Websites / Blogs
Android Developers
http://developer.android.com/index.html
You should know definitely know this website by now. More contents are being added time to time. I try to come back and update my knowledge.
androiduiux
UI & UX
Medium (Android App Development)
Androidhive
Great
tutorials with source code.
vogella
Awesome tutorials
Youtube - Android Developers
Very useful.
Android Weekly
Get weekly Android news. I also use Google Alert for Android related news.
Android-er (Blog)
Good examples.
-----
Tools
Device Art Generator
This site is for app screenshot. I created above screenshots using this tool.
Launcher Icon Generator
If you just want a simple launcher icon, then use this site.
Android Layout Finder
Auto generate findViewById() from the layout XML.
JSON Parser (Validator)
http://json.parser.online.fr/
Validates and easily view the JSON.
DPI Calculator
http://jennift.com/dpical.html
9-Patch-Resizer
https://github.com/redwarp/9-patch-resizer
It resizes 9-patch png to different density (from xhdpi -> hdpi, mdpi, etc)
Android Device Screen Sizes
http://www.emirweb.com/ScreenDeviceStatistics.php
Sometimes you want to know a certain device's resolution in either pixel or by dp.
For example, Nexus 5 uses 640x360 dp and xxhdpi.
App Icon Resizer
https://resizeappicon.com/
Just drop a launcher icon and it will generate all icon sizes for Android and iOS
Postman (Chrome Extension)
https://chrome.google.com/webstore/detail/postman/fhbjgbiflinjbdggehcddcbncdddomop
REST Client: Manually call HTTP GET/POST on a browser
JSON Parser (Validator)
http://json.parser.online.fr/
Validates and easily view the JSON.
DPI Calculator
http://jennift.com/dpical.html
9-Patch-Resizer
https://github.com/redwarp/9-patch-resizer
It resizes 9-patch png to different density (from xhdpi -> hdpi, mdpi, etc)
Android Device Screen Sizes
http://www.emirweb.com/ScreenDeviceStatistics.php
Sometimes you want to know a certain device's resolution in either pixel or by dp.
For example, Nexus 5 uses 640x360 dp and xxhdpi.
App Icon Resizer
https://resizeappicon.com/
Just drop a launcher icon and it will generate all icon sizes for Android and iOS
Postman (Chrome Extension)
https://chrome.google.com/webstore/detail/postman/fhbjgbiflinjbdggehcddcbncdddomop
REST Client: Manually call HTTP GET/POST on a browser
