Why avoid abstract methods of the Kotlin class

This article shares with you about why abstract methods of the Kotlin class are avoided. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Avoid abstract methods of the Kotlin class

Also use lambdas as much as possible. This allows for more concise and intuitive code. For example, click monitoring in Java is as follows:

Public interface OnClickListener {void onClick (View v);}

Use in Java:

View.setOnClickListener (new View.OnClickListener () {@ Override public void onClick (View view) {/ / do something}})

In Kotlin:

View.setOnClickListener {view-> / / do something} / / can also be view.setOnClickListener {/ / do something} view.setOnClickListener () {/ / do something}

If you are using a single abstract method in Kotlin:

View.setOnClickListener (object: OnClickListener {override fun onClick (v: View?) {/ / do things}})

Here is another way:

Private var onClickListener: (View)-> Unit)? = nullfun setOnClickListener (listener: (view: View)-> Unit) {onClickListener = listener} / / later, to invokeonClickListener?.invoke (this) Thank you for reading! This is the end of this article on "Why avoid abstract methods of Kotlin classes". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!