横竖屏切换时Activity的生命周期
一、Activity 的 ConfigChanges 属性
官方解释： 通过设置这个属性可以使Activity捕捉设备状态变化，以下是可以被识别的内容：
CONFIG_FONT_SCALE
CONFIG_MCC
CONFIG_MNC
CONFIG_LOCALE
CONFIG_TOUCHSCREEN
CONFIG_KEYBOARD
CONFIG_NAVIGATION
CONFIG_ORIENTATION
设置方法：将下列字段用“|”符号分隔开，例如：“locale|navigation|orientation”
Value
Description
“mcc“
The IMSI mobile country code (MCC) has changed — that is, a SIM hasbeen detected and updated the MCC.移动国家号码，由三位数字组成，每个国家都有自己独立的MCC，可以识别手机用户所属国家。
“mnc“
The IMSI mobile network code (MNC) has changed — that is, a SIM hasbeen detected and updated the MNC.移动网号，在一个国家或者地区中，用于区分手机用户的服务商。
“locale“
The locale has changed — for example, the user has selected a new language that text should be displayed in.用户所在地区发生变化。
“touchscreen“
The touchscreen has changed. (This should never normally happen.)
“keyboard“
The keyboard type has changed — for example, the user has plugged in an external keyboard.键盘模式发生变化，例如：用户接入外部键盘输入。
“keyboardHidden“
The keyboard accessibility has changed — for example, the user has slid the keyboard out to expose it.用户打开手机硬件键盘
“navigation“
The navigation type has changed. (This should never normally happen.)
“orientation“
The screen orientation has changed — that is, the user has rotated the device.设备旋转，横向显示和竖向显示模式切换。
“fontScale“
The font scaling factor has changed — that is, the user has selected a new global font size.全局字体大小缩放发生改变
二、横竖屏切换时候 Activity 的生命周期
1、没有设置
ConfigChanges时，android:screenOrientation="sensor"
2、设置
android:screenOrientation="sensor"
android:configChanges="orientation" 或者 android:configChanges="orientation|keyboardHiden"
ps：测试平台为android4.1的硬件平台