Android Tutorial [java] Creating libraries for B4A

Avansys · Dec 9, 2013

Erel said:
See the guide I pointed you to.
Guide - Using onActivityResult

There is already a PayPal library available.

Yeah, I know, but this library have some errors, so I want to try make a new library

Avansys · Dec 9, 2013

And respect of read the link, I read it, but I didn't understand it
Is there an example easier than the last example?
Or maybe, Is there other form for do it?

Erel · Dec 10, 2013

There isn't any other tutorial. Which error did you encounter?

steynpjm · Dec 20, 2013

Now that we have B4J, how does it influence this thread? Is Eclipse still needed?

Erel · Dec 20, 2013

You still need to write Java code in order to build a library (either for B4J or B4A).

You can use SLC tool to build the Java code to the XML / Jar files. This is easier than configuring Eclipse to do it.

Avansys · Jan 11, 2014

I found my error, I didn't add the paypal .jar =), but now I get this problem:

java.lang.NoClassDefFoundError: com.richard.avansys.APayPal
at com.avansys.testultracable.ventanapagos._globals(ventanapagos.java:461)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:169)
at com.avansys.testultracable.ventanapagos.initializeGlobals(ventanapagos.java:230)
at com.avansys.testultracable.ventanapagos.afterFirstLayout(ventanapagos.java:86)
at com.avansys.testultracable.ventanapagos.access$100(ventanapagos.java:16)
at com.avansys.testultracable.ventanapagos$WaitForLayout.run(ventanapagos.java:74)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3824)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)

I followed the Youtube instructions, but I get this problem. In my test library I have a class that does a simple sum.

Erel · Jan 12, 2014

This error means that the class file is missing from the jar. See my answer in the PayPal library thread. The tablets issue should have been resolved.

Erel · May 25, 2014

There is a missing step in the video. See the first post.

msa · May 25, 2014

Tanks

kepler · Mar 8, 2015

Hello,

I've tryed the simple method showned, but I was only able to retrieve the xml file, not the jar....

What am I doing wrong?

Kind regards,

Kepler

Alberto Iglesias · Sep 17, 2015

Erel,

Can you put the your autohotkey script that creates the jar file and copies it to the libraries folder?

I need to use the Eclipse right now and this will be very useful.

Thanks

Alberto Iglesias

Erel · Sep 17, 2015

The simplest way it with SLC. It can be run from the command line.

Create a batch file that builds the project and then copy the files to the libraries folder.

Alberto Iglesias · Sep 17, 2015

I normally use the SLC, but with with library I need to use the .so files embedded in this library, I don´t know if with SLC is it possible, then I take a look in eclipse way.

What you recommend with this scenario?

B4A Library + libxxxxxx.so
How to compile with SLC?

And where is .so file is saved? The structure for that?

Thanks

Erel · Sep 17, 2015

SLC supports so files.

Start a new thread for this and I'll post the folders structure.

Alberto Iglesias · Sep 17, 2015

Created..

https://www.b4x.com/android/forum/threads/slc-tool-and-structures.58467/

Please, if you describe this structures, a lot of developers thank you!!!

Thanks

Alberto Iglesias · Sep 21, 2015

Someone knows how to embedded a .jar file inside a library?

I mean, to create a library developed in Java with dependence on another, but at the end of compilation only requires a single .jar and .xml that need B4A

Example:

I create a MyLib.xml and MyLib.jar

But the MyLib.jar depends on Third.jar.

I don´t want to send separately a different library, want you to be embedded in MyLib.jar.

it's possible?

Thanks

DonManfred · Sep 21, 2015

Alberto Iglesias said:
it's possible?

as far as i know no.

Erel · Sep 21, 2015

Note that you should have started a new thread for this question.

You can always merge libraries. jar files are just zip files.

cimperia · Sep 21, 2015

I think it's possible. You use Jar to extract both jars and then Jar again to combine then in one Jar.

B4X:

jar -xvf MyLib.jar
jar -xvf Third.jar

rm MyLib.jar Third.jar

jar -cvf MyLib.jar

Dany Rocha · Apr 24, 2016

I need help to create a library to work with this TPS-586 device.
I want to use to create B4a app to work with thermal printer and RFID card reading.

Erel I need your help.

Link Attached this whole sdk documentation.
https://www.sendspace.com/file/g1mher

Link Produtc
http://en.telpo.com/product2-612-617-2407-2.html

Android Tutorial [java] Creating libraries for B4A

Member

Member

B4X founder

New Member

B4X founder

Member

B4X founder

B4X founder

Member

Active Member

Well-Known Member

B4X founder

Well-Known Member

B4X founder

Well-Known Member

Well-Known Member

Expert

B4X founder

Active Member

New Member

Attachments

Similar Threads

Privacy & Transparency

Privacy & Transparency