¿Cuándo llamar al detector de eventos en el marco de Android?

When to call event listener in Android framework?

An event listener is an interface in the View class that contains a single callback method. These methods will be called by the Android framework when the View to which the listener has been registered is triggered by user interaction with the item in the UI. Included in the event listener interfaces are the following callback methods:

This is a supplemental answer to show more detail of how an OnTouchListener can be used. Put this somewhere in your activity or fragment.

These methods are called by the Android framework when the respective action occurs on that object. For instance, when a View (such as a Button) is touched, the onTouchEvent () method is called on that object.

OnClick is triggered when the user releases the button. But if you still want to use the TouchListener you need to add it in code. It’s just: Thanks for contributing an answer to Stack Overflow!

This pattern is often used as part of the operating system, and the best example of the built-in interface in the Android core is OnClickListener, which is in charge of a click-through event. This listener is defined within the View.java class.

In this case, defining the callback method is done by invoking the setter method and by naming the “anonymous” object that implements the interface and the callback method itself. In order to be able to call the method from the second class, it is necessary to call it through the first class object or object that implements the interface.

Defining a callbackMetode can be done in two ways depending on what the listener is. In this case, defining the callback method is done by invoking the setter method and by naming the “anonymous” object that implements the interface and the callback method itself.