How to create an Android application

Install Java JDK and Eclipse.

Then open eclipse tool Go to MenuàWindowàPreferencesà

In that Page select Android and then choose Your Android SDK location which you have downloaded.

Now let us create an app.

Go to MenuàFile àNew àAndroid Application Project

Next Window will be like this.

Now enter your Application Name, Project Name and Package Name.

Note: Package should be minimum two levels in android.

Example: com.sample or com.sample.test

and click next.

 Now select create custom icon, create activity and create project in workspace and then click next.

Choose your icon and click next

   Then click next and then finish.

 This is the main screen of your application.

Structure of your application.

The xml file which display a view to your app

Now i am designing simple login screen
Just drag and drop the component you needed from the left side of your layout(xml file).

 This is the xml code that will generate automatically when you design it by drag and drop. you can edit this as per your need..

Now in Class file, Action listener for Activity as given below and import library as shown..

Create a new class in the Eclipse IDE from File ⇒ Class and fill all required details. I named this activity as HomeActivity.java

Create a new class in the Eclipse IDE from File ⇒ Android xml file and fill all required details. 

 Now open manifest file in your application. It describes information about your application.

Now add your activity (class file which you created additionally) in manifest as shown

Now we have to check output so have to create emulator(android device for testing).

Go to window select Android Virtual Device Manager

 Choose create new AVD(Android Virtual device)

Fill the require details as shown and click ok

 Now choose start option to start your emulator

Emulator look like a real android device so that developer can check the output.

Now to check output your application

Select your app and right click it and choose run as.
 In that select android application and click ok

The output of your app will be like this

Thank you.

Download code here