Test

package com.example.testbilling

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Button
import android.widget.Toast
import com.android.billingclient.api.*
import kotlinx.coroutines.*


class MainActivity : AppCompatActivity() {

    lateinit private var billingClient: BillingClient

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

         val purchasesUpdatedListener =
                PurchasesUpdatedListener { billingResult, purchases ->
                    // To be implemented in a later section.
                }

        var billingClient = BillingClient.newBuilder(this)
                .setListener(purchasesUpdatedListener)
                .enablePendingPurchases()
                .build()



        val startBC = findViewById<Button>(R.id.buttonStartBillingClient)
        startBC.setOnClickListener(View.OnClickListener {

            billingClient.startConnection(object : BillingClientStateListener {
                override fun onBillingSetupFinished(billingResult: BillingResult) {
                    if (billingResult.responseCode ==  BillingClient.BillingResponseCode.OK) {
                        // The BillingClient is ready. You can query purchases here.
                        Toast.makeText(applicationContext, "The BillingClient is ready.",Toast.LENGTH_LONG).show()



                        //////////////////////////////////////////

                        val response = billingClient.isFeatureSupported(BillingClient.FeatureType.SUBSCRIPTIONS)

                        if (response.responseCode == BillingClient.BillingResponseCode.OK) {
                            Toast.makeText(applicationContext, "Subscription supported",Toast.LENGTH_LONG).show()



                            //////////////////////
                            val mycoolSKUS = listOf("onemonthsub")
                            val params = SkuDetailsParams.newBuilder().setSkusList(mycoolSKUS).setType(BillingClient.SkuType.SUBS).build()


                            billingClient.querySkuDetailsAsync(params) { billingResult, skuDetailsList ->


                                when (billingResult.responseCode) {

                                    BillingClient.BillingResponseCode.OK -> {

                                        if (skuDetailsList.orEmpty().isNotEmpty()) {

                                            Toast.makeText(applicationContext,
                                                "Cool!", Toast.LENGTH_LONG).show()

                                         }
                                        else {
                                            Toast.makeText(applicationContext,
                                                "Not cool!", Toast.LENGTH_LONG).show()

                                            //////////// I AM HERE NOW///////////////
                                            // Toast shows "Not cool!"
                                            ////////////////////////////////////////

                                          }


                                    }


                                    else -> {
                                        Toast.makeText(applicationContext, "Not ok...", Toast.LENGTH_LONG)
                                            .show()
                                    }

                                }


                            }
                            /////////////////////


                        }
                        else
                        {
                            Toast.makeText(applicationContext,
                            "Subscription not supported, error response: \n$response",
                             Toast.LENGTH_LONG).show()
                        }

                        /////////////////////////////////////////


                    }
                }
                override fun onBillingServiceDisconnected() {
                    // Try to restart the connection on the next request to
                    // Google Play by calling the startConnection() method.
                    Toast.makeText(applicationContext, "Disconnected!",Toast.LENGTH_LONG).show()
                }
            })


        })
    }
}