android ConfigChanges

rayter

Activity中ConfigChanges屬性的用法

 通過設(shè)置這個屬性可以使Activity捕捉設(shè)備狀態(tài)變化，以下是可以被識別的內(nèi)容：  
CONFIG_FONT_SCALE
CONFIG_MCC
CONFIG_MNC
CONFIG_LOCALE
CONFIG_TOUCHSCREEN
CONFIG_KEYBOARD
CONFIG_NAVIGATION
CONFIG_ORIENTATION

設(shè)置方法：將下列字段用“|”符號分隔開，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.移動國家號碼，由三位數(shù)字組成，每個國家都有自己獨(dú)立的MCC，可以識別手機(jī)用戶所屬國家。
“mnc“	The IMSI mobile network code (MNC) has changed — that is, a SIM hasbeen detected and updated the MNC.移動網(wǎng)號，在一個國家或者地區(qū)中，用于區(qū)分手機(jī)用戶的服務(wù)商。
“locale“	The locale has changed — for example, the user has selected a new language that text should be displayed in.用戶所在地區(qū)發(fā)生變化。
“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.鍵盤模式發(fā)生變化，例如：用戶接入外部鍵盤輸入。
“keyboardHidden“	The keyboard accessibility has changed — for example, the user has slid the keyboard out to expose it.用戶打開手機(jī)硬件鍵盤
“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.設(shè)備旋轉(zhuǎn)，橫向顯示和豎向顯示模式切換。
“fontScale“	The font scaling factor has changed — that is, the user has selected a new global font size.全局字體大小縮放發(fā)生改變

通過一個例子介紹這個屬性的用法： 首先需要修改項(xiàng)目的manifest:
?View Code XML

<manifest xmlns:android="http://schemas.android.com/       package="com.androidres.ConfigChangedTesting"       android:versionCode="1"       android:versionName="1.0.0">     <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".ConfigChangedTesting"                   android:label="@string/app_name"                   android:configChanges="keyboardHidden|orientation">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     </application> </manifest>

在Activity中添加了 android:configChanges屬性，目的是當(dāng)所指定屬性(Configuration Changes)發(fā)生改變時，通知程序調(diào)用 onConfigurationChanged()函數(shù)