Adobe released Lightroom mobile for Android phones last night, after releasing the Apple iPhone / iPad version nine months ago. The app is free from your Google Play app store, but using it requires a Creative Cloud subscription. You can now:
- Sync collections of photos from your desktop Lightroom catalog to the Lightroom mobile app.
- Import phone camera photos from your Gallery into Lightroom mobile and have them automatically sync back to your Lightroom desktop catalog.
- Perform rating, flagging and basic Develop work in Lightroom mobile and have this work sync back to your Lightroom desktop catalog.
- Share photos directly from Lightroom mobile.
While I don’t have Android-specific tutorials, the following videos will show you the basics of using Lightroom mobile and syncing to and from Lightroom on your Desktop:
Introduction of Lightroom mobile (initially for the iPad with Lightroom 5.4)
For best quality, hit Play, then click on the Youtube sprocket wheel 
in the bottom right and choose 720/HD.
in the bottom right and choose 720/HD.