Saturday, 31 August 2013

What are Android Support Libraries & Differnces

Android Support Libraries

What are these??
For Supporting the old versions with new code. in layman it like new versions are giving their functionality to old versions.

It will help coders to create code with new functionality (that is not present in old versions) for devices with older versions as well.

There are 3 main support versions for android libraries - V4, V7 ,V13
So you can say these libraries are there to help backward compatible.
Version 7 isn't used that much and was specifically for Grid Layout

Version4	Version 7	Version 13
This library is designed to be used with Android 1.6 (API level 4) and higher.	There are several libraries designed to be used with Android 2.1 (API level 7) and higher	This library is designed to be used for Android 3.2 (API level 13) and higher
The main features here are backwards-compatible versions of `FragmentManager` and `LoaderManager`. click here for more info	This library adds support for the Action Bar user interface design pattern.	Classes FragmentPagerAdapter FragmentTabHost FragmentStatePagerAdapter FragmentCompat
This library is designed to be used with Android 1.6 (API level 4) and higher.	his library is located in the `<sdk>/extras/android/support/v7/appcompat/`	This library is located in the `<sdk>/extras/android/support/v13/`
follow the instructions for adding libraries without resources.	instructions for adding libraries with resources.	To include it in your application project, follow the instructions for adding libraries without resources.

How to download Suppot libraies??
Right clicl your project in eclipse >select Android Tools> then click Add Compatibility Library.
then-

Other way to download
Eclipse -> Window -> Android SDK and AVD Manager -> Available Packages -> Download the compatibility library v4.

Adding to project:

Project Menu > Properties > Java Build Path > libraries tab >Add external Jars
Done.

Thursday, 1 August 2013

Testing: Inspection vs WalkThrough

Testing: Inspection vs WalkThrough

Inspection: Inspect the code in planned meeting to verify the standard compliance
Walk through of software product is a general/informal discussion with peers/colleagues to find issues/suggestions

Inspection	Walkthrough
Formal / disciplined practice / Planned meeting	Informal / no prep required / informal meeting with peers,collegues
Used to verify the compliance of the product with specified standards	Used to find any suggestions/improvements issues in the software
Initiated by the project team	Initiated by the author(developer)
Reader reads the product code. Everyone inspects it and comes up with defects.	We read the product code and our team mate comes up with defects or suggestions

Friday, 12 July 2013

Radio ROM vs Android ROM

Radio ROM vs Andriod ROM

Radio ROM	Android ROM (or the ROM)
In HTC Android phones the software that accesses the telephone electronics is called the Radio ROM.	The Android ROM is the Android operating system.
It is separate from the Android operating system	The Android ROM is the Android operating system.
The operating system access the telephone hardware via the Radio ROM.	This is the User interface (Sense UI in HTC phones) and the file system for maintaining contacts etc.
The Radio ROM may be updated independently of the Android operating system.	It is composed of a Linux kernel and various add-ons to achieve specific functionality.

Wednesday, 8 May 2013

Difference between Units of Digital Information

bit vs byte vs nibble

1 bit = 1 or 0

1 byte = 8 bits

1 Nibble = 4 bits (semi- octet)

Kilobit vs Kibibit

1 kilobit = 10³bits = 1000 bits.	1 kibibit = 2¹⁰ bits = 1024 bits
Symbol = kbit or kb	Symbol = Kibit or Kib
KiloByte Symbol = KB	KibiByte Symbol = KiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

Megabit vs Mebibit

1 megabit = 10⁶bits = 1000000bits = 1000 kilobits.	1 mebibit = 2²⁰ bits = 1048576 bits = 1024 kibibits
Symbol = Mbit or Mb	Symbol = Mibit or Mib
MegaByte Symbol = MB	MebiByte Symbol = MiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

Gigabit vs Gibibit

1 gigabit = 10⁹bits = 1000000000 bits.	1 gibibit = 2³⁰ bits = 1073741824 bits = 1,024 mebibits
Symbol = Gbit or Gb	Symbol = Gibit or Gib
GigaByte Symbol = GB	GibiByte Symbol = GiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

Terabit vs Tebibit

1 terabit = 10¹²bits = 1000000000000bits = 1000 Gb	1 tebibit = 2⁴⁰ bits = 1099511627776bits = 1024 Gibit
Symbol = Tbit or Tb	Symbol = Tibit or Tib
TeraByte Symbol = TB	TebiByte Symbol = TiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

Petabit vs Pebibit

1 petabit = 10¹⁵bits = 1000000000000000bits = 1000 terabits.	1 pebibit = 2⁵⁰ bits = 1125899906842624bits = 1024 tebibits
Symbol = Pbit or Pb	Symbol = Pibit or Pib
PetaByte Symbol = PB	PebiByte Symbol = PiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

Exabit vs Exbibit

1 exabit = 10¹⁸bits = 1000000000000000000bits = 1000 petabits	1 exbibit = 2⁶⁰ bits = 1152921504606846976bits = 1024 pebibits
Symbol = Ebit or Eb	Symbol = Eibit or Eib
ExaByte Symbol = EB	ExbiByte Symbol = EiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

zettabit vs zebibit

1 zettabit = 10²¹bits = 1000000000000000000000 bits = 1000 exabits.	1 zebibit = 2⁷⁰ bits = 1180591620717411303424 bits = 1024 exbibits
Symbol = Zbit or Zb	Symbol = Zibit or Zib
Zettabyte Symbol = ZB	ZebiByte Symbol = ZiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

yottabit vs yobibit

1 yottabit = 10²⁴bits = 1000000000000000000000000bits = 1000 zettabits.	1 yobibit = 2⁸⁰ bits = 1208925819614629174706176 bits = 1024 zebibits
Symbol = Ybit or Yb	Symbol = Yibit or Yib
YottaByte Symbol = YB	YottaByte Symbol = YiB
SI standard ( International System of Units)	IEC standard (International Electrotechnical Commission)

UEFI VS BIOS

BIOS or UEFI are interface which sits between OS and Firmware

UEFI = Unified Extensible Firmware Interface
BIOS = Basic Input/Output System
Firmware : it is "Software for hardware". A firmware is a software which communicates directly with hardware. Whereas Other softwares like OS and Application uses it for accessing input/output from hardware.

UEFI	BIOS

Advanced GUI Based /Mouse supported	Basic GUI support /keyboard Supported
Secure Boot	--
Processor independent	Specific to x86 Processor
Works with GUID partition Table (GPT)	Works with MBR
Max Disk Size Supported = 8 ZiB (ZebiBytes)	Max Disk Size Supported= 2TiB (TebiBytes)
Faster in Response	--

Secure boot : It’s a kind of lock in that will not allow other (unsigned) OS to be loaded on the machine. Supported by Win8,2012, some linux distributions. We need to disable it to load other OS.
MBR: Master boot record
1 TiB = Tebi Byte (2⁴⁰ bytes)
1 zebibyte = 2⁷⁰ bytes

More to come

Steps to open BIOS /UEFI on your system

Bytes Table

Using UEFI to boot

Installing Linux on UEFI

More info on UEFI : http://www.uefi.org/about/