The document discusses scaling Android development at Evernote. It covers managing API versions and device sizes, creating reusable components, and dealing with build system difficulties. It also describes Evernote's Android SDK and platform, including authentication, creating notes, and intents. Hiring requirements for an Android engineer include strong communication, passion for problem solving, expertise in object oriented design, algorithms, data structures, and multithreaded systems. The interview process involves a coding challenge, phone screen, interview with multiple engineers.

1. Evernote and Android
Ty Smith
Sr. Android Engineer
@tylersmithnet
Wednesday, February 27, 13

2. Scaling Android development
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3. Why Android?
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4. Daily Usage by Client
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5. Best app
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6. Best app
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7. API Versions
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8. API versions...
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9. API versions...
• Android Compatibility Library
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10. API versions...
• Android Compatibility Library
• Reflection/API check
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11. API versions...
• Android Compatibility Library
• Reflection/API check
• Emulators
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12. API versions...
• Android Compatibility Library
• Reflection/API check
• Emulators
• Third Party Libraries
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13. API versions...
• Android Compatibility Library
• Reflection/API check
• Emulators
• Third Party Libraries
• Actionbar Sherlock, Holo Everywhere, Otto,
and Dagger
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14. Device Sizes
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15. Device Sizes
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16. Device Sizes
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17. Device Sizes
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18. Device Sizes
• Scrollview & Linear Layouts
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19. Device Sizes
• Fragments
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20. Reusable Components
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21. Reusable Components
• Notifications
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22. Reusable Components
• Notifications
• Camera
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23. Reusable Components
• Notifications
• Camera
• Custom Views
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24. Reusable Components
• Notifications
• Camera
• Custom Views
• SDK
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25. Reusable Components
• Notifications
• Camera
• Custom Views
• SDK
• Content Providers
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26. Reusable Components
• Notifications
• Camera
• Custom Views
• SDK
• Content Providers
• Intents
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27. Reusable Components
• Notifications
• Camera
• Custom Views
• SDK
• Content Providers
• Intents
• Release Profiles
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28. Build System Difficulties
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29. Build System Difficulties
• Multiple branches of development
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30. Build System Difficulties
• Multiple branches of development
• Dependencies on other teams' libraries
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31. Build System Difficulties
• Multiple branches of development
• Dependencies on other teams' libraries
• Many distribution channels
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32. Goal
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33. Goal
• Security
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34. Goal
• Security
• Build History
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35. Goal
• Security
• Build History
• Easy Distribution
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36. Build Process
Profiles
Dependencies
.properties
.APK
QA Market
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37. Support Benefits
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38. The Evernote Platform & Android SDK
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39. The Evernote Platform
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40. The Evernote Platform
• The platform ties together all of our products - and it’s
available to everybody.
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41. 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.
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42. 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.
• 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.
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43. What’s in that cloud?
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44. What’s in that cloud?
• Six billion HTTP requests last month.
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45. What’s in that cloud?
• Six billion HTTP requests last month.
• 20 thousand third party developers
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46. 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
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47. 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
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48. 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
• 40 million registered users
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49. Evernote’s Apps
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50. The Evernote Ecosystem
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51. Remember Everything
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52. Remember Everything
• All of your notes live together in context. Search for a
meal, and you’ll find related meetings, web clips, and
more.
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53. 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.
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54. The Platform Team
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55. The Platform Team
• Develop APIs, SDKs, sample code and docs
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56. The Platform Team
• Develop APIs, SDKs, sample code and docs
• Educate developer communities about the Evernote
Platform
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57. The Platform Team
• Develop APIs, SDKs, sample code and docs
• Educate developer communities about the Evernote
Platform
• Support developers
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58. The Platform Team
• Develop APIs, SDKs, sample code and docs
• Educate developer communities about the Evernote
Platform
• Support developers
• Promote great apps to our user base
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59. Hackathons
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60. Android SDK
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61. Android SDK
• Open Source and an open roadmap
https://github.com/evernote/evernote-sdk-android
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62. Android SDK
• Open Source and an open roadmap
https://github.com/evernote/evernote-sdk-android
• Library Project for easy integration
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63. Android SDK
• Open Source and an open roadmap
https://github.com/evernote/evernote-sdk-android
• Library Project for easy integration
• Maven Central for dependency management
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64. Android SDK
• Open Source and an open roadmap
https://github.com/evernote/evernote-sdk-android
• Library Project for easy integration
• Maven Central for dependency management
• OAuth2 for secure authentication
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65. Android SDK
• Open Source and an open roadmap
https://github.com/evernote/evernote-sdk-android
• Library Project for easy integration
• Maven Central for dependency management
• OAuth2 for secure authentication
• Thrift for server-client communication
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66. 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;
@Override
public 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);
}
@Override
public 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
}
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67. 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);
}
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68. 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);
}
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69. 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);
}
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70. Hiring an Android Engineer
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71. Personality Requirements
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72. Personality Requirements
• Great Communication
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73. Personality Requirements
• Great Communication
• Strong Passion
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74. Personality Requirements
• Great Communication
• Strong Passion
• Problem Solver
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75. Technical Requirements
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76. Technical Requirements
• Object Oriented Design
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77. Technical Requirements
• Object Oriented Design
• Algorithms
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78. Technical Requirements
• Object Oriented Design
• Algorithms
• Data Structures
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79. Technical Requirements
• Object Oriented Design
• Algorithms
• Data Structures
• Multithreaded Systems
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80. The Interview
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81. The Interview
• Coding Challenge
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82. The Interview
• Coding Challenge
• Phone Screen
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83. The Interview
• Coding Challenge
• Phone Screen
• 1 on 1 Interview
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84. The Interview
• Coding Challenge
• Phone Screen
• 1 on 1 Interview
• Multiple Engineers
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85. Questions?
http://dev.evernote.com
Ty Smith
Sr. Android Engineer, Evernote
tsmith@evernote.com
@tylersmithnet
Wednesday, February 27, 13