* SharedPreferences
- 스택이 없어 질 경우 값을 저장해 놨다가 불러올 때 사용한다.
//전체를 뜻함 //거의 private 씀
- SharedPreferences pref = getSharedPreferences("pref", Activity.MODE_PRIVATE);
//수정해 줘야 하므로 Editor가 필요
SharedPreferences.Editor editor = pref.edit();
//String이라 putString메소드 이용해 값 넣기, key값과 value값
editor.putString("name", "소녀시대");
// 세팅
editor.commit();
//저장되어 있는 객체
- SharedPreferences pref = getSharedPreferences("pref", Activity.MODE_PRIVATE);
if (pref != null) {
//값 불러와 저장
String name = pref.getString("name", "");
Toast.makeText(this, "복구된 이름 : " + name, Toast.LENGTH_LONG).show();
}
package com.oneplus.lifecycle;
import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toast.makeText(this, "onCreate() 호출됨", Toast.LENGTH_LONG).show();
findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
}
@Override
protected void onPause() {
super.onPause();
Toast.makeText(this, "onPause() 호출됨", Toast.LENGTH_LONG).show();
SharedPreferences pref = getSharedPreferences("pref", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = pref.edit();
editor.putString("name", "소녀시대");
editor.commit();
}
@Override
protected void onResume() {
super.onResume();
Toast.makeText(this, "onResume() 호출됨", Toast.LENGTH_LONG).show();
SharedPreferences pref = getSharedPreferences("pref", Activity.MODE_PRIVATE);
if (pref != null) {
String name = pref.getString("name", "");
Toast.makeText(this, "복구된 이름 : " + name, Toast.LENGTH_LONG).show();
}
}
@Override
protected void onStart() {
super.onStart();
Toast.makeText(this, "onStart() 호출됨", Toast.LENGTH_LONG).show();
}
@Override
protected void onStop() {
super.onStop();
Toast.makeText(this, "onStop() 호출됨", Toast.LENGTH_LONG).show();
}
@Override
protected void onDestroy() {
super.onDestroy();
Toast.makeText(this, "onDestroy() 호출됨", Toast.LENGTH_LONG).show();
}
}
'Frontend > Android' 카테고리의 다른 글
[Oneplus 3T] updater process ended with error 7 (0) | 2017.12.02 |
---|---|
[Android] Visible, Invisible, Gone (0) | 2017.06.18 |
[Android] 권한 설정해주기, 권한 없애기 (0) | 2017.06.18 |
[Android] EditText 입력 값 가져오기, ComponetName 사용법 (0) | 2017.06.18 |
[Android] findViewByid, OnClickListener, Intent (0) | 2017.06.18 |