Fix the rotation on Nexus 7 2013

Like so many other Nexus 7 owners, I experienced the disappearance of the ability to rotate the screen on the device automatically.
Fortunately, the solution is relatively simple and very effective. The opening of the back cover looks a bit scary at first but is fairly easy if you play a guitar and have a pick readily available.

http://forums.androidcentral.com/google-nexus-7-tablet-2013/487135-nexus-7-2013-stopped-rotating.html

To quit an app or not?

Excellent justification for not creating an explicit Exit app functionality in mobile applications:
http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon

Push - coming to browsers near you

Firefox just implemented Push technology for web pages that are not (even) loaded in the browser.

Read more

SQLite Tools

Assembling the list of tools for SQLite that I've posted in other, separate, posts:

• DB Browser for SQLite
• SQLite Studio

 

Android 6.0 Marshmallow for Nexus 7

Here are the steps and the links for installing the Android 6 on Nexus 7 WiFi 2013.

Device: Nexus 7 2013 WiFi, razor / flo

Bootloader keys: volume down (press and hold), then power (press and hold).

Factory images:
https://developers.google.com/android/nexus/images?hl=en


TWRP: 
https://twrp.me/https://twrp.me/devices/asusnexus72013wifi.html
fastboot flash recovery twrp.img


SuperSU
https://www.chainfire.eu
Modified boot images:
http://forum.xda-developers.com/apps/supersu/wip-android-6-0-marshmellow-t3219344
fastboot flash boot boot.img
SuperSU binary
http://forum.xda-developers.com/apps/supersu/2014-09-02-supersu-v2-05-t2868133
flash through TWRP.


Source: How to root
http://www.ibtimes.co.uk/how-root-android-6-0-marshmallow-build-mra58k-nexus-5-6-7-9-nexus-player-1522653

f.lux for Android

The recommended app is Twilight (link).

5 Best Alternative Apps like F.lux for Android

Model Tree Structures

Here is a good overview of the structures that can be used to store a graph / tree model in a flat / relational database.
Model Tree Structures in Mongo DB(link)