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环境详情（操作系统、浏览器信息、SDK版本） Android、SDK：3.20

当我登录应用程序并与其他用户聊天时的预期行为，它工作正常，但是一旦我退出应用程序并重新启动并在聊天对话框应用程序崩溃中发送消息。

实际行为应用程序不应崩溃。

日志（请使用 github gist）

FATAL EXCEPTION: main
Process: com.bhads.ibuy, PID: 7295
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.quickblox.chat.QBAbstractChat.sendMessage(com.quickblox.chat.model.QBChatMessage)' on a null object reference
at com.quickblox.chat.model.QBChatDialog.sendMessage(SourceFile:506)
at com.bhads.ibuy.ui.activity.ChatActivity.sendChatMessage(ChatActivity.java:364)
at com.bhads.ibuy.ui.activity.ChatActivity.onSendChatClick(ChatActivity.java:287)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

重现行为的步骤 -> 在应用程序中登录 -> 在用户对话框中发送消息 -> 从应用程序退出（也从后台杀死） -> 再次启动应用程序 -> 转到对话框列表活动并选择对话框 -> 键入消息并点击发送按钮，应用程序崩溃

还有其他意见吗？我也做了 reloginToChat(user) 并给出了 Success 响应。并在聊天助手类中设置以下属性

qbChatService.setDefaultPacketReplyTimeout(150000); //add this
qbChatService.setDefaultConnectionTimeout(150000);
qbChatService.setDefaultAutoSendPresenceInterval(60);

QBChatService.ConfigurationBuilder chatServiceConfigurationBuilder = new QBChatService.ConfigurationBuilder();
chatServiceConfigurationBuilder.setSocketTimeout(60); 
chatServiceConfigurationBuilder.setKeepAlive(true); 
chatServiceConfigurationBuilder.setUseTls(true); 
QBChatService.setConfigurationBuilder(chatServiceConfigurationBuilder);
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