Android development has come a long way since its inception. With the introduction of new technologies, tools, and libraries, developers have been able to create powerful apps with an enhanced user experience. 

One such tool is Android Libraries which developers use to help build better applications faster and more efficiently. These libraries provide the necessary components that can be used in various parts of your application, such as networking, UI design or animation, etc., thus making it easier for you to develop great apps quickly without having to write code from scratch every time. 

 In this blog post, we will discuss some of the Best Android Libraries for Developer today:

 1) Retrofit: It is one of the most popular libraries among Android developers. It helps build efficient REST API clients quickly by using annotations and interface definitions inside Java classes directly on top of the OkHttp library. It also automatically supports conversion between JSON/XML/Protobufs data formats while enabling caching mechanisms & customizing request parameters at runtime.  

 2) Dagger 2: This dependency injection framework allows you to write less amount code when dealing with complex object creation scenarios, thus reducing boilerplate codes significantly. The main advantage here lies in its ability to generate optimized source files during the compile time so that performance isn't compromised even if multiple injections are involved throughout an app's lifecycle.  

 3) RxJava /RxAndroid: Reactive Extensions (RxJava ) provide a reactive programming model based on Observables, which makes it easy for us as programmers not only to create asynchronous tasks but also combine them into chains or sequences where each task depends upon previous results produced from other functions within the same chain before being executed itself! This approach helps reduce complexity when dealing with large datasets & heavy operations like network calls.   

 4) Glide: A fast image-loading library designed specifically for Android devices, capable enough o handle different types of images ranging from small thumbnails to high-resolution photos! Its memory management capabilities ensure our device doesn't run out of memory while simultaneously loading images over a network connection without hiccups!        

5 ) Room Persistence Library (Room DB): An ORM layer built on top of SQLite database allowing us to store structured data locally within our app's private storage space securely via simple POJO objects representing tables instead of writing raw queries manually every time we need access to particular records form db instance!