KeyMapper

Key Mapper is a free and open source Android app that can remap your buttons and fingerprint reader gestures. The aim of this project is to allow anyone to map their buttons in any combination to anything. You can combine multiple keys from a specific device or from any device to form an "activator". Each activator can have multiple actions. The keys can be configured to be pressed at the same time or one after another in a sequence. Keys can be reassigned when pressed briefly, pressed long, or pressed twice. A key map can have a set of "restrictions" so that it only takes effect in certain situations.