• 목록

리스트뷰에 Context Menu를 추가해보겠습니다.

1. 프로젝트 선택

ContextMenuTest 를 사용하여 수정하겠습니다.

2. activity_main.xml 수정

<?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"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="텍스트 뷰"
        app:layout_constraintBottom_toTopOf="@id/listView1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/textView1"
  />

</androidx.constraintlayout.widget.ConstraintLayout>

3. MainActivity.kt

package kr.co.leelab.contextmenutest

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.ContextMenu
import android.view.Menu
import android.view.MenuItem
import android.view.View
import android.widget.*

class MainActivity : AppCompatActivity() {

    private lateinit var textView1 : TextView
    private lateinit var listView1 : ListView
    var dataArr = arrayOf("사과", "복숭아", "오렌지", "자두", "배")

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

        textView1  = findViewById(R.id.textView1)
        listView1  = findViewById(R.id.listView1)

        var simpleListAdapter = ArrayAdapter(this,android.R.layout.simple_list_item_1 , dataArr)
        listView1.adapter = simpleListAdapter
        listView1.setOnItemClickListener { parent, view, position, id ->
            textView1.text = dataArr[position]
        }

        registerForContextMenu(listView1)
    }
    override fun onCreateContextMenu(
        menu: ContextMenu?,
        v: View?,
        menuInfo: ContextMenu.ContextMenuInfo?
    ) {
        super.onCreateContextMenu(menu, v, menuInfo)
        when(v?.id) {
            R.id.listView1 -> {
                menu?.setHeaderTitle("ListView의 선택")
                menuInflater.inflate(R.menu.menu_item, menu)
                //코드로 메뉴 추가
                var menuInfo = menuInfo as AdapterView.AdapterContextMenuInfo
                if(menuInfo.position %2 == 0) {
                    menu?.add(Menu.NONE, Menu.FIRST + 100, Menu.NONE, "menu4")
                }
            }
        }
    }

    override fun onContextItemSelected(item: MenuItem): Boolean {
        when(item.itemId) {
            R.id.item1 -> {
                textView1.text = "menu1\n"
                var menuInfo = item?.menuInfo as AdapterView.AdapterContextMenuInfo
                textView1.append("${menuInfo.position} 번째 메뉴 클릭됨")
                Toast.makeText(this, "item1 선택" , Toast.LENGTH_SHORT).show()
            }
            R.id.item2 -> {
                textView1.text = "menu2"
                Toast.makeText(this, "item2 선택" , Toast.LENGTH_SHORT).show()
            }
            R.id.item3 -> {
                textView1.text = "menu3"
                Toast.makeText(this, "item2 선택" , Toast.LENGTH_SHORT).show()
            }
        }
        return super.onContextItemSelected(item)
    }
}

4. 실행