Activity的生命周期（一）

/**
* 一、重识Activity:一个Activity的生命周期
* 从创建到销毁：三状态六节点
* 		可见状态：onCreate onStart onResume
* 		隐藏状态：onPause onStop
* 		销毁状态：onDestroy
* 二、横竖屏旋转Activity的生命周期
* 		创建Activity：
* 			OneActivity onCreate --> OneActivity onStart --> OneActivity onResume
*
* 		休眠Activity：
* 			OneActivity onPause --> OneActivity onStop
*
* 		唤醒Activity：
* 			OneActivity onRestart() --> OneActivity onStart --> OneActivity onResume
*
* 		退出Activity：
* 			OneActivity onPause --> OneActivity onStop --> OneActivity onDestroy
*
* 		旋转Activity：
* 			OneActivity onPause --> OneActivity onStop --> OneActivity onDestroy --> OneActivity onCreate --> OneActivity onStart --> OneActivity onResume
*
* @author 贾涛
*
*/
public class OneActivity extends Activity {

private String TAG = "OneActivity";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.e(TAG, "onCreate");
}

@Override
protected void onStart() {
super.onStart();
Log.e(TAG, "onStart");
}

@Override
protected void onRestart() {
super.onRestart();
Log.e(TAG, "onRestart");
}

@Override
protected void onResume() {
super.onResume();
Log.e(TAG, "onResume");
}

@Override
protected void onPause() {
super.onPause();
Log.e(TAG, "onPause");
}

@Override
protected void onStop() {
super.onStop();
Log.e(TAG, "onStop");
}

@Override
protected void onDestroy() {
super.onDestroy();
Log.e(TAG, "onDestroy");
}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.imooc.activitystudy.OneActivity" >

<TextView
android:id="@+id/tv_actName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />

</RelativeLayout>