Lessons

Lessons

Lesson 1. Introduction

Good afternoon!

This is an introductory lesson. We will not code anything here. In this lesson I will enlighten reasons why I decided to create this site.

Lesson 2. Installing and configuring development environment Eclipse and SDK Tools

To write programs we need a development environment. Google recommends to use Eclipse for this purpose with Android Development Tools (ADT) plugin. In this lesson we will have a look in detail how to install and configure this development environment.

Lesson 3. Creating AVD. The first application. Android project structure

To test our applications we will need an Android Virtual Device (AVD). It is an Android smartphone emulator, where Eclipse can install and launch our applications. Let’s create it.

Lesson 4. Layout elements and their properties

Let’s have a look how is screen content composed in Android applications.

Lesson 5. Layout-file for Activity. XML Representation. Changing screen orientation

In the last lesson we have learnt that Activity reads a layout-file and displays what is configured in it. Now let’s find out how Activity knows which specific file to read.

Lesson 6. Layout types. Key differences and properties

Positioning of View-elements on the screen depends on the ViewGroup (layout), inside which they are located. In this lesson we will observe main types of Layouts.

Lesson 7. Layout parameters for View-elements

In this lesson we will:

- examine screen properties;
- explore layout parameters (height, width, margin, gravity, weight)

Lesson 8. Working with layout elements from code

In this lesson we will:

- learn how to refer to View-elements on the screen from code and change their properties

Lesson 9. Event listeners with Button example

In this lesson we will:

- learn how to process button clicks and find out what a listener is.

Lesson 10. Optimizing event listeners implementation

In this lesson we will:

- learn how to use one listener for several View-elements
- teach Activity to to act as a listener

Lesson 11. res/values folder. Using application resources

In this lesson we will:

- find out what is res/values folder needed for, what can you store in it and how to use it.

Lesson 12. Logs and Toast messages.

In this lesson we will:

- look through application logs and Toast messages

Lesson 13. Creating a simple menu

In this lesson we will:

- create menu items

Lesson 14. Menu, groups, order. MenuInflater and xml-menu

In this lesson we will:

- create menu items with IDs
- group and sort menu items

Lesson 15. Context menu

In this lesson we will:

- create a context menu

Lesson 16. Creating layout programmatically. LayoutParams

In this lesson we will:

- create layout programmatically, not using layout-files

Lesson 17. Creating View-components in a running application

In this lesson we will:

- add components to the screen while application is running

Lesson 18. Changing layoutParams in a running application

In the this lesson we will:

- change layout-parameters for already existing screen components

Lesson 19. Creating a simple calculator

In the this lesson we will:

- write a calculator application

Lesson 20. Animation

In the this lesson we will:

- explore animation of View-components

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