android studio java dialog ondestroy event

You will use onFocusChange() event handler to handle such event. This is called when the widget looses its focus ie. You will use onLongClick() event handler to handle such event. This is called when the user either clicks or touches or focuses upon any widget like button, text, image etc. You will use onClick() event handler to handle such event. 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.Įvent Listeners Registration − Event Registration is the process by which an Event Handler gets registered with an Event Listener so that the handler is called when the Event Listener fires the event.Įvent Handlers − When an event happens and we have registered an event listener for the event, the event listener calls the Event Handlers, which is the method that actually handles the event.Įvent Listeners & Event Handlers Event Handler There are following three concepts related to Android Event Management −Įvent Listeners − An event listener is an interface in the View class that contains a single callback method. You can capture these events in your program and take appropriate action as per requirements. The Android framework maintains an event queue as first-in, first-out (FIFO) basis.

Events are a useful way to collect data about a user's interaction with interactive components of Applications.

Android studio java dialog ondestroy event