How to call REST (POST) or GET webservice from Android

RESTful Web services: The basics

Representational State Transfer (REST) has gained widespread acceptance across the Web as a simpler alternative to SOAP- and Web Services Description Language (WSDL)-based Web services. Key evidence of this shift in interface design is the adoption of REST by mainstream Web 2.0 service providers—including Yahoo, Google, and Facebook—who have deprecated or passed on SOAP and WSDL-based interfaces in favor of an easier-to-use, resource-oriented model to expose their services. In this article, Alex Rodriguez introduces you to the basic principles of REST.
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Broadcast receivers in android

Broadcast Receiver

 Class Overview

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Base class for code that will receive intents sent by sendBroadcast(). 

If you don't need to send broadcasts across applications, consider using this class with LocalBroadcastManager instead of the more general facilities described below. This will give you a much more efficient implementation (no cross-process communication needed) and allow you to avoid thinking about any security issues related to other applications being able to receive or send your broadcasts.

Change status bar color in android

You can customize the look of the material theme according to your brand identity with a color palette you control. You can tint the action bar and the status bar using theme attributes

The system widgets have a new design and touch feedback animations. You can customize the color palette, the touch feedback animations, and the activity transitions for your app.
The material theme is defined as: