Question

In my Android project I am using my custom Android library.

In this library I have defined followed Activity (part of the snippet):

public class MyLibAcitivity extends Activity {

    int  counter = 0;
    int[] results = new int[2];

In the main project I would like to extend this Activity:

public class MainActivity extends MyLibAcitivity {

However, I am getting following error:

Implicit super constructor  is undefined for default constructor. Must define an explicit constructor

How I can make it works?

On the other side, maybe I have not correct approach. What I want to achieve, is to have all logic of the application in library and extend few classes (activities) to use different “data source” – my data source is for now another Java class. So basically, in main class I just want to change source to the local one, instead of taking data from library.

Any thoughts?

Answer 1

Must define an explicit constructor

if you’re on Eclipse you right click on the class code -> Source -> Generate Constructor from Superclass.