Android：重命名gui元素与新布局

Question

I'm new into android and i'm dealing with the following problem. I need to create a button which groups another two buttons of similar features (sort of submenu). So let's say we have a button called "search", by clicking on it the search button should disappear and the two buttons (eg "google" and "bing") should be seen on the screen.

So, my idea was to manage all three buttons programmatically in the same layout instead of creating a new (temp)layout just to show and handle the two buttons. Like a state machine. More precisely it would be like this:

We press on the "search" button. onClick(View) determines wheter we are on the main screen (mode=mainmenu), renames the search button to "google" and creates the second button named "bing", or (mode=submenu) then call the function of the button due to the search button is already renamed to "google"...

By pressing the back button onBackPressed() checks if we are in the submenu (mode=submenu) then hide the "bing" button and rename "google" to "search", otherwise we are in the main menu (mode=mainmenu), finish the activity.

Does this make sense at all? Besides this will produce lots of code with rising count of buttons and (sub)menus and worse maintainability for further changes.

Thanks!

PS Sorry if my english sucks (not my native language) ;-)

Answer 1

You can create an button that remain invisible(gone, to be exact) until the "search" button is pressed, and rename the original search button. It works, and it will be easier to implement if you set up layout in xml. It also give you a preview that shows what it looks like. To show widget programmatically will have code that hard to maintain.

However, the design that change button text is not a good design. First, when the "search" is pressed, changing its text is very confusing. I personally suggest you to pop-out a selection dialog. Or just show both search button at first place, unless you really do not have place for two button.

Answer 2

那是太多的代码，并且需要太多的调试，所以我认为，更好的方法是创建一个新的布局。

Answer 3

Well if you have performance issues or expecting performance issues can arise (due to complexity of you GUI) then may be this make sense. But if not, code simplicity is more important than slight increase in performance.