javah 错误：gradle 和 Android Studio 中的包不存在

【问题标题】：javah error: package does not exist with gradle and Android Studiojavah 错误：gradle 和 Android Studio 中的包不存在
【发布时间】：2016-04-23 11:50:59
【问题描述】：

我最近在编译我的 Java 源代码以生成 C++ 头文件时遇到了一个错误：javah 为某些文件吐出package does not exist 错误。

tl;dr: javah 适用于 Java 源代码，但不适用于另一个源 – 哪些 import 子句非常接近； gradle 不处理某些库，但即使处理过的包也会被标记为丢失。

我不知道为什么 javah 开始吐出这个错误，因为它直到最近才运行良好，而且我没有更改任何特别的东西。我将gradle 与Android Studio 的gradle-wrapper 一起使用。我最近将包装器的发行版从 2.2.1 更新到 2.10，但我认为这不是 javah 现在失败的原因。

根据日志和当前文件，javah 在编译 ClassB 而不是 ClassA 时没有从我正在使用的库中找到包。

我们举两个例子：com.batch.android 和 com.adjust.sdk

  • com.batch.android 库 确实 由 gradle 处理，因此它的 jars 在 在我的 build/intermediates/exploded-aar 文件夹中（在 com.batch.android/batch-sdk/1.5.3/jars /classes.jar 和 com.batch.android/batch-sdk/1.5.3/jars/libs/batch.jar)
  • com.adjust.sdk library 不被 gradle 处理，所以它的 jars 不在在我的 build/intermediates/exploded-aar 中
  • 两者都在我的 ~/.gradle/cache/ 文件夹中
  • 两个包都因 javah 丢失而失败
  • 这两个包都不是从ClassA 和ClassB java 文件导入的

感谢您的帮助！

gradle 日志（抱歉，这太长了）：

Executing tasks: [:app:clean, :app:generateDevAmazonDebugSources, :app:generateDevAmazonDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDevAmazonDebugUnitTestDependencies,     :app:assembleDevAmazonDebug]

