What Is Different Between Android And Ios

By Author: Emilia Rakel
Total Articles: 42
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First tackle those security features where both mobile operating systems are on par with each other. Both iOS and Android have traditional access control. It is a method where users access the device to unlock the phone through such means as typing a password, following a pattern, and sliding to unlock.

The next layer above the kernel contains the Android native libraries. These shared libraries are all written in C or C++, compiled for the particular hardware architecture used by the phone, and preinstalled by the phone vendor. Some of the most important native libraries include the following:

• Surface Manager: Android uses a compositing window manager
similar to Vista or Compiz, but it’s much simpler. Instead of drawing directly to the screen buffer, your drawing commands go into
offscreen bitmaps that are then combined with other bitmaps to form the display the user sees. This lets the system create all
sorts of interesting effects such as see-through windows and fancy transitions.

• 2D and 3D graphics:
Two- and three-dimensional elements can be combined in a single ...
... user interface with Android. The library will use 3D hardware if the device has it or a fast software renderer if it doesn’t. See Chapter 4, Exploring 2D Graphics, on page 71 and Chapter 10, 3D Graphics in OpenGL, on page 193. • Media codecs: Android can play video and record and play back audio in a variety of formats including AAC, AVC (H.264), H.263, MP3, and MPEG-4. See Chapter 5, Multimedia, on page 102 for an example.

• SQL database:
Android includes the lightweight SQLite database engine, 2 the same database used in Firefox and the Apple iPhone. You can use this for persistent storage in your application. See Chapter 9, Putting SQL to Work, on page 173 for an example. • Browser engine: For the fast display of HTML content, Android uses the WebKit library. 3 This is the same engine used in the Google Chrome browser, Apple’s Safari browser, the Apple iPhone, and Nokia’s S60 platform. See Chapter 7, The Connected World, on page 128 for an example.

Android Runtime
Also sitting on top of the kernel is the Android runtime, including the Dalvik virtual machine and the core Java libraries. The Dalvik VM is Google’s implementation of Java, optimized for mobile devices. All the code you write for Android will be written in Java and run within the VM.
Resource: http://whatisandroid.me