在 Android 的 SmackInitialization 中无法获得 smack 版本
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【中文标题】在 Android 的 SmackInitialization 中无法获得 smack 版本【英文标题】：Could not get smack version in SmackInitialization in Android 【发布时间】：2015-11-21 19:30:07 【问题描述】：我正在为 XMPP 聊天应用程序使用 Smack。我在 SmackInitialization 类中遇到一个奇怪的异常，错误是无法确定 Smack 版本，然后是应用程序崩溃。我已经搜索了足够多，但没有找到我错的地方。请就相同问题提出可能的解决方案。
崩溃日志：
26905-26905/com.myoneapp.chat E/SmackInitialization﹕ Could not determine Smack version
java.lang.NullPointerException: lock == null
at java.io.Reader.<init>(Reader.java:64)
at java.io.InputStreamReader.<init>(InputStreamReader.java:122)
at java.io.InputStreamReader.<init>(InputStreamReader.java:57)
at org.jivesoftware.smack.SmackInitialization.<clinit>(SmackInitialization.java:61)
at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
at org.jivesoftware.smack.ConnectionConfiguration.<clinit>(ConnectionConfiguration.java:38)
at com.myoneapp.chat.services.MyXMPP.initialiseConnection(MyXMPP.java:111)
at com.myoneapp.chat.services.MyXMPP.init(MyXMPP.java:105)
at com.myoneapp.chat.services.MyXMPP.<init>(MyXMPP.java:68)
at com.myoneapp.chat.services.MyXMPP.getInstance(MyXMPP.java:78)
at com.myoneapp.chat.services.MyService.onCreate(MyService.java:37)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2877)
at android.app.ActivityThread.-wrap4(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1427)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
11-22 00:49:39.572 26905-26905/com.myoneapp.chat D/AndroidRuntime﹕ Shutting down VM
11-22 00:49:39.573 26905-26905/com.myoneapp.chat E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.myoneapp.chat, PID: 26905
java.lang.ExceptionInInitializerError
at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
at org.jivesoftware.smack.ConnectionConfiguration.<clinit>(ConnectionConfiguration.java:38)
at com.myoneapp.chat.services.MyXMPP.initialiseConnection(MyXMPP.java:111)
at com.myoneapp.chat.services.MyXMPP.init(MyXMPP.java:105)
at com.myoneapp.chat.services.MyXMPP.<init>(MyXMPP.java:68)
at com.myoneapp.chat.services.MyXMPP.getInstance(MyXMPP.java:78)
at com.myoneapp.chat.services.MyService.onCreate(MyService.java:37)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2877)
at android.app.ActivityThread.-wrap4(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1427)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: java.lang.IllegalArgumentException: is == null
at org.jivesoftware.smack.SmackInitialization.<clinit>(SmackInitialization.java:119)
at org.jivesoftware.smack.SmackConfiguration.getVersion(SmackConfiguration.java:96)
at org.jivesoftware.smack.ConnectionConfiguration.<clinit>(ConnectionConfiguration.java:38)
at com.myoneapp.chat.services.MyXMPP.initialiseConnection(MyXMPP.java:111)
at com.myoneapp.chat.services.MyXMPP.init(MyXMPP.java:105)
at com.myoneapp.chat.services.MyXMPP.<init>(MyXMPP.java:68)
at com.myoneapp.chat.services.MyXMPP.getInstance(MyXMPP.java:78)
at com.myoneapp.chat.services.MyService.onCreate(MyService.java:37)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2877)
at android.app.ActivityThread.-wrap4(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1427)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalArgumentException: is == null
at org.kxml2.io.KXmlParser.setInput(KXmlParser.java:1634)
at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java:155)
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.ConnectionConfiguration.<clinit>(ConnectionConfiguration.java:38)
at com.myoneapp.chat.services.MyXMPP.initialiseConnection(MyXMPP.java:111)
at com.myoneapp.chat.services.MyXMPP.init(MyXMPP.java:105)
at com.myoneapp.chat.services.MyXMPP.<init>(MyXMPP.java:68)
at com.myoneapp.chat.services.MyXMPP.getInstance(MyXMPP.java:78)
at com.myoneapp.chat.services.MyService.onCreate(MyService.java:37)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2877)
