Android中ProgressDialog的dismiss()与cancel()方法的区别
progressDialog,它有两个方法dialog.cancel()和dialog.dimiss()
1.publicvoidcancel()
Since:APILevel1 Cancelthedialog.Thisisessentiallythesameascallingdismiss(),butitwillalsocallyourDialogInterface.OnCancelListener(ifregistered).
2.publicvoiddismiss()
Since:APILevel1 Dismissthisdialog,removingitfromthescreen.Thismethodcanbeinvokedsafelyfromanythread.Notethatyoushouldnotoverridethismethodtodocleanupwhenthedialogisdismissed,insteadimplementthatinonStop().
其中，采用cancel()方法会调用DialogInterface.OnCancelListener()。
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