CURD (Common Shared Preferences) SharedPreference : 간단한 Kotlin 클래스를 사용하여 값-키 쌍 형식으로 데이터를 저장합니다.
var sp = SharedPreference(this);
데이터 저장 :
String, Int 및 Boolean 데이터를 저장하기 위해 이름이 같고 매개 변수가 다른 세 가지 메서드가 있습니다 (메소드 오버로딩).
save("key-name1","string value")
save("key-name2",int value)
save("key-name3",boolean)
데이터 검색 : SharedPreferences에 저장된 데이터를 검색하려면 다음 방법을 사용하십시오.
sp.getValueString("user_name")
sp.getValueInt("user_id")
sp.getValueBoolean("user_session",true)
모든 데이터 지우기 : 전체 SharedPreferences를 지우려면 아래 코드를 사용하십시오.
sp.clearSharedPreference()
특정 데이터 제거 :
sp.removeValue("user_name")
공통 공유 선호 클래스
import android.content.Context
import android.content.SharedPreferences
class SharedPreference(private val context: Context) {
private val PREFS_NAME = "coredata"
private val sharedPref: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
//********************************************************************************************** save all
//To Store String data
fun save(KEY_NAME: String, text: String) {
val editor: SharedPreferences.Editor = sharedPref.edit()
editor.putString(KEY_NAME, text)
editor.apply()
}
//..............................................................................................
//To Store Int data
fun save(KEY_NAME: String, value: Int) {
val editor: SharedPreferences.Editor = sharedPref.edit()
editor.putInt(KEY_NAME, value)
editor.apply()
}
//..............................................................................................
//To Store Boolean data
fun save(KEY_NAME: String, status: Boolean) {
val editor: SharedPreferences.Editor = sharedPref.edit()
editor.putBoolean(KEY_NAME, status)
editor.apply()
}
//********************************************************************************************** retrieve selected
//To Retrieve String
fun getValueString(KEY_NAME: String): String? {
return sharedPref.getString(KEY_NAME, "")
}
//..............................................................................................
//To Retrieve Int
fun getValueInt(KEY_NAME: String): Int {
return sharedPref.getInt(KEY_NAME, 0)
}
//..............................................................................................
// To Retrieve Boolean
fun getValueBoolean(KEY_NAME: String, defaultValue: Boolean): Boolean {
return sharedPref.getBoolean(KEY_NAME, defaultValue)
}
//********************************************************************************************** delete all
// To clear all data
fun clearSharedPreference() {
val editor: SharedPreferences.Editor = sharedPref.edit()
editor.clear()
editor.apply()
}
//********************************************************************************************** delete selected
// To remove a specific data
fun removeValue(KEY_NAME: String) {
val editor: SharedPreferences.Editor = sharedPref.edit()
editor.remove(KEY_NAME)
editor.apply()
}
}
블로그 :
https://androidkeynotes.blogspot.com/2020/02/shared-preference.html