Android Tutorial [java] Video tutorial - Creating a simple library

[djpero]

I was followed complete video tutorial, and I have no errors but cannot locate the Jar file. The xml file is created properly?

Ok, i figured, I extract the Jar file, but I having this error while importing lib into b4a.

 

[Erel]

Seems like there is more than one method with that name.

 

[Stulish]

Erel,

I have just used your video tutorial, and it worked a dream, i now have an extra library for multiplying a number by two

Now all i need to do is learn some java (seems similar to C so i will have to get reading)

Thanks for a great tutorial

Stu

 

[Henok]

Thanks Erel

Very helpful, thanks Erel.:sign0098:

 

[Jmu5667]

No Jar File created

Hi


I followed the video tutorial, got an XML output but no Jar file ...

Any ideas, no errors or warnings generated, also new to eclipse.

Regards

John.

 

[agraham]

Look at the third line of the first post in this thread.

 

[Peter Simpson]

Great video but

With me it only makes the XML file and not the jar file. I've completely had it with eclipse, I'm un-installing it before my new laptop end up going through my opened window :BangHead:

Btw, the video is absolutely brilliant Erel...

 

[Erel]

See the first post in this thread. You can also use SLC tool to compile the library.

 

[StarinschiAndrei]

Hi Erel , the youtube tutorial is great , but how can i create the xml file from an existing jar file ? i cound't find any description about this. Can any body send me a description ? or advice me how can i proceed ! Thank you.

 

[Erel]

You will need to create a wrapper library with the @DependsOn annotation. See SLC tool for an example.

 

[StarinschiAndrei]

Hi Erel ,

I checked you mentioned tutorial but unfortunately i don't have any java files. To be easier for you to advice me i attached the jar file (this is an api for cutom termal printer). Thank you

 

[Johan Schoeman]

Android is based on Java 6. Make sure that you set the project JDK version to 6.

Hi Erel

Busy trying my hand at this. Sorry for the stupid question but where and how do I do it or check that I am indeed making use of JDK version 6. Have just gone through the video tutorial and everything working 100% (including making use of the lib in a B4A project) but unsure if my Eclipse project is using JDK v6.

Make sure that you set the project JDK version to 6.

Edit:
I have the Execution environment set to JavaSE-1.6 (jre8). I guess this must be it?

THIS IS BETTER THAN CHEESE!

 

[Erel]

Note that Java 7 is also supported now.

 

[little3399]

HI,
here is my compile error message

 

[Johan Schoeman]

HI,
here is my compile error message

Can you post your code of Firstlib? Might be easier to see what the exact problem is. There is an example here of how I have done it by writing the Java code in Notepad and compiled it with Simple Library Compiler.

https://www.b4x.com/android/forum/threads/creating-a-library-with-simple-library-compiler-slc.48196/

 

[little3399]

Hi , here is my FirstLib code

 

[Johan Schoeman]

Hi , here is my FirstLib code

Your code seems to be fine. Have you followed what is stated in posts 31 to 33 of this thread?

 

[Erel]

Make sure to compile your library with Java 7 or 6.

 

[Erel]

No. You can use Java 8 to compile. Make sure to set the compliance level to java 7.

Another (recommended) option is to use SLC to compile the library.

 

[little3399]

Java8 how to set the compliance level to java 7 ? Tks!