start_docker.sh

#!/bin/bash
export image_name="android:5.0"
export container_name=${USER}_${image_name}
if [ ! "$(docker ps -q -f name=${container_name})" ]
then
    if [ "$(docker ps -aq -f status=exited -f name=${container_name})" ]; then
        # cleanup
        docker rm ${container_name}
    fi
    # run your container
    docker run --name ${container_name} -it --entrypoint /bin/bash -v /home/${USER}:/home/${USER} ${image_name}
else
    docker exec -it "$(docker ps -q -f name=${container_name})" bash
fi