android的一些总结——activity

Android的生命周期和和生命周期内的方法都是什么时候执行的呢？虽然看过好多次，但是每次都忘了，不妨在这里做一个小小的总结

下面是我写的一个activity，执行相应的方法会打印相应的log

package com.nantian.myaands;

import android.os.Bundle;

import android.app.Activity;

import android.util.Log;

import android.view.Menu;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

Log.e("TAG", "onCreate");

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

@Override

protected void onDestroy() {

Log.e("TAG", "onDestroy");

super.onDestroy();

}

@Override

protected void onPause() {

Log.e("TAG", "onPause");

super.onPause();

}

@Override

protected void onRestart() {

Log.e("TAG", "onRestart");

super.onRestart();

}

@Override

protected void onResume() {

Log.e("TAG", "onResume");

super.onResume();

}

@Override

protected void onStart() {

Log.e("TAG", "onStart");

super.onStart();

}

@Override

protected void onStop() {

Log.e("TAG", "onStop");

super.onStop();

}

}

1.当我打开应用的时候log日志如下

01-19 10:16:17.723: E/TAG(31804): onCreate

01-19 10:16:17.783: E/TAG(31804): onStart

01-19 10:16:17.783: E/TAG(31804): onResume

2.当我打开并推出退出应用的时候log日志如下

01-19 10:17:29.263: E/TAG(31804): onCreate

01-19 10:17:29.323: E/TAG(31804): onStart

01-19 10:17:29.323: E/TAG(31804): onResume

01-19 10:17:30.673: E/TAG(31804): onPause

01-19 10:17:31.223: E/TAG(31804): onStop

01-19 10:17:31.223: E/TAG(31804): onDestroy

3.当我打开并按home键后台运行

01-19 10:47:14.214: E/TAG(31804): onCreate

01-19 10:47:14.294: E/TAG(31804): onStart

01-19 10:47:14.294: E/TAG(31804): onResume

01-19 10:47:16.204: E/TAG(31804): onPause

01-19 10:47:16.734: E/TAG(31804): onStop

返回

01-19 10:47:29.964: E/TAG(31804): onRestart

01-19 10:47:29.964: E/TAG(31804): onStart

01-19 10:47:29.964: E/TAG(31804): onResume

4.当点击跳转到下一个activity

01-19 11:07:22.943: E/TAG(11821): onCreate

01-19 11:07:23.033: E/TAG(11821): onStart

01-19 11:07:23.033: E/TAG(11821): onResume

01-19 11:07:24.963: E/TAG(11821): onPause

01-19 11:07:25.453: E/TAG(11821): onStop

返回

01-19 11:07:29.433: E/TAG(11821): onRestart

01-19 11:07:29.433: E/TAG(11821): onStart

01-19 11:07:29.433: E/TAG(11821): onResume