[移动开发]最全app build.gradle常用语法

1.增加签名文件

    signingConfigs {
        sign_q {
            keyAlias 'key1'
            keyPassword '111111'
            //签名文件
            storeFile file('storefile/sskey.jks')
            storePassword '111111'
        }
    }
    
        buildTypes {
        release {
            // 打包时去除无用的资源
            shrinkResources true
            minifyEnabled false
             //混淆
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            对release 版本用sskey.jks文件签名
            signingConfig signingConfigs.sign_q
        }
        debug {
            minifyEnabled false
            signingConfig signingConfigs.sign_q
        }
        
    }

对于android 系统中，如何制作系统签名jks,可以参考我这篇文章 各位大佬都是怎么开发调试系统应用的

2.输出特定apk名称

    android.applicationVariants.all { variant ->
        variant.outputs.all {
            //将apk输出到outputs 下
            variant.getPackageApplication().outputDirectory = new File(project.rootDir.absolutePath + File.separator + "outputs")
            //编译生成的apk 名字为 appname_release_20211019.apk
            def apkName = "${variant.productFlavors.name}_${variant.buildType.name}_${variant.productFlavors[0].versionName}"
            outputFileName = apkName + ".apk"
        }
    }

3.分渠道编译

可参考另一篇文章android 差异化多渠道打包

    flavorDimensions "os_backup"
    productFlavors {
        os_backup {
            applicationId 'com.test.backup'
            versionCode 2
            versionName "2.0".concat("_").concat(releaseTime())
        }

        os_phoneclone {
            applicationId 'com.test.phoneclone'
            versionCode 4
            //这里可以动态管理apk版本号
            versionName "2.0".concat("_").concat(releaseTime())
            minSdkVersion 21
        }
    }
//可以自定义加方法
def releaseTime() {
    return new Date().format("yyyyMMdd", TimeZone.getTimeZone("UTC"))
}

4.选择性打包

  defaultConfig {
        applicationId "com.example.miracastdemo"
        minSdkVersion 28
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
      //为了包体积优化，这里可以选择性的打包资源和语言
        resConfigs("xxhdpi","xxxhdpi")
        resConfigs("en","zh","zh-rCN")
        ndk {
            abiFilters 'armeabi-v7a'
        }
    }

sourceSets {
    //当分渠道编译时，可以选择性的编译不同的资源文件或者代码文件等等。
        os_backup {
            res.srcDirs = ['res']
            java.srcDirs = ['src', 'src_plugins']
            manifest.srcFile 'AndroidManifest-common.xml'
        }
       os_phoneclone {
            res.srcDirs = ['res']
            java.srcDirs = ['src', 'src_plugins']
            manifest.srcFile 'AndroidManifest-common.xml'
        }
        }

5 .引入依赖

    implementation 'android.arch.lifecycle:extensions:1.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    // 引入libs 下的所有jar 包和aar 包
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation fileTree(include: ['*.aar'], dir: 'libs')
    //noinspection GradleCompatible,GradleCompatible
    implementation 'com.android.support:support-v13:26.1.0'
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:recyclerview-v7:26.1.0'
    // 引入libs单个的aar 包
    compile(name: 'zxing-android-embedded-3.6.0', ext: 'aar')
    compile(name: 'lottie-2.7.0', ext: 'aar')

6.混淆

      buildTypes {
        release {
            minifyEnabled false
            //混淆
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.sign_wingos_q
        }
        debug {
            minifyEnabled false
            signingConfig signingConfigs.sign_wingos_q
        }
        
    }

7. android.mk 中选择性文件打包

LOCAL_PATH := $(call my-dir)include$(CLEAR_VARS)# 是否开启混淆
LOCAL_PROGUARD_ENABLED := disabled
LOCAL_DEX_PREOPT:=false
LOCAL_MODULE_TAGS := optional

LOCAL_CERTIFICATE := platform

LOCAL_STATIC_ANDROID_LIBRARIES := \
        android-support-v7-appcompat \
        android-support-v17-leanback 

LOCAL_STATIC_JAVA_LIBRARIES := \
        com.mediatek.support.tv \
        androidx.annotation_annotation
LOCAL_PRIVATE_PLATFORM_APIS := true
// mk 打包时选择性的引入对应的文件
LOCAL_SRC_FILES := $(call all-java-files-under, app/src/main/java)
LOCAL_ASSET_DIR := $(LOCAL_PATH)/app/src/main/assets
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/app/src/main/res
LOCAL_MANIFEST_FILE := app/src/main/AndroidManifest.xml
LOCAL_PACKAGE_NAME := Demo