We design and develop great software for mobile and web.

Android libraries which we use on daily basis

Ivan Kocijan

ViewsDiscreet app rateButterKnifePicasso Universal Image LoaderGlideViewPager IndicatorCircleImageViewAndroid crop

APIRetrofitGSON

DatabaseDbFlowAndroid dbInspector

TestingMockitoRoboelectricOkHttp

OtherCrashlyticsEventbusDaggerJoda Time

Discreet app rate

ButterKnife

• View "injection" library

• It finds and automatically cast the corresponding view in your layout

• Helps you write less code

ButterKnife usage

ViewPagerIndicator

• Paging indicator widgets compatible with the ViewPager

• Helps you provide a clear indicator that additional content exist

ViewPagerIndicator usage

CircleImageView

CircleImageView usage

Android crop

• Provides a simple image cropping

• Simple configuration

• Backwards compatible to Gingerbread

• Nice and clean UI

Android crop usage• Declare CropImageActivity in your manifest file

Android crop usage - part2

UniversalImageLoader

• Library for loading, caching and displaying images

• Highly customizable

• You can cache images on disk or memory or both

UIL usage - part 1

UIL usage - part 2

Glide

• Glide supports fetching, decoding and displaying video stills, images, and animated GIFs.

• Uses a custom HttpUrlConnection but it can use Volley or OkHttp library instead

Glide usage

Picasso

• Image downloading and caching library

• Easy to use

• Automatic memory and disk caching.

Picasso usage

UIL vs Picasso vs Glide

Objective:

• Load 8268x14173px (11MB) image into ImageView

• Do not use custom configuration

Results

Glide UIL Picasso

Memory allocated (MB) 13 MB 20 MB ∞Time (s) 28 sec 46 sec ∞

GSON

• Convert Java Objects into their JSON representation

• Convert a JSON string to an equivalent Java object

GSON usage - part 1

GSON usage - part 2

Retrofit

• Use annotations to describe the HTTP request

• URL parameter replacement and query parameter support

• Multipart request body and file upload

Retrofit usage - part 1

Retrofit usage - part 2

DbFlow

• ORM android database library with annotation processing

• Very fast

• Triggers, Views, Indexes, and many more SQLite features

• Approved by Željko Plesac

DbFlow usage - part 1

DbFlow usage - part 2

DbFlow usage - part 3

DbFlow - I want more!

• Check out Android Talks #10

DbInspector• Created by Dino Kovač

• View the contents of the in-app database for debugging purposes

• No need to pull the database from a rooted phone

• Approved by Željko Plesac

• Android talks #5

Mockito

• “Mockito is a mocking framework that tastes really good”

• Create readable unit tests which produce clean verification errors

• Top 10 Java library across all libraries

Robolectric

• A unit test framework that helps you test-drive the development of your Android app

• Robolectric handles inflation of views, resource loading, and lots of other stuff.

• Run your tests on your workstation, or on your Continuous Integration environment

OkHttp• Create MockWebServer

Crashlytics

• Light weight crash reporting solution

• Easy to use

• Android studio plugin

• Very powerful

Eventbus

• Publish/subscribe event bus

• Simplifies the communication between components

• Has advanced features like delivery threads, subscriber priorities

Eventbus usage1. Define event

public class MessageEvent { /* Additional fields if needed */ }

2. Register subscriberEventBus.getDefault().register(this);

public void onEvent(MessageEvent event) {// Do something };

3. Register onEvent method

EventBus.getDefault().post(new MessageEvent());

4. Post event

Dagger

• Dependency injector for Android and Java

• Makes each class easy to test

• Create reusable modules

• Check out their official site

Joda Time• Replacement for the Java date and time classes

• Provides simple API

• Multiple calendar systems

• Under active development since 2002

• From Java SE 8 onwards, users are asked to migrate to java.time

Links• ButterKnife - http://jakewharton.github.io/butterknife/• ViewPagerIndicator - http://viewpagerindicator.com/• CircleImageView - https://github.com/hdodenhof/CircleImageView• Android Crop - https://github.com/jdamcd/android-crop• UniversalImageLoader - https://github.com/nostra13/Android-Universal-Image-Loader• Glide - https://github.com/bumptech/glide• Picasso - http://square.github.io/picasso/• Retrofit - http://square.github.io/retrofit/• GSON - https://code.google.com/p/google-gson/• DbFlow - https://github.com/Raizlabs/DBFlow• DbInspector - https://github.com/infinum/android_dbinspector• EventBus - https://github.com/greenrobot/EventBus• Dagger - http://square.github.io/dagger/• JodaTime - http://www.joda.org/joda-time/• Mockito - http://mockito.org/• Roboelectric - http://robolectric.org/• OKHttp - https://github.com/square/okhttp• Discreet app rate - https://github.com/PomepuyN/discreet-app-rate• Crashlytics - https://try.crashlytics.com/

email: ivan.kocijan@infinum.hrtwitter: @ikocijan Android talks: infinum.coAndroid talks video: Youtube channel

Thank you!