Android libraries I wish I knew when I started

Android tech talk at Tecnologico de Monterrey celebrating Semana-I on September 29th, 2016

Transcript

1. Android libraries I wish I knew when I started
2. ALIWIKWIS ICYMI IDK FYI WTF BRB
3. Android Engineer Software Engineer | Epicor Software @lalongooo lalongooo.com Jorge E. Hernández
4. What do I do?
5. When entering to work at SEP, most Mexico teachers get assigned to work far away from home. A little story…
6. Expensive transportation/living costs Work away from home, family & friends Lack of productivity in the classroom Problem
7. Fortunately…
8. and there is more…
9. Data structure: directed graph Algorithm: all simple cycles Solution
13. App to let teachers share their need to move to another workplace to: spend time with family Solution educate better for the future save money on transportation, living
14. 250+ have moved Now 1000+ join SEP every year 3500+ registered users
15. Permutas SEP bit.ly/permutassep
16. Building a new app? Don’t reinvent the wheel
17. •  Manage multiple views •  Load and display images •  Fetch data from an API •  Parse JSON •  Persist data to storage A lot of apps do similar things
18. •  Manage multiple views •  Load and display images •  Fetch data from an API •  Parse JSON •  Persist data to storage A lot of apps do similar things
19. •  Manage multiple views •  Load and display images •  Fetch data from an API •  Parse JSON •  Persist data to storage A lot of apps do similar things
20. •  Manage multiple views •  Load and display images •  Fetch data from an API •  Parse JSON •  Persist data to storage A lot of apps do similar things
21. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
22. Welcome to the 5 months mins Android Course
23. How to create Android UI components? activity_main.xml
27. Android Resources
28. The R class
29. How to handle those Android UI components?
30. End of the Android course
31. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
32. Butter Knife
33. •  No additional cost at run-time •  Improved View lookups •  Improved Listener attachments Butter Knife
34. Without Butter Knife
35. Using Butter Knife
36. Buttons & clicks
37. Without Butter Knife
38. Using Butter Knife
39. Butter Knife also supports OnLongClick OnEditorAction OnFocusChange OnItemClick OnItemLongClick OnItemSelected OnPageChange OnTextChanged OnTouch OnCheckedChanged
40. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
41. Picasso
42. •  Makes HTTP Requests •  Caches the images •  Easy resizing/cropping/centering/scaling •  Takes care of downloading off the main thread Picasso
43. ImageView is defined as:
44. Which do you prefer?
45. First…
46. Then…
47. Or…
48. Awesome! But there’s more…
49. Not just for loading images from the web
50. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
51. Retrofit
52. •  Type safe •  Built in support for Authentication •  Parse JSON to POJOs (with a JSON factory) •  Can be executed synchronously or asynchronously Retrofit
53. Let’s stalk Linus Torvalds
54. Retrofit turns your HTTP API into a Java interface.
55. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
56. Gson
57. •  Convert JSON to a java object and vice versa •  Doesn't require Java annotations in your classes •  Super optimized •  Commonly used Gson
58. Create your model/class
59. Serialize to JSON
60. Deserialize to POJO (Plain Old Java Object)
61. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
62. Realm
63. •  Works by extending your models •  Made for mobile •  Most queries in Realm are fast enough to be run synchronously •  Can have multiple realm database in an app Realm
64. Create your model/class
65. Save to the Realm database
66. Accessing database
67. Conditions
68. Don’t reinvent the wheel. Use these libraries: •  Manage multiple views Butter Knife v8.2 •  Load and display images Picasso v2.5 •  Fetch data from an API Retrofit v2.1 •  Parse JSON Gson v2.7 •  Persist data to storage Realm v1.1
69. @lalongooo lalongooo.com Thanks