Developer Tools covered: -> deployment, on smartphone -> debugging, via system messages -> the best practices Namely, popular libraries, naming conventions, and news to keep up to date. The strength of Android is its community, follow it, to adopt its best practices.

1. Developer Tools
macha@CHILLCODING.com
Macha
DA COSTA Web Site
Email

2. Android ANR
! by CHILLCODING with FontAwesome
 #  %

'
> 10 sec.
#

3. Developer Tools
A. Deployment
B. Debugging
C. Best Practices

4. A. Deployment
Become an Android developer
Android Debug Bridge
Emulator
( ) *
* + (
(
*

5. A. Deployment
* + ( Become an Android developer
, Developer Options
Build Number
- , USB Debugging
# #

6. A. Deployment
* + ( Developer Options
. Show layouts bounds
/ Debug GPU overdraw
 Profile GPU rendering
1 Strict mode enabled
2 Don’t keep activities
3 Background process limit

7. A. Deployment
* + ( Developer Options
Show layouts bounds
.
4 Show view elements
(padding, margin, …)

8. A. Deployment
* + ( Developer Options

9. A. Deployment
* + ( Developer Options
Debug GPU overdraw
/
4 Show info to optimize views

10. A. Deployment
* + ( Developer Options
Profile GPU rendering

4 Show the GPU

11. A. Deployment
* + ( Developer Options

12. A. Deployment
* + ( Developer Options
Strict mode enabled
1
4 Show a red square if the mainThread is blocked

13. A. Deployment
* + ( Developer Options
Don’t keep activities
2
4 Keep one Activity at a time

14. A. Deployment
* + ( Developer Options
Background process limit
3
4 Define process nb to keep

15. 5 * List devices
6 * Connect to a device
7 8 * Install an app
* 2 7 Uninstall an app
9 8 * Copy files
A. Deployment
( ) * Android Debug Bridge

16. List devices
5 *
: ./adb devices
A. Deployment
( ) * Android Debug Bridge

17. Connect to a device
6 *
: ./adb shell
: ./adb -s nexus_06 shell
A. Deployment
( ) * Android Debug Bridge

18. Install an app
78 *
: ./adb install
: ./adb -s nexus_06 install
A. Deployment
( ) * Android Debug Bridge

19. Uninstall an app
* 2 7
: ./adb uninstall
: ./adb -s nexus_06 uninstall
A. Deployment
( ) * Android Debug Bridge

20. Copy files
( 8 9 8 *
: ./adb pull /sdcard/myFile myFile
A. Deployment
( ) * Android Debug Bridge

21. Copy files
* 8 98 (
: ./adb push myFile /sdcard/myFile
A. Deployment
( ) * Android Debug Bridge

22. A. Deployment
( Emulator
*
; Android Device Monitor

23. A. Deployment
< Call
= Message
> GPS position
( Emulator
*

24. A. Deployment
Call
<
; Telephony Actions
( Emulator
*

25. A. Deployment
Message
=
; Telephony Actions
( Emulator
*

26. A. Deployment
GPS Position
>
; Location Controls
( Emulator
*

27. B. Debugging
? System Message
@ Debug resources
@ Debug step to step
; Android Lint

28. B. Debugging
? System Message
A Logcat Console
@ Message Types
B Use of Android Log

29. B. Debugging
? Logcat Console
* C * C * C * C * C

30. B. Debugging
? Logcat Console
C

C

C
F
C
G
C
H

31. B. Debugging
? Logcat Console
C

C

C
F
C
G
C
H

32. B. Debugging
? Logcat Console
C

C

C

C


33. B. Debugging
? Logcat Console
I Tag

34. B. Debugging
? Logcat Console
I Id

35. B. Debugging
? Logcat Console
C

C

C
F
C
G
C
H
A

36. B. Debugging
? Logcat Console
C

C

C
F
C
G
C
H
J
K

37. B. Debugging
@ Message Types
: I’m Information :)

38. B. Debugging
@ Message Types
: Me it’s Verbalisation :/

39. B. Debugging
@ Message Types
: I serve to Debug ;)

40. B. Debugging
@ Message Types
: Warning: But why is he so mean?

41. B. Debugging
@ Message Types
: Because, there is Error!

42. B. Debugging
B Use of Android Log
Log.e(String tag, String message, Throwable tr)

43. B. Debugging
B Use of Android Log
Log.e(TAG,”Error!")
TAG = "HomeActivity"

44. B. Debugging
B Use of Android Log
Log.i( MainActivity::class.simpleName,"I am I :)")

45. B. Debugging
@ Debug resources
L Build > Clean
L File > Invalidate Caches / Restart …
M Run: Compilation Error
N Error in Kotlin files
N Error message window
A Look for the fake resource
A Look for the wrong XML attribute

46. B. Debugging
@ Debug step to step
OBreak points
AVariable state
x

47. B. Debugging
@ Debug step to step
M Run: Runtime Error
N Error in Logcat console
N Debug Debug console

48. B. Debugging
@ Debug step to step
M + @ | M 8 @

49. B. Debugging
@ Debug step to step
P Place break point
@ Launch the debugger
N Zoom on Debug console
_ Go to next break point
_ Go to the next line
_ Go to the next line inside code
_ Observe a variable
_ Execute flying code
A
Q
Q
M
R