Configuration on demand is an incubating feature.
:buildSrc:compileJava UP-TO-DATE
:buildSrc:compileGroovy UP-TO-DATE
:buildSrc:processResources UP-TO-DATE
:buildSrc:classes UP-TO-DATE
:buildSrc:jar UP-TO-DATE
:buildSrc:assemble UP-TO-DATE
:buildSrc:compileTestJava UP-TO-DATE
:buildSrc:compileTestGroovy UP-TO-DATE
:buildSrc:processTestResources UP-TO-DATE
:buildSrc:testClasses UP-TO-DATE
:buildSrc:test UP-TO-DATE
:buildSrc:check UP-TO-DATE
:buildSrc:build UP-TO-DATE
Generating assets binaries
Incremental java compilation is an incubating feature.
Cleaning project...
:app:clean
:app:processAssets
:app:copyFiles
:app:preBuild
:app:preDevAmazonDebugBuild
:app:checkDevAmazonDebugManifest
:app:preDevAmazonReleaseBuild
:app:preDevGoogleDebugBuild
:app:preDevGoogleReleaseBuild
:app:preProdAmazonDebugBuild
:app:preProdAmazonReleaseBuild
:app:preProdGoogleDebugBuild
:app:preProdGoogleReleaseBuild
:app:prepareComAndroidSupportAppcompatV72311Library
:app:prepareComAndroidSupportCardviewV72320Library
:app:prepareComAndroidSupportMediarouterV72220Library
:app:prepareComAndroidSupportMultidex100Library
:app:prepareComAndroidSupportRecyclerviewV72311Library
:app:prepareComAndroidSupportSupportV42320Library
:app:prepareComBatchAndroidBatchSdk153Library
:app:prepareComCrashlyticsSdkAndroidAnswers136Library
:app:prepareComCrashlyticsSdkAndroidBeta114Library
:app:prepareComCrashlyticsSdkAndroidCrashlytics255Library
:app:prepareComCrashlyticsSdkAndroidCrashlyticsCore238Library
:app:prepareComCrashlyticsSdkAndroidCrashlyticsNdk112Library
:app:prepareComFacebookAndroidFacebookAndroidSdk4101Library
:app:prepareComGoogleAndroidExoplayerExoplayerR142Library
:app:prepareComGoogleAndroidGmsPlayServices780Library
:app:prepareComGoogleAndroidGmsPlayServicesAds780Library
:app:prepareComGoogleAndroidGmsPlayServicesAnalytics780Library
:app:prepareComGoogleAndroidGmsPlayServicesAppindexing780Library
:app:prepareComGoogleAndroidGmsPlayServicesAppinvite780Library
:app:prepareComGoogleAndroidGmsPlayServicesAppstate780Library
:app:prepareComGoogleAndroidGmsPlayServicesBase780Library
:app:prepareComGoogleAndroidGmsPlayServicesCast780Library
:app:prepareComGoogleAndroidGmsPlayServicesDrive780Library
:app:prepareComGoogleAndroidGmsPlayServicesFitness780Library
:app:prepareComGoogleAndroidGmsPlayServicesGames780Library
:app:prepareComGoogleAndroidGmsPlayServicesGcm780Library
:app:prepareComGoogleAndroidGmsPlayServicesIdentity780Library
:app:prepareComGoogleAndroidGmsPlayServicesLocation780Library
:app:prepareComGoogleAndroidGmsPlayServicesMaps780Library
:app:prepareComGoogleAndroidGmsPlayServicesNearby780Library
:app:prepareComGoogleAndroidGmsPlayServicesPanorama780Library
:app:prepareComGoogleAndroidGmsPlayServicesPlus780Library
:app:prepareComGoogleAndroidGmsPlayServicesSafetynet780Library
:app:prepareComGoogleAndroidGmsPlayServicesVision780Library
:app:prepareComGoogleAndroidGmsPlayServicesWallet780Library
:app:prepareComGoogleAndroidGmsPlayServicesWearable780Library
:app:prepareComMopubMopubSdk440Library
:app:prepareComZendeskBelvedere1011Library
:app:prepareComZendeskSdk1512Library
:app:prepareComZendeskSdkProviders1512Library
:app:prepareIoBranchSdkAndroidLibrary1112Library
:app:prepareIoFabricSdkAndroidFabric1310Library
:app:prepareDevAmazonDebugDependencies
:app:compileDevAmazonDebugAidl
:app:compileDevAmazonDebugRenderscript
:app:generateDevAmazonDebugBuildConfig
:app:generateDevAmazonDebugAssets UP-TO-DATE
:app:mergeDevAmazonDebugAssets
:app:processDevAmazonDebugManifest
:app:fabricGenerateResourcesDevAmazonDebug
:app:generateDevAmazonDebugResValues UP-TO-DATE
:app:processDevAmazonDebugGoogleServices
:app:generateDevAmazonDebugResources
:app:mergeDevAmazonDebugResources
:app:processDevAmazonDebugResources
:app:generateDevAmazonDebugSources
:app:preDevAmazonDebugAndroidTestBuild
:app:prepareDevAmazonDebugAndroidTestDependencies
:app:compileDevAmazonDebugAndroidTestAidl
:app:processDevAmazonDebugAndroidTestManifest
:app:compileDevAmazonDebugAndroidTestRenderscript
:app:generateDevAmazonDebugAndroidTestBuildConfig
:app:generateDevAmazonDebugAndroidTestAssets UP-TO-DATE
:app:mergeDevAmazonDebugAndroidTestAssets
:app:generateDevAmazonDebugAndroidTestResValues UP-TO-DATE
:app:generateDevAmazonDebugAndroidTestResources
:app:mergeDevAmazonDebugAndroidTestResources
:app:processDevAmazonDebugAndroidTestResources
:app:generateDevAmazonDebugAndroidTestSources
:app:mockableAndroidJar UP-TO-DATE
:app:preDevAmazonDebugUnitTestBuild
:app:prepareDevAmazonDebugUnitTestDependencies
:app:javahBuild_ClassA
:app:javahBuild_ClassB
Error: package com.adjust.sdk does not exist
Error: package com.adjust.sdk does not exist
Error: package com.amazon.ags.api does not exist
Error: package com.batch.android does not exist
Error: package com.batch.android does not exist
Error: package com.crashlytics.android does not exist
Error: package com.crashlytics.android.answers does not exist
Error: package com.crashlytics.android.answers does not exist
Error: package com.crashlytics.android.answers does not exist
Error: package com.mopub.common does not exist
Error: package com.zendesk.sdk.feedback.impl does not exist
Error: package com.zendesk.sdk.model.access does not exist
Error: package com.zendesk.sdk.model.access does not exist
Error: package com.zendesk.sdk.model.push does not exist
Error: package com.zendesk.sdk.network.impl does not exist
Error: package com.zendesk.sdk.network.impl does not exist
Error: package com.zendesk.sdk.network.impl does not exist
Error: package com.zendesk.sdk.network.impl does not exist
Error: package com.zendesk.sdk.network.impl does not exist
Error: package com.zendesk.sdk.requests does not exist
Error: package com.zendesk.sdk.storage does not exist
Error: package com.zendesk.sdk.support does not exist
Error: package com.zendesk.service does not exist
Error: package com.zendesk.service does not exist
Error: package org.joda.time does not exist
Error: package org.joda.time does not exist
Error: package org.joda.time does not exist
Error: package org.joda.time does not exist
Error: package org.joda.time.format does not exist
Error: package org.joda.time.format does not exist
Error: package io.branch.indexing does not exist
Error: package io.branch.referral does not exist
Error: package io.branch.referral does not exist
Error: package io.branch.referral does not exist
Error: package io.branch.referral.util does not exist
Error: package io.branch.referral.util does not exist
Error: package com.adjust.sdk does not exist
Error: package com.amazon.ags.api does not exist
Error: package com.amazon.ags.api does not exist
Error: package com.amazon.ags.api does not exist
Error: package com.amazon.ags.api does not exist
Error: package com.applovin.sdk does not exist
Error: package com.batch.android does not exist
Error: package com.crashlytics.android does not exist
Error: package com.crashlytics.android.ndk does not exist
Error: package io.branch.referral does not exist
Error: package io.branch.referral does not exist
Error: package io.fabric.sdk.android does not exist
Error: package com.google.android.gms.analytics does not exist
Error: package com.google.android.gms.analytics does not exist
Error: package com.google.android.gms.analytics does not exist
Error: package com.google.android.gms.ads.identifier does not exist
Error: package com.google.android.gms.common does not exist
Error: package com.mopub.common does not exist
Error: package com.mopub.common does not exist
Error: cannot find symbol
  symbol:   class MoPubErrorCode
  location: package com.mopub.mobileads
Error: cannot find symbol
  symbol:   class MoPubRewardedVideoListener
  location: package com.mopub.mobileads
Error: package com.chartboost.sdk does not exist
Error: package com.adjust.sdk does not exist
Error: package com.adjust.sdk does not exist
Error: package com.adjust.sdk does not exist
Error: package com.adjust.sdk does not exist
Error: cannot find symbol
  symbol:   class BaseZendeskFeedbackConfiguration
  location: class my.super.project.Renderer
Error: cannot find symbol
  symbol:   class BuildConfig
  location: package my.super.project
Error: cannot find symbol
  symbol:   class Tracker
  location: class my.super.project.Main
Error: ';' expected
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook does not exist
Error: package com.facebook.appevents does not exist
Error: package com.facebook.login does not exist
Error: package com.facebook.login does not exist
Error: package com.facebook.share.model does not exist
Error: package com.facebook.share.model does not exist
Error: package com.facebook.share.model does not exist
Error: package com.facebook.share.widget does not exist
Error: package com.facebook.share.widget does not exist
Error: package com.facebook.share.widget does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j does not exist
Error: package twitter4j.auth does not exist
Error: cannot find symbol
  symbol:   class R
  location: package my.super.project
Error: cannot find symbol
  symbol:   class AmazonGamesClient
  location: class my.super.project.Main
Error: cannot find symbol
  symbol:   class MoPubRewardedVideoListener
  location: class my.super.project.Main
Error: cannot find symbol
  symbol:   class ChartBoostDelegate
  location: class my.super.project.Main
Error: cannot find symbol
  symbol:   class CallbackManager
  location: class my.super.project.ClassA
Error: cannot find symbol
  symbol:   class ProfileTracker
  location: class my.super.project.ClassA

