Android studio支持lamda

https://www.jianshu.com/p/ef6cbf5ade71

方法一：11.25新建的项目

app的build.gradle下面：

android {
    //只需要这样就行了
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    ...
    defaultConfig {
        ...
    }
    ....
}

我的项目所有:

app build.gradle如下：

apply plugin: 'com.android.application'
apply plugin: 'com.alipay.apollo.baseline.config'

android {
    //支持lamda
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    compileSdkVersion 30
    buildToolsVersion "30.0.2"

    defaultConfig {
        applicationId "com.zhu.mpaas"
        minSdkVersion 19
//        接入第1步
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        ndk{
            abiFilters 'armeabi'
        }
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro','mpProguard.cfg'
        }
    }
}

dependencies {
    implementation 'androidx.multidex:multidex:2.0.1'
    implementation platform("com.mpaas.android:$mpaas_artifact:$mpaas_baseline")
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    implementation 'com.mpaas.android:essential'
    implementation 'com.mpaas.android:framework'
    implementation 'com.mpaas.android:configservice'
    implementation 'com.mpaas.android:media'
    implementation 'com.mpaas.android:nebula'
    implementation 'com.mpaas.android:push'
    implementation 'com.mpaas.android:tinyapp'
    implementation 'com.mpaas.android:tinyapp-media'
    implementation 'com.mpaas.android:tinyapp-scan'
    implementation 'com.mpaas.android:tinyapp-video'
    implementation 'com.mpaas.android:uccore'
    implementation 'com.mpaas.android:upgrade'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

    //权限申请
    implementation 'com.github.tbruyelle:rxpermissions:0.12'
    implementation 'io.reactivex.rxjava3:rxjava:3.0.4'
    implementation 'io.reactivex.rxjava3:rxandroid:3.0.0'
}

project build.gradle如下：

apply plugin: 'com.alipay.apollo.optimize'// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    ext.mpaas_artifact = "mpaas-baseline"
    ext.mpaas_baseline = "10.1.68-18"
    repositories {
        google()
        jcenter()
        maven {
            url 'http://mvn.cloud.alipay.com/nexus/content/repositories/releases/'
            name 'alipay'
            credentials {
                username 'mvn_read_ws'
                password 'mrk8929'
            }
        }
    }
    dependencies {
        classpath "com.android.tools.build:gradle:4.0.1"
        classpath 'com.android.boost.easyconfig:easyconfig:2.4.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'http://mvn.cloud.alipay.com/nexus/content/repositories/releases/'
            name 'alipay'
            credentials {
                username 'mvn_read_ws'
                password 'mrk8929'
            }
        }
        maven { url 'https://jitpack.io' }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

方法二：针对老项目

1，在 Project 的 build.gradle 中添加如下代码：

  dependencies {
        classpath 'me.tatarka:gradle-retrolambda:3.2.0'
  }

2，在 Module 的 build.gradle 中添加如下代码：

  // 应用插件
  apply plugin: 'me.tatarka.retrolambda'

  // 支持Java8
  android {
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_8
          targetCompatibility JavaVersion.VERSION_1_8
      }
  }