Process cannot access the file because it is being used by another process [Android] [Gradle]

Question

Whenever trying to run a flutter app I am greeted with this error.

* What went wrong: Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'. java.nio.file.FileSystemException: D:\Projects\buisnesscard\build\app\intermediates\transforms\mergeJavaRes\debug\0.jar: The process cannot access the file because it is being used by another process.

I tried adding:

packagingOptions { exclude 'META-INF/DEPENDENCIES.txt' exclude 'META-INF/NOTICE' exclude 'META-INF/NOTICE.txt' exclude 'META-INF/LICENSE' exclude 'META-INF/LICENSE.txt' }

to my build gradle file and restarting android studio however the error still occurs.

My /app/build.gradle looks like this:

`

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 28

    lintOptions {
        disable 'InvalidPackage'
    }

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.seandiacono.buisnesscard"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    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:17.0.0'
}

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

`

Solution 1

What works for me is to close Android Studio, go to my workspace in the File Explorer and delete {project}/app/build. Then reopen Android Studio.

Solution 2

I added

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/ASL2.0'
        exclude 'META-INF/*'
        exclude("META-INF/*.kotlin_module")
    }

in the android portion of my app/build.gradle file, and then I went into FileExplorer [myproject]/app and deleted the entire directory titled "build"

Comments

[Sam]

I tried flutter clean but I got error 'flutter' is not recognized as an internal or external command, operable program or batch file.

[Doug]

Ran across something similar in Expo, also worked here.