Show Menu item always in support action bar

问题

I am working on android application . I have implemented supported action bar in it .I want to show option menu item always . But it is not showing . it is showing in drop down menu . my code for menu item given below.

<item
    android:id="@+id/action_settings"
    android:icon="@drawable/add_post"
    android:title="@string/action_settings"

    />

And code of ActionBar Activity is given below:-

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return super.onCreateOptionsMenu(menu);
}

any help will be appreciated.

回答1:

From docs you should add showAsAction attribute to always or ifRoom

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- Search, should appear as action button -->
    <item android:id="@+id/action_search"
          android:icon="@drawable/ic_action_search"
          android:title="@string/action_search"
          android:showAsAction="ifRoom" />
    <!-- Settings, should always be in the overflow -->
    <item android:id="@+id/action_settings"
          android:title="@string/action_settings"
          android:showAsAction="never" />
</menu>

回答2:

If you use the AppCompat ActionBar, you have to change your layout in this way:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto" >
    <item
        android:id="@+id/action_settings"
        android:icon="@drawable/add_post"
        android:title="@string/action_settings"
        app:showAsAction="always" />
</menu>

showAsAction attribute will work only with a custom prefixe, see the documentation. According to it:

Notice that the showAsAction attribute above uses a custom namespace defined in the tag. This is necessary when using any XML attributes defined by the support library, because these attributes do not exist in the Android framework on older devices.

Hope this helps.

回答3:

You can use the different values of android:showAsAction property in android menu xml file..

to show all time visible menu on actionbar, you should go with android:showAsAction="always"..

You can also use android:showAsAction="ifRoom" but it will show the menu in action bar not always but it will show according to different screen size.

Edited

Ref: Menu items doesn't show up on the actionbar

Try with the below code then..

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto" >
    <item
        android:id="@+id/menu_lang"
        app:showAsAction="always" <!-- app:showAsAction="ifRoom" -->
        android:title="@string/menu_lang"
        android:icon="@android:drawable/ic_input_lang"/>
</menu>

Hope it will help you..!!!

回答4:

remove this line xmlns:app="http://schemas.android.com/apk/res-auto"

use android:showAsAction="always" instead of app:showAsAction="always"

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/action_refresh"
    android:icon="@drawable/ic_refresh"
    android:showAsAction="ifRoom"
    android:title="@string/action_refresh"/>

<item
    android:id="@+id/action_filter"
    android:icon="@drawable/ic_filter"
    android:showAsAction="always"
    android:title="@string/action_filter"/>
</menu>

回答5:

I realize this question is 2+ years old, but for completeness, if you want to set this in code use the following:

menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);

other options are

MenuItem.SHOW_AS_ACTION_NEVER
MenuItem.SHOW_AS_ACTION_IF_ROOM
MenuItem.SHOW_AS_ACTION_ALWAYS
MenuItem.SHOW_AS_ACTION_WITH_TEXT
MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW

来源：https://stackoverflow.com/questions/22243405/show-menu-item-always-in-support-action-bar

标签

android

android-actionbar

optionmenu