diff options
author | Scott Main <smain@google.com> | 2012-06-21 17:14:39 -0700 |
---|---|---|
committer | Scott Main <smain@google.com> | 2012-06-21 21:27:30 -0700 |
commit | 50e990c64fa23ce94efa76b9e72df7f8ec3cee6a (patch) | |
tree | 52605cd25e01763596477956963fabcd087054b0 /docs/html/guide/basics | |
parent | a2860267cad115659018d636bf9203a644c680a7 (diff) | |
download | frameworks_base-50e990c64fa23ce94efa76b9e72df7f8ec3cee6a.zip frameworks_base-50e990c64fa23ce94efa76b9e72df7f8ec3cee6a.tar.gz frameworks_base-50e990c64fa23ce94efa76b9e72df7f8ec3cee6a.tar.bz2 |
Massive clobber of all HTML files in developer docs for new site design
Change-Id: Idc55a0b368c1d2c1e7d4999601b739dd57f08eb3
Diffstat (limited to 'docs/html/guide/basics')
-rw-r--r-- | docs/html/guide/basics/what-is-android.jd | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/docs/html/guide/basics/what-is-android.jd b/docs/html/guide/basics/what-is-android.jd deleted file mode 100644 index 9393fab..0000000 --- a/docs/html/guide/basics/what-is-android.jd +++ /dev/null @@ -1,141 +0,0 @@ -page.title=What is Android? -@jd:body - -<p>Android is a software stack for mobile devices that includes an operating -system, middleware and key applications. The <a -href="http://developer.android.com/sdk/index.html">Android SDK</a> -provides the tools and APIs necessary to begin developing applications on the -Android platform using the Java programming language.</p> - -<h2>Features</h2> - -<ul> - <li><strong>Application framework</strong> enabling reuse and replacement - of components</li> - <li><strong>Dalvik virtual machine</strong> optimized for mobile - devices</li> - <li><strong>Integrated browser</strong> based on the open source <a - href="http://webkit.org/">WebKit</a> engine </li> - <li><strong>Optimized graphics</strong> powered by a custom 2D graphics library; 3D - graphics based on the OpenGL ES 1.0 specification (hardware acceleration - optional)</li> - <li><strong>SQLite</strong> for structured data storage</li> - <li><strong>Media support</strong> for common audio, video, and still - image formats (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, - GIF)</li> - <li><strong>GSM Telephony</strong> (hardware dependent)</li> - <li><strong>Bluetooth, EDGE, 3G, and WiFi</strong> (hardware dependent)</li> - <li><strong>Camera, GPS, compass, and accelerometer</strong> (hardware dependent)</li> - <li><strong>Rich development environment</strong> including a device - emulator, tools for debugging, memory and performance profiling, and a plugin for the Eclipse IDE</li> -</ul> - -<a name="os_architecture" id="os_architecture"></a> -<h2>Android Architecture</h2> - -<p>The following diagram shows the major components of the Android operating -system. Each section is described in more detail below.</p> - -<p><img src="{@docRoot}images/system-architecture.jpg" alt="Android System Architecture" width="713" height="512"></p> - -<a name="applications" id="applications"></a> -<h2>Applications</h2> - -<p>Android will ship with a set of core applications including an email -client, SMS program, calendar, maps, browser, contacts, and -others. All applications are written using the Java programming language.</p> - -<a name="application_framework" id="application_framework"></a> -<h2>Application Framework</h2> - -<p>By providing an open development platform, Android -offers developers the ability to build extremely rich and innovative -applications. Developers are free to take advantage of the -device hardware, access location information, run background services, set alarms, -add notifications to the status bar, and much, much more. </p> - -<p>Developers have full access to the same framework APIs used by the core -applications. The application architecture is designed to simplify the reuse -of components; any application can publish its capabilities and any other -application may then make use of those capabilities (subject to security -constraints enforced by the framework). This same mechanism allows components -to be replaced by the user.</p> - -<p>Underlying all applications is a set of services and systems, including: -<ul> - <li>A rich and extensible set of <a - href="{@docRoot}resources/tutorials/views/index.html">Views</a> that can be used to - build an application, including lists, grids, text boxes, buttons, and even - an embeddable web browser</li> - <li><a href="{@docRoot}guide/topics/providers/content-providers.html">Content - Providers</a> that enable applications to access data from other - applications (such as Contacts), or to share their own data</li> <li>A <a - href="{@docRoot}guide/topics/resources/resources-i18n.html">Resource - Manager</a>, providing access to non-code resources such as localized - strings, graphics, and layout files</li> - <li>A {@link android.app.NotificationManager Notification Manager} that enables - all applications to display custom alerts in the status bar</li> - <li>An {@link android.app.Activity Activity Manager} that manages the - lifecycle of applications and provides a common navigation backstack</li> -</ul> - -<p>For more details and a walkthrough of an application, see the <a -href="{@docRoot}resources/tutorials/notepad/index.html">Notepad Tutorial</a>.</p> - -<a name="libraries" id="libraries"></a> -<h2>Libraries</h2> - -<p>Android includes a set of C/C++ libraries used by various components of the -Android system. These capabilities are exposed to developers through the -Android application framework. Some of the core libraries are listed below:</p> -<ul> - <li><strong>System C library</strong> - a BSD-derived implementation of - the standard C system library (libc), tuned for embedded Linux-based - devices</li> - <li><strong>Media Libraries</strong> - based on PacketVideo's OpenCORE; - the libraries support playback and recording of many popular audio and video - formats, as well as static image files, including MPEG4, H.264, MP3, AAC, - AMR, JPG, and PNG</li> - <li><strong>Surface Manager</strong> - manages access to the display - subsystem and seamlessly composites 2D and 3D graphic layers from multiple - applications</li> - <li><strong>LibWebCore</strong> - a modern web browser engine which - powers both the Android browser and an embeddable web view</li> - <li><strong>SGL</strong> - the underlying 2D graphics - engine</li> - <li><strong>3D libraries</strong> - an implementation based on - OpenGL ES 1.0 APIs; the libraries use either hardware 3D acceleration - (where available) or the included, highly optimized 3D software - rasterizer</li> - <li><strong>FreeType</strong> - bitmap and vector font rendering</li> - <li><strong>SQLite</strong> - a powerful and lightweight relational - database engine available to all applications</li> -</ul> - -<a name="runtime" id="runtime"></a> - -<h2>Android Runtime</h2> - -<p>Android includes a set of core libraries that provides most of -the functionality available in the core libraries of the Java programming -language.</p> - -<p>Every Android application runs in its own process, with its own instance of -the Dalvik virtual machine. Dalvik has been written so that a device can run -multiple VMs efficiently. The Dalvik VM executes files in the Dalvik -Executable (.dex) format which is optimized for minimal memory -footprint. The VM is register-based, and runs classes -compiled by a Java language compiler that have been transformed into the .dex -format by the included "dx" tool.</p> - -<p>The Dalvik VM relies on the Linux kernel for underlying functionality such -as threading and low-level memory management.</p> - -<a name="kernel" id="kernel"></a> - -<h2>Linux Kernel</h2> - -<p>Android relies on Linux version 2.6 for core system services such as -security, memory management, process management, network stack, and driver -model. The kernel also acts as an abstraction layer between the hardware and -the rest of the software stack.</p> |