Androis AS IS

Android Emulator

The Android SDK includes a mobile device emulator — a virtual mobile device that runs on your computer. The emulator lets you develop and test Android applications without using a physical device.

This document is a reference to the available command line options and the keyboard mapping to device keys. For a complete guide to using the Android Emulator, see Using the Android Emulator.

Android Components

• The Android operating system is a multi-user Linux system in which each app is a different user.

Restful , javaEE & json

WebComponent over JAVA EE

Lets think about JSON


JSON is a text-based data exchange format derived from JavaScript that is used in web services and other connected applications. The following sections provide an introduction to JSON syntax, an overview of JSON uses, and a description of the most common approaches to generate and parse JSON.

JSON Syntax

JSON defines only two data structures: objects and arrays. An object is a set of name-value pairs, and an array is a list of values. JSON defines six data types: string, number, object, array, true, false and null.

Android HolaMundo

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XML & JAVA