我在尝试在模拟器上运行简单的应用程序时不断收到以下错误消息，但我不知道为什么。任何帮助将不胜感激：
2022-01-19 21：00：38.935 13581-13581/com.thecircle.circle_beta E/安卓运行时间：致命 异常：主要 进程： com.thecircle.circle_beta， PID： 13581 java.util.ServiceConfigurationError： org.jivesoftware.smack.xml.XmlPullParserFactory： Provider org.jivesoftware.smack.xml.stax.StaxXmlPullParserFactory 无法实例化 at java.util.ServiceLoader.fail(ServiceLoader.java：233) at java.util.ServiceLoader.access$100(ServiceLoader.java：183) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java：392) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java：416) at java.util.ServiceLoader$1.next(ServiceLoader.java：494) at org.jivesoftware.smack.xml.SmackXmlParser.getXmlPullParserFactory(SmackXmlParser.java：44) at org.jivesoftware.smack.xml.SmackXmlParser.newXmlParser(SmackXmlParser.java：65) at org.jivesoftware.smack.util.PacketParserUtils.getParserFor(PacketParserUtils.java：80) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：159) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：154) at org.jivesoftware.smack.SmackInitialization.(啪.java：103) at org.jivesoftware.smack.Smack.getVersion(Smack.java：38) at org.jivesoftware.smack.Smack.ensureInitialized(Smack.java：64) at org.jivesoftware.smack.ConnectionConfiguration.(连接配置.java：115) at org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration.builder(XMPPTCPConnectionConfiguration.java：64) at com.thecircle.circle_beta.xmpp.XMPPHandler.connect(XMPPHandler.java：30) 在com.thecircle.circle_beta。PhoneNumberActivity.startXmppService(PhoneNumberActivity.java：62) 在com.thecircle.circle_beta。电话号码活动.访问$400(电话号码活动.java：27) 在com.thecircle.circle_beta。电话号码活动$1.onClick(电话号码活动.java：53) at android.view.View.performClick(View.java：7448) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java：1131) at android.view.View.performClickInternal(View.java：7425) at android.view.view.access$3600(view.java：810) at android.view.View$PerformClick.run(View.java：28305) at android.os.Handler.handleCallback(Handler.java：938) at android.os.Handler.dispatchMessage(Handler.java：99) at android.os.Looper.loop(Looper.java：223) at android.app.ActivityThread.main(ActivityThread.java：7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java：592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java：947) 由以下原因引起：java.lang.NoClassDefFoundError：解析失败：Ljavax/xml/stream/XMLInputFactory; at org.jivesoftware.smack.xml.stax.StaxXmlPullParserFactory.(StaxXmlPullParserFactory.java：30) at java.lang.Class.newInstance(Native Method) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java：388) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java：416) at java.util.ServiceLoader$1.next(ServiceLoader.java：494) at org.jivesoftware.smack.xml.SmackXmlParser.getXmlPullParserFactory(SmackXmlParser.java：44) at org.jivesoftware.smack.xml.SmackXmlParser.newXmlParser(SmackXmlParser.java：65) at org.jivesoftware.smack.util.PacketParserUtils.getParserFor(PacketParserUtils.java：80) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：159) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：154) at org.jivesoftware.smack.SmackInitialization.(啪.java：103) at org.jivesoftware.smack.Smack.getVersion(Smack.java：38) at org.jivesoftware.smack.Smack.ensureInitialized(Smack.java：64) at org.jivesoftware.smack.ConnectionConfiguration.(连接配置.java：115) at org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration.builder(XMPPTCPConnectionConfiguration.java：64) at com.thecircle.circle_beta.xmpp.XMPPHandler.connect(XMPPHandler.java：30) 在com.thecircle.circle_beta。PhoneNumberActivity.startXmppService(PhoneNumberActivity.java：62) 在com.thecircle.circle_beta。电话号码活动.访问$400(电话号码活动.java：27) 在com.thecircle.circle_beta。