In SAP Fiori Elements, "extensionAPI" is a powerful tool for customizing and extending Fiori Elements applications. It provides a set of APIs (Application Programming Interface) that allow developers to customize and enhance Fiori Elements applications through code. With the help of extensionAPI, developers can add new functions and modify existing behaviors or interfaces according to specific business needs without affecting the standard Fiori Elements functions, so as to achieve a more personalized user experience. extensionAPI is a flexible and extensible development method provided by the Fiori Elements framework, enabling developers to maintain a certain degree of flexibility and customization while using Fiori Elements to develop applications. In the following content, I will introduce the concept and components of extensionAPI in detail, as well as a specific example to illustrate its usage and function.
Concept and Components:
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The concept of extensionAPI : extensionAPI is a set of APIs in the SAP Fiori Elements framework for extension and customization when developing applications. It allows developers to enhance and improve the behavior, interface and functions of Fiori Elements applications by writing code to meet specific business needs.
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API collection : extensionAPI contains multiple APIs, each API represents a specific set of functions or operations. Developers can selectively use these APIs according to their needs to realize the customization of Fiori Elements applications.
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Can be used at different levels : extensionAPI can be used for extensions at different levels. It can be extended at the view level (View Level) and controller level (Controller Level). At the view level, developers can change the appearance and layout of the application; at the controller level, they can change the behavior and logic of the application.
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Compatibility : By using extension API, developers can maintain the compatibility of their applications. Because extensionAPI allows Fiori Elements applications to be extended without modifying the original standard Fiori Elements codes, application updates and upgrades will be more convenient and stable.
Example of extensionAPI:
In order to better understand the usage and role of extensionAPI, we will create a simple Fiori Elements application and extend it using extensionAPI. Suppose we have an "Employee" (employee) business scenario, and now we want to add a custom button in the Fiori Elements application. After clicking the button, a dialog box can pop up to display the specific information of the employee.
Step 1: Create a Fiori Elements app
First, we need to create a basic Fiori Elements application. We can use SAP Web IDE or other suitable development tools to create the application. Here we assume that the application is a List Report application based on the "Employee" entity. In the process of creating the application, we select the List Report template and associate the "Employee" entity.
Step 2: Add a custom button
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In the View Level of the Fiori Elements application, we need to add a custom button to the page. Here we use the "Header Facet" API in extensionAPI to add the button to the header area of the application.
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Add the following configuration to your application's "manifest.json" file:
"extends": {
"extensions": {
"sap.ui.viewExtensions": {
"sap.suite.ui.generic.template.ListReport.view.ListReport": {
"HeaderFacet|standardHeaderExtension": {
"className": "sap.ui.core.Fragment",
"fragmentName": "my.custom.fragment",
"type": "XML"
}
}
}
}
}
In the above configuration, we use the "sap.ui.viewExtensions" API to extend the view. We add a custom Fragment to the "HeaderFacet" as an extension of the header area.
Step 3: Create a custom Fragment
Next, we need to create a custom Fragment that will contain our desired custom buttons. In SAP Web IDE, we can create a new "fragments" folder under the application's "webapp" folder and create a file called "custom.fragment.xml" inside it. In that file we add the following code:
<core:FragmentDefinition xmlns="sap.m" xmlns:core="sap.ui.core">
<OverflowToolbarButton text="Show Details" press="onShowDetailsPress"/>
</core:FragmentDefinition>
In the above code, we create an OverflowToolbarButton with the text "Show Details" and bind a press event "onShowDetailsPress".
Step 4: Add event processing logic
Finally, we need to add event handling logic in the Controller Level of the Fiori Elements application to respond to the click event of the custom button and display employee specific information.
Add the following code in the controller:
sap.ui.controller("my.app.controller.ListReport", {
onShowDetailsPress: function (oEvent) {
var oSelectedEmployee = oEvent.getSource().getBindingContext().getObject();
// 可根据 oSelectedEmployee 中的员工信息显示员工的特定信息
// 弹出对话框或进行其他逻辑处理
}
});
In the above code, we defined the "onShowDetailsPress" method in the controller, which is called when the custom button click event is triggered. We obtain the selected employee information by obtaining the data context bound to the button, and perform corresponding logic processing based on the employee information.
Summarize:
Through the above examples, we can see the usage and function of extensionAPI. By using extensionAPI, we can easily add custom functions in Fiori Elements applications.