You can convert images ( jpeg files in gallery ) to a PDF file.
( Free version limit : up to 10 images per a PDF file, unlimited version https://market.android.com/details?id=com.bfrontier.imagestopdfunlimited )
How to use?
1. Launch the gallery app to pick images. ( If you can't open the gallery app via a button in this app, please open the gallery app directory. )
2. Pick images by long tap. You can select a folder or multiple images.
3. Touch Share menu, Select ImagesToPDF.
4. Push Yes button.
5. Now you can view PDF ( tap the file name ) or share PDF ( long tap ). The PDF file is saved in SDCard/ImagesToPDF folder.
This app is provided "as is", without warranty of any kind.
Your use of the app is at your own risk.