程序包 ohos.aafwk.abilityjet.databinding

类 DataBindingUtil

java.lang.Object

ohos.aafwk.abilityjet.databinding.DataBindingUtil

public class DataBindingUtil
extends Object

A utility class of DataBinding that obtains DataBinding objects.

You can define attributes of the class to be bound in a layout file. After compilation, the corresponding DataBinding child class will be automatically generated. You can call the createBinding(int,ohos.app.Context,java.lang.String) method to obtain the generated DataBinding child class object for further initialization and binding.

从以下版本开始:

1

另请参阅:

DataBinding

SystemCapability

SystemCapability.Aafwk#ABILITYJET

方法概要

限定符和类型	方法	说明
static <T extends DataBinding> T	createBinding(int layoutId, Context context)	Obtains the declared DataBinding object based on the given layout file ID and Context object.
static <T extends DataBinding> T	createBinding(int layoutId, Context context, String packageName)	Obtains the declared DataBinding object based on the given layout file ID, Context object, and HAP package name.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

createBinding

public static <T extends DataBinding> T createBinding(int layoutId,
                                                      Context context)
                                               throws IOException

Obtains the declared DataBinding object based on the given layout file ID and Context object.

You must specify a valid layout file ID and Context object as the input parameters. Otherwise, this method will throw an exception.

参数:

layoutId - Indicates the ID of the resource layout file.

context - Indicates the application context.

返回:

Returns the DataBinding child class object if one has been declared; returns null otherwise.

抛出:

IOException - Throws this exception if the specified resource layout file fails to be accessed.

IllegalArgumentException - Throws this exception if a parameter value is invalid.

从以下版本开始:

4

createBinding

public static <T extends DataBinding> T createBinding(int layoutId,
                                                      Context context,
                                                      String packageName)
                                               throws IOException

Obtains the declared DataBinding object based on the given layout file ID, Context object, and HAP package name.

You must specify a valid layout file ID, Context object, and HAP package name as the input parameters. Otherwise, this method will throw an exception.

参数:

layoutId - Indicates the ID of the resource layout file.

context - Indicates the application context.

packageName - Indicates the package name of the specified HAP (module).

返回:

Returns the DataBinding child class object if one has been declared; returns null otherwise.

抛出:

IOException - Throws this exception if the specified resource layout file fails to be accessed.

IllegalArgumentException - Throws this exception if a parameter value is invalid.

从以下版本开始:

5