I'm trying to build an apk of my kivy project.
I have installed buildozer in python 2.7 Using PyCharm, then I built the `.spec`,
but when I tried to create the apk, I got these results:
i have insatalled jdk7 and 8

1. Using: `buildozer Android debug`

```
#Check configuration tokens
# Ensure build layout
# Check configuration tokens
# Preparing build
# Check requirements for android
# Java compiler (javac) not found, please install it.

```
2. Using:  `buildozer -v Android debug`

```
# Check configuration tokens
# Ensure build layout
# Check configuration tokens
# Read available permissions from api-versions.xml
# Preparing build
# Check requirements for android
# Run 'dpkg --version'
# Cwd None
/bin/sh: dpkg: comando non trovato
# Search for Git (git)
#  -> found at /usr/bin/git
# Search for Cython (cython)
#  -> found at /usr/bin/cython
# Search for Java compiler (javac)
# Java compiler (javac) not found, please install it.

```
3. Using: `buildozer Android debug deploy run`

```
# Check configuration tokens
# Ensure build layout
# Check configuration tokens
# Preparing build
# Check requirements for android
# Java compiler (javac) not found, please install it.

```

How do I get this to work?