Introduction
Android Componets
UserInterface
Advanced UI
Data Storage
Advanced Concepts
Others
New Studio
Introduction - 1.1 Techo. Introduction
- 1.2 Android - Introduction
- 1.3 Architecture
- 1.4 Application Components
- 1.5 Hello World Example
- 1.6 Project Structure
- 1.7 Android Tools
- 1.8 App Workflow
- 1.9 Multiple Screens Support
- 1.10 Organizing Project
- 1.11 App Debugging
- 1.12 Interview Questions
- 1.13 Creating Emulator and Mobile
- 1.14 Road Map
Createing New Project
Start Eclipse
To Start Eclipse : Click below Marked Symbol in your computer.
Step - 1 : Create an android project
File → New → Android Application Project
Step - 2 : Filling Application Details
Step - 2 : If you click Android Application Project, the below screen comes
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Step - 4 : If you click Finish Button, a project will be created with specified name.(In this Ex : SampleDemo).Your application will be created as follows.
Note : To design android application,we need two files 1. Java File and 2. .xml(UI)(User Interface. (In our example : MainActivity.java is Java file for coding and activity_main.xml is user interface file)
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Step - 5 : Creating another Java File, say Login.java Right on package(com.sample) click on New → Class.Then give Class Name as Login.java
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Now Login.java is added as follows :
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Step - 6 : Creating UI( User Interface File), say login.xml.
Right on layout folderlayoutclick on New → Android XML File.Then give File Name as login.xml
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Now login.xml under layout folder is added as follows :
Android ?
Android, an open source operating system for mobile devices (Smartphone and tablet).It is developed by Google and later the OHA (Open Handset Alliance)(84+ Companies).It contains a linux-based Operating System, middleware and key mobile applications. The Android SDK provides a set of tools and APIs to develop Android applications, using Java. So, if you know Java, Android programming is easy :)
Android Features
Android is a powerful operating system competing with Apple 4GS and supports great features. Few of them are listed
| Feature | Description |
|---|---|
| Connectivity | GSM/EDGE, IDEN, CDMA, EV-DO, UMTS, Bluetooth, Wi-Fi, LTE, NFC and WiMAX. |
| Storage | SQLite, a lightweight relational database, is used for data storage purposes. |
| Media support | H.263, H.264, MPEG-4 SP, AMR, AMR-WB, AAC, HE-AAC, AAC 5.1, MP3, MIDI, Ogg Vorbis, WAV, JPEG, PNG, GIF, and BMP |
| Messaging | SMS and MMS |
| Multi-tasking | User can jump from one task to another and same time various application can run simultaneously. |
| Multi-Language | Supports single direction and bi-directional text. |
| GCM | Google Cloud Messaging (GCM) is a service that lets developers send short message data to their users on Android devices, without needing a proprietary sync solution. |
| Web browser | Based on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine supporting HTML5 and CSS3. |
| Wi-Fi Direct | A technology that lets apps discover and pair directly, over a high-bandwidth peer-to-peer connection. |
Android Applications
1. Android Mobile App
2. Android Wear Apps(Ex :Watches)
3. Android TV Apps
4. Android Auto(Ex :Cars)