1. Activity Life Cycle(Activity 수명 주기) 및 Log 남기기

Log 사용법

 

 

 

 

Activity Life Cycle 

 

 

 

MainActivity.java

 

package com.ktds.mylifecycle;
 
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.widget.Toast;
 
 
public class MainActivity extends ActionBarActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Toast.makeText(this,"onCreate 실행 됨",Toast.LENGTH_SHORT).show();
 
        // tag, message
        Log.d("LC","onCreate 실행 됨");
    }
 
    @Override
    protected void onStart() {
        super.onStart();
 
        Toast.makeText(this,"onStart 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onStart 실행 됨");
 
    }
 
    @Override
    protected void onResume() {
        super.onResume();
 
        Toast.makeText(this,"onResume 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onResume 실행 됨");
 
    }
 
    @Override
    protected void onRestart() {
        super.onRestart();
 
        Toast.makeText(this,"onRestart 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onRestart 실행 됨");
 
    }
 
    @Override
    protected void onPause() {
        super.onPause();
 
        Toast.makeText(this,"onPause 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onPause 실행 됨");
 
    }
 
    @Override
    protected void onStop() {
        super.onStop();
 
        Toast.makeText(this,"onStop 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onStop 실행 됨");
 
    }
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
 
        Toast.makeText(this,"onDestroy 실행 됨",Toast.LENGTH_SHORT).show();
        Log.d("LC", "onDestroy 실행 됨");
 
    }
}
 

 

 

App 실행

 

onCreate -> onStart -> onPause

 

back button 클릭

 

onPause -> onStop

 

재실행

 

onRestart -> onPause

 

Home Button 클릭

 

onStop -> onDestory