Two main forms of onClick events in Android development: androidonclick

Two main forms of onClick events in Android development: androidonclick

The first and most common form is to add a listener for The onClick event to stimulate the event to be processed when the button is clicked. For example:

Btn1.setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {// TODO Auto-generated method stubToast. makeText (MainActivity. this, "" + "by adding a listener for The onClick () event", Toast. LENGTH_LONG ). show ();}});

Second form: android: onClick =""Method for adding a response to a property.

Layout file:

<Button android: layout_width = "match_parent" android: layout_height = "wrap_content" android: onClick = "submit" android: text = "android: how to add a response method to The onClick attribute "/>

Class Code:

/*** This method is called in the layout file **/public void submit (View view) {Toast. makeText (MainActivity. this, "" + "by adding a response method for the android: onClick attribute", Toast. LENGTH_LONG ). show ();}

Tip: the second method must be declared as public, and the parameter must be of the View type; otherwise, the layout file android: onClick =""The specified method cannot be found.

Program running:

 

In android development, how does one implement the flying effect of an image when an onClick event is triggered?

Animation effect? You have a clear requirement.
 
How does android write another OnClick event in The OnClick event of the Button?

You mean the button has two onclick events.