You need to be a skillful programmer if you want to master Android.
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Java
The most basic building block of Android development is the programming language Java. To be a successful Android developer, you’ll need to be comfortable with Java concepts like loops, lists, variables, and control structures. Java is one of the most popular programming languages used by software developers today, so learning its ins and outs will stand you in good stead for work even beyond the Android platform.
SQL
You’ll also need to learn the basics of SQL in order to organize the databases within Android apps. SQL is a language for expressing queries to retrieve information from to databases. Once you can write it, there won’t be any questions you can’t ask of your data.
Android Software Development Kit (SDK) and Android Studio
One of the best parts about developing for Android is that the necessary tools are free and easy to obtain. The SDK TOOL is available via free-of-charge download, as is ANDROID STUDIO, the official integrated development environment (IDE) for Android app development. Android Studio is the main program with which developers write code and assemble their apps from various packages and libraries. The Android SDK includes sample code, software libraries, handy coding tools, and much more to help you build, test, and debug Android applications.
Another highlight of developing for Android is the ease of the process of submitting apps. Once you’re ready to submit your app to the Google Play store, register for a Google Play publisher account (which includes paying a $25 fee via Google Wallet), follow ANDROID LAUNCH CHECKLIST , submit through the Google Play Developer Console, wait for Google to approve, and see it appear. Simple and satisfying.
Link for sdk-
Update the IDE and SDK Tools
Link for Android Studio-
Download Android Studio and SDK Tools
Link for Android launch checklist-
Launch checklist
XML
Programmers use XML to describe data. The basics of the XML syntax will be helpful in your journey to full-fledged Android developer in doing tasks like designing user interface (UI) layouts and parsing data feeds from the internet. Much of what you’ll need XML for can be done through Android Studio, but it’s constructive to be grounded in the basics of the markup language.
The Soft Skills
As with any job, it’s not enough to have the technical stuff down pat. You’ve got to sharpen your interpersonal skills as much as your coding chops.
Perseverance
Practice really does make perfect when it come to app development. Inevitably, you’re going to hit a roadblock in the development process, especially when you first start out. You’ll need a deep store of perseverance to power you through the frustrating times. Luckily, since Android is open-source, Android developers can take advantage of crowd-created libraries and frameworks posted on sites like Github.
Collaborativeness
Collaboration is of vital importance to most developer jobs. Even if you’re working by yourself on a project, you’ll inevitably have to put heads together with others—like designers, marketers, or upper management—in the company or organization. Start getting comfortable with accepting feedback on your work, compromising with coworkers, and teaming up with other players to create exceptional products.
Thirst for Knowledge
All good developers, mobile or otherwise, are committed to lifelong learning. Especially in the rapidly developing landscape of mobile apps: with the advent of wearables, TV apps, auto apps, and more, mobile developers must keep their eyes and ears open to new technology and changing best practices. No matter how advanced you get, don’t stop investigating, exploring, playing around, and asking questions.