Ever wanted that useful Google Now swipes to access search from anywhere, but you can't because you have hardkeys? If so, then SwipeBubble is totally for you.
SwipeBubble backports Android Lollipop navigation bar swipes to all devices with hardkeys (mainly Samsung devices) running Android Ice Cream Sandwich (4.0) or above.
With SwipeBubble, you can do many functions:
-Launch Google search (or any assistant application, such as Swipeup Utility, or App Swap)
-Take an instant photo without opening the camera app
-Play/pause active music (music must be running in order to make use of this feature; supports almost all music players, including YouTube)
-Launch any installed app
-Lock off screen
-Take screenshot (needs rooted device)
-You can set actions in per-app basis.
-Choose from 100+ icons to change the bubble logo
-Custom colors and Auto-tenting mode
-Change size and sensitivity of gesture detection area
-Draw on apps to show the bubble everywhere
-Start on boot
-Camera permission for instant pictures action
-Storage access to save screenshots and pictures
-Get running apps to dynamically change bubble color based on the active app's icon. Might not match exactly, especially if you were using icon pack with phones that support system-wide icon pack support.
Material icon pack by Google. Screenshots were taken using a phone running Lollipop, app might appear different on different phones and manufacturers' UIs, but functionality is the same. You might need root permission to activate some functions.
SwipeBubble - Swipe gestures Screenshots