Stanford session

Evernote and Android

Ty SmithSr. Android Engineer

@tylersmithnet

Wednesday, February 27, 13

Scaling Android development


Why Android?


Daily Usage by Client


Best app


Best app


API Versions


API versions...


API versions...

• Android Compatibility Library


API versions...


• Reflection/API check


API versions...



• Emulators


API versions...



• Emulators

• Third Party Libraries


API versions...



• Emulators

• Third Party Libraries

• Actionbar Sherlock, Holo Everywhere, Otto, and Dagger


Device Sizes


Device Sizes


Device Sizes


Device Sizes


Device Sizes

• Scrollview & Linear Layouts


Device Sizes

• Fragments


Reusable Components


Reusable Components

• Notifications


Reusable Components

• Notifications

• Camera


Reusable Components

• Notifications

• Camera

• Custom Views


Reusable Components

• Notifications

• Camera

• Custom Views

• SDK


Reusable Components

• Notifications

• Camera

• Custom Views

• SDK

• Content Providers


Reusable Components

• Notifications

• Camera

• Custom Views

• SDK


• Intents


Reusable Components

• Notifications

• Camera

• Custom Views

• SDK


• Intents

• Release Profiles


Build System Difficulties



• Multiple branches of development




• Dependencies on other teams' libraries




• Dependencies on other teams' libraries

• Many distribution channels


Goal


• Security

Goal


• Security

• Build History

Goal


• Security

• Build History

• Easy Distribution

Goal


.properties

.APK

Profiles

QA

Dependencies

Build Process

Market


Support Benefits


The Evernote Platform & Android SDK


The Evernote Platform



• The platform ties together all of our products - and it’s available to everybody.




• We build great apps that help you capture and recall important information.




• We build great apps that help you capture and recall important information.

• Third party developers add new and different ways to capture and recall information, and put your Evernote data in context with all of the other services you use.


What’s in that cloud?



• Six billion HTTP requests last month.




• 20 thousand third party developers





• 1.5 billion notes have been created to date






• 380TB of user data






• 380TB of user data

• 40 million registered users


Evernote’s Apps


The Evernote Ecosystem


Remember Everything


Remember Everything

• All of your notes live together in context. Search for a meal, and you’ll find related meetings, web clips, and more.


Remember Everything

• All of your notes live together in context. Search for a meal, and you’ll find related meetings, web clips, and more.

• Every app that adds content to your Evernote account makes every other app smarter.


The Platform Team


The Platform Team

• Develop APIs, SDKs, sample code and docs


The Platform Team


• Educate developer communities about the Evernote Platform


The Platform Team



• Support developers


The Platform Team



• Support developers

• Promote great apps to our user base


Hackathons


Android SDK


Android SDK

• Open Source and an open roadmaphttps://github.com/evernote/evernote-sdk-android


https://github.com/evernote/evernote-sdk-android


Android SDK


• Library Project for easy integration




Android SDK



• Maven Central for dependency management




Android SDK




• OAuth2 for secure authentication




Android SDK




• OAuth2 for secure authentication

• Thrift for server-client communication




Android SDK: Authentication

private static final String CONSUMER_KEY = "Your consumer key";private static final String CONSUMER_SECRET = "Your consumer secret";private static final String EVERNOTE_HOST = EvernoteSession.HOST_SANDBOX;private EvernoteSession mEvernoteSession;

@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);

mEvernoteSession = EvernoteSession.init(this, CONSUMER_KEY, CONSUMER_SECRET, EVERNOTE_HOST, null);

if (!mEvernoteSession.isLoggedIn()) mEvernoteSession.authenticate(this);}

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode == EvernoteSession.REQUEST_CODE_OAUTH && resultCode == Activity.RESULT_OK) //Success, Update UI when OAuth activity returns result}


Android SDK: Creating a note

/** * This is a network request, call outside of main thread */public void createNote(String title, String content) { Note note = new Note(); note.setTitle(title);

String enmlContent = EvernoteUtil.NOTE_PREFIX + content + EvernoteUtil.NOTE_SUFFIX;

note.setContent(enmlContent); note = mEvernoteSession.createNoteStore().createNote(mEvernoteSession.getAuthToken(), note);}


Intent: Creating a note

public static final String ACTION_NEW_NOTE = "com.evernote.action.CREATE_NEW_NOTE";

public void newNoteWithContent(View view) { String text = "This is a sample text file.\nThis is line two."; String title = "New Note with Content"; Intent intent = new Intent(); intent.setAction(ACTION_NEW_NOTE); // Set the note's title and plaintext content intent.putExtra(Intent.EXTRA_TITLE, title); intent.putExtra(Intent.EXTRA_TEXT, text);

startActivity(intent); }


Intent: Viewing a note

public static final String ACTION_VIEW_NOTE = "com.evernote.action.VIEW_NOTE";

public void viewNote(View view) { String noteGuid = "63781605-3c3d-4e56-90a8-8be5e3ae7eee"; boolean hideTitleBar = true; Intent intent = new Intent(); intent.setAction(ACTION_VIEW_NOTE); intent.putExtra(EXTRA_NOTE_GUID, noteGuid); intent.putExtra(EXTRA_FULL_SCREEN, hideTitleBar); startActivity(intent);}


Hiring an Android Engineer


Personality Requirements



• Great Communication




• Strong Passion




• Strong Passion

• Problem Solver


Technical Requirements



• Object Oriented Design




• Algorithms




• Algorithms

• Data Structures




• Algorithms

• Data Structures

• Multithreaded Systems


The Interview


The Interview

• Coding Challenge


The Interview


• Phone Screen


The Interview


• Phone Screen

• 1 on 1 Interview


The Interview


• Phone Screen

• 1 on 1 Interview

• Multiple Engineers


Questions?

http://dev.evernote.com

Ty SmithSr. Android Engineer, Evernote

[email protected]@tylersmithnet


http://www.evernote.com/about/careers/

http://www.evernote.com/about/careers/

Stanford session

Documents

device sizeswednesday

android engineer

platform ties

reusable componentswednesday

api versionswednesday

evernote platformwednesday

best appwednesday

party developers