My name is Nhat Doan. I am currently in SAP Student Training and Rotation (STAR) Program. In my first rotation, I have a chance to join CoE Mobile & UX team. I have learned a lot of things especially about current developments in mobile technology. Today, smartphones become essential for daily life. Businesses are using mobile applications to serve their clients and they will see many benefits such as brand building, customer connection, and profit boosts. I would like to share some topics concerning mobile development.

1. Build ProductCatalog application with AppGyver and Northwind OData service.
2. Build ProductCatalog application with SAP MDK and Northwind OData service.
3. How to style the MDK application.
4. How to run MDK application on Android Studio and override resources.
5. How to reads log, traces issue, and measures performance for MDK application.

Build ProductCatalog application with SAP MDK and Northwind OData service

The application that we are going to build will have the list of products using Northwind OData service.

Figure 1: Product List page

From the list, users can search, filter, and sort the products basing on name, category, price…

Figure 2: Product Filter page

Users can also click on the product to see the detail of the product.

Figure 3: Product Detail page

We need to finish these steps to develop the application:

• Create SAP BTP account
• Create new application in SAP Mobile Service cockpit
• Create a destination for MDK Mobile application
• Create a destination for MDK Web application
• Create SAP Mobile Application Dev Space
• Create the new Application in SAP Business Application Studio

1.Create SAP BTP account

Visit https://www.sap.com and click Log On. Click Register to create new Account. Fill the require information and click Save and Continue.

Figure 4: Register for an account

Create subaccount

Login to SAP BTP account. Select the location and click Create Account. We will have a global trial account with one subaccount and space.

Figure 5: Global account with a subaccount

2.Launch SAP Mobile Service cockpit

Open the link https://account.hanatrial.ondemand.com/cockpit. Log on to SAP Trial Account. Go to trial global account by clicking Go To Your Trial Account. Click to subaccount in global account. In the left pane, click Services -> Service Marketplace. Type Mobile in the search bar and click Mobile Services tile.

Figure 6: Mobile Service in Service Marketplace

3.Create new application in SAP Mobile Service cockpit

Navigate to SAP Mobile Service cockpit. Click Create new app. Provide the information to create the new application.

Figure 7: Create new application in Mobile Service

4.Create a destination for MDK Mobile application

Click on Mobile Connectivity and Create new Mobile Destination.

Figure 8: Mobile Connectivity in Assigned Features

Set the Destination Name to productcatalog. Set the url to: https://services.odata.org/V2/Northwind/Northwind.svc/.

Figure 9: Set destination

Click Next and keep the default value for step 2 and step 3. In step 4, set the value for SSO Mechanism to Forward Authentication.

Figure 10: Set Forward Authentication for SSO Mechanism

Click Next and click Finish.

5.Create a destination for MDK Web application

Log on to SAP Trial Account. Go to trial global account by clicking Go To Your Trial Account. Click to subaccount in global account. In the left pane, click Destinations. Click New Destination. Input the information for new destination. Destination name for MDK Mobile Application and MDK Web Application should be the same. We use productcatalog for these two destinations.

Figure 11: Set destination for MDK web application

Click Next and click Finish.

5.Create a destination for MDK Web application

Log on to SAP Trial Account. Go to trial global account by clicking Go To Your Trial Account. Click to subaccount in global account. In the left pane, click Destinations. Click New Destination. Input the information for new destination. Destination name for MDK Mobile Application and MDK Web Application should be the same. We use productcatalog for these two destinations.

Figure 12: Dev Space screen

Click Create Dev Space. Select SAP Mobile Application. Provide the name for the new dev space.

Figure 13: Select what kind of application for Dev Space

7.Create the new Application in SAP Business Application Studio

Click on the Dev Space for SAP Mobile Application. Click Start Project From Template. Select MDK Project.

Figure 14: MDK Project template

Provide the application name. Select the Application Id. Select the Destination.

Figure 15: Select Application Id and Destination for new project

Create Product List page

Create a new folder Product inside Pages folder

Figure 16:  Product folder insides Page folder

Right click on the Product folder and select MDK: New Page. Select Section Page and name the page to Product_List

Figure 17: Select Section Page

Drag Object Table from the Control section to the Product_List page.

Figure 18: Object Table in Product_List page

Service:com_sap_mdk_productcatalog.service

EntitySet: Products

QueryOptions: $expand=Category&$orderby=ProductName

Figure 19: Set value for Service, EntitySet, QueryOptions

In the Property section, delete the value of Description, DetailImage. Set the value of PreserveIconStackSpacing to false. Set the value of ProgressIndicator to empty. Delete the value of Substatus. Delete the value of Tags. Delete the value of Footnote. Delete the value of Avatars. Set the value of Status to: $(C,{UnitPrice},’USD’,”,{minimumIntegerDigits:1,minimumFractionDigits:0,maximumFractionDigits:2,useGrouping:true}). This value is used to display the price of the product. Set the value of Title to {ProductName}. Set the value of Subhead to {Category/CategoryName}.

Figure 20: Set properties for displaying product in product list

Set Product_List page to Main Page

Open Application.app. Set the value of Main Page to Product_List.page.

Figure 21: Product_List page becomes Main Page

Run the application

Right click on Application.app. Select MDK: Deploy. Select Mobiles Service Run as mobile app. Click on the icon next to Application QR Code to show the QR code. Download SAP Mobile Services Client on the phone. Open SAP Mobile Services Client on the phone. Scan the QR code from the application to run the app. We will see the list of the product.

