코틀린 Kotlin seekbar / ratingbar (별점) 안드로이드 화면에 나타내고 textview랑 연결하기

Seekbar

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
    <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0"
            android:textSize="30sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.298"/>

    <SeekBar
            android:layout_width="464dp"
            android:layout_height="55dp"
            android:id="@+id/seekBar"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintHorizontal_bias="0.588"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.example.sample25

import android.os.Build
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.SeekBar
import android.widget.TextView
import androidx.annotation.RequiresApi



class MainActivity : AppCompatActivity() {

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

        val seekBar = findViewById<SeekBar>(R.id.seekBar)
        val textView = findViewById<TextView>(R.id.textView)

        seekBar.max = 1000



        seekBar.setOnSeekBarChangeListener(object :SeekBar.OnSeekBarChangeListener{
            override fun onProgressChanged(p0: SeekBar?, progress: Int, p2: Boolean) {
                textView.text = "$progress"
            }

            override fun onStartTrackingTouch(p0: SeekBar?) {
            }

            override fun onStopTrackingTouch(p0: SeekBar?) {
            }
        })

    }
}

결과 화면

---

Ratingbar

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="0.0"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.317"
            android:id="@+id/textView"/>
    <RatingBar
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/ratingBar"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintVertical_bias="0.408"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

package com.example.sample26

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.RatingBar
import android.widget.TextView

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


        val ratingBar = findViewById<RatingBar>(R.id.ratingBar)
        val textView = findViewById<TextView>(R.id.textView)

        ratingBar.setOnRatingBarChangeListener{ ratingBar, rating, fromUser->
            textView.text="$rating"

        }
    }
}

실행화면