本文介绍了Gradle脚本常用功能实现，包括任务的定义、添加依赖、指定任务执行顺序、复制文件、复制并重命名文件、从FTP下载文件、解压Zip文件、操作数据库文件等功能。
本文首发：http://yuweiguocn.github.io/
《望庐山瀑布》
日照香炉生紫烟，遥看瀑布挂前川。
飞流直下三千尺，疑是银河落九天。
—唐，李白
定义任务
task myTask {
doFirst {
println "my task is execuated"
}
}
添加依赖
task myFirstTask {
doFirst {
println "my first task is execuated"
}
}
task mySecondTask {
doFirst {
println "my second task is execuated"
}
}
task myTask(dependsOn: [myFirstTask,mySecondTask]) {
doFirst {
println "my task is execuated"
}
}
添加依赖2
task myFirstTask {
doFirst {
println "my first task is execuated"
}
}
task mySecondTask {
doFirst {
println "my second task is execuated"
}
}
task myTask {
doFirst {
println "my task is execuated"
}
}
myTask.dependsOn myFirstTask
myTask.dependsOn mySecondTask
添加依赖3
当任务为动态创建时，我们无法使用上面的方法添加依赖，指定执行顺序，可以使用下面的方法进行处理：
tasks.whenTaskAdded { task ->
if (task.name == "tinkerPatchRelease") {
myTask.dependsOn task
task.mustRunAfter myFirstTask
}
}
指定任务执行顺序
task myFirstTask {
doFirst {
println "my first task is execuated"
}
}
task mySecondTask {
doFirst {
println "my second task is execuated"
}
}
task myTask(dependsOn: [myFirstTask,mySecondTask]) {
doFirst {
println "my task is execuated"
}
}
mySecondTask.mustRunAfter myFirstTask
执行命令：
./gradlew myTask
执行结果：
:app:myFirstTask
my first task is execuated
:app:mySecondTask
my second task is execuated
:app:myTask
my task is execuated
复制文件
task copyTask(type: Copy){
from FilePath
into DistDirPath
}
复制并重命名文件
task copyTask(type: Copy) {
from FilePath
into DistDirPath
rename { String fileName ->
newName
}
}
从FTP下载文件
def ftp_url = "*******"
def ftp_username = "*******"
def ftp_password = "*******"
def ftp_local_dir = "/***/***"
def ftp_dir = "/***/***/***/***"
configurations {
ftpAntTask
}
dependencies {
ftpAntTask("org.apache.ant:ant-commons-net:1.8.4") {
module("commons-net:commons-net:1.4.1") {
dependencies "oro:oro:2.0.8:jar"
}
}
}
task downLoadBaseApk {
doLast {
ant.taskdef(name: 'ftp',
classname: 'org.apache.tools.ant.taskdefs.optional.net.FTP',
classpath: configurations.ftpAntTask.asPath)
ant.ftp(server: ftp_url, userid: ftp_username, password: ftp_password, remoteDir: ftp_dir, verbose: "yes",passive: "yes",action: "get") {
fileset(dir: ftp_local_dir)
}
}
}
解压Zip文件
task unzipHC(type: Copy) {
from zipTree(ZipFilePath)
into DistDirPath
}
操作数据库文件
我们可以使用ATTACH语句附加额外的数据库到当前数据库，使用REPLACE语句复制表记录到当前数据库表中，如果出现重复记录会被替换，而不是报错。如果使用INSERT INTO语句出现重复记录时会报sql异常。
configurations {
sqllite
}
repositories {
mavenCentral()
}
dependencies {
sqllite 'org.xerial:sqlite-jdbc:3.8.9.1'
}
URLClassLoader loader = GroovyObject.class.classLoader
configurations.sqllite.each { File file ->
loader.addURL(file.toURL())
}
task exeSql {
doLast {
Sql sql = Sql.newInstance("jdbc:sqlite:app/src/main/res/raw/data.db", "org.sqlite.JDBC")
sql.eachRow("SELECT count(*) FROM MyTable") { row ->
println "-->MyTable count is " + row.toString()
}
sql.execute("DELETE FROM MyTable")
sql.withTransaction {
sql.execute("DELETE FROM MyTable")
}
def attach_db = "mydb"
//附加数据库
sql.execute("ATTACH DATABASE ? AS "+attach_db,[dbPath])
//从附加的数据库中的表中复制记录到当前数据库的表中
sql.execute("REPLACE INTO MyTable SELECT * FROM "+attach_db+".MyTable")
sql.execute("DETACH DATABASE ?",[attach_db])
sql.close()
}
}
