The FastAdapter is here to simplify this process. You don't have to worry about the adapter anymore. Just write the logic for how your view/item should look like, and you are done. This library has a fast and highly optimized core which provides core functionality, most apps require. It also prevents common mistakes by taking away those steps from the devs. Beside being blazing fast, minimizing the code you need to write, it is also really easy to extend. Just provide another Adapter implementation, hook into the adapter chain, custom select / deselection behaviors. Everything is possible.

A quick overview:
- Click / Long-Click listeners
- Selection / Multi-Selection
- Expandable items
- Write less code, get better results
- Simple Drag & Drop
- Headers
- Footers
- Highly optimized code
- Includes suggestions from the Android Team
- Easily extensible
- Chain other Adapters
- Comes with useful Helpers
-- ActionModeHelper
-- More to come...

https://github.com/mikepenz/FastAdapter

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.