標籤:
對android:configChanges屬性,一般認為有以下幾點:
1、不設定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、設定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、設定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
但是,自從Android 3.2(API 13),在設定Activity的android:configChanges="orientation|keyboardHidden"後,還是一樣 會重新調用各個生命週期的。
因為screen size也開始跟著裝置的橫豎切換而改變。所以,在AndroidManifest.xml裡設定的MiniSdkVersion和 TargetSdkVersion屬性大於等於13的情況下,
如果你想阻止程式在運行時重新載入Activity,除了設定"orientation", 你還必須設定"ScreenSize"。
解決方案:
AndroidManifest.xml中設定android:configChanges="orientation|screenSize“
擴張:
通過設定這個屬性可以使Activity捕捉裝置狀態變化,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
設定方法:將下欄欄位用“|”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,由三位元字組成,每個國家都有自己獨立的MCC,可以識別手機使用者所屬國家。 |
| “mnc“ |
The IMSI mobile network code (MNC) has changed — that is, a SIM hasbeen detected and updated the MNC.移動網號,在一個國家或者地區中,用於區分手機使用者的服務商。 |
| “locale“ |
The locale has changed — for example, the user has selected a new language that text should be displayed in.使用者所在地區發生變化。 |
| “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.鍵盤模式發生變化,例如:使用者接入外部鍵盤輸入。 |
| “keyboardHidden“ |
The keyboard accessibility has changed — for example, the user has slid the keyboard out to expose it.使用者開啟手機硬體鍵盤 |
| “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.裝置旋轉,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.全域字型大小縮放發生改變 |
android:configChanges屬性