build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath 'com.novoda:bintray-release:0.4.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
    allprojects {
        tasks.withType(JavaCompile) {    //设置全局编码
            options.encoding = "UTF-8"
        }
        tasks.withType(Javadoc) {  //设置文档编码
            options {
                encoding "UTF-8"
                charSet 'UTF-8'
                links "http://docs.oracle.com/javase/7/docs/api"
            }
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}