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Kotlin-Menu_Button

생성 방법

1. res폴더 우클릭 -> Android Resource Directory -> menu type 으로 생성

2. 생성한 menu 폴더 우클릭 -> New -> Menu Resource File 생성

3. Menu / Items 들 꾸미기 ( xml 파일 )

4. Activity 파일에 Menu Create 와 ItemSelected 함수로 기능 설정하기 ( 아래 코드 참고 )

1. Create Menu

override fun onCreateOptionsMenu(menu: Menu?): Boolean {
    menuInflater.inflate(R.menu.option, menu)
    return super.onCreateOptionsMenu(menu)
}

2. ItemSelected

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    when(item.itemId){
        R.id.home -> Toast.makeText(this, "Home", Toast.LENGTH_SHORT).show()
        R.id.information -> Toast.makeText(this, "Information", Toast.LENGTH_SHORT).show()
        R.id.setting -> Toast.makeText(this, "Setting", Toast.LENGTH_SHORT).show()
    }
    return super.onOptionsItemSelected(item)
}

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