Using the Android Application class to persist data

Question

I\'m working on a fairly complex Android application that requires a somewhat large amount of data about the application (I\'d say a total of about 500KB -- is this large fo

Answer 1

I don't think 500kb will be that big of a deal.

What you described is exactly how I tackled my problem of losing data in an activity. I created a global singleton in the Application class and was able to access it from the activities I used.

You can pass data around in a Global Singleton if it is going to be used a lot.

public class YourApplication extends Application 
{     
     public SomeDataClass data = new SomeDataClass();
}

Then call it in any activity by:

YourApplication appState = ((YourApplication)this.getApplication());
appState.data.UseAGetterOrSetterHere(); // Do whatever you need to with the data here.

I discuss it here in my blog post, under the section "Global Singleton."