SharedPreferences.Editor commit ->apply

     最近在做APP卡顿情况原因的排查，发现其中一个容易出现的优化点share preference.edit 经常在主线程中调用commit。通常我们是不需要commit结果的，完全可以替换为apply()方法。至于两者区别可以参考官方说明：

    

abstract void	apply() Commit your preferences changes back from this Editor to the  SharedPreferences object it is editing.
abstract  SharedPreferences.Editor	clear() Mark in the editor to remove  all values from the preferences.
abstract boolean	commit() Commit your preferences changes back from this Editor to the  SharedPreferences object it is editing.