actionlayout on menuitem does nothing

问题:

i am setting an actionLayout on a menu item and setting background color and image, but it's not respected. in my activity, i have:

getMenuInflater().inflate(R.menu.submit_action, menu);

my submit_action is:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item android:id="@+id/action_submit"
        android:actionLayout="@layout/check"
        app:showAsAction="always"  />
</menu>

my check layout is

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    style="?android:attr/actionButtonStyle"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#e8e8e8"
    android:clickable="true"
    android:contentDescription="lol" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:contentDescription="@null"
        android:scaleType="centerInside"
        android:src="@drawable/ic_action_tick" />

</RelativeLayout>

but even with all of this setup, this is how the action bar appears, not showing my menuitem at all (but it's there, because it responds to the click, but doesn't appear):

回答1:

Try app:actionLayout="@layout/check" instead of android:actionLayout="@layout/check".

If you're using ActionbarSherlock or AppCompat, the android: namespace will not work for MenuItems. This is because these libraries use custom attributes that mimic the Android APIs since they did not exist in earlier versions of the framework.

回答2:

when using Appcompact ,menu item will be like

<item android:id="@+id/cart"
    app:actionLayout="@layout/actionbar_cart"
    android:title="@string/action_cart"
    app:showAsAction="always"
 />

回答3:

The answer from Ben Harris is absolutely correct. However, in some case like when using attributes like:

      app:showAsAction="ifRoom|collapseActionView"

used in SearchView (in my case), the layout view isn't shown and that caused a lot of headache to me. It seems that collapseActionView is not supported with action view in appcombat. So consider this as well while doing your stuffs.