[Android][Kotlin] chip 동적 추가하기

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[Android] chip 동적 추가하기

 

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chip을 동적으로 추가, 삭제하는 기능을 만들어보자.

최종 완성에서는 다음과 같은 기능이 있다.

• chip 추가
• chip 삭제
• 모든 chip 이름 확인하기

 

핵심 코드

chip group 객체의 addView 메소드를 이용해 chip을 추가해준다.

chip의 apply 중괄호 안에서 chip의 속성을 정의해준다.

 

val chipGroup = findViewById<ChipGroup> (R.id.chip_group)
var chipName = "새로운 chip"

chipGroup.addView(Chip(this).apply {
    text = chipName // text 세팅
    isCloseIconVisible = true // x 버튼 보이게 하기
    setOnCloseIconClickListener { binding.chipGroup.removeView(this) } // x버튼 눌렀을 때 삭제되기
})

 

전체 코드

activity_chip.xml

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

    <EditText
        android:id="@+id/edt"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="name of chip"
        app:layout_constraintEnd_toStartOf="@id/btn"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/btn"
        app:layout_constraintWidth_percent="0.5" />

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:text="add chip"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/edt"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.chip.ChipGroup
        android:id="@+id/chip_group"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/btn"
        app:layout_constraintWidth_percent="0.8" />

    <Button
        android:id="@+id/btn_check"
        android:layout_width="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_height="wrap_content"
        android:text="check chip list"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

 

ChipActivity.kt

package com.example.testfunction

import android.os.Bundle
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.example.testfunction.databinding.ActivityChipBinding
import com.google.android.material.chip.Chip


class ChipActivity : AppCompatActivity() {
    private val binding by lazy { ActivityChipBinding.inflate(layoutInflater) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)

        binding.btn.setOnClickListener {
            val string = binding.edt.text
            if (string.isNullOrEmpty()) {
                showToast("chip 이름을 입력해주세요")
            } else {
                binding.chipGroup.addView(Chip(this).apply {
                    text = string
                    isCloseIconVisible = true
                    setOnCloseIconClickListener { binding.chipGroup.removeView(this) }
                })
            }
        }
        binding.btnCheck.setOnClickListener {
            val chipList = ArrayList<String>()
            for (i: Int in 1..binding.chipGroup.childCount) {
                val chip: Chip = binding.chipGroup.getChildAt(i - 1) as Chip
                chipList.add(chip.text.toString())
            }

            var output = "count: ${chipList.size}\n"
            for (i in chipList) {
                output += "$i / "
            }
            showToast(output)
        }
    }

    private fun showToast(message: String) {
        Toast.makeText(applicationContext, message, Toast.LENGTH_LONG).show()
    }
}

 

완성