Whats new in Android Studio 3.0

Android Studio is the official tool for developing Android applications, includes everything we need.

To get the latest version of android studio click Help > Check for update (on Mac, Android Studio > Check for updates).

If you're the MAC user you'll face the following issue, just click cancel and continue.

The primary purpose of the 3.0 is to improve the build performance for that projects which have a large number of modules. When using this plugin with large project. you should experience the following updates 

• Support for android 8.0

• Support for building separate APKs based on language resources. 

• Support for Java 8 libraries and Java 8 language features (without the Jack compiler).
  
• Improved Gradle Sync speed
  
• AAPT2 is now enabled by default in
  
• Kotlin Support
  
  
• Supports the device file explorer
  
  To open click View > Tool Windows > Device File Explorer.
  
  

• Supports developing intant apps
  
  
• Supports the adaptive icons for launching the androids apps in 8.0
  to start, right-click on the res folder in your project, and then click New > Image Asset. In the Asset Studio window, select Launcher Icons (Adaptive and Legacy) as the icon type.

          

• Supports for font resources, you can choose various inbuilt font resources for your Android projects, instead of adding manually onto font folder
  
  
  
  
• Added Google Moven repository./
  Android studio now uses Google's moven repository by default instead of depending on Android SDK manager to get updates for Android support library, Google play services, Firebase and other dependencies
  

  allprojects {
      repositories {
          google()
      }
  }

• Native debugging with windows-32 no longer supports.
  in case if developers chooses to debug apps using window-32 they can use Android Studio 2.3.

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Fingerprint Authentication

                           

Android 6.0 Marshmallow offers new features for developers and user. This post will help developers to teach how to add Fingerprint authentications to apps.

There are several advantages of using the fingerprint authentications

> Fast and easy to use

> Secured : fingerprint uniquely identifies
> Online transactions are safer 

There are several steps you have to follow before using fingerprint, It could really seems quite complex but this post help you step by step.

* Verify that lock screen is secured by PIN, password or pattern
* Check at least on fingerprint is registered on your phone
* Get access to android keystore to store the key used to encrypt or decrypt an object
* Generate an encryption key and the cipher
* Start the authentication process
* Implement callback methods to handle authentication event

Pre-requisites Android SDK 26
Android build tool v26.0.1
Android support repository


Before starting our app should get permission to access the sensor and fingerprint from android core, It can be done by just adding permission tag in manifest.xml file

<uses-permission android:name="android.permission.USE_FINGERPRINT" /> 

Now we create mainActivity class to handle all authentication process.
FingerprintAuthenticationDialogFragment.java

Small helper class to manage text/icon around fingerprint authentication UI.

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Reactive Native Sample App

                            

What is reactive native ?Reative Native is an framework for designing the native mobile applications.
It is javascript code library developed by facebook available on Github from 2013

React Native helps the developer to reuse the code across web and on mobile
Ex : Facebook,

What platform the reactive native supports ?
IOS and Android

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Android Wear App

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Mockito Framework

Mockito is a mocking framework, it is widely used the in unit testing JAVA application.

Unit testing is used to maintain & improve the quality of product through unit testing and test-driven development

Mocking is the process of testing the functionality of class in isolation.

Mocking does not require database connection or properties file read or file server read to test functionality. A Mock object returns some dummy data corresponding to some dummy input.

Mock object are nothing but proxy for actual implementation 

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JUnit

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Data Binding Library

Data binding library are used to write declarative layouts and minimise the glue code necessary to bind your application logic and layouts.


Before start integration data binding, I would like to tell the some advantages of library.

Advantages of data binding library :

• Offers flexibility and broad compatibility
  
  
• Its a support library so we can use it with all android platforms
  
  
• Removes the boiler plate code
• Stronger readability 

librar

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