First Do No Harm - Droidcon Boston
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Developing Android applications is a powerful way to connect people with the information they need the most. Apps are for living your life: daily commutes, traveling abroad, handling your money, communicating with family, and much more! This places the responsibility of engineering top-notch software squarely in the laps of us developers. Unlike doctors, we were not required to take an oath or pledge when becoming Android Developers. However, we can still learn much from the principles behind the phrase, “First, do no harm.” In this talk, we will discuss over a dozen tools that are at your disposal as a developer which can enable you to provide high quality applications to your users. Thus allowing you to first, do no harm!
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First Do No Harm - Droidcon Boston
- 2. 7 to 9 years @brwngrldev
- 3. What’s Involved: • Major in Math/Science • Take the MCAT • Go to Medical School • Take the USMLE Step 1 • Do Rotations • Take the USMLE Step 2 @brwngrldev
- 4. What’s Involved: • Major in Math/Science • Take the MCAT • Go to Medical School • Take the USMLE Step 1 • Do Rotations • Take the USMLE Step 2 • Complete Internship • Do Residency • Take the USMLE Step 3 • Take the Board Exams • Do a Fellowship @brwngrldev
- 10. How can I become an Android Developer? @brwngrldev
- 11. How can I become a great Android Developer? @brwngrldev
- 15. Newsletters
- 16. Podcasts
- 17. Online Courses • At your own pace • All aspects of development • Different perspectives
- 18. Online Courses - Udacity
- 19. Online Courses - Caster.IO
- 20. “If you associate with eagles, you will learn how to soar…” - Ojo Michael E.
- 21. Conferences • Hear from the Experts • Grow your Network • Learn new Techniques
- 22. Conferences
- 23. Open Source • Countless Examples • Learn by Doing • Design Patterns in Action
- 26. Open Source
- 27. Study • Newsletters • Podcasts • Online Courses • Conferences • Open Source @brwngrldev
- 30. Prevention • Static Code Analysis • Code Reviews • Leak Canary • Automated Testing • API Testing @brwngrldev
- 32. Static Code Analysis 0 40 80 120 160 Checkstyle FindBugs PMD Error Prone Lint @brwngrldev
- 33. Static Code Analysis - FindBugs
- 34. Static Code Analysis - FindBugs
- 35. Code Reviews
- 36. Code Reviews
- 37. Code Reviews
- 38. Code Reviews • Catch Issues • Gain Exposure to New Ideas • Promotes Consistent Design • Ensures Maintainability
- 39. Code Reviews
- 40. Leak Canary debugCompile “…:leakcanary-android:$leak” releaseCompile “…:leakcanary-android-no-op:$leak” testCompile “…:leakcanary-android-no-op:$leak” @brwngrldev
- 41. Leak Canary private BooksAdapter booksAdapter; @Bind(R.id.recyclerView) RecyclerView recyclerView; private static Toolbar toolbar; private BooksPresenter booksPresenter; @brwngrldev
- 43. Architecture
- 48. @brwngrldev
- 50. API Testing
- 51. API Testing - Postman
- 52. API Testing - Postman 1.Send Requests 2.Receive Response 3.Run Test Scripts
- 53. Sending Requests
- 54. API Response [ { "userId": 1, "id": 1, "title": "sunt aut facere repellat", "body": "quia et suscipitnsuscipit recusandae" }, { "userId": 1, "id": 2, "title": "qui est esse", "body": "est rerum tempore vitaensequi sint" } ] https://jsonplaceholder.typicode.com
- 55. Test - Status Code tests["Status code is 200"] = responseCode.code === 200; @brwngrldev
- 56. Test - Schema var schema = { "type": [“array”, “null”] }; var jsonData = JSON.parse(responseBody); tests["Valid Schema"] = tv4.validate(jsonData, schema); @brwngrldev
- 58. Test - Schema @brwngrldev { "userId": 1, "id": 1, "title": "sunt aut facere repellat provident", "body": "quia et suscipitnsuscipit recusandae" }
- 59. Test - Schema var postSchema = { "type" : "object", "properties" : { "userId": { "type" : "integer" }, "id": { "type" : "integer" }, "title": { "type" : "string" }, "body" : { "type" : "string" } } }; @brwngrldev
- 60. API Testing
- 61. Set Up Monitors
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- 64. 74 year old stomach pain 34 year old stomach pain @brwngrldev
- 65. @brwngrldev
- 70. CODE @brwngrldev
- 71. @Override public void onFailure(Call<Book> call, Throwable t) { bus.post(new BookLoadingErrorEvent(id)); Timber.e(t, "Unable to load the book data from API."); } Write Logs
- 72. Logcat/Pidcat
- 74. Log Events public void trackEvent(String event) { analytics.track(event); if (Fabric.isInitialized()) { Crashlytics.log(event); } }
- 75. Crashlytics
- 77. Crashlytics
- 78. Crashlytics
- 79. Classy Shark
- 80. Classy Shark
- 84. …Battery Citizen
- 87. mitmproxy brew install python3 pip3 install mitmproxy mitmproxy --host @brwngrldev
- 88. mitmproxy
- 89. mitmproxy
- 90. Systrace
- 94. Apk Analyzer
- 95. Android Profiler
- 96. Android Profiler
- 97. Android Profiler
- 100. EMULATOR @brwngrldev
- 101. Android Options: GPU Overdraw blue -> green -> light red -> dark red (1x) (4x or more)
- 103. Android Options: Profile GPU Rendering 16 milliseconds @brwngrldev
- 104. Android Options: Profile GPU Rendering https://developer.android.com/studio/profile/dev-options-rendering.html
- 105. Diagnosis
- 108. Resources • http://www.kotlinweekly.net - Kotlin Weekly • http://androidweekly.net - Android Weekly • https://www.androiddevdigest.com - Android Dev Digest • http://www.adavis.info/2015/07/android-devs-listen-up.html - Podcasts • https://www.udacity.com - Udacity • https://caster.io - Caster.IO • http://androidstudygroup.github.io/conferences - Android Conferences
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