onPrepareOptionsMenu有什么作用?

问题描述

我想为Android制作Option Menu，我已经访问了此站点.在他们的脚本中，我找到了onPrepareOptionsMenu，我尝试使用带或不带onPrepareOptionsMenu的Android 2.3.3编译器进行编译和运行，两者都可以，但是我看不出有什么区别.

I want to make Option Menu for Android, I have visit this site. In their script, I found onPrepareOptionsMenu, I try to compile and run using Android 2.3.3 compiler with and without onPrepareOptionsMenu, both works, but I didn't see any difference.

public boolean onCreateOptionsMenu(Menu menu){
//code here
}

public boolean onOptionsItemSelected(MenuItem item){
//code here
}

public boolean onPrepareOptionsMenu(Menu menu){
//code here
}

onPrepareOptionsMenu方法实际上是做什么的?那方法重要吗?我可以删除该方法吗?

What is actually onPrepareOptionsMenu method do? Is that method important? Could I just delete the method?

添加

哦，我也听说过Android 3.0中的Action Bar，它说操作栏是制作Option Menu的替代方法，并且它使用onPrepareOptionsMenu.是吗?

Oh, I also hear about Action Bar in Android 3.0, it says that Action Bar is the alternative way for make Option Menu, and it using onPrepareOptionsMenu. Is that right?

谢谢...

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