Question

I have one class ApplicationDetails, with getter and setter methods.

public class ApplicationDetails {
    String supportURL;
    String companyURL;
    String copyRightText;

    // with getter and setter methods 

}

I am setting all data in my splash screen activity.

ApplicationDetails appDetails = new ApplicationDetails();
String supportURL = getResources().getString(R.string.support_url);
appDetails.setSupportURL(supportURL);

For sample I just setting data from string file but in app its coming from different sources.

But when I tried to access data in different activity its returns null value.
e.g.

public class AboutViewController extends Activity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ApplicationDetails appDetails = new ApplicationDetails();
        System.out.println(" app support url " + appDetails.getSupportURL());
    }

}

output

I/System.out(2242):  app support url null

any help.

Answer 1

You get null, because you create a new object and all fields are initialized to zero.

In your case, I see these fields are going to be the same through application, so you can use a Singleton pattern and instantiate only one object for your application and refer to it later on. You don’t need to create a new object each time you refer to it. It would be ok for this class and you can also make them constants. (I guess these variables won’t change through execution)