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Android Programming for Beginners

Android Programming for Beginners

By : John Horton, Mayani
4.1 (47)
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Android Programming for Beginners

Android Programming for Beginners

4.1 (47)
By: John Horton, Mayani

Overview of this book

Android is the most popular OS in the world. There are millions of devices accessing tens of thousands of applications. It is many people's entry point into the world of technology; it is an operating system for everyone. Despite this, the entry-fee to actually make Android applications is usually a computer science degree, or five years’ worth of Java experience. Android Programming for Beginners will be your companion to create Android applications from scratch—whether you’re looking to start your programming career, make an application for work, be reintroduced to mobile development, or are just looking to program for fun. We will introduce you to all the fundamental concepts of programming in an Android context, from the Java basics to working with the Android API. All examples are created from within Android Studio, the official Android development environment that helps supercharge your application development process. After this crash-course, we’ll dive deeper into Android programming and you’ll learn how to create applications with a professional-standard UI through fragments, make location-aware apps with Google Maps integration, and store your user’s data with SQLite. In addition, you’ll see how to make your apps multilingual, capture images from a device’s camera, and work with graphics, sound, and animations too. By the end of this book, you’ll be ready to start building your own custom applications in Android and Java.
Table of Contents (32 chapters)
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31
Index

Sound FX touches to Note To Self

As it has become customary over the last few chapters, we will use our new-found knowledge to add an enhancement to our Note To Self app. This chapter will be the last time we do this, however, before we move on to new coding pastures.

Using your operating system's file browser, go to the app\src\main folder of the project and add a new folder called assets.

There is a sound file called beep.ogg ready-made for you in the Chapter 17/Note To Self/assets folder of the download bundle. Of course, you can make your own sound FX using Bfxr if you prefer.

Place the file into the assets directory that you just created.

Now, we can add some Java code to play the beep sound each time a note from the list is selected.

First, let's add a couple of new member variables to the MainActivity class:

public class MainActivity extends AppCompatActivity {

  Animation mAnimFlash;
  Animation mFadeIn;

  int mIdBeep = -1;
  SoundPool mSp;

  private NoteAdapter mNoteAdapter...

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