at android.app.ActivityThread.-wrap4(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1427)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
依赖关系：
compile files('libs/smack-android-extensions-4.1.0-rc4.jar')
compile files('libs/smack-extensions-4.1.0-rc4.jar')
compile files('libs/smack-java7-4.1.0-rc2.jar')
compile files('libs/smack-resolver-dnsjava-4.1.0-rc4.jar')
compile files('libs/smack-sasl-provided-4.1.0-rc2.jar')
compile files('libs/smack-tcp-4.1.0-rc4.jar')
compile('org.apache.httpcomponents:httpmime:4.3.6')
exclude module: 'httpclient'
compile 'com.android.support:support-v13:23.0.1'
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.mcxiaoke.volley:library:1.0.19'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.4'
compile 'com.squareup.picasso:picasso:2.4.0'
compile 'org.apache.httpcomponents:httpclient-android:4.3.5'
compile 'com.android.support:recyclerview-v7:23.0.1'
compile 'com.facebook.android:facebook-android-sdk:4.0.0'
compile 'com.google.android.gms:play-services-identity:8.1.0'
compile 'com.google.android.gms:play-services-location:8.1.0'
compile 'xpp3:xpp3:1.1.4c'
compile 'org.jxmpp:jxmpp-core:0.5.0-alpha6'
compile 'org.jxmpp:jxmpp-jid:0.5.0-alpha6'
testCompile 'org.jxmpp:jxmpp-jid:0.5.0-alpha6:tests'
testCompile 'junit:junit:4.11'
testCompile 'xmlunit:xmlunit:1.5'
testCompile 'org.powermock:powermock-module-junit4:1.5.5'
testCompile 'org.powermock:powermock-api-mockito:1.5.5'
testCompile 'com.jamesmurty.utils:java-xmlbuilder:0.6'
testCompile 'net.iharder:base64:2.3.8'
错误代码：
static
String smackVersion;
try
BufferedReader reader = new BufferedReader(new InputStreamReader(FileUtils.getStreamForUrl("classpath:org.jivesoftware.smack/version", null)));
smackVersion = reader.readLine();
try
reader.close();
catch (IOException e)
LOGGER.log(Level.WARNING, "IOException closing stream", e);
catch(Exception e)
LOGGER.log(Level.SEVERE, "Could not determine Smack version", e);
smackVersion = "unkown";
SMACK_VERSION = smackVersion;
String disabledClasses = System.getProperty("smack.disabledClasses");
if (disabledClasses != null)
String[] splitDisabledClasses = disabledClasses.split(",");
for (String s : splitDisabledClasses) SmackConfiguration.disabledSmackClasses.add(s);
try
FileUtils.addLines("classpath:org.jivesoftware.smack/disabledClasses", SmackConfiguration.disabledSmackClasses);
catch (Exception e)
throw new IllegalStateException(e);
try
Class<?> c = Class.forName("org.jivesoftware.smack.CustomSmackConfiguration");
Field f = c.getField("DISABLED_SMACK_CLASSES");
String[] sa = (String[]) f.get(null);
if (sa != null)
LOGGER.warning("Using CustomSmackConfig is deprecated and will be removed in a future release");
for (String s : sa)
SmackConfiguration.disabledSmackClasses.add(s);
catch (ClassNotFoundException e1)
catch (NoSuchFieldException e)
catch (SecurityException e)
catch (IllegalArgumentException e)
catch (IllegalAccessException e)
InputStream configFileStream;
try
configFileStream = FileUtils.getStreamForUrl(DEFAULT_CONFIG_FILE, null);
catch (Exception e)
throw new IllegalStateException(e);
try
processConfigFile(configFileStream, null);
catch (Exception e)
throw new IllegalStateException(e);
// Add the Java7 compression handler first, since it's preferred
SmackConfiguration.compressionHandlers.add(new Java7ZlibInputOutputStream());
【问题讨论】：
我有解决方案请检查：Find solution 【参考方案1】：您缺少此文件org.jivesoftware.smack/version。通常它位于 smack-core.jar 中。
【讨论】：
【参考方案2】：问题出在 processConfigFile(...) 内部，他们使用的是 Android 的 XmlPullParser，但在 junit 测试中不可用：
public static void processConfigFile(InputStream cfgFileStream,
Collection<Exception> exceptions, ClassLoader classLoader) throws Exception
XmlPullParser parser = XmlPullParserFactory.newInstance().newPullParser();
.....
【讨论】：
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