Android - dev:mobile

Tackling


Android
Fragmentation

Dev
:
Mobile

2012 @
Glennbech

, Inmeta
consulting

16
klocs

–

not rocket
science

Source:
Twitter

/
http
://en.wikipedia.org/wiki/Mobile_operating_system#Market_share

Nairobi

HTC 3G
SLIDE

On sale

May 2010

Got
Gingerbread

May 2011

Android

•
ICS 7.3% (All
versions
)

•
Honeycomb

2.7%

•
Gingerbread

(2.3) dominant @
65%

•
Froyo

(2.2) still at 19.1 %

•
As
of

February

2012 Phones
with

no

ICS
upgrade

plan still sold

•
This
will

continue



iOS

•
61%
on

iOS

5 or
above

in 15.
days
!

Source:
http://developer.android.com/resources/dashboard/platform
-
versions.html

WHO
CARES?



«Prove
that

it is
feasable
, and not
overly

difficult

to,
write

single APK,
native
android

apps

that

works

well

across

android

versions

and form
factors
»

ICS/

Honeycomb

tabs

ActionBar

& Home

Navigation

Action
Items

ViewPager

https://play.google.com/store/apps/details?id=com.glennbech.nutrinfo

Contextual

Actionbar

https://play.google.com/store/apps/details?id=com.glennbech.nutrinfo

Tab
N
avigation

…
with

ListView

multiselect

https://play.google.com/store/apps/details?id=com.glennbech.nutrinfo

Android

•
ICS 7.3% (All
versions
)

•
Honeycomb

2.7%

•
Gingerbread

(2.3) dominant @
65%

•
Froyo

(2.2) still at 19.1 %

•
As
of

February

2012 Phones
with

no

ICS
upgrade

plan still sold

•
This
will

continue



iOS

•
61%
on

iOS

5 or
above

in 15.
days
!

Source:
http://developer.android.com/resources/dashboard/platform
-
versions.html

<
uses
-
sdk
android
:
minSdkVersion
=”7"

android
:
targetSdkVersion
="
14”

/>

public

class

TargetSDKVersionExample

extends

Activity
{


public

void

onCreate
(Bundle
savedInstanceState
) {


super.onCreate
(
savedInstanceState
);


}



@
Override


public

boolean

onCreateOptionsMenu
(Menu
menu
) {


MenuInflater

inflater =
getMenuInflater
();


inflater.inflate
(
R.menu.menu
,
menu
);


return

true
;


}

}

<
menu

>


<
item
android:id
="@+
id/
menu_save
«



android:icon
="@
drawable
/
ic_menu_save
"


android:title
="@
string
/
menu_save
"



android:showAsAction
="
ifRoom|withText
" />

</
menu
>

ICS

Gingrerbread

<
uses
-
sdk
android
:
minSdkVersion
=”
7
"

android
:
targetSdkVersion
="10”

/>

ICS

Gingrerbread

•
Official

Android 3 & 4
features

backported

•
Very

simple to
use
;
download

using

SDK manager and
include

JAR file in
project

Includes


•
Fragment API &
DialogFragment

•
Loader

API

•
ViewPager
,
Pager

Adapter &
FragmentPagerAdapter

•
SearchView

•
Simple
Actionbar

implementation

provided

in samples


source
:
http://developer.android.com/sdk/compatibility
-
library.html#SettingUp


•
No action bar

•
Code «
infection
»

•
Cannot

extend

MapActivity

since

you

have to

extends

custom

Activity
class


•
Written by Jake
Whorton

•
Easy
to
use (
git

clone)

•
Includes & based on support libraries

•
Elaborate. Support for wide range of
Honeycomb and ICS features

•
Actionbar

•
Navigation
Modes, Tabs and spinners in
the action bar
.

•
Contextual
Action Bar
/
ActionMode


The ICS feature "
split action
bar“


•
Plugin

for
MapActvity

(!)

•
www.actionbarsherlock.com

•
Apache License Version
2.0







•
We

have used
the

support
libraries
,
through

ActionBarSherlock

to
get

ICS
looking

apps

on

pre
-
ICS
phones

(back to 1.6
supported
)

•
The
price

•
Must
use

a
custom

theme

•
Must
extends

SherlockActivity

classes

•
Must
use

overloaded

methods
, and
use

getSuppportMenuInflater
()
etc.

WHAT

•
Introduced

in Android 3.0

•
Reusable

UI
components

•
Have
their

own

lifecycle

•
Can

add

their

own

items

to
actionbar

etc.

WHY

•
Code Reuse

•
Fragments
are

integrated

into

the

ICS SDK


http://developer.android.com/guide/topics/fundamentals/fragments.html

Actionbar

uses

TabListeners

for
tab
navigation

onTabSelected
(
ActionBar.Tab

tab,
FragmentTransaction

ft
)

Source:
http://developer.android.com/reference/android/app/ActionBar.TabListener.html

•
Declared in layout

•
Added/removed from code using
FragmentManager



HTC
Sensation

Button

(100dpx

100dp)

Samsung Galaxy Tab 10.1

Huawei

IDEOS

•
xlarge

screens are at least 960dp x 720dp.

•
large screens are at least 640dp x 480dp.

•
normal screens are at least 470dp x 320dp.

•
small screens are at least 426dp x
320dp

•
Excellent

support for

providing
resources

based

on

device

configuration

•
V
ersions

•
mcc310
-
mnc004

(US/Verizon)

•
Car
/desk (
docking
)

•
Night

mode

•
ETC



Source:
http://developer.android.com/guide/topics/resources/providing
-
resources.html


•
Provide

differnet

layout for different screens and
orientations

-

backed

by
the

same
activity



•
Provide

a different Activity
class

for a different
device
/layout.
E
xample

one

for
phone

and
one

for
tablet



Dispatch

Activity
(
condition
)

Phone

Activity

Tablet

Activity

Intent

New
Intent

New
Intent

•
The Android OS and
devices

are

both

forward
-

and
backwards

compatible

in
regard

to OS
versions

•
Android has
excellent

support for layout
on

devices

with

different screen
sizes

and
densities

•
By
using

the

ActionbarSherlock
/Fragment
activities

you

can

write

code

that

use

fragments and
deploy

on

tablets

and
phones

•
By
using

ActionbarSherlock

you

can

get

the

«ICS
look
»
on

your

Android 1.X +
devices

today
.
Including

the

kindle

fire.



“I
am an old man and have
known a great many troubles,
but most of them never
happened”
–

Mark Twain