HOw To Save a Command's Output to a File

An incredibly useful Command Prompt trick is the use of redirection operators, specifically the > and >> operators.

These little characters let you redirect the output of a command to a file, giving you a saved version of whatever data the command produced in the Command Prompt window.

For example, let's say you're about to post a computer problem to an online forum and you want to provide really accurate information about your computer. An easy way to do that would be to use the systeminfo command with a redirection operator.

For example, you might execute systeminfo > c:\mycomputerinfo.txt to save the information provided by the systeminfo command to a file. You could then attach the file to your forum post.

See How To Redirect Command Output to a File for more examples and a better explanation of how to use redirection operators.

Introduction Of Android in Patna

Android Introduction

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What is Android?

Android is an operating system based on the Linux kernel. The Android system supports background processing, provides a rich user interface library, supports 2-D and 3-D graphics using the OpenGL-ES (short OpenGL) standard and grants access to the file system as well as an embedded SQLite database.

Android platform components

The Android system is a full software stack, which is typically divided into the four areas as depicted in the following graphic.

The levels can be described as

• Applications
The Android Open Source Project contains several default application, like the Browser, Camera, Gallery, Music, Phone and more.
• Application framework
An API which allows high-level interactions with the Android system from Android applications.
• Libraries and runtime
The libraries for many common functions (e.g.: graphic rendering, data storage, web browsing, etc.) of the Application Framework and the Dalvik runtime, as well as the core Java libraries for running Android applications.
• Linux kernel
Communication layer for the underlying hardware. The Linux kernel, the libraries and the runtime are encapsulated by the application framework. The Android application developer typically works with the two layers on top to create new Android applications.


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