問題描述

說是Module中的R文件下的id不是final的。然后Butterknife就不行。。。估計別的注解類型的也不好使吧。。。于是乎有什么辦法么。。

詳見：https://github.com/JakeWharton/butterknife/issues/100

以下是作者JakeWharton在14年12月的原話。。。

Yes this is not supported. This is a tradeoff between ease-of-use and what I tolerate as a sane API.

The only way to accomplish something like this is to allow string values like this:

@InjectView(name = 'content_frame') protected FrameLayoutcontentFrame; The downside’s to this are:

The downside’s to this are:

It’s not rename-safe or compile-safe (kind of). If you open the layout XML for this and do an IDE-backed rename operation it will not catch this string and update it. It also means you can (technically) compile the above code if there is no content_frame ID that exists. Now the compilation will eventually fail because the generated code will become invalid.

It’s hard to know what R class to reference in the generated code, especially when you take into consideration the fact that you can use references to IDs that exist in libraries that you are referencing.

It forces us to have defaults for both the value and name properties on each annotation which means you can write @InjectView Foo foo and Butter Knife will have to fail the builder rather than javac.

Because of these facts, I have chosen not to support library projects.

One way that this could potentially be solved is to use a Gradle plugin rather than an annotation processor. I don’t have the time to explore something like that for a few months though.

問題解答

Android Studio Prettify

這個插件自動生成findViewById等內容，你可以試試。 你說Butterknife不能用，應該是你用錯了吧，你仔細看看是不是用錯了。

module中好像也沒看到別的，還是直接使用findViewById吧

現在基本不用butterknife了，直接封裝一個方法在BaseActivity或BaseFragment

//BaseActivitypublic <T extends View> T $(@IdRes int resId){ return (T)super.findViewById(resId);}//BaseFragmentpublic <T extends View> T $(View layoutView, @IdRes int resId){ return (T)layoutView.findViewById(resId);}//使用TextView tvName=$(R.id.tv_name);回答4：

這個也行，功能比較多https://github.com/excilys/androidannotations

最好使用系統自帶的findviewyid來查找id,第三方的工具之間使用會存在沖突

RoboGuice?或者android annotation?