Showing posts with label Android. Show all posts
Showing posts with label Android. Show all posts

Wednesday, June 6, 2012

Samsung Galaxy S III

Key Features

  • 4.8in, 720 x 1280 pixel display
  • Quad Core 1.4GHz CPU
  • 8MP camera with 1080p video
  • Android 4.0 ICS with TouchWiz

Samsung Galaxy S3 - Design and Build

You might say the Samsung Galaxy S3 has been highly anticipated. You also might say Jesus seemed like quite a nice guy…
Few products in recent years that haven't had a bitten Apple logo somewhere upon their chassis have garnered as much attention as the Galaxy S3. After the huge success of the Galaxy S2 last year it is this follow up that many people have expected to again be the flag bearer for Android smartphones. But has Samsung succeeded? Is the S3 the pinnacle of Android smartphones, and indeed of mobile phones in general? Lets find out.

Design and Build

Anyone that's already familiar with the S3 will know that its design and build has courted controversy. Eschewing the premium feeling materials of the iPhone 4S or HTC One X, it uses a glossy plastic back which, although by no means inherently budget, is a finish more associated with cheaper handsets.


Does this inherently make it undesirable? No, it certainly doesn't go that far, and indeed if you put it next to the Sony Xperia S it really shows just how much Sony slipped up on that design, but next to an iPhone 4S or HTC One X it's these two that give off the stronger whiff of craftsmanship.



In practical terms there are a few genuine issues too. While the polycarbonate that the backplate is made from is very tough due to its pliability, it isn't very scratch resistant, even with an extra scratch resistant coating – either the matt finish of the HTC One X of Xperia S, or glass of the iPhone 4S will standup to more punishment. That said, it should be relatively inexpensive to get replacement backs, and given that it's a single piece that covers the entire back, this will make your phone scratch-free in one fell swoop. Samsung's choice of finishes – glossy white (Marble White) and faux brushed metallic blue (Pebble Blue) should wear any scratches reasonably well too. That said, we're actually not fans of the styling of the blue version – pretend metal just isn't cool – so it's just as well that's the version that has been delayed.



The other potential issue is that, particularly given this is such a large and thin phone, it could succumb to being crushed. Particularly we're thinking in comparison to the iPhone 4S and its tough steel sides here. That phone can take a right squishing and squashing when in a pocket whereas we'd be a little more wary of cracking this phone's screen if crouching down or some such. Then again, this could equally apply to many other large, thin phones and we pretty sure you'd have to be rather unlucky for it to actually happen.

Moving on from the plastic back, we have few complaints about the rest of the design. The smooth glass face with its tapered edges, the tidy silver plastic
trim (real metal would again have been nice) and single central home button combine to create a tidy, premium look and feel. The screen is also Gorilla Glass 2 so should be very scratch and impact resistant.


What's more, pop that battery cover off and you're into a whole world of goodness. There's a microSD slot that'll take cards up to 64GB in size, potentially giving you up to 128GB of storage if you opt for the version with 64GB of built in memory.
You also get a large 2100mAh battery that not only can you swap out for a spare when needed but also in the future you may be able to get extended batteries that last longer on a single charge. While the SIM slot may look large, like the iPhone 4S and HTC One X, it actually houses a microSIM. One counterpoint to the removable battery is that you can't hot-swap SIM cards like on the One X.
Also under here, to the left of the battery, are two gold contacts. These are for a future wireless charging backplate and dock that will allow you to simply place your phone on its dock to charge it, without the need to plug in. Its technology we first saw built into a phone on the Palm Pre, and we think it's downright brilliant. Sadly the required accessories are delayed for several months.

Source : Samsung Galaxy S III

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Monday, March 14, 2011

What is "Android" ?




Android is a Linux-based operating system for mobile devices such as smartphones and tablet computers. It is developed by the Open Handset Alliance, led by Google, and other companies.
Google purchased the initial developer of the software, Android Inc., in 2005. The unveiling of the Android distribution in 2007 was announced with the founding of the Open Handset Alliance, a consortium of 86 hardware, software, and telecommunication companies devoted to advancing open standards for mobile devices. Google releases the Android code as open-source, under the Apache License. The Android Open Source Project (AOSP) is tasked with the maintenance and further development of Android.
Android has a large community of developers writing applications ("apps") that extend the functionality of the devices. Developers write primarily in a customized version of Java. Apps can be downloaded from third-party sites or through online stores such as Google Play (formerly Android Market), the app store run by Google. In October 2011, there were more than 500,000 apps available for Android, and the estimated number of applications downloaded from the Android Market as of December 2011 exceeded 10 billion.
Android was listed as the best-selling smartphone platform worldwide in Q4 2010 by Canalys with over 300 million Android devices in use by February 2012. According to Google's Andy Rubin, as of December 2011, there were over 700,000 Android devices activated every day.
Android consists of a kernel based on the Linux kernel, with middleware, libraries and APIs written in C and application software running on an application framework which includes Java-compatible libraries based on Apache Harmony. Android uses the Dalvik virtual machine with just-in-time compilation to run Dalvik dex-code (Dalvik Executable), which is usually translated from Java bytecode.
The main hardware platform for Android is the ARM architecture. There is support for x86 from the Android x86 project, and Google TV uses a special x86 version of Android.

