I want to Stop my function to execute, which is written in post delay, whenever I interrupt it with textChangedListner In Kotlin

Issue

I have a function written in OntextChangedListner that takes input from edittext and use it to call an API everytime you type something in edittext i.e.(if I am writing something with the string length of 10 it is calling the API 10 times).

I want that it should not call API everytime I write some thing in edittext, Whenever i stop writing then should hit API, so i tried to give a post delay so that whenever i stop writing then it will call for the API, but it is not working as i expected(if my string length is 10 then it is calling for api 10 time after some delay)

Here is My Code

override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
                val runnable = Runnable {
                    val lengthoftext = searchCompany.text.length
                    mycompanies.clear()
                    callforapi(s.toString())
                }
    
                val handler = Handler(Looper.getMainLooper())
                handler.postDelayed({ runnable.run() }, 500)
    }



fun callforapi(tempchar: String){
        val queue = Volley.newRequestQueue(this)
        val url = "SomeAPI" + tempchar
        val jsonObjectRequest = JsonObjectRequest(
            Request.Method.GET, url, null,
            { response ->
                var tempcomparray = response.getJSONArray("companies")
                var objlength = tempcomparray.length()
                adapter?.clear()
                for (i in 0 until objlength)
                {
                    var tempcompobj = tempcomparray.getJSONObject(i)
                    mycompanies.add(tempcompobj.getString("name"))


                }
                Log.d("checktheobj", mycompanies.toString())

            },
            { error ->
                Log.d("check", "Something is Wrong ")
            }
        )
        queue.add(jsonObjectRequest)
        return
    }

I am using volly library to call an API.

Please guide me how to do so.

Thankyou in Advance..

Solution

Best way to use coroutines for such a case in kotlin. If you don't know coroutines or don't want to use it. Then you can use Timer.

 private Timer timer = new Timer();
 private final long DELAY = 500; // Milliseconds

override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int){
        timer.cancel();
        timer = new Timer();
        timer.schedule(
            new TimerTask() {
                @Override
                public void run() {
                    // TODO: Do what you need here.
                    val lengthoftext = searchCompany.text.length
                    mycompanies.clear()
                    callforapi(s.toString())
                }
            },
            DELAY
        );
    }
  }
}

Answered By - Dnyaneshwar Patil