In order to improve the efficiency of project development, some open source frameworks are often introduced in the actual project development process, as well as various modules used in the project. When too many modules are introduced, it is better to provide a unified way to manage version numbers, such as compileSdkVersion, buildToolsVersion, and Android testcompile It is convenient to maintain the version number in the future. Here is a way to deal with the above problems.

The method is as follows:

1.1 add ext { Content in.}

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

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

ext {
    /*SDK And Tools(SDK And tools)*/
    //SDK version for compilation
    compileSdkVersion = 26
    //Tool version for Gradle compilation project
    buildToolsVersion = "26.0.1"
    //Android version minimum supported
    minSdkVersion = 15
    //Target version
    targetSdkVersion = 26
    //Application version number
    versionCode = 100
    //Application version name
    versionName = "1.0.0"

    /*Dependencies(Dependency)*/
    supportLibVersion = "26.0.0-alpha1"
}

1.2 use in build.gradle under app Directory:

• 1.2.1 rootProject.ext.compileSdkVersion{......}
• 1.2.2 $rootProject.supportLibVersion

apply plugin: 'com.android.library'

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode rootProject.ext.versionCode
        versionName rootProject.ext.versionName
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile "com.android.support:appcompat-v7:$rootProject.supportLibVersion"
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
}

Download address:

https://download.csdn.net/download/lvluffy/10318038