targetSdkVersion gradle 奇怪的值

问题描述

所以，我从 Github 克隆了这个项目，在浏览它的 build.gradle 时，我发现了这个奇怪的配置，特别是对于 targetSdkVersion.现在，在我详细介绍它是什么之前，让我提一下该项目有两个模块 - app(主要模块)和 callrecord(封装通话录音功能)

这是相同的 build.gradle 文件:

应用插件:'com.android.application'安卓 {compileSdkVersion project.sdk默认配置{applicationId "com.aykuttasil.callrecorder"minSdkVersion project.minSdktargetSdkVersion project.sdk版本代码 1版本名称1.0"testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"}构建类型{释放 {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'}}}依赖{编译文件树(包括:['*.jar']，目录:'libs')androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {排除组:'com.android.support'，模块:'support-annotations'})编译com.android.support:appcompat-v7:$supportVersion"testCompile 'junit:junit:4.12'编译项目(':callrecord')}

你能看到吗?

我不明白 compileSdkVersion project.sdk 这一行.这个项目对象"也在其他几个地方被引用.

首先，为什么会有人使用这个属性?其次，我如何知道它是什么版本?

解决方案

• 使用此属性的主要目的是在一个地方配置 Android 项目模块的所有变量
• 所以在一个地方改变它会影响整个项目

我如何知道它是什么版本?

• 它将在 gradle.properties 或 build.gradle 文件中提供

查看

样本

这是关于它的好文章

然后在您的 Build.Gradle

中使用

android {compileSdkVersion project.myTargetSdkVersion.toInteger()默认配置{applicationIdcom.example.nilesh.myapplication"minSdkVersion project.myMinSdkVersion.toInteger()targetSdkVersion project.myTargetSdkVersion.toInteger()版本代码 1版本名称1.0"testInstrumentationRunnerandroid.support.test.runner.AndroidJUnitRunner"}构建类型{释放 {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'}}编译选项{目标兼容性 1.8源兼容性 1.8}}

So, I cloned this project from Github and while going through its build.gradle, I found this strange configuration, particularly for targetSdkVersion. Now, before I jump into the details of what it is, let me mention that the project has two modules - app(the main one) and callrecord(encapsualting the call recording functionality)

Here is the build.gradle file for the same:

apply plugin: 'com.android.application'

android {
    compileSdkVersion project.sdk

    defaultConfig {
        applicationId "com.aykuttasil.callrecorder"
        minSdkVersion project.minSdk
        targetSdkVersion project.sdk
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile "com.android.support:appcompat-v7:$supportVersion"
    testCompile 'junit:junit:4.12'
    compile project(':callrecord')
}

Can you see it?

I don't understand the line compileSdkVersion project.sdk. This project "object" has been referenced at several other places too.

First, why would someone use this property? Second, how do I find out what version it is?

解决方案

• The main purpose behind to use this property To Configure all variables for Android project modules in one place
• so changing it in one place will effect in whole project

• it will be available in gradle.properties or build.gradle in file

have a look in Build.Gradle file of CallRecorder of that project

SAMPLE

Here is the good article on it Configure variables for all Android project modules in one place

# Project-wide Gradle settings.
# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.
# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
org.gradle.jvmargs=-Xmx1536m
android.useAndroidX = true
android.enableJetifier = false

#gradle.properties
myTargetSdkVersion=27
myCompileSdkVersion=27
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true

android {
    compileSdkVersion project.myTargetSdkVersion.toInteger()
    defaultConfig {
        applicationId "com.example.nilesh.myapplication"
        minSdkVersion project.myMinSdkVersion.toInteger()
        targetSdkVersion project.myTargetSdkVersion.toInteger()
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        targetCompatibility 1.8
        sourceCompatibility 1.8
    }
}

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