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標(biāo)題: 跟Dialog干上了 [打印本頁(yè)]
作者: fenfenxu1989    時(shí)間: 2011-12-20 09:44
標(biāo)題: 跟Dialog干上了
protected Dialog onCreateDialog (int id, Bundle args)
Since: API Level 8

If you use showDialog(int), the activity will call through to this method the first time, and hang onto it thereafter. Any dialog that is created by this method will automatically be saved and restored for you, including whether it is showing.

當(dāng)你調(diào)用showDialog(int )方法時(shí)，系統(tǒng)會(huì)自動(dòng)調(diào)用此方法，如果是第一次調(diào)用，會(huì)根據(jù)你對(duì)onCreateDialog(int ,Bundle)的實(shí)現(xiàn)創(chuàng)建此Dialog，然后系統(tǒng)為你保存下此dialog，以備下次再調(diào)用showDialog(int)方法時(shí)直接展現(xiàn)系統(tǒng)為你保存的此Dialog，而不會(huì)再調(diào)用onCreateDialog(int ,Bundle ) 方法去創(chuàng)建Dialog。

如果你想要系統(tǒng)為你管理保存dialogs，你就得自己重寫(xiě)這個(gè)方法。當(dāng)然你也可以不選擇此方法，隨時(shí)用，隨時(shí)創(chuàng)建。

若你想讓系統(tǒng)調(diào)用此方法之前做點(diǎn)什么，你可以重寫(xiě)onPrepareDialog(int, Dialog, Bundle)方法。

Parameters
id The id of the dialog.
args The dialog arguments provided to showDialog(int, Bundle).
Returns
  • The dialog. If you return null, the dialog will not be created.




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