안드로이드개발 호출순서 OnCreate, Onstart, OnResume, OnPause, OnStop, OnDestroy

안드로이드개발 호출순서, 수명주기 값 저장하기

package com.example.han.h0122;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
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(getApplicationContext(),"onCreate() Call.",Toast.LENGTH_LONG).show();
    }

    @Override
    protected void onStop() {
        Toast.makeText(getApplicationContext(),"onStop() Call.",Toast.LENGTH_LONG).show();
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        Toast.makeText(getApplicationContext(),"onDestroy() Call.",Toast.LENGTH_LONG).show();

        super.onDestroy();
    }

    @Override
    protected void onPause() {
        Toast.makeText(getApplicationContext(),"onPause() Call.",Toast.LENGTH_LONG).show();

        super.onPause();
    }

    @Override
    protected void onResume() {
        Toast.makeText(getApplicationContext(),"onResume() Call.",Toast.LENGTH_LONG).show();

        super.onResume();
    }

    @Override
    protected void onStart() {
        Toast.makeText(getApplicationContext(),"onStart() Call.",Toast.LENGTH_LONG).show();

        super.onStart();
    }
}

다음과 같은 Override를 통해 어떤 메소드가 순서대로 호출되는지 확인해 봅시다.

어플을 실행시키게 되면

가장먼저 OnCreate() -> OnStart(), 인터넷연결을 위한 OnResum()이 실행 됩니다.

그리고, 뒤로가기버튼을 누르게 되면 OnPause() -> OnStop() -> OnDestroy() 순서로 진행됩니다.