使用 log4j 更新 Android Studio 后 gradle 构建出错

Question

我在更新 Android Studio 和 SDK 后确实遇到了这些错误：

Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.ControlPanel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.Main) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.chainsaw.MyTableModel) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.util.LogFileParser) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LF5SwingUtils) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.apache.log4j.lf5.viewer.LogBrokerMonitor) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a

已安装的 SDK：

全部包括转。 25.1.2

Android工作室：

Android Studio 2.0 构建 #AI-143.2739321，构建于 2016 年 4 月 5 日 JRE: 1.7.0_80-b15 amd64

项目的build.gradle文件：

apply plugin: 'com.android.application'

android {

signingConfigs {
    mulco {
        storeFile file("somePath")
        storePassword "..."
        keyAlias "..."
        keyPassword "..."
    }
}

compileSdkVersion 22
buildToolsVersion "22.0.1"

def versionPropertiesFile = file('version.properties')
if (versionPropertiesFile.canRead()) {
    def Properties versionProps = new Properties()
    versionProps.load(new FileInputStream(versionPropertiesFile))
    def code = versionProps['VERSION_CODE'].toInteger() + 1
    versionProps['VERSION_CODE'] = code.toString()
    println('count version up ' + code.toString())
    versionProps.store(versionPropertiesFile.newWriter(), null)

    defaultConfig {
        multiDexEnabled true
        signingConfig signingConfigs.mulco
        applicationId "com.test.mulcoandroid"
        minSdkVersion 19
        targetSdkVersion 22
        versionCode code
        versionName "1.03.01"
    }
} else {
    throw new GradleException("Could not read version.properties!")
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        signingConfig signingConfigs.mulco
    }
    debug {
        debuggable true
        signingConfig signingConfigs.mulco
    }
}
packagingOptions {
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.android.gms:play-services-maps:8.4.0'
    compile project(':iCommonLibrary')
    compile project(':mulcobluetooth')
    compile project(':iScannerLibrary')
    compile project(':iPictureLibrary')
    compile 'com.android.support:multidex:1.0.1'
    testCompile "junit:junit:4.12"
    compile 'net.lingala.zip4j:zip4j:1.3.2'
}

和依赖的 iCommonLibrary：

apply plugin: 'com.android.library'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    multiDexEnabled true
    minSdkVersion 16
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

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

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.squareup.okhttp:okhttp:2.5.0'
    compile 'de.greenrobot:greendao:1.3.7'
    compile 'commons-io:commons-io:2.4'
    compile 'org.apache.commons:commons-lang3:3.3.2'
    compile 'commons-codec:commons-codec:1.10'
    compile 'de.mindpipe.android:android-logging-log4j:1.0.3'
    compile 'org.slf4j:slf4j-api:1.6.4'
    compile 'org.slf4j:slf4j-log4j12:1.6.4'
    compile 'com.google.android.gms:play-services-location:8.4.0'
    compile 'commons-net:commons-net:3.3'
    compile 'com.jjoe64:graphview:4.0.1'
    compile 'com.android.support:support-annotations:22.0.1'
}

iPictureLibrary

build.gradle:

apply plugin: 'com.android.library'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    minSdkVersion 19
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'it.sephiroth.android.library.horizontallistview:hlistview:1.2.2'
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.jakewharton:disklrucache:2.0.2'
    compile project(':iCommonLibrary')
}

build.gradle 的 iScannerLibrary:

apply plugin: 'com.android.library'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    minSdkVersion 16
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.zxing:core:3.2.1'
    compile 'com.google.zxing:android-core:3.2.1'
    compile files('libs/GrabbaSDK/Grabba driver for android v1.122.jar')
    compile project(':iCommonLibrary')
}

build.gradle mulcobluetooth 文件:

apply plugin: 'com.android.library'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    minSdkVersion 16
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

defaultConfig
{
    multiDexEnabled true
}
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'org.apache.commons:commons-lang3:3.3.2'
    compile 'commons-io:commons-io:2.4'
}

我希望我提供了任何重要信息

如果有人知道什么...请帮助我！我在 "NEULAND"

中找不到任何内容

抱歉问了这么长的问题...感谢所有已经完成的人。

编辑：

我将依赖项更新为：

compile 'org.apache.logging.log4j:log4j-core:2.5'
compile 'org.slf4j:slf4j-api:1.7.21'
compile 'org.slf4j:slf4j-log4j12:1.7.21'

但一切都没有改变。我仍然有大约 500 个构建错误....我删除了 mindpipe 作为参考并自己编码...什么都没发生！

编辑：

开工单：问题206867

https://code.google.com/p/android/issues/detail?id=206867

编辑：

卸载 Android Studio 2.0 并再次安装 1.5.1 后，我收到以下警告：

警告：Gradle需要 2.10 版。当前版本是 2.8。如果使用 gradle 包装器，请尝试将 C:\Sources\iRecyApps\iRecyMulco-1.0.1iOS\gradle\wrapper\gradle-wrapper.properties 中的 distributionUrl 编辑为 gradle-2.10-all.zip

因此 gradle 版本更新了 2...

我告诉自己当前的 gradle 版本是 2.12

我都下载了并尝试了这个：

您需要更改文件 > 设置 > 构建、执行、部署 > 构建工具 > Gradle >Gradle 主路径

在 Mac OS 上，在 Android Studio > 首选项 > 构建、执行、部署 > 构建工具 > Gradle >Gradle 中更改路径家

或设置使用默认 gradle 包装器并像这样编辑 Project\gradle\wrapper\gradle-wrapper.properties 文件字段 distributionUrl

根据：

http://tools.android.com/tech-docs/new-build-system/version-compatibility

仍然没有

Answer 1

通过在 Gradle 配置中将所有 com.android.support 依赖项降级到 23.1.1 解决。

Answer 2

我也遇到了同样的错误。这让我发疯，因为错误计数 > 1K。我在启用混淆器的发布版本中遇到了这些错误。

经过一些挖掘，我发现在你的 proguard-rules.pro 文件中添加 -keepattributes EnclosingMethod 所有这些错误都会消失。

来源：Thread and Issue #294 GitHub。

Answer 3

将此行添加到 proguard-rules.pro

-keepattributes EnclosingMethod

这个错误可能会发生几乎所有类有 InnerClasses，我想。（比如 support.v4 等）对我来说。

我测试过 Android 工作室 2.2
（未测试 log4j。已测试 support.v4 等）

build.gradle

compileSdkVersion 24
buildToolsVersion "24.0.2"
...
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
...
dependencies {
    ...
    compile 'com.android.support:support-v4:24.2.1'
}

getDefaultProguardFile('proguard-android-optimize.txt') 也有效。

Answer 4

在我的例子中，我在启用 Instant Run 时遇到了这个错误，但是在禁用 Instant Run 之后错误就消失了。

Answer 5

在您的项目中的 proguard-rules.pro 中编写此代码段。

-keepattributes EnclosingMethod

通过将上面的代码片段写入 proguard-rules.pro 文件，proguard 规则实际上改变了类的混淆方式。

Answer 6

这对我有用，开始一个新的 Android 工作室项目将 gradle-wrapper.properties 和 build.gradle（项目："Project Name"）复制并粘贴到出现错误的旧项目中 - 以升级您的 gradle

同时将此添加到您的混淆器中-rules.pro

-keepattributes EnclosingMethod

按如下方式更新您的 build.gradle（模块：应用程序）

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

    }

    dexOptions {
        preDexLibraries = false
    }

使用 log4j 更新 Android Studio 后 gradle 构建出错

Error in gradle build after updating Android Studio with log4j

dependencies

android

build

android-studio

build.gradle