Linux
Android's kernel is based on the Linux kernel and has further architecture changes by Google outside the typical Linux kernel development cycle. Android does not have a native X Window System nor does it support the full set of standard GNU libraries, and this makes it difficult to port existing Linux applications or libraries to Android.
Certain features that Google contributed back to the Linux kernel, notably a power management feature called wakelocks, were rejected by mainline kernel developers, partly because kernel maintainers felt that Google did not show any intent to maintain their own code. Even though Google announced in April 2010 that they would hire two employees to work with the Linux kernel community, Greg Kroah-Hartman, the current Linux kernel maintainer for the -stable branch, said in December 2010 that he was concerned that Google was no longer trying to get their code changes included in mainstream Linux. Some Google Android developers hinted that "the Android team was getting fed up with the process", because they were a small team and had more urgent work to do on Android.
However, in September 2010, Linux kernel developer Rafael J. Wysocki added a patch that improved the mainline Linux wakeup events framework. He said that Android device drivers that use wakelocks can now be easily merged into mainline Linux, but that Android's opportunistic suspend features should not be included in the mainline kernel. In August 2011, Linus Torvalds said that "eventually Android and Linux would come back to a common kernel, but it will probably not be for four to five years".
In December 2011, Greg Kroah-Hartman announced the start of the Android Mainlining Project, which aims to put some Android drivers, patches and features back into the Linux kernel, starting in Linux 3.3.  further integration being expected for Linux Kernel 3.4.

Features
The Android Emulator default home screen (v1.5, also known as "Cupcake")

Current features and specifications:
Handset layouts
The platform is adaptable to larger, VGA, 2D graphics library, 3D graphics library based on OpenGL ES 2.0 specifications, and traditional smartphone layouts.

Storage
        SQLite, a lightweight relational database, is used for data storage purposes.

Connectivity
        Android supports connectivity technologies including GSM/EDGE, IDEN, CDMA, EV-DO, UMTS, Bluetooth, Wi-Fi, LTE, NFC and WiMAX.

Messaging
        SMS and MMS are available forms of messaging, including threaded text messaging and now Android Cloud To Device Messaging (C2DM) is also a part of Android Push Messaging service.

Multiple language support
        Android supports multiple languages.

Web browser
        The web browser available in Android is based on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine. The browser scores 100/100 on the Acid3 test on Android 4.0.

Java support
        While most Android applications are written in Java, there is no Java Virtual Machine in the platform and Java byte code is not executed. Java classes are compiled into Dalvik executables and run on Dalvik, a specialized virtual machine designed specifically for Android and optimized for battery-powered mobile devices with limited memory and CPU. J2ME support can be provided via third-party applications.

Media support
        Android supports the following audio/video/still media formats: WebM, H.263, H.264 (in 3GP or MP4 container), MPEG-4 SP, AMR, AMR-WB (in 3GP container), AAC, HE-AAC (in MP4 or 3GP container), MP3, MIDI, Ogg Vorbis, FLAC, WAV, JPEG, PNG, GIF, BMP, WebP.

Streaming media support
        RTP/RTSP streaming (3GPP PSS, ISMA), HTML progressive download (HTML5 <video> tag). Adobe Flash Streaming (RTMP) and HTTP Dynamic Streaming are supported by the Flash plugin. Apple HTTP Live Streaming is supported by RealPlayer for Android, and by the operating system in Android 3.0 (Honeycomb).

Additional hardware support
        Android can use video/still cameras, touchscreens, GPS, accelerometers, gyroscopes, barometers, magnetometers, dedicated gaming controls, proximity and pressure sensors, thermometers, accelerated 2D bit blits (with hardware orientation, scaling, pixel format conversion) and accelerated 3D graphics.

Multi-touch
        Android has native support for multi-touch which was initially made available in handsets such as the HTC Hero. The feature was originally disabled at the kernel level (possibly to avoid infringing Apple's patents on touch-screen technology at the time).[64] Google has since released an update for the Nexus One and the Motorola Droid which enables multi-touch natively.

Bluetooth
        Supports A2DP, AVRCP, sending files (OPP), accessing the phone book (PBAP), voice dialing and sending contacts between phones. Keyboard, mouse and joystick (HID) support is available in Android 3.1+, and in earlier versions through manufacturer customizations and third-party applications.

Video calling
        Android does not support native video calling, but some handsets have a customized version of the operating system that supports it, either via the UMTS network (like the Samsung Galaxy S) or over IP. Video calling through Google Talk is available in Android 2.3.4 and later. Gingerbread allows Nexus S to place Internet calls with a SIP account. This allows for enhanced VoIP dialing to other SIP accounts and even phone numbers. Skype 2.1 offers video calling in Android 2.3, including front camera support.

Multitasking
        Multitasking of applications, with unique handling of memory allocation, is available.

Voice based features
        Google search through voice has been available since initial release. Voice actions for calling, texting, navigation, etc. are supported on Android 2.2 onwards.

Tethering
        Android supports tethering, which allows a phone to be used as a wireless/wired Wi-Fi hotspot. Before Android 2.2 this was supported by third-party applications or manufacturer customizations.

Screen capture
        Android supports capturing a screenshot by pressing the power and volume-down buttons at the same time. Prior to Android 4.0, the only methods of capturing a screenshot were through manufacturer and third-party customizations or otherwise by using a PC connection (DDMS developer's tool). These alternative methods are still available with the latest Android.

External storage
        Most Android devices include microSD slot and can read microSD cards formatted with FAT32, Ext3 or Ext4 file system. To allow use of high-capacity storage media such as USB flash drives and USB HDDs, many Android tablets also include USB 'A' receptacle. Storage formatted with FAT32 is handled by Linux Kernel VFAT driver, while 3rd party solutions are required to handle other popular file systems such as NTFS, HFS Plus and exFAT.



Source : Android (Operating Systems)

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