Android Question Call a b4a function from java jar library

[xXswetXx19]

I have a APP in b4a with a list that i want to fill each time that a listener in my jar library is triggered, for this i want to call a function in my b4a code from the jar library, i tried too many ways but it didnt work, can you help me? (Sorry my english)

The jar is the comunication module from a barcode reader with the APP, and i have a class in the jar that executes each time a barcode is readed, so i want addd the code to the list in my b4a app.

 

[aeric]

You should post your error and sample project. No one can see your code to know what's wrong.

Accessing third party Jar with #Additionaljar and JavaObject - Picasso

The #AdditionalJar module attribute (introduced in B4A v3.80) allows us to reference external jars. With the help of JavaObject it is now possible to integrate third party jars without a wrapper. This solution is good for "simple" libraries. If the API is complicated with many interfaces then...

www.b4x.com

 

[agraham]

This sort of how my Basic interpreter library calls back into B4A code. I have simplified the code to omit some threading logic as you don't need that so I might have unwittingly introduced some errors.

private String callhostsub(BA processBA, String sub, Object[] args)
{
        try
        {
            sub = sub.toLowerCase();
            if (args == null)
                args = new String[0];
            if (!BA.subExists(sub))
            {
                BA.Log("B4A", "CallHostSub :  Sub " + sub + " not found!");
                return "";
            }
            String ret;  
            // use raiseEvent2 to let it run during Activity_Create
            ret = (String) BA.raiseEvent2(this, true, sub, false, args);
            // raiseEvent returns null during Activity_Create
            if (ret == null)
            {
        ret = "";
            }
      return ret;
        } catch (Exception e)
        {
            String msg = "CallHostSub : " + sub + " - " + e.toString() + " - " + e.getMessage();
            BA.Log( msg);
        }
        return "";
    }