As an Ubuntu lover, I am so excited to see the arrival of Ubuntu for Phone.
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.
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.
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.
Underlying all applications is a set of services and systems, including:
- A rich and extensible set of Views that can be used to build an application, including lists, grids, text boxes, buttons, and even an embeddable web browser
- Content Providers that enable applications to access data from other applications (such as Contacts), or to share their own data
- A Resource Manager, providing access to non-code resources such as localized strings, graphics, and layout files
Notification Managerthat enables all applications to display custom alerts in the status bar
Activity Managerthat manages the lifecycle of applications and provides a common navigation backstack
For more details and a walkthrough of an application, see the Notepad Tutorial.
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:
- System C library – a BSD-derived implementation of the standard C system library (libc), tuned for embedded Linux-based devices
- Media Libraries – 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
- Surface Manager – manages access to the display subsystem and seamlessly composites 2D and 3D graphic layers from multiple applications
- LibWebCore – a modern web browser engine which powers both the Android browser and an embeddable web view
- SGL – the underlying 2D graphics engine
- 3D libraries – 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
- FreeType – bitmap and vector font rendering
- SQLite – a powerful and lightweight relational database engine available to all applications
Android includes a set of core libraries that provides most of the functionality available in the core libraries of the Java programming language.
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.
The Dalvik VM relies on the Linux kernel for underlying functionality such as threading and low-level memory management.
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.
In my sandbox environment, there are no Internet connection or wireless LAN. I thought I won’t be able to test the Lync Mobility service (How to deploy Lync Mobility Serivce) until I found ‘Virtual Router Manager’.
It turns my laptop into a Ad-hoc for my iPhone to access the sandbox environment. It is really awesome!! Start the Virtual Router, and you can see my iPhone has been connected.
With this great tool, I was able to login into the Lync from my iPhone.
I used to take X-lite as my VOIP softphone client on my Windows 7 machine. Personally speaking, it is just OK. Someone recommended Express Talk VOIP softphone to me couple weeks ago, and I have been using it since then. I think it is much better than X-lite in terms of UI and stability.
With Express Talk business version, you can use up to 6 VOIP phone lines. If you just want to use it at home, you can choose the free version which supports 1 line only.