电话号码活动$1.onClick(电话号码活动.java：53) at android.view.View.performClick(View.java：7448) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java：1131) at android.view.View.performClickInternal(View.java：7425) at android.view.view.access$3600(view.java：810) at android.view.View$PerformClick.run(View.java：28305) at android.os.Handler.handleCallback(Handler.java：938) at android.os.Handler.dispatchMessage(Handler.java：99) at android.os.Looper.loop(Looper.java：223)at android.app.ActivityThread.main(ActivityThread.java：7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java：592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java：947) 原因：java.lang.ClassNotFoundException： 在路径上找不到类"javax.xml.stream.XMLInputFactory"：DexPathList[[zip file "/data/app/~~aqFATXxhdyAHQijKIOYWXw==/com.thecircle.circle_beta-k5LiJXZwDyvcFdkQlSjhkw==/base.apk"]，nativeLibraryDirectory=[/data/app/~~aqFATXxhdyAHQijKIOYWXw==/com.thecircle.circle_beta-k5LiJXZwDyvcFdkQlSjhkw==/lib/x86_64，/system/lib64，/system_ext/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java：207) at java.lang.ClassLoader.loadClass(ClassLoader.java：379) at java.lang.ClassLoader.loadClass(ClassLoader.java：312) at org.jivesoftware.smack.xml.stax.StaxXmlPullParserFactory.(StaxXmlPullParserFactory.java：30) at java.lang.Class.newInstance(Native Method) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java：388) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java：416) at java.util.ServiceLoader$1.next(ServiceLoader.java：494) at org.jivesoftware.smack.xml.SmackXmlParser.getXmlPullParserFactory(SmackXmlParser.java：44) at org.jivesoftware.smack.xml.SmackXmlParser.newXmlParser(SmackXmlParser.java：65) at org.jivesoftware.smack.util.PacketParserUtils.getParserFor(PacketParserUtils.java：80) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：159) at org.jivesoftware.smack.SmackInitialization.processConfigFile(SmackInitialization.java：154) at org.jivesoftware.smack.SmackInitialization.(啪.java：103) at org.jivesoftware.smack.Smack.getVersion(Smack.java：38) at org.jivesoftware.smack.Smack.ensureInitialized(Smack.java：64) at org.jivesoftware.smack.ConnectionConfiguration.(连接配置.java：115) at org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration.builder(XMPPTCPConnectionConfiguration.java：64) at com.thecircle.circle_beta.xmpp.XMPPHandler.connect(XMPPHandler.java：30) 在com.thecircle.circle_beta。PhoneNumberActivity.startXmppService(PhoneNumberActivity.java：62) 在com.thecircle.circle_beta。电话号码活动.访问$400(电话号码活动.java：27) 在com.thecircle.circle_beta。电话号码活动$1.onClick(电话号码活动.java：53) at android.view.View.performClick(View.java：7448) at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java：1131) at android.view.View.performClickInternal(View.java：7425) at android.view.view.access$3600(view.java：810) at android.view.View$PerformClick.run(View.java：28305) at android.os.Handler.handleCallback(Handler.java：938) at android.os.Handler.dispatchMessage(Handler.java：99) at android.os.Looper.loop(Looper.java：223) at android.app.ActivityThread.main(ActivityThread.java：7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java：592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java：947)
我只是在下面运行代码：
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Context;
import android.util.Xml;
import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.android.AndroidSmackInitializer;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
import org.jivesoftware.smack.xml.XmlPullParser;
import org.jxmpp.stringprep.XmppStringprepException;
import java.io.IOException;
public class XMPPHandler extends AppCompatActivity {
private XMPPTCPConnection connection;
//private XMPPTCPConnectionConfiguration config;
public void connect() throws IOException, InterruptedException, XMPPException, SmackException {
XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration.builder()
.setXmppDomain("192.168.1.9")
.setHost("192.168.1.9")
.setPort(5222)
.setSecurityMode(ConnectionConfiguration.SecurityMode.ifpossible)
.build();
connection = new XMPPTCPConnection(config);
connection.connect();
}
//LOGIN
public void login(String username, String password) throws XMPPException, InterruptedException, IOException, SmackException {
if (connection!=null && connection.isConnected()) {
connection.login(username, password);
}
}
}
你的Smack依赖项声明可能是错误的，因为smack-xmlparser-stax在Android上没有使用(因为Android中没有StAX解析器)。而是在Android中使用smack-xmlparser-xpp3，这是smack-android的依赖项。