Fire BarcodeScannerButton after View loads - sapui5

Question

I have implemented a scanner button on my Fiori/UI5 application. I used sap.ndc.BarcodeScannerButton and created that button on the controller (I cannot seem to create the button on my view.xml).
Anyway, I need to fire this button after the view loads. I have a master-detail application. The scanner button is on the master view ofcourse.
First thing I did was call the button itself. But my first problem is that the button does not accept an id as a parameter. It tells me that app cannot accept duplicate id. So what I did was just look for the button id. I was able to locate it (e.g. _button9) but whenever I call it via sap.ui.getCore.byId() there are times that it returns "undefined." That's why I cannot call firePress();
Another problem I have is where to put this firePress() method. I tried to put it on method onAfterRendering() assuming that again due to the undefined button I cannot call the method firePress(). I have tried putting it on other methods like after the data has been successfully called by using method attachRequestCompleted. No luck.
Below is the code
/*
* Copyright (C) 2009-2014 SAP SE or an SAP affiliate company. All rights reserved
*/
jQuery.sap.require("sap.ca.scfld.md.controller.ScfldMasterController");
jQuery.sap.require("ui.s2p.srm.sc.create.util.Formatter");
jQuery.sap.require("sap.ndc.BarcodeScannerButton");
var counter = 0;
sap.ui.controller("ui.s2p.srm.sc.create.SRM_SC_CREExtension.view.S2Custom", {
onInit: function() {
sap.ca.scfld.md.controller.ScfldMasterController.prototype.onInit.call(this);
this.oBundle = this.oApplicationFacade.getResourceBundle();
this.isRoot = true;
this.oRouter.attachRouteMatched(function(e) {
if (e.getParameter("name") === "master" && !this.isRoot && Object.keys(e.getParameter("arguments")).length === 0) {
var d = sap.ui.core.routing.History.getInstance().getDirection("shoppingCartCheckout/" + this.tempCartId);
if (d === "Unknown") {
this.isRoot = true;
this._oControlStore.oMasterSearchField.clear()
} else {
if (this.getList() !== null) {
var i = this.getList().getSelectedItem();
if (i !== null) {
//alert("setListGo");
this.setListItem(i);
}
}
}
}
this.isRoot = (this.isRoot) ? false : this.isRoot;
}, this);
// alert(sap.ui.getCore().byId("productScanButton"));
this.onBarcodeScanning();
this.setEmptyCart(true);
this.showAllProducts(); //added by salduam to show all products
},
backToList: function() {
//alert("back");
},
getDefaultUserSettings: function(r) {
var o = function(D, R) {
this.tempCartId = D.results[0].TEMP_CART_ID;
if (!jQuery.device.is.phone) {
if (r) {
this.oRouter.navTo("noData", {
viewTitle: "DETAIL_TITLE",
languageKey: "NO_ITEMS_AVAILABLE"
}, true)
} else {
this.navToEmptyView()
}
}
};
var d = this.oApplicationFacade.getODataModel("getdefusrset");
d.read("DefaultUserSettings?ts=" + Date.now(), null, null, true, jQuery.proxy(o, this), jQuery.proxy(this.onRequestFailed, this))
},
applySearchPatternToListItem: function(i, f) {
if (f.substring(0, 1) === "#") {
var t = f.substr(1);
var d = i.getBindingContext().getProperty("Name").toLowerCase();
return d.indexOf(t) === 0
} else {
return sap.ca.scfld.md.controller.ScfldMasterController.prototype.applySearchPatternToListItem.call(null, i, f)
}
},
getHeaderFooterOptions: function() {
var o = {
sI18NMasterTitle: "MASTER_TITLE",
buttonList: []
};
return o
},
isBackendSearch: function() {
return true
},
//call startReadListData with parameter wildcard
showAllProducts: function(e) {
var startSearchText = "*";
this.startReadListData(startSearchText);
//alert("called");
},
applyBackendSearchPattern: function(f, b) {
//added by salduam
//if search field is blank, automatically call showAllProducts
if (f == "") {
this.showAllProducts()
};
if (f != "" && f != null) {
this.startReadListData(f)
} else {
this.setEmptyCart(false)
}
},
startReadListData: function(f) {
var o = function(D, r) {
var m = new sap.ui.model.json.JSONModel(D.results);
this.getView().setModel(m);
this.getList().destroyItems();
this.getList().bindAggregation("items", {
path: "/",
template: this.oTemplate.clone(),
filter: [],
sorter: null
});
this.registerMasterListBind(this.getList());
};
var e = encodeURIComponent(f);
//console.log("EEEE-----"+ e);
var d = this.oApplicationFacade.getODataModel();
//console.log(d);
d.read("CATALOG_ITEM?$filter=startswith(description,'" + e + "')&$top=20", null, null, true, jQuery.proxy(o, this), jQuery.proxy(this.onRequestFailed,
this));
},
setListItem: function(i) {
// alert("onClick");
var b = i.getBindingContext();
var m = b.oModel.oData[parseInt(b.sPath.split('/')[1])];
this.oRouter.navTo("detail", {
tempCartId: this.tempCartId,
contextPath: b.getPath().substr(1)
}, true);
var c = sap.ui.core.Component.getOwnerIdFor(this.oView);
var C = sap.ui.component(c);
C.oEventBus.publish("ui.s2p.srm.sc.create", "refreshDetail", {
data: m
});
},
setEmptyCart: function(r) {
var e = new sap.ui.model.json.JSONModel({
results: []
});
this.oRouter.navTo("noData", {
viewTitle: "DETAIL_TITLE",
languageKey: "NO_ITEMS_AVAILABLE"
}, true);
this.getView().setModel(e);
this.oTemplate = new sap.m.ObjectListItem({
type: "{device>/listItemType}",
title: "{matnr}",
press: jQuery.proxy(this._handleItemPress, this),
number: "{parts:[{path:'itm_price'},{path:'itm_currency'}],formatter:'ui.s2p.srm.sc.create.util.Formatter.formatPrice'}",
numberUnit: "{itm_currency}",
attributes: [new sap.m.ObjectAttribute({
text: "{description}"
})],
});
this.getList().bindAggregation("items", {
path: "/results",
template: this.oTemplate,
filter: [],
sorter: null,
});
this.registerMasterListBind(this.getList());
this.getDefaultUserSettings(r)
},
onRequestFailed: function(e) {
jQuery.sap.require("sap.ca.ui.message.message");
sap.ca.ui.message.showMessageBox({
type: sap.ca.ui.message.Type.ERROR,
message: e.message,
details: e.response.body
})
},
onExit: function() {},
onBarcodeScanning: function(oEvent) {
var productScanButton = new sap.ndc.BarcodeScannerButton({
provideFallback: "{/btnFallback}",
width: "100%",
scanSuccess: function(oEvent) {
var barcodeID = oEvent.getParameter("text");
sap.m.MessageToast.show(barcodeID);
var searchField = sap.ui.getCore().byId("__field3");
searchField.setValue(barcodeID);
searchField.fireSearch();
}
});
this.getView().byId("barCodeVBox").addItem(productScanButton);
},
onAfterRendering: function(oEvent) {},
onBeforeRendering: function() {}
});

Answer 1

For placing the fire() method. Are you trying to display a pop-up barcode reader? something similar to the pop-up of the app "SD_SO_CRE" (where customer selection dialog is load before master view).
they do not solve the task with fire()...