I have a project built in old version of Android Studio, and i am trying to rebuild in new version.
But its throwing me this error. I don't why its coming...?
 Program type already present: org.a...

Challenger Comics Viewer is a FREE (NO ADS) advanced comics, manga, books and PDF viewer.
It's really simple to use. You just have to scroll ! Pages are automatically loaded and displayed (no need to click to go to next page).
It's FREE and THERE ARE NO ADS.
This version works perfectly on phones AND tablets.

Supported image file formats are JPG, PNG, GIF, WebP (Android 4.0+) and BMP.
Supported book file formats are PDF, CBZ/ZIP, CBR/RAR, CBT/TAR, CB7/7Z, DjVu and ePUB.

Main features are :
• Automatic page loading
• Zoom using multi-touch
• Vertical/Horizontal scrolling
• 2 display modes (Simple View which displays pages one by one and Multiple Image View which displays all pages one after the other)
• Scale filters: Bilinear, Bicubic, Lanczos4
• Library with covers displayed to quickly open comics (multiple kind of views available)
• Automatically switch to next issue when last page of the comic is displayed
• Border cropping
• Read from left to right or right to left
• Actions can be customized
• Single page…

Readler (reader PDF, DJVU, CBR, CBZ) is the ideal program for reading files and PDF books, magazines, comic books CBZ and CBR for free and without ads.

Upload your PDF files to Readler and enjoy a comfortable reading. Readler is able to read any PDF &DJVU files, as well as a special comic book formats - CBR and CBZ.

Reader is convenient and beautiful:
- Free and without ads
- Very Nice Reader. So tasty!
- Read vertically or horizontally as you prefer:)
- Comfortable reading of text and an excellent picture viewing
- Beautiful library with a progress of reading books, searching and sorting
- Search throw the text of the document – now you will find all

Fast, simple and clear:
- Easy and intuitive. Just downloaded and read
- Easy download of files to the reader
- Quick file access. Even for large files!
- Add files from clouds, browsers, or any application

Pure pleasure:
- You can draw directly on the document
- You can quickly remove anything that you drew :)
- Also there are text notes and bookmarks to mark…