在 Android 上使用 Smack 4.1 时的初始化异常“NoClassDefFoundError: javax.naming.directory.InitialDirContext”

【问题标题】：Initialization exception "NoClassDefFoundError: javax.naming.directory.InitialDirContext" when using Smack 4.1 on Android在 Android 上使用 Smack 4.1 时的初始化异常“NoClassDefFoundError: javax.naming.directory.InitialDirContext”
【发布时间】：2015-05-19 09:43:08
【问题描述】：

我正在尝试将 Smack 用于我的项目。我以前在我早期的一些项目中使用过 aSmack，效果非常好。但是 Smack 给了我一些奇怪的例外情况。

这是我的初始化代码 - 

public void init(String username, String password) throws IOException, XMPPException, SmackException {
        mConnection = new XMPPTCPConnection(username, password, HOST_NAME); //This is the line which generates the exception

        mConnection.connect();
        mConnection.login();

        mChatManager = ChatManager.getInstanceFor(mConnection);
        mChatManager.addChatListener(this);
    }

这是 Logcat 的输出 - 

java.lang.IllegalStateException: Could not execute method of the activity
            at android.view.View$1.onClick(View.java:3690)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at android.view.View$1.onClick(View.java:3685)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ExceptionInInitializerError
            at test.Managers.XMPPManager.init(XMPPManager.java:42)
            at test.LoginActivity.onLoginClick(LoginActivity.java:46)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at android.view.View$1.onClick(View.java:3685)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ExceptionInInitializerError
            at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
            at org.jivesoftware.smack.AbstractXMPPConnection.<clinit>(AbstractXMPPConnection.java:98)
            at test.Managers.XMPPManager.init(XMPPManager.java:42)
            at test.LoginActivity.onLoginClick(LoginActivity.java:46)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at android.view.View$1.onClick(View.java:3685)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ExceptionInInitializerError
            at java.lang.Class.classForName(Native Method)
            at java.lang.Class.forName(Class.java:217)
            at org.jivesoftware.smack.SmackInitialization.loadSmackClass(SmackInitialization.java:213)
            at org.jivesoftware.smack.SmackInitialization.parseClassesToLoad(SmackInitialization.java:193)
            at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:163)
            at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:148)
            at org.jivesoftware.smack.SmackInitialization.<clinit>(SmackInitialization.java:116)
            at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
            at org.jivesoftware.smack.AbstractXMPPConnection.<clinit>(AbstractXMPPConnection.java:98)
            at test.Managers.XMPPManager.init(XMPPManager.java:42)
            at test.LoginActivity.onLoginClick(LoginActivity.java:46)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at android.view.View$1.onClick(View.java:3685)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoClassDefFoundError: javax.naming.directory.InitialDirContext
            at org.jivesoftware.smack.util.dns.javax.JavaxResolver.<clinit>(JavaxResolver.java:50)
            at java.lang.Class.classForName(Native Method)
            at java.lang.Class.forName(Class.java:217)
            at org.jivesoftware.smack.SmackInitialization.loadSmackClass(SmackInitialization.java:213)
            at org.jivesoftware.smack.SmackInitialization.parseClassesToLoad(SmackInitialization.java:193)
            at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:163)
            at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:148)
            at org.jivesoftware.smack.SmackInitialization.<clinit>(SmackInitialization.java:116)
            at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
            at org.jivesoftware.smack.AbstractXMPPConnection.<clinit>(AbstractXMPPConnection.java:98)
            at test.Managers.XMPPManager.init(XMPPManager.java:42)
            at test.LoginActivity.onLoginClick(LoginActivity.java:46)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at android.view.View$1.onClick(View.java:3685)
            at android.view.View.performClick(View.java:4192)
            at android.view.View$PerformClick.run(View.java:17248)
            at android.os.Handler.handleCallback(Handler.java:615)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4950)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
            at dalvik.system.NativeStart.main(Native Method)

我检查了一些论坛帖子，上面说这个问题是在启用 proguard 时出现的。但是在我的项目中，Progaurd 被禁用。

知道什么会导致这个异常吗？

更新：-
这就是我的 app.gradle 文件的样子 - 

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'org.igniterealtime.smack:smack-java7:4.1.0'
    // Optional for XMPPTCPConnection
    compile 'org.igniterealtime.smack:smack-tcp:4.1.0'
    // Optional for XMPP-IM (RFC 6121) support (Roster, Threaded Chats, …)
    compile 'org.igniterealtime.smack:smack-im:4.1.0'
    // Optional for XMPP extensions support
    compile 'org.igniterealtime.smack:smack-extensions:4.1.0'
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile project(':xxx')
    compile project(':xxx')
    compile project(':xxx')
    compile('com.crashlytics.sdk.android:crashlytics:2.2.4@aar') {
        transitive = true;
    }
}

【问题讨论】：

  • 你读过 Smack 的自述文件吗？您是如何将 Smack 添加到您的项目中的？
  • @Flow 感谢您的回复。我使用 Gradle 添加依赖项。请检查问题中的更新部分以查看我添加的内容。
  • 我阅读了文档部分。代码取自入门部分。

标签： android exception xmpp smack


【解决方案1】：

不要在 Android 项目上添加 smack-java7，而是使用 smack-android。

Smack 4.2.0 也是最新的 Smack 版本。

【讨论】：

  • 现在我觉得忽略这个细节很愚蠢。谢谢您的帮助。它确实有效。
猜你喜欢
  • 2015-07-26
  • 1970-01-01
  • 2015-01-13
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 1970-01-01
  • 2023-03-31
  • 1970-01-01
相关资源
最近更新 更多
热门标签
Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode