Context menu

1. app - src - res 에 menu경로 생성

 

2. menu폴더 우클릭 → menu 리소스 파일 → context_menu_main 생성

 

context_menu_main

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/text_color"
        android:title="글자색 변경"/>
    <item
        android:id="@+id/text_back_color"
        android:title="배경색 변경"/>
    <item
        android:id="@+id/text_bacic"
        android:title="초기화"/>
</menu>

 

3. 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="ContextMenu 보기"
            android:textSize="30sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>

 

4. build.gradle 추가

buildFeatures{
    viewBinding true
}

 

5. MainActivity.kt

class MainActivity : AppCompatActivity() {

    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }

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

        registerForContextMenu(binding.textView)
    }

    override fun onCreateContextMenu(menu: ContextMenu?, v: View?, menuInfo: ContextMenu.ContextMenuInfo?) {
        menuInflater.inflate(R.menu.context_menu_main, menu)
    }

    override fun onContextItemSelected(item: MenuItem): Boolean {
        val textView = findViewById<TextView>(R.id.textView)
        when(item?.itemId){
            R.id.text_color -> {
                textView.text = "글자색 변경"
                textView.setTextColor(Color.YELLOW)
            }
            R.id.text_back_color -> {
                textView.text = "배경색 변경"
                textView.setBackgroundColor(Color.BLUE)
            }
            R.id.text_bacic -> {
                textView.text = "초기화"
                textView.setBackgroundColor(Color.WHITE)
                textView.setTextColor(Color.GRAY)
            }
        }
        return super.onContextItemSelected(item)
    }
}