Create Product Detail page

Go to folder Pages/Product. Right click on the Product folder select MDK: Name Page. Create new Section Page with name Product_Detail. Drag Static Key Value to the Product_Detail page. Set the Property NumberOfColumns to 1. Drag the Header in to Static Key Value. Remove the value of Caption property. Drag Key Value Item into Static Key Value. Set KeyName to Product name. Set Value to {ProductName}. Do the same for the other fields:

KeyName: Price

Value: {UnitPrice}

KeyName: Category

Value: {Category/CategoryName}

KeyName: Unit In Stock

Value: {UnitsInStock}

KeyName: Reorder Level

Value: {ReorderLevel}

Figure 22: Product_Detail page structure

Create action to navigate to Product Detail page

Right click on Action folder. Select New Folder to create new Product folder. Right click on Product folder. Select MDK: New Action. Create new Navigation Action. Set PageToOpen to Product_Detail page

Name the action to NaviToProduct_Detail.

Figure 23: NaviToProduct_Detail action

Show product detail when user click on an item of Product List page

Go to Product List page. Click on Object Table. Select Event tab. Assign OnPress event to NaviToProduct_Detail.action

Figure 24: Set Event for Product List

Create Filter Page

Navigate to folder Pages/Product. Create new Section Page with name Product_Filter

Drag Section to Product_Filter page. Set Caption property to Sort By. Drag Sorter to Section. Delete the Caption property of Sorter. Select Object collection for SortByItems property. Add four items to SortByItem with the value:

DisplayValue: Product Name

ReturnValue: ProductName

DisplayValue: Category

ReturnValue: Category

DisplayValue: Price (Low to High)

ReturnValue: UnitPrice asc

DisplayValue: Price (High to Low)

ReturnValue: UnitPrice desc

Figure 25: Product_Filter page Sort By structure

Drag another Section to the Product_Filter page. Set the Caption property to Filter by. Drag a List Picker into this Section. Set these properties for List Picker:

Service: /ProductCatalog_MDK/Services/

com_sap_mdk_productcatalog.service

EntitySet: Category

DisplayValue: {CategoryName}

ReturnValue: {CategoryName}

Figure 26: Product_Filter page Filter by structure

Assign property for Product Filter page

Click on title of Product­_Filter page. Assign the Result property with this value:

#Page:Product_Filter/#Control:SortBy/#Value

#Page:Product_Filter/#Control:CategoryFilter/#FilterValue

Figure 27: Set the Result for Product_Filter page

Create Action to navigate to Filter Page

Navigate to Actions/Product. Create new Filter action. Set PageToOpen to Product_Filter.page. Name the action to NaviToProduct_Filter.

Figure 28: NaviToProduct_Filter action

Create Filter Action Bar Item

Go to Product_List page. Drag an Action Bar Item to the top right corner of Product_List page. Set the Caption to Filter.

Figure 29: Action Bar Item to go Product_Filter page

Assign event for Filter Action Bar Item

Click on the Filter Action Bar Item. Click to the Event tab. Assign OnPress event to NaviToProduct_Filter.action.

Figure 30: Assign Event for Filter Action Bar Item

Assign event for Filter Action Bar Item

Click on the Filter Action Bar Item. Click to the Event tab. Assign OnPress event to NaviToProduct_Filter.action.

Figure 31: Reset Toolbar Item for Product_Filter page

Create ResetFilter.js Rule file

Right click on Rules folder. Create new folder Product. Right click on the Product folder. Select MDK: New Rule File.  Select Empty JS Rule. Set the Name to ResetFilter.js. Copy this value for the Rule File. This file helps to reset all the value of the controller when user click on the Rese toolbar.

export default function ResetFilter(context) {
    let formCellContainer = context.getPageProxy().getControl('FormCellContainer0');
    let controls = formCellContainer.getControls();
        
    if (controls && controls.length > 0) {
        for (let i = 0; i < controls.length; i++) {
            if (controls[i].getName() === 'SortBy') {
                // Reset the sort control to the first sort option in the group
                // Assumes the first sort option is the default sort order for the list
                controls[i].setValue(controls[i].getCollection()[0].ReturnValue);
            } else {
                // Clear any filter selections
                controls[i].setValue('');
            }
        }
    }
}

Assign ResetFilter.js to Reset Toolbar Item

Go to Product_Filter page. Click to Reset. Click to Event tab. Assign OnPress event to ResetFilter.js

Figure 32: Assign Event for Reset Toolbar Item

8.Reference

This tutorial based on

Create BTP account: https://developers.sap.com/tutorials/hcp-create-trial-account.html

Set Up Initial Configuration for an MDK App: https://developers.sap.com/tutorials/cp-mobile-dev-kit-ms-setup.html

Set Up SAP Business Application Studio for Multi-Channel Development: https://developers.sap.com/tutorials/cp-mobile-bas-setup.html

This tutorial uses

Northwind oData service: https://services.odata.org/V2/Northwind/Northwind.svc/

Conclusion

We have just finished the Product Catalog application. The application shows the list of the product. Users can search product by name, sort product by name, category, price, and filter product by category. Beside that, users can click on the product from the list to see the detail of the product.

Please let me know your feedback, questions in the comments. I would be happy to get back to you.

Check for the full implementation: https://github.com/barrydoan/ProductCatalog_MDK.git

Other helpful links in the SAP Community please visit https://blogs.sap.com/tags/668874921104038800958643358380369/