On Sat, Jun 11, 2011 at 3:19 AM, Reza <r.shifte...@gmail.com> wrote:
> My main Activity is as below:
>
> public class MainActivity extends Activity{
> public void onCreate(){
> TestClass mTestClass = new TestClass(this); <br/>
> }
>
> public testMethod(){
> // do some work here
> }
> }
>
>
> now, in my TestClass.java I receive reference to the MainActivity:
>
> public class TestClass{
>
> public TestClass(Activity mActivity){
> mActivity.testMethod(); //Android/Java doesn't recoginze
> testMethod here????
> }
> }
Of course. There is no testMethod() implemented on Activity. If you
want to reference testMethod(), you have to pass a MainActivity to
TestClass' constructor, not just an Activity.
> I've been trying to solve this issue for a few days with no success.
Since you are new to Java, I recommend you stop Android development
for a few months and learn Java outside of Android. Trying to learn
Java and Android at the same time will be very frustrating, as most
Java educational resources do not deal with the things that are odd
about Android.
> P.S. The TestClass will act as a library that everyone can call it
> from their android application. In other words, I provide the
> TestClass as the library. The user then implements the content of a
> method that will be executed whenver certain conditions are met. Thus,
> I need to call that specific method (which will be defined by the user
> in their own Activity) through a reference which is passed by the user
> to my library class
As you spend your months learning Java, I recommend that you learn
about Java interfaces.
http://en.wikipedia.org/wiki/Interface_(Java)
--
Mark Murphy (a Commons Guy)
http://commonsware.com | http://github.com/commonsguy
http://commonsware.com/blog | http://twitter.com/commonsguy
Android Training...At Your Office: http://commonsware.com/training
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