SmackInitialization: Could not determine Smack version

问题:

I am making an android plugin for Unity, I need to integrate XMPP in Unity so first I am trying to create a connection of XMPP and send and receive a message. It's working fine in android, I am able to send and receive message But when I export .jar file and use in Unity so I got below error while I create connection

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.arvaan.myplugins.ToastExample.connectXMPP(ToastExample.java:99)   at com.unity3d.player.UnityPlayer.nativeRender(Native Method)   at com.unity3d.player.UnityPlayer.a(Unknown Source)   at com.unity3d.player.UnityPlayer$b$1.handleMessage(Unknown Source)   at android.os.Handler.dispatchMessage(Handler.java:98)   at android.os.Looper.loop(Looper.java:234)   at com.unity3d.player.UnityPlayer$b.run(Unknown Source) 

I don't know what is an issue with Smack, I am new in Unity, I know how to create plugins and call method in Unity but don't know what's wrong over here.

Please check code :

public class ToastExample extends UnityPlayerActivity implements ConnectionListener, ChatManagerListener, RosterListener, PingFailedListener, StanzaListener, MessageListener, ChatMessageListener {  private static final String TAG = ToastExample.class.getSimpleName(); private AbstractXMPPConnection mConnection = null; private ChatManager chatManager; private Chat chat; private Context context; private String userName = ""; private String passWord = ""; private String objectName = ""; private static ToastExample instance;  public ToastExample() {     this.instance = this; } public static ToastExample instance() {     if (instance == null) {         instance = new ToastExample();     }     return instance; } public void setContext(Context context) { // This is also working fine     Log.e(TAG, "setContext called");     this.context = context; } public void showMessage(String message) { // I can able to see toast     Toast.makeText(this.context, message, Toast.LENGTH_SHORT).show(); }  public void connectXMPP(String host, int port, String userName, String passWord) {     Log.e(TAG, "_connectXMPP called");     XMPPTCPConnectionConfiguration.Builder configBuilder = XMPPTCPConnectionConfiguration.builder(); // Here i got error     configBuilder.setUsernameAndPassword(userName, passWord);     ...............     ............... } 

I am using below .Jar file in My Plugin and Unity

smack-core-4.1.4.jar smack-extensions-4.1.4.jar smack-im-4.1.4.jar smack-android-4.1.4.jar smack-android-extensions-4.1.4.jar smack-tcp-4.1.4.jar jxmpp-util-cache-0.4.2.jar jxmpp-core-0.4.2.jar jxmpp-jid-0.4.2.jar jxmpp-stringprep-libidn-0.4.2.jar minidns-core-0.2.0.jar** 

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Please help me to sort out this issue, Thanks in Advance.!!!

回答1:

Since nobody has answered here I how I solved it after 4 days R&D:

1. Please exrect all classes of Smack-core-4.1.1.jar file and past inside your app.
2. There is other 3 more file : version, smack-config.xml,jul.properties , Please paste this file in your Assests folder inside app.
3. In Smack packages there is one class : SmackInitialization.java, please replace below code. Code Here
4. Once you done please make .Jar file and use inside your Unity.Check Here

Let me know if you got same error i am happy to help you anytime for any solution.

Thanks

文章来源: SmackInitialization: Could not determine Smack version