Check a Device's Network Connection
Connectivity Manager to verify internet connection
What is use of supportsRtl true in android
Android has full native support of RTL layout or text orientation since SDK 17 (Jelly Bean). Mostly mobile apps are designed in LTR (Left to Right) but few languages/designed are written from RTL (Right to Left).
Vibrate Android Phone Custom
You can vibrate your Android device using few lines of code in your project. Vibrator is one of the most and useful devices for mobile phones.