Best practice to pass Context to non-activity classes?

Question

So, my first major application is almost coded and I'm doing optimizations on my code. The app works fine, but I'm not sure about my way of passing the context to other classes. I don't want to do it the wrong way. I stumbled upon articles and questions here in Stackoverflow about contexts and which is the right way to pass it to non-activity classes. I read the documentation as well, but being a Finn makes complicated tech speak even harder to understand.

So, a simple question. Is my way of passing my main activity's context to other (helper) classes correct? If not, where can I read more about better practice on these situations.

For example: MainActivity.java

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle sis){
        super(sis);
        new Helper(MyActivity.this).makeMyAppAwesome();
    }
}

Helper.java

public class Helper {
    Context context;
    Helper(Context ctx){
        this.context = ctx;
    }

    public void makeMyAppAwesome(){
        makeBaconAndEggsWithMeltedCheese(context);
    }
}

Is this OK? It would be nice if someone could provide an easy to read article with examples on this subject.

Answer 1

You can do that using ContextWrapper, as described here.

For example:

public class MyContextWrapper extends ContextWrapper {

    public MyContextWrapper(Context base) {
      super(base);
   }

    public void makeMyAppAwesome(){
        makeBaconAndEggsWithMeltedCheese(this);
    }
}

And call the non activity class like this from an Activity

new MyContextWrapper(this);