Important: For Marshmallow (Android 6), it is possible to disable the assist feature.
Follow below steps:
(1) goto "Settings > Apps > Advanced (the small gear icon) > Default Apps > Assists & voice input"
(2) select "none"
My thanks to robojumper for the above information.
As of Jelly Bean, it is possible to quick launch an app (Google Now by default) by a swipe up gesture from the navigation bar, this feature can be annoying.
This app is developed to "disable" this feature. Actually the feature is not disabled, but instead launches this app that does nothing.
*** Important notes ***
This app does not provide a launch icon in the app drawer, so it is not possible to uninstall it in the conventional way.
Can use below methods to uninstall:
(1) Use an uninstaller app, there are many on Play Store, and AppWererabbit is a good choice.
(2) Goto "Settings > Apps > ALL", locate "SwipeLaunch Disabler", select to uninstall from App info screen.
This app may not be applicable to devices with a physical HOME button, mostly Samsung devices.
On devices with physical HOME button, long pressing the HOME button is equivalent to swipe launch action on buttonless devices, which maybe less prone to launching of Google Now by mistake.
The "semi-circle ring" on pre-Lollipop and "exploding circle" on Lollipop is animation prior to launching this app, therefore, out of control of this app.
SwipeLaunch Disabler is a free software application from the System Maintenance subcategory, part of the System Utilities category.
The app is currently available in English and it was last updated on 2015-04-02. The program can be installed on Android.
SwipeLaunch Disabler (version 0.4.0) is available for download from our website.
Just click the green Download button above to start. Until now the program was downloaded 13 times.
We already checked that the download link to be safe, however for your own protection we recommend that you scan the downloaded software with your antivirus.
Here you can find the changelog of SwipeLaunch Disabler since it was posted on our website on 2014-06-13.
The latest version is 0.4.0 and it was updated on soft112.com on 2018-03-22.
See below the changes in each version: