Why does android need showAsAction="always" to be prefixed with an alias? -
i started journey on android development , there's 1 thing confusing me.
when creating menu items why need specify alias properties when android studio's autocomplete suggests use of android:showasaction="value"?
when using android:showasaction property ignored. if replace else works. why?
if using native action bar, use android:showasaction. time see android: prefix, know attribute defined android framework.
if using appcompat-v7 backport of action bar, comes library (appcompat-v7). libraries cannot invent new android: attributes. instead, library-defined attributes, use new namespace (e.g., app:) tied http://schemas.android.com/apk/res-auto url.
it says android: namespace not able provide access property if pretend support older android versions such 2.1
correct. in case, while android:showasaction added framework in android 3.0, part of goal of appcompat-v7 support android 2.1. while google has time machine, have not been using "retcon" android , add in attributes formerly did not exist.
(though, if did, wouldn't know it, our past have been altered have attributes, unless somehow have existence outside normal space-time continuum, seems involve wearing cape)
so, appcompat-v7 can use attributes android:icon, existed android 1.0, cannot support android:showasaction prior android 3.0. hence, have own attribute.
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