 FAILED

FAILURE: Build failed with an exception.

我的build.gradle 有以下任务：

android {
    <snip>
    ['Main', 'Renderer', 'ClassA', 'ClassB'].each {
        def targetName ->
            tasks.create(name: "javahBuild_$targetName", type: Exec) {
                Properties properties = new Properties()
                properties.load(project.rootProject.file('local.properties').newDataInputStream())
                String sdkDir = properties.getProperty('sdk.dir')
                String flavorFolder = getCurrentFlavorFolder()
                commandLine 'javah', '-classpath', "libs/:src/main/java/:$sdkDir/platforms/android-23/android.jar:build/intermediates/classes/$flavorFolder/$config:$sdkDir/platforms/android-23/optional/org.apache.http.legacy.jar/:$config/", '-d', 'src/main/jni/Main/', "my.super.project.${targetName}"
            }
    }

    task javahBuildAll(dependsOn: tasks.matching { Task task -> task.name.startsWith("javahBuild_") })

    tasks.withType(JavaCompile) {
        compileTask -> compileTask.dependsOn javahBuildAll
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')

    compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') {
        transitive = true;
    }
    compile('com.crashlytics.sdk.android:crashlytics-ndk:1.1.2@aar') {
        transitive = true
    }
    compile('com.mopub:mopub-sdk:4.4.0@aar') {
        transitive = true
    }

    compile group: 'com.zendesk', name: 'sdk', version: '1.5.1.2'

    compile('com.android.support:multidex:1.0.0')
    compile('com.google.android.gms:play-services:7.8.0')
    compile('com.google.android.gms:play-services-analytics:7.8.0')
    compile('com.google.android.gms:play-services-gcm:7.8.0')
    compile('com.android.support:appcompat-v7:23.1.0')
    compile('com.android.support:support-v4:23.1.0')
    compile('com.facebook.android:facebook-android-sdk:4.10.+')
    compile('io.branch.sdk.android:library:1.+')
    compile('com.batch.android:batch-sdk:1.5+')
    compile('com.adjust.sdk:adjust-android:4.2.3')
    compile('joda-time:joda-time:2.9.2')
}

