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在Android中引入Java8的lambda表达式
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我用的是retrolambda这个插件，下面来说下如何添加它。
项目地址：https://github.com/evant/gradle-retrolambda
在根项目的build.gradle中添加这个classpath
classpath 'me.tatarka:gradle-retrolambda:3.2.0'//retrolambda
example：
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.2.3'
classpath 'me.tatarka:gradle-retrolambda:3.2.0'//retrolambda
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
然后，在项目的bulid.gradle中添加插件，并让其使用java8
apply plugin: 'com.android.application'
apply plugin: 'me.tatarka.retrolambda' android {
compileSdkVersion rootProject.compileSdkVersion
buildToolsVersion rootProject.buildToolsVersion defaultConfig {
applicationId "kale.androidframework"
minSdkVersion rootProject.minSdkVersion
targetSdkVersion rootProject.targetSdkVersion
versionCode Integer.parseInt(project.VERSION_CODE)
versionName project.VERSION_NAME
} buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
} lintOptions {
checkReleaseBuilds false
// Or, if you prefer, you can continue to check for errors in release builds,
// but continue the build even when errors are found:
abortOnError false
} compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
} retrolambda {
javaVersion JavaVersion.VERSION_1_7
} //设置编码
tasks.withType(JavaCompile) {
options.encoding = "UTF-8"
} dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
}
如果你用到了多个lib库，需要在每个lib中进行添加：
apply plugin: 'me.tatarka.retrolambda'
android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
