android - AlertDialog can't show custom layout -

i use following code snippet show custom dialog:

btncancel.setonclicklistener(new view.onclicklistener() {     @override     public void onclick(view v)     {         // 1. instantiate alertdialog.builder constructor         alertdialog.builder builder = new alertdialog.builder(context);          // 2. chain various setter methods set dialog         // characteristics         builder.settitle("question");          alertdialog dialog= builder.setpositivebutton("yes", new dialoginterface.onclicklistener()         {              public void onclick(dialoginterface dialog, int whichbutton)             {                 dialog.dismiss();                 callmethod();             }          }).setnegativebutton("no",  new dialoginterface.onclicklistener()         {             public void onclick(dialoginterface dialog, int which)             {                 dialog.dismiss();             }         }).create();         dialog.setcontentview(r.layout.question);         dialog.show();     } }); 

when click button, exception:

android.util.androidruntimeexception: requestfeature() must called before adding content @ com.android.internal.policy.impl.phonewindow.requestfeature(phonewindow.java:229) @ com.android.internal.app.alertcontroller.installcontent(alertcontroller.java:234) @ android.app.alertdialog.oncreate(alertdialog.java:337) @ android.app.dialog.dispatchoncreate(dialog.java:355) @ android.app.dialog.show(dialog.java:260) @ com.example.myapp.simpleactivity$2.onclick(simpleactivity.java:108) @ android.view.view.performclick(view.java:4207) @ android.view.view$performclick.run(view.java:17372) @ android.os.handler.handlecallback(handler.java:725) @ android.os.handler.dispatchmessage(handler.java:92) @ android.os.looper.loop(looper.java:137) @ android.app.activitythread.main(activitythread.java:5041) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:511) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:793) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:560) @ dalvik.system.nativestart.main(native method) 

what kind of request need?

you need call setview instead of setcontentview:

dialog.setview(r.layout.question); 

and set view before creating dialog:

dialog.setview(r.layout.question).create(); 

[edit]

 alertdialog dialog= builder.setpositivebutton("yes", new dialoginterface.onclicklistener()   {      public void onclick(dialoginterface dialog, int whichbutton)     {       dialog.dismiss();       callmethod();     }    }).setnegativebutton("no",  new dialoginterface.onclicklistener()       {         public void onclick(dialoginterface dialog, int which)         {           dialog.dismiss();         }       }).setview(r.layout.question).create();