ANDROID PROGRAMMING 3

1. Sound

1.1. Put the audio file into res/raw. 
1.2. Declaration
MediaPlayer mp;
mp = MediaPlayer.create(MainActivity.this, R.raw.btnsound); 
1.3. Call
mp.start();

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ANDROID PROGRAMMING 2

1. Running your application

+ AndroidManifest.xml: describes the basic characteristics of the app. You should set the  android:targetSdkVersion as high as possible and test your app on the corresponding platform version.
+ src/: contains main source files.
+ res/: contains some sub-directories for app resources. Here are just a few:
        ++ drawable-hdpi/: for drawable objects that are designed for high-density (hdpi) screen.
        ++ layout/: for files that define your app's user interface.
        ++ values/: for other various XML files that contain a collection of resources, such as string and color definitions.

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ANDROID PROGRAMMING 1

1. Some terminologies:

+ JRE (Java Runtime Environment): is basically the Java Virtual Machine, covers the need of running applications. It also includes browser plugins for Applet execution. 
+ JDK (Java Developper Kit): include JRE, compiler, debugger,... for creating and compiling programs. It is a subset of SDK. 
+ Eclipse: provides comprehensive facilities for software development in some languages.  
+ Android SDK: include API libraries and developper tools for creating, test and debug Android apps. 
+ ADT Bundle: include Eclipse and Android SDK. It helps streamline your Android app development. 
+ ADT Plugin: extends the capabilities of Eclipse to let you quickly set up new project, create an app UI, add packages based on Android framework API, debug and export .apk files.

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