Im trying to install ROS Kinetic on my Raspberry Pi which is running Raspbian stretch.
When i enter
sudo apt-get install ros-kinetic-desktop-full
it returns
E: Unable to locate package ros-kinetic-desktop-full
I also tried to install ROS without apt-get but then i need to install all packages like rviz en rqt myself by cloning them from git, and i want to do that with apt-get
Have you followed the installation manual (http://wiki.ros.org/kinetic/Installation/Debian). For me it looks like you either never updated your sources list or you did it but never updated your package index.
You have to:
sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list')sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654)sudo apt-get update)before you can start installing the package.
EDIT: ROS Kinetic only supports jessie. You can try if sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu jessie main" > /etc/apt/sources.list.d/ros-latest.list' works but there is absolutely no guarantee for it. You better should build ROS from source (http://wiki.ros.org/kinetic/Installation/Source)
For kinetic you should be working on Wily (Ubuntu 15.10), Xenial (Ubuntu 16.04) and Jessie (Debian 8) for debian packages.
Install melodic if you are using updated one.
