Kotlin URL().readText() crashes application

I'm trying to get some text from my website and toast it, but I get android.os.NetworkOnMainThreadError when running

var str = URL("https://server.necrodragon41.repl.co/server/connect").readText(Charset.forName("ISO-8859-1"))  Toast.makeText(applicationContext, str, Toast.LENGTH_SHORT).show()  

And the app crashes. Here is my code:

RegisterBtn.setOnClickListener {              if (day.toString() != "0" && month.toString() != "0" && year.toString() != "0") {                  try {                      var t = Thread(Runnable {                          var str = URL("https://server.necrodragon41.repl.co/server/connect").readText(Charset.forName("ISO-8859-1"))                          Toast.makeText(applicationContext, str, Toast.LENGTH_SHORT).show()                      })                      t.start()                  } catch (e: Exception) {                      Toast.makeText(applicationContext, e.toString(), Toast.LENGTH_SHORT).show()                  }              } else {                  ErrorText.text = "The date is invalid."                  ErrorText.visibility = View.VISIBLE              }          }  

I tried making the thread because i got toasted the error (before putting the code into a thread). How can I get the string without crashing the app?

https://stackoverflow.com/questions/65756235/kotlin-url-readtext-crashes-application January 17, 2021 at 08:44AM