[Android] SharedPreferences

SharedPreferences

설명

• 앱 내부에 간단한 데이터를 저장하여 사용할 때 사용

코드

MainActivity

class MainActivity : AppCompatActivity() {
    lateinit var binding: ActivityMainBinding

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

        binding = ActivityMainBinding.inflate(layoutInflater).apply {
            setContentView(root)
            lifecycleOwner = this@MainActivity
        }
    }

    fun onClickSave(view: View) {
        val pref = getSharedPreferences("settings", 0)
        val edit = pref.edit()

        edit.putString("userName", "john")
        edit.apply()
    }

    fun onClickShow(view: View) {
        val pref = getSharedPreferences("settings", 0)

        Toast.makeText(this, pref.getString("userName", "Unknown"), Toast.LENGTH_SHORT).show()
    }
}

참고

• https://youtu.be/cyqgR8VTC1Y