文章目录

一、报错信息

更新了 Android Studio 到 4.2.14.2.14.2.1 , 打开之前的老项目 , 部分界面是由 Kotlin 开发的 , 进入 Kotlin 开发的界面报错 , 进入 Java 开发的界面正常 ;

此外 , Kotlin 升级到了 1.5.01.5.01.5.0 ;

Android Studio 4.2.14.2.14.2.1 编译报错 , 凡是调用到 Kotlin 的 Activity 界面 , 都爆如下异常 ;

Java 代码的 Activity 正常运行 ;

-06-02 15:10:31.521 32223-32223/com.example.demo E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.example.demo, PID: 32223java.lang.BootstrapMethodError: Exception from call site #491 bootstrap methodat com.example.demo.DemoActivity.initViews(DemoActivity.kt:758)at com.example.demo.DemoActivity.onCreate(DemoActivity.kt:378)at android.app.Activity.performCreate(Activity.java:7144)at android.app.Activity.performCreate(Activity.java:7135)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931)at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086)at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)at android.os.Handler.dispatchMessage(Handler.java:106)at android.os.Looper.loop(Looper.java:193)at android.app.ActivityThread.main(ActivityThread.java:6718)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)Caused by: java.lang.ClassCastException: Bootstrap method returned nullat com.example.demo.DemoActivity.initViews(DemoActivity.kt:758) at com.example.demo.DemoActivity.onCreate(DemoActivity.kt:378) at android.app.Activity.performCreate(Activity.java:7144) at android.app.Activity.performCreate(Activity.java:7135) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2931) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3086) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6718) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

二、解决方案

创建一个最新的应用 , 查看具体的配置与 老项目的 配置区别 :

plugins {id 'com.android.application'id 'kotlin-android'}android {compileSdkVersion 30buildToolsVersion "30.0.3"defaultConfig {applicationId "com.example.myapplication"minSdkVersion 16targetSdkVersion 30versionCode 1versionName "1.0"testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'}}compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}kotlinOptions {jvmTarget = '1.8'}}dependencies {implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"implementation 'com.android.support:appcompat-v7:28.0.0'implementation 'com.android.support.constraint:constraint-layout:2.0.4'testImplementation 'junit:junit:4.+'androidTestImplementation 'com.android.support.test:runner:1.0.2'androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'}

发现在 Module 下的 build.gradle 构建脚本中 , " android " 层级下 , 配置如下选项 ;

compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}kotlinOptions {jvmTarget = '1.8'}

将上述配置配置到 老项目 的 " android " 层级下 , 编译通过 ;

【错误记录】Android Studio 4.2.1 编译报错 ( 设置支持的 Java 和 Kotlin 版本 | java.lang.BootstrapMethodError )