使用Android Studio打包指定名称的Apk

在网上找了一些，很多都有错误，因为没有研究过gradle的语法，下面给出一个可用的方法，在build.gradle(module:app)中的android中添加：

android.applicationVariants.all { variant ->        variant.outputs.all { output ->            def outputFile = output.outputFile            if (outputFile != null && outputFile.name.endsWith('.apk')) {                outputFileName = "MyApk" + "_" + releaseTime() + ".apk"            }        }    }

其中在gradle文件最外层中定义releaseTime()方法(当然也可以不要这个数据，可根据自己的规则命名)：

def releaseTime() {    return new Date().format("yyyyMMdd", TimeZone.getTimeZone("UTC"))}

比如这样一个完整的gradle文件如下：

apply plugin: 'com.android.application'def releaseTime() {    return new Date().format("yyyyMMdd", TimeZone.getTimeZone("UTC"))}android {    compileSdkVersion 26    defaultConfig {        applicationId "cn.readsense.fx1000_sample"        minSdkVersion 21        targetSdkVersion 26        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"        externalNativeBuild {            cmake {                cppFlags "-std=c++11"            }        }        ndk {            abiFilters 'armeabi-v7a'        }    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }    sourceSets {        main {            jniLibs.srcDirs = ['libs']        }    }    android.applicationVariants.all { variant ->        variant.outputs.all { output ->            def outputFile = output.outputFile            if (outputFile != null && outputFile.name.endsWith('.apk')) {                outputFileName = "MyApk" + "_" + releaseTime() + ".apk"            }        }    }}tasks.withType(JavaCompile) {    options.encoding = "UTF-8"}dependencies {    implementation fileTree(include: ['*.jar'], dir: 'libs')    implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'    implementation 'com.android.support.constraint:constraint-layout:1.1.2'    testImplementation 'junit:junit:4.12'    androidTestImplementation 'com.android.support.test:runner:1.0.2'    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'}

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