For you as an Android user, don't bother downloading additional scanning applications. The Google Drive application can now be used as a document scanner. You can save it in PDF format on your Google Drive. Here's how:
1. Run the Google Drive application
2. At the bottom right, press Add (Add)
3. Next, select the Scan option
4. Take a photo of the document or file you want to scan.
5. Then adjust the scanning area by pressing Crop.
6. Take another photo then press Re-scan page Re-scan current page
7. If you want to scan another page, press Add (Add)
8. Next, save the completed document, press Done.