How to get android context from a reference of interface?

Question

I have an activity which instantiate a class with an interface. How I can get the android context within MyClass with only the reference to the interface?

public class TestActivity extends Activity implements MyInterface {

    @Override
    public void onCreate(final Bundle savedInstanceState) {
        final MyClass myClass = new MyClass(this);

    }

    @Override
    public void onChange() {

    }
}


public interface MyInterface {
    void onChange();
}

public class MyClass {
    public MyClass(MyInterface myInterface) {
       // how to get context from myInterface ???
    }
}

Answer 1

public class MyClass {
    public MyClass(MyInterface myInterface) {
    // Get Context
    Context context = null;
    if (myInterface instanceOf Context)
        context = (Context)myInterface;
    }
}

If your Activity (which extends Context) is implementing MyInterface and you pass that to MyClass, you just need to cast it to the appropriate type.