Offline mode in Android apps

Slide 1

Slide 1 text

! Jerzy Chalupski chalup, futuresimple " jerzy.chalupski@gmail.com Offline mode in Android apps Base CRM http://porcupineprogrammer.blogspot.com/ #

Slide 2

Slide 2 text

WHAT WHY HOW

Slide 3

Slide 3 text

WHAT is offline mode?

Slide 4

Slide 4 text

What happens when you send and email from Gmail app?

Slide 5

Slide 5 text

What happens if your connection is down?

Slide 6

Slide 6 text

What happens if your connection is down?

Slide 7

Slide 7 text

No content

Slide 8

Slide 8 text

RECAP Offline mode = fully functional app without connection

Slide 9

Slide 9 text

WHY should I bother?

Slide 10

Slide 10 text

Life is too short to worry about the internet connection.

Slide 11

Slide 11 text

I had to watch the animated circle for 2 seconds.

Slide 12

Slide 12 text

They want to post the photos of their dinner on Instagram! People want to DO THINGS!

Slide 13

Slide 13 text

SLOOOOOOW TIMEOUTS RETRYS NETWORK ERRORS HANDLING LIT SCREEN DATA PLAN USAGE

Slide 14

Slide 14 text

ˑˑˑˑ˒ “Unbearably sloooooow.”

Slide 15

Slide 15 text

ˑˑˑˑ˒ “Drains my battery.”

Slide 16

Slide 16 text

ˑˑˑˑ˒ “Crashes all the time.”

Slide 17

Slide 17 text

No content

Slide 18

Slide 18 text

RECAP BETTER UX

Slide 19

Slide 19 text

RECAP BETTER UX BETTER BATTERY LIFE

Slide 20

Slide 20 text

RECAP BETTER UX BETTER BATTERY LIFE BETTER CODE

Slide 21

Slide 21 text

RECAP BETTER UX BETTER BATTERY LIFE BETTER CODE

Slide 22

Slide 22 text

HOW do I implement it?

Slide 23

Slide 23 text

UI Http Client

Slide 24

Slide 24 text

UI Http Client SLOW FLAKY

Slide 25

Slide 25 text

UI Http Client SLOW FLAKY CACHE ALL THE THINGS!

Slide 26

Slide 26 text

Http Client SLOW FLAKY Storage FAST RELIABLE UI

Slide 27

Slide 27 text

Storage Http Client SLOW FLAKY UI FAST RELIABLE GET

Slide 28

Slide 28 text

Http Client SLOW FLAKY Storage FAST RELIABLE UI GET POST

Slide 29

Slide 29 text

Sync Service Http Client UI Storage GET POST

Slide 30

Slide 30 text

AbstractThreadedSyncAdapter Http Client UI ContentProvider SQLite DB CursorLoader

Slide 31

Slide 31 text

Sync Service Http Client UI Storage

Slide 32

Slide 32 text

Sync Service Http Client UI Storage

Slide 33

Slide 33 text

Sync Service Http Client UI Storage

Slide 34

Slide 34 text

BACKEND MOBILE

Slide 35

Slide 35 text

BACKEND MOBILE

Slide 36

Slide 36 text

BACKEND MOBILE

Slide 37

Slide 37 text

BACKEND MOBILE

Slide 38

Slide 38 text

BACKEND MOBILE

Slide 39

Slide 39 text

BACKEND MOBILE

Slide 40

Slide 40 text

BACKEND MOBILE

Slide 41

Slide 41 text

BACKEND MOBILE

Slide 42

Slide 42 text

BACKEND MOBILE

Slide 43

Slide 43 text

BACKEND MOBILE

Slide 44

Slide 44 text

BACKEND MOBILE

Slide 45

Slide 45 text

BACKEND MOBILE

Slide 46

Slide 46 text

BACKEND MOBILE 250k items?

Slide 47

Slide 47 text

BACKEND MOBILE ?

Slide 48

Slide 48 text

BACKEND MOBILE

Slide 49

Slide 49 text

BACKEND MOBILE

Slide 50

Slide 50 text

BACKEND MOBILE OFFLINE MODE = DATA MIGRATIONS

Slide 51

Slide 51 text

As pleasant as data migrations with SQLiteOpenHelper.

Slide 52

Slide 52 text

BACKEND MOBILE 1 2 1 2

Slide 53

Slide 53 text

BACKEND MOBILE 1 2 1 2 3

Slide 54

Slide 54 text

BACKEND MOBILE 1 2 1 2 3 3

Slide 55

Slide 55 text

BACKEND MOBILE 1 2 1 2 3 3 3

Slide 56

Slide 56 text

BACKEND MOBILE 1 2 1 2 3 3 3

Slide 57

Slide 57 text

BACKEND MOBILE 1A 2B 1 2

Slide 58

Slide 58 text

BACKEND MOBILE 1A 2B 1 2 3

Slide 59

Slide 59 text

BACKEND MOBILE 1A 2B 1 2 3 C

Slide 60

Slide 60 text

BACKEND MOBILE 1A 2B 1 2 3 C C

Slide 61

Slide 61 text

BACKEND MOBILE 1A 2B 1 2 3 C 4C C

Slide 62

Slide 62 text

BACKEND MOBILE 1A 2B 1 2 3 C 4 3 4C

Slide 63

Slide 63 text

BACKEND MOBILE 1A 2B 1 2 3 4 3 4C

Slide 64

Slide 64 text

BACKEND MOBILE 1A 2B 1 2 3 4 3D 4C

Slide 65

Slide 65 text

BACKEND MOBILE 1A 2B 1 2 2 3C 3

Slide 66

Slide 66 text

BACKEND MOBILE 1A 2B 1 2 2 2 3C 3

Slide 67

Slide 67 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 ?

Slide 68

Slide 68 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D

Slide 69

Slide 69 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D

Slide 70

Slide 70 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D

Slide 71

Slide 71 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D D

Slide 72

Slide 72 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D 4D D

Slide 73

Slide 73 text

BACKEND MOBILE 1A 2B 1 2 2 D 2 3C 3 D 4D 4D

Slide 74

Slide 74 text

4D BACKEND MOBILE 1A 2B 1 2 2 2 3C 3 D 4

Slide 75

Slide 75 text

4D BACKEND MOBILE 1A 2B 1 2 2 2 3C 3 4 4

Slide 76

Slide 76 text

4D BACKEND MOBILE 1A 2B 1 2 2 2 3C 3 4 4

Slide 77

Slide 77 text

“My friend, you’re entering a world of pain” WALTER SOBCHAK

Slide 78

Slide 78 text

UUID

Slide 79

Slide 79 text

RECAP OFFLINE MODE = MIGRATIONS

Slide 80

Slide 80 text

RECAP UUID OR WORLD OF PAIN OFFLINE MODE = MIGRATIONS

Slide 81

Slide 81 text

Sync Service Http Client UI Storage

Slide 82

Slide 82 text

Sync Service Http Client UI Storage

Slide 83

Slide 83 text

“For every complex problem there is an answer that is clear, simple and wrong.” HENRY LOUIS MENCKEN

Slide 84

Slide 84 text

Sync Service Http Client UI Storage CONFLICTS

Slide 85

Slide 85 text

Sync Service Http Client UI Storage CONFLICTS DUPLICATES

Slide 86

Slide 86 text

Sync Service Http Client UI Storage CONFLICTS HANDLING LARGE DATA SETS DUPLICATES

Slide 87

Slide 87 text

Sync Service Http Client UI Storage CONFLICTS HANDLING LARGE DATA SETS DUPLICATES BATTERY USAGE