1. Introduction to Android

1)Open Handset Alliance
Download Syllabus

Welcome to the Open Handset Alliance™, a group of 84 technology and mobile companies who have come together to accelerate innovation in mobile and offer consumers a richer, less expensive, and better mobile experience. Together we have developed Android™, the first complete, open, and free mobile platform.

We are committed to commercially deploy handsets and services using the Android Platform.

********************************************************************************************************

2)Definition - What does Android Platform mean?

 

The Android platform is a platform for mobile devices that uses a modified Linux kernel. The Android Platform was introduced by the Open Handset Alliance in November of 2007. Most applications that run on the Android platform are written in the Java programming language.

**********************************************************************************************************************************

3)software development kit

A software development kit that enables developers to create applications for the Android platform. The Android SDK includes sample projects with source code, development tools, an emulator, and required libraries to build Android applications.

******************************************************************************************************

4)Building a simple Android application

1) Create the New Android project

For creating the new android project:

1) Select File > New > Project...

2) Select the android project and click next

3) Fill the Details in this dialog box and click finish

Now an android project have been created. You can explore the android project and see the simple program, it looks like this:

---

2) Write the message

For writing the message we are using the TextView class. Change the onCreate method as:

1. TextView textview=new TextView(this);  
2. textview.setText("Hello Android!");  
3. setContentView(textview);