New thumbnail implementation

[k3b]

Goal: replace thumbnail display from android-s internal implementatation with external lib

[HoWilgh]

Is it possible to put the thumbnails of 'APhotoManager' on the sdcard?

[k3b]

@HoWilgh yes via Settings/Photos/Thumbnail-Folder but only if android allows write access to sdcard (i.e. if device is rooted or on old android versions).

I use this on my android-4.2 tablet that only has 768mb internal memory.

[HoWilgh]

I know this option but have not been able to find the correct path to enter there. I use Android-6.1 and do have to use Storage Access Framework (SAF) to write on the sd-Card. But with SAF I do not see any path information I can select. I guess this has to be provided by the app.... by an folder picker supporting SAF.

[k3b]

@HoWilgh sorry the app does not support read/write to SAF (#61) . on my android-7.1 i used the option to make the sd-card part of the internal memory so every android app with write permisson can use the memory via file system.

If you know how to fix this merge-requests on the master branch are welcome