自定义AlertDialog button的样式

Android dialog.getButton(AlertDialog.BUTTON_POSITIVE) Null Pointer

http://stackoverflow.com/questions/24871973/android-dialog-getbuttonalertdialog-button-positive-null-pointer

AlertDialog API

http://www.apihome.cn/api/android/AlertDialog.html

http://stackoverflow.com/questions/4095758/change-color-of-button-in-alert-dialog-android

http://stackoverflow.com/questions/4095758/change-color-of-button-in-alert-dialog-android