Gradle可以把module的Android、dependence等各種配置提取到一個(gè)單獨(dú)的文件統(tǒng)一管理，非常方便。步驟如下：

1. 在和項(xiàng)目build.gradle相同的目錄下新建一個(gè)gradle文件，例如common.gradle

ext {
    android = [
            applicationId    : "com.example.gradledemo",
            minSdkVersion    : 21,
            compileSdkVersion: 28,
            targetSdkVersion : 28,
            versionCode      : 1,
            versionName      : "1.0",
    ]

    signConfig = [
            'storeFile'    : 'xxx.jks',
            'storePassword': '123',
            'keyAlias'     : 'Zxz',
            'keyPassword'  : '123',
    ]

    dependence = [
            'supportV7': 'com.android.support:appcompat-v7:28.0.0'
    ]
}

2. 在項(xiàng)目的build.gradle中引入改文件

apply from: file('common.gradle')

3. 在module的build.gradle中使用ext屬性

android {
    compileSdkVersion rootProject.ext.android.compileSdkVersion
    defaultConfig {
        applicationId rootProject.ext.android.applicationId
        minSdkVersion rootProject.ext.android.minSdkVersion
        targetSdkVersion rootProject.ext.android.targetSdkVersion
        versionCode rootProject.ext.android.versionCode
        versionName rootProject.ext.android.versionName
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    //...
}

dependencies {
    implementation rootProject.ext.dependence.supportV7
    //...