Android Architecture - Revision history

Const: + Android internals

2011-06-13T15:15:45Z

+ Android internals

2011-05-23T17:52:29Z

‎Overview presentations

2011-01-11T00:00:39Z

‎Overview presentations

2011-01-10T23:57:47Z

2010-07-15T19:40:03Z

‎Java/Object Oriented Philosophy: make a nice box for Dianne's quote

2010-07-15T19:36:18Z

‎Architecture Diagram: add local copy of architecture diagram, and some explanations

2010-07-15T19:29:50Z

2010-04-13T03:37:37Z

Link Gregs presentation

2009-11-05T22:45:54Z

2009-11-05T22:43:34Z

add architecture diagram (link)

← Older revision		Revision as of 15:15, 13 June 2011
Line 10:		Line 10:

	[[image:Android-system-architecture.jpg]]		[[image:Android-system-architecture.jpg]]
		+
		+	See also [http://www.makelinux.net/android/internals/ Android internals diagram]

	Basically Android has the following layers:		Basically Android has the following layers:

@@ Line 21: / Line 21: @@
 == Overview presentations ==
 * See this Android Internals presentation by Karim Yaghmour
 ** http://www.opersys.com/blog/android-internals-101103

@@ Line 25: / Line 25: @@
 ** You'll find both the video and the slides there
 * [[Media:Mythbusters_Android.pdf|Mythbusters_Android.pdf]] Presentation by Matt Porter at ELC Europe
+** Has bits and pieces showing problematic Android code and policies
 == Breakdown of running Android system ==

@@ Line 19: / Line 19: @@
 * the Linux kernel, which includes
 ** drivers for hardware, networking, file system access and inter-process-communication
 == Breakdown of running Android system ==

@@ Line 34: / Line 34: @@
 Dianne Hackborn, one of the principal engineers working on Android, wrote:
-<pre>
+<div style="margin:0; margin-top:10px; margin-right:10px; border:1px solid #CCCC00; padding:0 1em 1em 1em; background-color:#ffffcc; align:right;">
 It's not like I am a C programmer who doesn't like object oriented design. In fact prior to Android my primary language was C++... and honestly, Java really annoys me in the way it introduces so much more overhead to do things that I could express in very nice OO concepts in C++ with a much lighter-weight result.
@@ Line 40: / Line 41: @@
 Finally, going forward, our API conventions were defined in a way that allowed us to ship a well performing system on the hardware we had the time. As the situation changes (and it slowly is, but not enough yet) that could change... however, I will probably lean towards keeping those API conventions in place just for the sake of consistency with everything that currently exists. Of course if Android is successful and in 10 years from now we are designing a whole new next generation Android framework... well, then the world is a different place.
-</pre>
+</div><br/>
-−
 [[Category:Android]]

@@ Line 7: / Line 7: @@
 == Architecture Diagram ==
-Here is the [http://developer.android.com/images/system-architecture.jpg Android Architecture Diagram]]
+Here is the Android Architecture Diagram, obtained from [http://developer.android.com/images/system-architecture.jpg here].
-It's not copied here for copyright reasons, but basically it has the following layers:
+* applications (written in java, executing in Dalvik)
+* framework services and libraries (written mostly in java)
-* applications (written in java, but executing in Dalvik)
+** applications and most framework code executes in a virtual machine
-* system services and libraries (written mostly in java)
 * native libraries, daemons and services (written in C or C++)
 * the Linux kernel, which includes
-** drivers for hardware, networking, and inter-process-communication
+** drivers for hardware, networking, file system access and inter-process-communication
 == Breakdown of running Android system ==

@@ Line 1: / Line 1: @@
-An overview of Android components, and a diagram of the architecture are
+See Google's
-available at Google's<br>
+[http://developer.android.com/guide/basics/what-is-android.html What is Android? page]
-[[http://developer.android.com/guide/basics/what-is-android.html
+for an overview of Android components, and a diagram of the architecture.
-|What is Android? page]]
 The diagram on that page appears in every presentation I have ever seen
-regarding Android technical topics (with the exception of my own).
+about Android technical topics (with the exception of my own).
 == Architecture Diagram ==