未知错误：java.lang.IllegalArgumentException:！directory.isDirectory（）目录

我只是试图重建我的项目没有改变什么，我得到了一个未知的错误，我似乎无法解决

我试图清理项目，重建项目，以及重新启动Android Studio，但没有任何效果。该错误还指出，某些功能已被弃用，但这并没有阻止应用程序在10分钟前完美运行

返回的错误：

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:packageDebug'.
> 1 exception was raised by workers:
  java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: !directory.isDirectory()


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/5.1.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 7s
31 actionable tasks: 28 executed, 3 up-to-date

使用堆栈跟踪：

0:15:15.045 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
00:15:15.045 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
00:15:15.045 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
00:15:15.046 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
00:15:15.046 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task ':app:packageDebug'.
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > 1 exception was raised by workers:
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   java.lang.IllegalArgumentException: !directory.isDirectory()
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Try:
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.  Run with --scan to get full insights.
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
00:15:15.047 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Get more help at https://help.gradle.org

应用程序级渐变文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.camerakitqr"
        minSdkVersion 23
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:design:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'



    //androidTestImplementation 'com.android.support.test:runner:1.0.2'
    //androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.firebase:firebase-core:16.0.9'
    implementation 'com.google.firebase:firebase-ml-vision:20.0.0'
    implementation 'com.android.volley:volley:1.1.1'
    implementation 'com.karumi:dexter:5.0.0'
    implementation 'com.android.support:design:28.0.0'


}
apply plugin: 'com.google.gms.google-services'

---

将此添加到您的

应用程序级别的Gradle

文件中

compileOptions {
  sourceCompatibility JavaVersion.VERSION_1_8
  targetCompatibility JavaVersion.VERSION_1_8
}

---

显示你的应用程序级别的渐变文件我现在编辑了谢谢这项工作谢谢！你能确切地告诉我它做了什么以供将来参考吗？Android Studio默认情况下预先打包了一小部分

Java 8

语言功能，为了支持其余功能，我们使用此代码。