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在android開發中， 通過設置ConfigChanges屬性可以使Activity捕捉設備狀態變化，以下是可以被識別的內容：
CONFIG_FONT_SCALE
CONFIG_MCC
CONFIG_MNC
CONFIG_LOCALE
CONFIG_TOUCHSCREEN
CONFIG_KEYBOARD
CONFIG_NAVIGATION
CONFIG_ORIENTATION
設置方法：將下列字段用“|”符號分隔開，例如：“locale|navigation|orientation
”
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Value
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Description
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“mcc“
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The IMSI mobile country code (MCC) has changed — that is, a SIM hasbeen detected and updated the MCC.移動國家號碼，由三位數字組成，每個國家都有自己獨立的MCC，可以識別手機用戶所屬國家。
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“mnc“
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The IMSI mobile network code (MNC) has changed — that is, a SIM hasbeen detected and updated the MNC.移動網號，在一個國家或者地區中，用於區分手機用戶的服務商。
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“locale“
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The locale has changed — for example, the user has selected a new language that text should be displayed in.用戶所在地區發生變化。
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“touchscreen“
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The touchscreen has changed. (This should never normally happen.)
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“keyboard“
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The keyboard type has changed — for example, the user has plugged in an external keyboard.鍵盤模式發生變化，例如：用戶接入外部鍵盤輸入。
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“keyboardHidden“
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The keyboard accessibility has changed — for example, the user has slid the keyboard out to expose it.用戶打開手機硬件鍵盤
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“navigation“
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The navigation type has changed. (This should never normally happen.)
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“orientation“
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The screen orientation has changed — that is, the user has rotated the device.設備旋轉，橫向顯示和豎向顯示模式切換。
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“fontScale“
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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生改變
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在Activity中添加了 android:configChanges屬性，目的是當所指定屬性(Configuration Changes)發生改變時，通知程序調用 onConfigurationChanged()函數。
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1、不設置Activity的android:configChanges時，切屏會重新調用各個生命週期，切橫屏時會執行一次，切豎屏時會執行兩次2、設置Activity的android:configChanges="orientation"時，切屏還是會重新調用各個生命週期，切橫、豎屏時只會執行一次3、設置Activity的android:configChanges="orientation|keyboardHidden"時，切屏不會重新調用各個生命週期，只會執行onConfigurationChanged方法
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