Seek bar

 

seek bar를 조작하면 해당하는 숫자가
텍스트뷰에 나오도록 해보자

1. 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"
            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="0.41"
            android:id="@+id/textView"/>
    <SeekBar
            android:layout_width="459dp"
            android:layout_height="43dp"
            android:id="@+id/seekBar"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.503"/>

</androidx.constraintlayout.widget.ConstraintLayout>

 

2. MainActivity.kt

class MainActivity : AppCompatActivity() {

    @RequiresApi(Build.VERSION_CODES.O)
    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 = 10
        seekBar.min = 2

        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?) {

            }
        })
    }
}

seek bar의 최댓값과 최솟값을 지정해 줄 수 있다.

seekBar.max = 10
seekBar.min = 2

 

 

결과물