same question, why?

feat: show navigation overlay on single touch, not long press, feat: move reader navigation activation mode into preferences
again, long press was a conscious decision to prevent accidential menu activations as in the original Bubble app. the configurable option is a nice touch. but actually i'd rather switch to a drag down from, drag up from bottom for default menu activation in reader.

feat: revert reader navigation overlay style
you lost me here. what is this supposed to solve?

feat: support adjustable reader navigation touch area size, feat: add title and summary to preferences screen
that needs more explanation to the user and i feel this is over-costumization. i strive for simple but elegant with Bubble2

under consideration is

refactor: clean up navigation touch listener
s a refactoring that changes no functionality still i see that it has a cleaner approach.