P30.kt

package alpha.dex.one

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.RatingBar
import android.widget.Toast

class Rating : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_rating)

        val simpleRatingBar = findViewById<RatingBar>(R.id.simpleRatingBar)
        val simpleRating = findViewById<RatingBar>(R.id.simpleRating)
        val submitButton = findViewById<Button>(R.id.submitButton)

        submitButton.setOnClickListener {
            val totalStars = "Total Stars: " + simpleRatingBar.numStars
            val rating = "Rating: " + simpleRatingBar.rating
            Toast.makeText(
                this, """ $totalStars$rating""".trimIndent(),
                Toast.LENGTH_LONG
            ).show()
        }

        simpleRating.setOnRatingBarChangeListener { ratingBar, rating, fromUser ->
            Toast.makeText(
                this, "rating $rating, $fromUser",
                Toast.LENGTH_LONG
            ).show()
        }
    }
}