javah error: package does not exist with gradle and Android Studio

Question

我最近在编译我的 Java 源以生成 C++ headers 时遇到错误：javah 为某些文件吐出 package does not exist 错误。

tl;dr: javah 适用于 Java 来源但不适用于另一个来源 - 导入子句非常接近； gradle 不处理某些库，但即使是处理过的库的包也会被标记为丢失。

我不知道为什么 javah 开始吐出那个错误，因为直到最近它运行良好而且我没有做任何特别的更改。我正在使用 gradle 和 Android Studio 的 gradle-wrapper。我最近将包装器的分发版从 2.2.1 更新到 2.10，但我认为这不是 javah 现在失败的原因。

根据日志和现有文件，javah 在编译时没有从我正在使用的库中找到包 ClassB 但没有 ClassA。

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

com.batch.android 库确实被 gradle 处理，所以它的罐子是在我的 build/intermediates/exploded-aar 文件夹（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 下）
com.adjust.sdk 库不会被 gradle 处理，所以它的罐子不在我的 build/intermediates/exploded-aar
都在我的 ~/.gradle/cache/ 文件夹中
两个包都因 javah
这两个包都不是从 ClassA 和 ClassB java 文件中导入的

感谢您的帮助！

gradle 日志（对不起各位，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')
}

Answer 1

好吧，它不明白为什么我会收到这些错误，但我刚刚意识到我可以忽略它们，因为 C++ 头文件仍在生成。

所以我决定修改我的 javah gradle 任务以忽略错误并将它们写入专用日志文件。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}"
        }
}

Answer 2

经过多个小时的搜索、研究、反复试验和其他事情，我终于明白了。

javah没了，现在必须用javac […] -h <destdir> […]。

我的顶级 build.gradle（不是 app/ 左右的那个！）到 …

中已经有以下代码片段

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

… 并且“只是”必须扩展它。（此部分进入您在顶层 build.gradle 中已有的 allprojects { 块，我将其放在 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……棘手的，因为此外还必须：

找出 （可能是多个）任务中的哪个 应该创建实际构建中使用的 .h 文件
给那个一个稳定的路径名
添加 that 路径到本机构建中的包含目录（再次棘手）

对于纯粹的手动自省，我只是将 javac -h <destdir> 选项添加到 all javac 调用，创建每个任务的结果目录，然后看看午夜指挥官中的他们：

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

（当然，compilerArgs 的变化是从上面原封不动地复制过来的。）

javah error: package does not exist with gradle and Android Studio

javah error: package does not exist with gradle and Android Studio

android-studio

gradle

android-ndk

javah