android - Api.Ai App crash -


below code on app button click crashes app.

sendbutton.setonclicklistener(new view.onclicklistener() {            @override            public void onclick(final view view) {                string text = string.valueof(chattext.gettext());                if(text !=null && !text.isempty()){                    airequest.setquery(text);            }                new  asynctask<airequest, void, airesponse>() {                @override                protected airesponse doinbackground(airequest... requests) {                    final airequest request = requests[0];                    try {                        final airesponse response = aidataservice.request(airequest);                        return response;                    } catch (aiserviceexception e) {                    }                    return null;                }                @override                protected void onpostexecute(airesponse airesponse) {                    if (airesponse != null) {                        onresult(airesponse);                    }                }            }.execute(airequest);            }          });

i have speech listener works fine above code text query crashing app. appreciated. thank you

log

androidruntime: fatal exception: main androidruntime: process: com.example.khan.servicedeskbot, pid: 4567 androidruntime: java.lang.nullpointerexception: attempt invoke virtual method 'void ai.api.model.airequest.setquery(java.lang.string)' on null object reference androidruntime:        @ com.example.khan.servicedeskbot.mainactivity$3.onclick(mainactivity.java:156) androidruntime:        @ android.view.view.performclick(view.java:5610) androidruntime:        @ android.view.view$performclick.run(view.java:22265) androidruntime:        @ android.os.handler.handlecallback(handler.java:751) androidruntime:        @ android.os.handler.dispatchmessage(handler.java:95) androidruntime:        @ android.os.looper.loop(looper.java:154) androidruntime:        @ android.app.activitythread.main(activitythread.java:6077) androidruntime:        @ java.lang.reflect.method.invoke(native method) androidruntime:        @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:866) androidruntime:        @ com.android.internal.os.zygoteinit.main(zygoteinit.java:756) activitymanager:   force finishing activity com.example.khan.servicedeskbot/.mainactivity


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