QUICKBLOX 尝试在空对象引用上调用虚拟方法 sendMessage答案

【问题标题】：QUICKBLOX Attempt to invoke virtual method sendMessage on null object referenceQUICKBLOX 尝试在空对象引用上调用虚拟方法 sendMessage
【发布时间】：2017-03-14 20:30:24
【问题描述】：

我正在尝试在私人对话中发送短信，在我创建私人对话之前一切正常，但是当我发送短信时，我收到此错误“尝试调用虚拟方法'void com.quickblox.chat.QBAbstractChat.sendMessage (com.quickblox.chat.model.QBChatMessage)' 在空对象引用上"

@Override
protected void onCreate(Bundle savedInstanceState) {

    final Context context = this;

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    QBSettings.getInstance().init(getApplicationContext(), APP_ID, AUTH_KEY, AUTH_SECRET);
    QBSettings.getInstance().setAccountKey(ACCOUNT_KEY);

    QBChatService.setDebugEnabled(true);
    final QBChatService chatService = QBChatService.getInstance();
    final QBUser qbUser = new QBUser("shahzeb", "shahzeb143");
    QBAuth.createSession(qbUser).performAsync(new QBEntityCallback<QBSession>() {
        @Override
        public void onSuccess(QBSession qbSession, Bundle bundle) {
            qbUser.setId(qbSession.getUserId());


            chatService.login(qbUser, new QBEntityCallback() {
                @Override
                public void onSuccess(Object o, Bundle bundle) {


                    final QBChatDialog dialog = DialogUtils.buildPrivateDialog(25024405);
                    QBRestChatService.createChatDialog(dialog).performAsync(new QBEntityCallback<QBChatDialog>() {
                        @Override
                        public void onSuccess(QBChatDialog qbChatDialog, Bundle bundle) {

                            QBChatMessage chatMessage = new QBChatMessage();
                            chatMessage.setSenderId(qbUser.getId());
                            chatMessage.setBody("Hi there!");
                            try {
                                dialog.sendMessage(chatMessage);
                            } catch (SmackException.NotConnectedException e) {
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onError(QBResponseException e) {

                        }
                    });
                }

                @Override
                public void onError(QBResponseException e) {

                }
            });
        }

        @Override
        public void onError(QBResponseException e) {

        }
    });

}

}

【问题讨论】：

标签： android quickblox

【解决方案1】：

你必须在'qbChatDialog'模型而不是'dialog'上调用方法sendMessage(..)，或者你必须使用dialog.initForChat(QBChatService.getInstance())来初始化'dialog'进行聊天；在发送消息之前。见QuickBlox documentation

【讨论】：