咁我依個新手咪上Google揾下,原來個JAVA_HOME 條Path set得唔啱,之前set咗幾次都係用依條Path:
JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.91-2.b14.fc23.x86_64
原來係係條先啱: JAVA_HOME=/usr/java/jdk1.8.0_91

要個'jdk1.8.0_91' folder入面個'lib' folder入面有個tools.jar檔果嗰先係,又搞咗成日 *_*!
裝32bit留意官網的command: https://developer.android.com/studio/install.html