Jenkins集成Android apk编译的条件如下：

1、服务器上安装好jenkins，配置好Android sdk，build tools，gradle，Android sdk需要配置ANDROID_HOME环境变量，gradle也需要配置环境变量；

2、复制代码路径可以到app层级，将project目录下的build.gradle里面内容直接复制粘贴到app目录下的build.gradle文件前面即可。由于服务器的环境(keystore存放路径)可能和本地不一致，所以一般新建一个jenkins.gradle文件，这个文件专门用于服务器构建app使用，本地使用还是app目录下的build.gradle

3、编译apk的命令如下(已配置环境变量)：

gradle -b jenkins.gradle build

4、jenkins.gradle示例如下：

import org.tmatesoft.svn.core.wc.*
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.1.2"
        classpath group: 'org.tmatesoft.svnkit', name: 'svnkit', version: '1.8.11'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io" }//这就是添加的
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 22
        targetSdkVersion 22
        versionCode 1
        versionName "V1.0.0"
    }

//    applicationVariants.all { variant ->
//        variant.outputs.each { output ->
//            if (output.outputFile != null && output.outputFile.name.endsWith('.apk')) {
//                output.outputFile = file("${output.outputFile.parent}/AndroidPlugin" +
//                        "-${variant.buildType.name.toLowerCase()}" +
//                        "_R${getSvnRevision()}_${releaseTime()}" +
//                        ".apk")
//            }
//        }
//    }

    applicationVariants.all { variant ->
        variant.outputs.all { output ->
            def outputFile = output.outputFile
            if (outputFile != null && outputFile.name.endsWith('.apk')) {
                def fileName = "AndroidPlugin" + "-${variant.buildType.name.toLowerCase()}" +
                        "_R${getSvnRevision()}_${releaseTime()}_${getVersionName()}" +
                        ".apk"
                outputFileName = fileName
            }
        }
    }

    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }

    signingConfigs {
        release {
            storeFile file("/home/jenkins/android/application.keystore")
            storePassword 'xxx'
            keyAlias 'xxx'
            keyPassword 'xxx'
        }
        debug {
            storeFile file("/home/jenkins/android/application.keystore")
            storePassword 'xxx'
            keyAlias 'xxx'
            keyPassword 'xxx'
        }
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:25.3.1-alpha1'
    implementation 'com.android.support:design:25.3.1'
    configurations.all {//不加这配置会出现Resolved versions for app (25.1.0) and test app (27.1.1) differ
        resolutionStrategy.force 'com.android.support:support-annotations:26.1.0'
    }
    testImplementation 'junit:junit:4.12'
    testImplementation 'androidx.test.ext:junit:1.0.0-beta02'
    testImplementation 'androidx.test:runner:1.1.0-beta02'
    //butterknife
    implementation 'com.jakewharton:butterknife:10.0.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:10.0.0'

    //rxjava
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
    implementation 'io.reactivex.rxjava2:rxjava:2.2.0'
    //retrofit
    implementation 'com.squareup.retrofit2:retrofit:2.4.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava:2.4.0'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.4.0'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.11.0'
    //exoplayer
    implementation 'com.google.android.exoplayer:exoplayer:2.8.1'
    implementation 'com.google.android.exoplayer:exoplayer-core:2.8.1'
    //分页
    compile 'com.github.Aspsine:SwipeToLoadLayout:1.0.4'
}

def releaseTime() {
    return new Date().format("yyyyMMddHHmmss")
}

def getVersionName(){
    return android.defaultConfig.versionName
}

def getSvnRevision() {
    ISVNOptions options = SVNWCUtil.createDefaultOptions(true);
    SVNClientManager clientManager = SVNClientManager.newInstance(options);
    SVNStatusClient statusClient = clientManager.getStatusClient();
    SVNStatus status = statusClient.doStatus(projectDir, false);
    SVNRevision revision = status.getCommittedRevision();
    return revision.getNumber();
}

5、如果编译过程中，报错，提示jenkins.gradle不是项目一部分，请修改settings.gradle文件，则可以把project下的settings.gradle放到app目录下；

6、如果编译过程中，报错，提示找不到androidx，可以把project下的gradle.properties放到app目录下

7、以下是gradle3.3版本使用的设置文件名的方式，如果使用高版本gradle，请参考jenkins.gradle的配置

//    applicationVariants.all { variant ->
//        variant.outputs.each { output ->
//            if (output.outputFile != null && output.outputFile.name.endsWith('.apk')) {
//                output.outputFile = file("${output.outputFile.parent}/AndroidPlugin" +
//                        "-${variant.buildType.name.toLowerCase()}" +
//                        "_R${getSvnRevision()}_${releaseTime()}" +
//                        ".apk")
//            }
//        }
//    }