【问题讨论】：

  • 我认为您的输出不应被解释为“javah 适用于 Java 源，但不适用于其他源”。可见的结果似乎是在两个目标上并行运行 javah 的结果。如果您手动运行这些任务，您可以验证或拒绝我的评估。
  • 嗨，亚历克斯，感谢您的回复。这是我首先想到的，但从命令行运行 javah 会得到相同的结果：它适用于 ClassA，但不适用于 ClassB。
  • 据我所知，javah 并不关心导入，并且只会在无法确定您要求它处理的类的本机方法的签名时才会抱怨，然后是消息在日志中是“错误：无法确定...的签名”。尝试设置-classpath src/main/java，你会自己看到的。
  • 我确实指定了类路径，但它没有任何帮助，ClassA 和 ClassB 的处理方式完全相同......
  • 我确信 javah 不会抱怨不存在的包。您可以将 ClassB 复制到整个项目之外，javah 将对其进行处理：mkdir -p /tmp/my/super/project &amp;&amp; cp src/main/java/my/super/project/ClassB.java /tmp/my/super/project &amp;&amp; javah -cp /tmp my.super.project.ClassB

标签： android-studio gradle android-ndk javah


【解决方案1】：

好吧，它不明白我为什么会收到这些错误，但我意识到我可以忽略它们，因为 C++ 头文件仍在生成中。

所以我决定修改我的javah gradle 任务以忽略错误并将其写入专用日志文件。我添加了以下行：

errorOutput = project.file("build/javah_error_${targetName}.log").newDataOutputStream()
ignoreExitValue = true

我的javah 任务现在看起来像这样：

['Main', 'Renderer', 'ClassA', 'ClassB'].each {
    def targetName ->
        tasks.create(name: "javahBuild_$targetName", type: Exec) {
            Properties properties = new Properties()
            properties.load(project.rootProject.file('local.properties').newDataInputStream())
            String sdkDir = properties.getProperty('sdk.dir')
            String flavorFolder = getCurrentFlavorFolder()
            errorOutput = project.file("build/javah_error_${targetName}.log").newDataOutputStream()
            ignoreExitValue = true
            commandLine 'javah', '-classpath', "libs/:src/main/java/:$sdkDir/platforms/android-23/android.jar:build/intermediates/classes/$flavorFolder/$config:$sdkDir/platforms/android-23/optional/org.apache.http.legacy.jar/:$config/", '-d', 'src/main/jni/Main/', "my.super.project.${targetName}"
        }
}

【讨论】：

    【解决方案2】：

    经过几个小时的搜索、研究、反复试验和其他事情，我终于搞定了。

    javah 不见了，现在必须使用javac […] -h &lt;destdir&gt; […]。

    我的顶级build.gradle（不是app/ 下的那个！）到add javac arguments 中已经有以下sn-p...

    tasks.withType(JavaCompile) {
    options.compilerArgs << "-Xlint:all"
}

    ……而“just”必须扩展它。 （本部分进入您已经在顶级build.gradle 中拥有的allprojects { 块，我将它放在repositories { […] } 块之后。）

    在我的例子中，我只是想让 .h 文件被创建，而不是在 C 代码中主动 #include 它们（因为我使用 the RegisterNatives method 来注册我的函数），这将是......棘手，因为除了，人们还必须：

    • 找出哪些（可能是多个）任务应该创建在实际构建中使用的.h 文件
    • 给那个一个稳定的路径名​​
    • 将 that 路径添加到本机构建中的包含目录（同样棘手）

    对于单纯的手动内省，我只是将javac -h &lt;destdir&gt; 选项添加到所有 javac 调用，创建每个任务的结果目录，然后在 Midnight Commander 中查看它们：

    tasks.withType(JavaCompile) {
    options.compilerArgs << "-Xlint:all"
    options.getHeaderOutputDirectory().value(project.layout.buildDirectory.dir("headers/" + getName()))
}

    （compilerArgs 的更改当然是从上面原样复制的。）

    【讨论】：

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