Gradle依赖管理Tip

Gradle的使用资料网上有的已经够多了，不一一赘述。
这里只说一个方便依赖管理的Tip：

1. 在项目(Project)定义全局变量(ext)

def String supportVersion = "25.+"
def String frescoVersion = "1.2.0"
ext {
    compileCommon = ([
            "com.android.support:appcompat-v7:${supportVersion}",
            "com.android.support:support-v13:${supportVersion}",
            "com.android.support:design:${supportVersion}",
            "com.android.support:percent:${supportVersion}",
            "com.google.code.gson:gson:+",
            "com.facebook.fresco:fresco:${frescoVersion}",
            "com.facebook.fresco:animated-gif:${frescoVersion}",// For animated GIF support
            "com.facebook.fresco:animated-webp:${frescoVersion}",// For WebP support, including animated WebP
            "com.facebook.fresco:imagepipeline-okhttp3:${frescoVersion}",
            "com.squareup.okhttp3:okhttp:+",
            "com.squareup.okio:okio:+",
    ])
    compileTest = 'junit:junit:4.12'
}

2. 在模块(Module)引用依赖

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile(rootProject.ext.compileCommon)
    compile([
            'com.jcodecraeer:xrecyclerview:1.3.2',
            'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:1.0.2',// 微信SDK,
            'com.google.zxing:core:3.3.0',
            'com.github.mcxtzhang:SwipeCaptcha:V1.0.0'
    ])
    testCompile rootProject.ext.compileTest
}