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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

Saving a new photo from the capture fragment

Open up the CaptureFragment.java file in the editor.

We need to add a new member variable for the CaptureFragment class to hold our new DataManager class instance.

Add the new highlighted member variable to CaptureFragment, which we have just discussed:

public class CaptureFragment extends Fragment{
  
  private static final int CAMERA_REQUEST = 123;
  private ImageView mImageView;
  
  // Where the captured image is stored
  private Uri mImageUri = Uri.EMPTY;
  
  // Where to save the image
  String mCurrentPhotoPath;
  
  // A reference to our database
  private DataManager mDataManager;
  
  @Override
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

  }

Now, we can initialize the DataManager instance by adding this highlighted line of code to the onCreate method in CaptureFragment:

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  mDataManager = 
   ...

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