[gradle] build gradle project without install gralde on linux

添加如下訊息到你的 builde.gradle中
 task wrapper(type: Wrapper) {
    gradleVersion = '2.3'
} 

執行gradle wrapper

在你linux環境的該專案下執行指令

./gradlew

./gradlew build

if you want install you can link to
http://exponential.io/blog/2015/03/30/install-gradle-on-ubuntu-linux/