Re: How to clear input field value on back

You can do the below to your navButtonTap event

navButtonTap:function(){               var oInput = sap.ui.getCore().getElementById('CUSTOMER'); // retrieving the input field present in the first view by its ID               oInput.setValue(""); // setting the input field value to null                app = sap.ui.getCore().byId("myApp");                app.to("idfirst1");            }

Regards

Sakthivel