Error parsing libraries

[Brendon]

Hi All,
I'm developing a library to show pdf natively in my app. I've found source code for doing this, but when I try to import this library into B4A it gives me an error
Error parsing library
Object reference not set to an instance of an object.

Maybe I'm doing something wrong with my library

Can someone give me a hint on how to solve this?

Kind regards

 

[NeoTechni]

Did you initialize the object?

Can you post your code?

 

[Brendon]

As it's a LGPL suorce code, I was trying to post all of it, but I cannot as it's bigger than limits. By the way I've seen it creates an activity inside it's code. Maybe that B4A doesn't allow it.

 

[Erel]

You cannot directly import a jar file. You will need to create a jar file that wraps it.

There is no problem with having an activity inside the library. You will just need to declare it with the manifest editor.

 

[Brendon]

Thank you Erel.
Another question is can I derive an activity in B4A? I need it as library specs says to create activity from the one in library itself.

Kind regards

 

[Brendon]

Now I've solved my previous problem, but now when I import it shows me messaga of attched bitmap. Can someone give me a hint about causes of this behaviour?

Kind regards

 

[Erel]

Are you sure that you are loading the wrapper library and not the library itself?

 

[Brendon]

Hi Erel,
I've made another library to manage this, and according to library tutorial, I've made a Java project, not and android one. As I've developed other libs working well, I've decided to do same thing. According to me, going on this way, I don't need a wrapper, but I don't have so many skill in B4A to be sure I don't need it, so I'd like to know if I can send you my code to have your opinion about it.

Regards
Riccardo

 

[Erel]

If possible, please start a new thread in the libraries developers subforum and upload the code there.

 

[Brendon]

Hi Erel,
I cannot post my code because is a large amount of file and it excedes max size for attachments.
I've found that i've forgotten to specify ShortName and Version declaration.
I've put thos declarations and now IDE links my library, but when i try to start my app it gives me an error:

Compiling code. 0.11
Generating R file. 0.00
Compiling generated Java code. Error
B4A line: 25
Dim a As PdfViewer
javac 1.6.0_24
src\com\palmosoft\market\main.java:221: net.sf.andpdf.pdfviewer.PdfViewerActivity is abstract; cannot be instantiated
_a = new net.sf.andpdf.pdfviewer.PdfViewerActivity();Debug.locals.put("a", _a);
^
1 error

Kind regards
Riccardo

 

[Erel]

This class is an abstract class. You should create a concrete class by subclassing it.

 

[Jonas]

Brendon

Im just curious if you got the lib working and was able to show PDFs in your app?