44.5 Adding an OnClick Gesture
Although a simple MotionLayout animation transition has been created, we still need a way to start the animation from within the running app. This can be achieved by assigning either a click or swipe handler. For this example, we will configure the animation to start when the button is clicked by the user. Within the MotionLayout editor, begin by pausing the timeline animation if it is currently running on a loop setting. Next, select the Transition arrow (marked A in Figure 44-9 above), locate the OnClick attribute section in the Attributes tool window and click on the + button indicated by the arrow in Figure 44-10 below:
An empty row will appear in the OnClick panel for the first property. For the property name, enter targetId and for the value field enter the id of the button (@id/myButton). Click the + button a second time, this time entering clickAction into the property name field. In the value field, click the down arrow...
