CODEWITHSUNDEEP
javaandroidonclickkotlin
Ravindra Kushwaha
Ravindra Kushwaha

Reputation: 8042

Kotlin || How to distinguish the view id from onClick() like switch statement in Android?

As we know in Android we are using the switch statement to distinct the view like below, We used to implement View.OnClickListener to get onClick interface method to perform any task

 @Override
    public void onClick(View view) {

        switch (view.getId()) {
            case R.id.imgBack:

              ///DO SOME THING HERE

                break;

            case R.id.btnSubmit:

                ///DO SOME THING HERE

                break;
        }
    }

Same thing i am using in Kotlin , by implement the View.OnClickListener and getting its overrided method like below

class FeedBackActivity : AppCompatActivity(), View.OnClickListener {
    override fun onClick(p0: View?) {

 /// HOW CAN I USE THE SWITCH STATEMENT TO DISTINGUISH THE VIEW CLICK 

    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.feed_back_screen)

        imgBack.setOnClickListener(this)


    }

}

In above code i want to use the same switch to distinguish the different view click. How can i archive this in Kotlin

I know there is another way to perform the click listener in Kotlin like below

MY_VIEW.setOnClickListener {
                Toast.makeText(this,"I have clicked",Toast.LENGTH_LONG).show()
            }

But i want to use the same interface in Kotin which we are using the Android.Please help me to short out from this problem

Upvotes: 9

Views: 8395

Answers (2)

Mibac
Mibac

Reputation: 9478

Use the when expression. It is the equivalent of Java's switch. Example code:

when(view.id) {
    R.id.imgBack -> {/* code goes here */}
    R.id.btnSubmit -> {/* you can omit the braces if there is only a single expression */}
}

Upvotes: 21

AskNilesh
AskNilesh

Reputation: 69709

try this use when :- , when expressions in Kotlin can do everything you can do with a switch and much more.

Actually, with when you can substitute the most complex if/else you can have in your code.

for more info visit this site

 when (view.id) {
    R.id.home -> perform your action here
    R.id.search -> perform your action here
    R.id.settings -> perform your action here
    else -> perform action
}

Upvotes: 4

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