When I run ionic build android command in root of ionic project, I am getting this error:
FAILURE: Build failed with an exception.
This works for me! be careful with the new java versions because they cause error, check that you have everything installed and in your specific directory,
I did not use openJDK
export JAVA_HOME="/usr/lib/jvm/java-8-jdk" \
&& export PATH=$JAVA_HOME/bin:$PATH \
&& export ANDROID_HOME=$HOME/Android/Sdk \
&& export PATH=${PATH}:${ANDROID_HOME}/tools \
&& export PATH=${PATH}:${ANDROID_HOME}/platform-tools \
&& export GRADLE_HOME=/usr/share/java/gradle/bin/gradle \
export PATH=$PATH:$GRADLE_HOME/bin
Linux 4.14.39-1-MANJARO #1 SMP PREEMPT Wed May 2 19:03:39 UTC 2018 x86_64 GNU/Linux