In my app, I am using OkHttpClient to send a simple HTTP request to a webserver and get a String response back. I was able to verify that the following code works. However, I can't display the received response in a Toast message box. If I try to do that, my app completely crashes. Without the Toast, app runs with no problem.
val myURL: String = "MyURL"
//creating request
val request = Request.Builder()
.url(myURL)
.build()
if (myURL.isNotEmpty()) {
val client = OkHttpClient();
client.newCall(request).enqueue(object : Callback {
override fun onFailure(call: Call, e: IOException) {
Toast.makeText(this@MainActivity, e.printStackTrace().toString(), Toast.LENGTH_SHORT).show()
}
override fun onResponse(call: Call, response: Response) {
Toast.makeText(this@MainActivity, response.body.toString(), Toast.LENGTH_SHORT).show()
}
})
}
LogCat: java.lang.NullPointerException: Can't toast on a thread that has not called Looper.prepare()
android.os.NetworkOnMainThreadException
Any idea?
