java - Android Apache Logger 在生产(发布版本)中无故崩溃

Question

使用下面的 build.gradle 构建变体创建版本时，我在启动应用程序时不断遇到应用程序崩溃的情况。它与记录器有关，但我似乎无法找出为什么在启用 Proguard/minify 的情况下会发生这种情况，而在没有启用它的情况下它也能很好地工作。我希望我的代码尽可能紧凑和困惑，因此禁用 Proguard 不是一个选择。我添加了诸如“keep org.apache”之类的语句，但它不起作用。我该如何解决这个问题？我似乎无法在任何地方找到任何答案，我能找到的大多数答案都是关于“smack”之类的内容，他们建议保留 org.apache 类，但这并没有解决问题。

编辑:

还有来自 R8 的警告，其中包含以下消息:The method void org.apache.commons.logging.impl.Log4JLogger.<clinit>() does not type check and will be assumed to be unreachable.

构建.gradle

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

Proguard-rules.pro

-keep class io.ktor.** { *; }
-dontwarn org.slf4j.**
-keep class org.apache.** { *; }
-keep class org.apache.commons.logging.** { *; }
-keep class kotlin.reflect.jvm.internal.** {*;}
-keep class kotlin.text.RegexOption {*;}

-keep class org.apache.log.** { *; }
-dontwarn org.apache.log.**
-keep class org.apache.log4j.** { *; }
-dontwarn org.apache.log4j.**
-keep class org.apache.avalon.** { *; }
-dontwarn org.apache.avalon.**
-keep class javax.servlet.** { *; }
-dontwarn javax.servlet.**

崩溃

--------- beginning of crash
2020-02-01 12:13:42.928 23076-23152/? E/AndroidRuntime: FATAL EXCEPTION: DefaultDispatcher-worker-2
    Process: com.my.app, PID: 23076
    java.lang.ExceptionInInitializerError
        at b84.resumeWith(Unknown Source:11)
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80)
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(Unknown Source:83)
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Unknown Source:29)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Unknown Source:86)
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:0)
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Unknown Source:6)
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:0)
        at b84.resumeWith(Unknown Source:11)
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(Unknown Source:5)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(Unknown Source:14)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(Unknown Source:28)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(Unknown Source:0)
     Caused by: org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference (Caused by java.lang.NullPointerException: Attempt to invoke virtual 
method 'java.lang.String java.lang.String.trim()' on a null object reference)
        at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(Unknown Source:43)
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(Unknown Source:10)
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(Unknown Source:4)
        at org.apache.commons.logging.LogFactory.getLog(Unknown Source:4)
        at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>(Unknown Source:5)
        at org.apache.http.impl.nio.client.HttpAsyncClientBuilder.build(Unknown Source:79)
        at io.ktor.client.engine.apache.ApacheEngine.prepareClient(Unknown Source:76)
        at io.ktor.client.engine.apache.ApacheEngine.<init>(Unknown Source:23)
        at io.ktor.client.engine.apache.Apache.create(Unknown Source:15)
        at io.ktor.client.HttpClientKt.HttpClient(Unknown Source:22)
        at io.ktor.client.HttpClientJvmKt.HttpClient(Unknown Source:7)
        at io.ktor.client.HttpClientJvmKt.HttpClient$default(Unknown Source:6)
        at b84.resumeWith(Unknown Source:11) 
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80) 
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(Unknown Source:83) 
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Unknown Source:29) 
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Unknown Source:86) 
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:0) 
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Unknown Source:6) 
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:0) 
        at b84.resumeWith(Unknown Source:11) 
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(Unknown Source:5) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(Unknown Source:14) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(Unknown Source:28) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(Unknown Source:0) 
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference
        at org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(Unknown Source:400)
        at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(Unknown Source:126)
        at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(Unknown Source:6)
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(Unknown Source:10) 
        at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(Unknown Source:4) 
        at org.apache.commons.logging.LogFactory.getLog(Unknown Source:4) 
        at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>(Unknown Source:5) 
        at org.apache.http.impl.nio.client.HttpAsyncClientBuilder.build(Unknown Source:79) 
        at io.ktor.client.engine.apache.ApacheEngine.prepareClient(Unknown Source:76) 
        at io.ktor.client.engine.apache.ApacheEngine.<init>(Unknown Source:23) 
        at io.ktor.client.engine.apache.Apache.create(Unknown Source:15) 
        at io.ktor.client.HttpClientKt.HttpClient(Unknown Source:22) 
        at io.ktor.client.HttpClientJvmKt.HttpClient(Unknown Source:7) 
        at io.ktor.client.HttpClientJvmKt.HttpClient$default(Unknown Source:6) 
        at b84.resumeWith(Unknown Source:11) 
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80) 
        at kotlinx.coroutines.EventLoopImplBase.processNextEvent(Unknown Source:83) 
        at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Unknown Source:29) 
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Unknown Source:86) 
        at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:0) 
        at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Unknown Source:6) 
        at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:0) 
        at b84.resumeWith(Unknown Source:11) 
        at kotlinx.coroutines.DispatchedTask.run(Unknown Source:80) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(Unknown Source:5) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(Unknown Source:14) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(Unknown Source:28) 
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(Unknown Source:0) 

Answer 1

我也遇到了类似的异常，并花了几天的时间来解决它，直到我在https://github.com/nextcloud/android-library/issues/411中找到了讨论.

简而言之，如果您需要解决方法，我认为您可以尝试添加

<application
    ...>

    <uses-library
        android:name="org.apache.http.legacy"
        android:required="false" />

</application>

在 AndroidManifest.xml 中。