Presentations text content in Android vs. iPhone Lu Cheng
Slide1
Android vs. iPhone
Lu Cheng
(l2686604)
Slide2Power Consuming Services
Android and iPhone support energy hungry network services
2G/3G: the two-way radio system for long range service.
Frequencies for America: GSM 850, GSM 1900
Frequencies for Europe: GSM 800, GSM 1800
Wi-Fi: a standard, is a two-way, short range protocol and operates in two bands
Bluetooth: a two-way,
ultrashort
range protocol.
GPS: a one-way system via satellite
Slide3Power Consuming Services
The
most power hungry
network service:
3G radio system
Wi-Fi
2G radio system
Bluetooth
GPS
Slide4Other energy consuming aspect
Large LCD screen
3.7 inch in Droid
3.5 inch in iPhone
Multi-media
Audio & video player
Audio & video recorder
Camera
Slide5Android
Android Power Management Support
On top of the standard Linux Power Management
CPU cannot consume power without applications or services power requirement
Simple power management mechanism
Locks and timer
Support screen on/off, backlight on/off, adjust screen brightness
Slide6Power manager in Android
Change phone’s power usage based on the amount of battery left
Triggers
Plug into A/C adapter, USB charger or USB port
Battery level reaching particular level
Adjustable features based on triggers
Wi-Fi; Bluetooth; GPS;
Awake time; Screen’s brightness,
etc
Slide7iPhone
iPhone don’t have power management toolkit
iPhone supports different mode
Sleep mode
Airline mode
Slide8Battery and Portable Power
USB charge
Car charge
Droid
iPhone
type
lithium-ion
battery
lithium-ion
battery
Remove
Yes
Built-in
inaccessible
Replacement
Yes
No-user replaceable
Standby
Up to 270hr
Up to 277hr
Talk time
327 min
350min
Slide9Power Management strategy
Android and iPhone shares similar power management strategy
Turn off unnecessary application
Charge the cell
phone whenever
you can!!!
Slide10Android
T-mobile G1
One-click Google Search.
Customizable Home screen with instant Email, text message and IM notifications.
Instant access to Google services (Gmail, YouTube, Maps, Google Talk, Calendar).
Slide11System History
Android
2005 July: Google bought Android, Inc. At Google, the team developed a mobile device platform powered by the Linux kernel
2007 November: Google released Android build on the Linux kernel version 2.6
2008 October: Opened Android’s source code.
2009 April: Google released Cupcake with Linux kernel 2.6.27
2009 September: Google released Donut
Slide12System History
iPhone
2007 June: Apple released the initial version of iPhone OS
2007 September: Apple released version 1.0.2 with the iPod
2008 July: Apple released version 2.0 with iPhone 3G
2009 June: Apple released version 3.0 with iPhone 3GS
2010 January: Apple released the latest version 3.2 which support
iPad
Slide13System Architecture
Android
Kernel Linux
Android relies on Linux version 2.6 for core system services
Libraries
Android has a set of C/C++ libraries used by various components of the Android system
These libraries are exposed to developers
Slide14System Architecture
Android
Runtime
Core libraries
Dalvik virtual machine
Application
framwork
All Android applications are written with Java programming language
Offer developers with the ability to build applications
Slide15System Architecture
iPhone
Hardware
Firmware
Processor
iPhone OS
Objective-C Runtime
Objective-C dynamically-linked runtime libraries
Underlying C libraries
Frameworks
Application
Slide16Hardware Comparison
Droid
iPhone
Memory
256MB
168MB
Second Storage
32GB
16GB
Media
Camera;
Audio; Video; Up to 24 fps capture
Camera;
Audio; Video; Up to 27 fps capture
Screen
3.7 inch widescreen
3.5-inch widescreen Multi-Touch display
Battery
1400 Ah Li Ion battery; Up to 270 hours standby time
None
user-replaceable; Up
to 250 hours standby time
Sensor
Proximity; Ambient light; E-Compass
Proximity; Ambient light; 3-axis accelerometer; Moisture; e-Compass
Slide17Memory Management
Android
Handles memory management automatically
Garbage collector destroys the application without active
May cause performance issues(too many allocations; too large allocations)
iPhone
Has no garbage collection
Developer maintain the count number for each object
When count number become 0, destroy the object
NSObject
class helps to keep the track of count number
Slide18Security
Android
Open platform
Allow user load third-party application onto a device.
Enforce security between applications and system at process level
Permission mechanism enforce restriction on specific operations with particular process
iPhone
iPhone has no security software
Third party software is not allowed on the device
Provide
passcode
lock feature
When password failure, perform soft reset, lock the device, unlock with remote unlock service
Slide19
Android vs. iPhone Lu Cheng
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