Seems you have a missing GPG key for the required package(s).
You are seeing this issue because
apt cannot find a matching GPG key for the required package(s) installed on your system (maybe
ubuntu-make ppa added correctly, but an error occurred when adding signing key¿?).
As a personal advice, i would consider always first using the default software channels, and only add a ppa if there is any special requirement(s) which default software doesn't cover.
Adding/retrieving GPG key(s) from keyserver.ubuntu.com
You can check if that certain GPG key exist in keyserver.ubuntu.com and automatically add it to your system. To do this simply run this on your terminal:
sudo apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 1BE1E8D7A2B5E9D5
If the key exists, it will be added to your system and you'll be able to install
sudo apt install ubuntu-make.
Reverting your system (removing the ppa)
If no packages were installed/changed, you can simply remove the ppa (repo) file and entry from apt sources, running the following command on your terminal:
sudo rm /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list*
However I'll always suggest best using
ppa-purge (you can install it with
sudo apt install ppa-purge), which in addition to remove the sources entry, it also removes the added keys and does all other genuflections, like reverting packages to their equivalent on the main repos (if any were installed).
Run this on your terminal to remove and purge ubuntu-make ppa using
sudo ppa-purge ppa:ubuntu-desktop/ubuntu-make
Tip: You can use bash autocompletion with Tab to fill ppa name.
Hope it helps.
If you use the Ubuntu Make snap to ensure you always have the latest and greatest version, even on older supported releases.
snap install ubuntu-make --classic
Umake can then be run as
Run Ubuntu Make:
snap run ubuntu-make.umake android
To install Android Studio in Ubuntu 16.04 ,You need the latest version of umake which is 16.05 . Check your umake version using
you need to not, install umake from the standard ubuntu repositories, instead add ubuntu-desktop repository to get latest umake version. Add repository by
Update software Source
Now install/upgrade umake
Now install Android Studio by