These PDF library is commercial use? [closed]

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I read this thread : https://stackoverflow.com/questions/4665957/pdf-parsing-library-for-android .

Vikas Patidar mentions that there are some open source library on Android like

• Android PDF Viewer
• APDFViewer
• droidreader
• android-pdf

Some of them are licensed with GNU GPL v2. Some of them are licensed with GNU GPL v3. I want to ask whether they can be used in a commercial applcation.

Thanks.

Answer 1

Try looking into GPL licences rather than PDF libraries, then you will have a better idea of what you will have to do to include it in your project. Here are some resources.

http://www.gnu.org/licenses/quick-guide-gplv3.html

https://stackoverflow.com/questions/5197503/to-gpl-or-to-not-gpl-that-is-the-question

Answer 2

If you just want to know if you can use a GPL library in a commercial, closed-source application without paying a single cent, then the answer is no, you cannot.