gradle sync失败导致:java.lang.NullPointerException

Question

今天我盯着我的Android Studio并弹出这个错误,昨天一切都很好......真的不知道出了什么问题,所以我尝试重新安装Android工作室,安装Android SDK构建工具,android SDK工具25.2.2也

救命

来自模块应用程序

apply plugin: 'com.android.application'


android {
    compileSdkVersion 23
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "oo"
        minSdkVersion 17
        targetSdkVersion 23
        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(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:design:23.0.1'
}

来自项目

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'

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

allprojects {
    repositories {
        jcenter()
    }
}

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

启动android studio后的EVENT LOG

> Error:Cause: java.lang.NullPointerException   at
> java.util.Objects.requireNonNull(Objects.java:203)    at
> java.util.Arrays$ArrayList.<init>(Arrays.java:3813)   at
> java.util.Arrays.asList(Arrays.java:3800)     at
> com.intellij.openapi.util.io.FileUtilRt.doCreateTempFile(FileUtilRt.java:399)
>   at
> com.intellij.openapi.util.io.FileUtilRt.createTempFile(FileUtilRt.java:361)
>   at
> com.intellij.openapi.util.io.FileUtilRt.createTempFile(FileUtilRt.java:341)
>   at
> com.intellij.openapi.util.io.FileUtilRt.createTempFile(FileUtilRt.java:334)
>   at
> com.intellij.openapi.util.io.FileUtil.createTempFile(FileUtil.java:1479)
>   at
> com.android.tools.idea.gradle.util.GradleUtil.addInitScriptCommandLineOption(GradleUtil.java:1064)
>   at
> com.android.tools.idea.gradle.util.GradleUtil.addLocalMavenRepoInitScriptCommandLineOption(GradleUtil.java:1057)
>   at
> com.android.tools.idea.gradle.util.GradleUtil.addLocalMavenRepoInitScriptCommandLineOption(GradleUtil.java:1023)
>   at
> com.android.tools.idea.gradle.project.AndroidGradleProjectResolver.getExtraCommandLineArgs(AndroidGradleProjectResolver.java:345)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.doResolveProjectInfo(GradleProjectResolver.java:175)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.access$300(GradleProjectResolver.java:73)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:768)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver$ProjectConnectionDataNodeFunction.fun(GradleProjectResolver.java:752)
>   at
> org.jetbrains.plugins.gradle.service.execution.GradleExecutionHelper.execute(GradleExecutionHelper.java:238)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:112)
>   at
> org.jetbrains.plugins.gradle.service.project.GradleProjectResolver.resolveProjectInfo(GradleProjectResolver.java:73)
>   at
> com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl$1.produce(RemoteExternalSystemProjectResolverImpl.java:41)
>   at
> com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl$1.produce(RemoteExternalSystemProjectResolverImpl.java:37)
>   at
> com.intellij.openapi.externalSystem.service.remote.AbstractRemoteExternalSystemService.execute(AbstractRemoteExternalSystemService.java:59)
>   at
> com.intellij.openapi.externalSystem.service.remote.RemoteExternalSystemProjectResolverImpl.resolveProjectInfo(RemoteExternalSystemProjectResolverImpl.java:37)
>   at
> com.intellij.openapi.externalSystem.service.remote.wrapper.ExternalSystemProjectResolverWrapper.resolveProjectInfo(ExternalSystemProjectResolverWrapper.java:49)
>   at
> com.intellij.openapi.externalSystem.service.internal.ExternalSystemResolveProjectTask.doExecute(ExternalSystemResolveProjectTask.java:51)
>   at
> com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:138)
>   at
> com.intellij.openapi.externalSystem.service.internal.AbstractExternalSystemTask.execute(AbstractExternalSystemTask.java:124)
>   at
> com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:419)
>   at
> com.intellij.openapi.externalSystem.util.ExternalSystemUtil$4$2.run(ExternalSystemUtil.java:500)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:563)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:142)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:446)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:392)
>   at
> com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
>   at
> com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:127)
>   at
> com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:126)
>   at
> com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:369)
>   at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>   at java.util.concurrent.FutureTask.run(FutureTask.java:266)     at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>   at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>   at java.lang.Thread.run(Thread.java:745)

Answer 1

以下步骤帮助我摆脱了这种情况:

• 文件 - >使高速缓存/重新启动无效 - >无效并重新启动
• 建立 - >清洁项目

希望有所帮助!

Answer 2

我在编辑Flutter项目的项目结构时遇到了这个问题。在此之前我的项目运行良好。 所以可能是由于一些配置错误造成的。 我解决了这样做：

• 关闭AndroidStudio
• 转到文件系统your/project/path并删除该文件夹.idea
• 使用 android studio 再次打开您的项目

在这样做之前我尝试过File > Invalidate Cache / Restart ..，但可能没用。

Answer 3

因此，经过多次尝试让 Android Studio 2.2.2 正常工作，下面描述了更少痛苦且最佳的解决方案:)，因此对于任何在这个新版本的 Android studio ( 2.2.2 )上遇到问题的人...不起作用，即使是裸安装也无法成功完成我建议全新安装旧版本- 在我的情况下为2.1.1

全新安装：

1打开控制面板 --> 卸载 Android Studio --> 选择 SDK 和用户设置

2转到：C:/Program Files/Android --> 删除

3转到：C:/Users/UserName/ 并删除 .android、.AndroidStudio2.2、.gradle 和（如果有）m2 文件夹

4.下载2.1.1版本，可以使用这个链接： http: //tools.android.com/download/studio/builds/2-1-1

5下载解压文件后，转到文件夹 android-studio/bin --> 双击 studio.exe（32 位）或 studio64.exe（64 位），打开安装程序

6终于开始写代码了^^