50. B. Debugging
; Android Lint
S + B
A
T
U

51. B. Debugging
; Android Lint
S
B
U
A

52. B. Debugging
; Android Lint
S
+Unused resources
+Non-internationalized resources
+Use of unsupported APIs
+etc

53. C. Best Practices
V Libraries
U Test
U Naming Convention

54. C. Best Practices
V Libraries
J Import an Android code sample
V Most popular Android libraries
W Influencers

55. J Import an Android code sample
C. Best Practices

56. V Most popular Android libraries
C. Best Practices
Retrofit

57. V Most popular Android libraries
C. Best Practices
https://github.com/Dimezis/RxBus

58. V Most popular Android libraries
C. Best Practices
Room


59. V Most popular Android libraries
C. Best Practices
Picasso


60. V Most popular Android libraries
C. Best Practices

61. V Most popular Android libraries
C. Best Practices
B How to import
dependencies {
implementation 'de.greenrobot:eventbus:2.4.0'
U Gradle

62. W Influencers
C. Best Practices
X
F Y W

63. W Influencers
C. Best Practices
F
Android developers
Android dialogs

64. W References
C. Best Practices
Y
https://developer.android.com
http://android-arsenal.com/

65. W Conferences
C. Best Practices
W
Google I/O
Android Makers
DroidCon

66. W Influencers
C. Best Practices
X
@Google Developer Expert

67. C. Best Practices
Android v?

68. C. Best Practices
1 Manage =/= Versions
*
;
4.4
*
;
5.1
*
;
7.0

69. C. Best Practices
U Test
U Unit Tests
( Monkey Stress Test

70. C. Best Practices
U Unit Tests
package (androidTest)
+
B ActivityInstrumentationTestCase2

71. C. Best Practices
U Unit Tests
com.chillcoding.home (androidTest)
L (droit) Run > All tests

72. C. Best Practices
U Unit Tests
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
...
testCompile 'junit:junit:4.12'
}
B gradle
Reference [Android]: Expresso

73. C. Best Practices
U Unit Tests
public class HomeActivityTest extends ActivityInstrumentationTestCase2<HomeActivity> {
public HomeActivityTest()
@Override
protected void setUp() throws Exception
public void testPreconditions()
public void testText()

74. C. Best Practices
U Unit Tests
public class HomeActivityTest extends ActivityInstrumentationTestCase2<HomeActivity> {
public HomeActivityTest() {
super(HomeActivityTest.class);
4 Initialize the class

75. C. Best Practices
U Unit Tests
public class HomeActivityTest extends ActivityInstrumentationTestCase2<HomeActivity> {
@Override
protected void setUp() throws Exception {
super.setup();
4 Initialize test environment

76. C. Best Practices
U Unit Tests
public class HomeActivityTest extends ActivityInstrumentationTestCase2<HomeActivity> {
public void testPreconditions()
4 Check pre-conditions

77. C. Best Practices
U Unit Tests
public class HomeActivityTest extends ActivityInstrumentationTestCase2<HomeActivity> {
public void testText()
4 Do the test

78. Random tests
Z
: ./adb shell monkey -p com.chillcoding.mycuteheart -v 500
C. Best Practices
( Monkey Stress Test
4 500 random evts

79. C. Best Practices
U Naming Convention
U Naming Convention
U Naming Convention
( Shortcuts

80. ClassName: UpperCamelCase
variableName: camelCase
CONSTANT: UPPER_CASE
resource_file: snake_case
idUIItem
id_string
C. Best Practices
U Naming Convention

81. Legend:
L Click
L Enter Key
L Control Key
L Command Key
L Shift Key
L Option or Alt Key
C. Best Practices
( Shortcuts
Alt
Ctrl
⌘
L

82. C. Best Practices
( Shortcuts
Alt Solve any pb.
⌘ Alt L Indent code
Valid proposal of AS
Ctrl L Go to class / file
See the documentation
Rename a variable, a file
Generate super classe fun
F6
⌘ N
Ctrl Q / F1
Look for something into the project
Ctrl / Comment
Ctrl
Ctrl
Y
D
Delete a line
Duplicate a ligne or a selection
Ctrl O Override a method

83. IF YOU THINK
YOU ARE TOO
SMALL
TO MAKE A
DIFFERENCE
TRY SLEEPING
WITH A MOSQUITO.
_ African Proverb

84. References
• Quizz Outils du Développeur Android
• ChillCoding: Android references
• Udacity: Android Development for Beginners (Video)
• Developer Android: Application Fundamentals (API Guide)
• Edition Eni : Android 5 Les fondamentaux du développement d'applications Java (Livre)
• Improve Your Code with Lint
• TDD in Android Kotlin
• Must Have Libraries
• wasabeef: Awesome android ui
• https://www.raywenderlich.com/category/android
• Jakewharton: Just say no to hungarian notation
• https://medium.com/ekohe/how-to-write-good-code-an-introduction-to-sandi-metz-s-rules-89bb3d749d53
• https://choosealicense.com/
• https://github.com/ribot/android-guidelines/blob/master/project_and_code_guidelines.md
• https://developer.android.com/kotlin/style-guide
• https://kotlinlang.org/docs/reference/coding-conventions.html

85. [ macha@chillcoding.com
X @MachaDaCosta
ChillCoding
] @chillcoding
Questions?
Kotlin for Android
By Da Costa On