Java compiling issue: buildozer uses obsolete source value 1.5

[saband]

I'm trying to compile project with Facebook SDK and there is an error:

DEBUG: [javac] Compiling 154 source files to /home/saband/python/kivy/Simple-Facebook-Login-on-Kivy/facebook-android-sdk-4.5.1/facebook/bin/classes
DEBUG: [javac] warning: [options] source value 1.5 is obsolete and will be removed in a future release
DEBUG: [javac] warning: [options] target value 1.5 is obsolete and will be removed in a future release
DEBUG: [javac] warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
DEBUG: [javac] /home/saband/python/kivy/Simple-Facebook-Login-on-Kivy/facebook-android-sdk-4.5.1/facebook/src/com/facebook/AccessToken.java:559: error: diamond operator is not supported in -source 1.5
DEBUG: [javac] ArrayList permissionsList = new ArrayList<>();
DEBUG: [javac] ^
DEBUG: [javac] (use -source 7 or higher to enable diamond operator)

Full log (level 2) here: https://pastebin.com/mADD63ex

I have openjdk-8-jdk installed and I don't know why buildozer uses source 5 and how to correct it (where I can "use -source 7 or higher" as recommended.

[inclement]

Are you using python-for-android master, and a recent SDK? I think p4a sets a more appropriate source value in this case.

[saband]

I'm sorry, it's really issue of SDK. How to fix it: open android-sdk-21/tools/ant/build.xml and change

<property name="java.target" value="1.5" />
<property name="java.source" value="1.5" />