activity 标签总结1

activity:screenOrientation限制横竖屏切换默认是允许横竖屏切换的

android:screenOrientation="unspecified" 默认值，由系统选择方向。所使用的策略，the choices made in specific contexts , may differ from device to device

android:screenOrientation="portrait"切换横竖屏时限制此屏竖屏显示

android:screenOrientation="landscape"切换横竖屏时限制此屏横屏显示

android:screenOrientation="user" 切向用户当前所指定的方向 the user's current preffered orientation

android:screenOrientation="behind" 切向栈中当前activiry 的下方首个activity 所指向的方向 the same orientation as the acrivity that's

immediately beneath 在...之下it in the activity stack

android:screenOrientation=“sensor” 由物理传感器决定方向

android:screenOrientation="nosensor"方向不再由物理传感器决定，所使用的策略跟 unspecified 一样

activity:configChanges 当activity 的配置结构在运行时发生变化， activity默认会关闭并且重新启动，但是申明这个属性会阻止activity 重启。activity会保持运行并且

调用 onConfigrationChange() 方法

注释：应尽量避免使用这个属性，作为下下策，更多处理运行时变化情况，请看 Handing Runtime Changes

CONFIG_FONT_SCALE
CONFIG_MCC
CONFIG_MNC
CONFIG_LOCALE
CONFIG_TOUCHSCREEN
CONFIG_KEYBOARD
CONFIG_NAVIGATION
CONFIG_ORIENTATION

imsi :

国际移动用户识别码（IMSI：International Mobile SubscriberIdentification Number）是区别移动用户的标志，储存在SIM卡中，可用于区别移动用户的有效信息。其总长度不超过15位，同样使用0～9的数字。其中MCC是移动用户所属国家代号，占3位数字，中国的MCC规定为460；MNC是移动网号码，最多由两位数字组成，用于识别移动用户所归属的移动通信网；MSIN是移动用户识别码，用以识别某一移动通信网中的移动用户。

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.用户本地发生变化。例如跟换手机语种
“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

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