问题
I have an application wide menu that won't always show. Specifically specifically my issue is that when I set the target sdk version to 16 for devices with no hardware menu button The 3 dots (Action bar?) that should appear actua\lly don't.
I have the following manifest entries
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="10" />
In an avd emulator with no hardware buttons I see the 3 dots for the action bar menu
But if I set the target to 16
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="16" />
No action bar appears
I have styles set in various resource folders - values, values-v11 and values-v14
and in particular in values-v14 I have a styles.xml file that states
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar" />
The manifest entry to set the theme is
<application android:label="@string/app_name"
android:name="uk.co.pjadult.mobile.adult_reader_lib.BookLib"
android:icon="@drawable/ic_launcher"
android:theme="@style/AppTheme">
I am left wondering if I need to set up resource folders with styles for ALL sdk versions?
I am at a loss as to what the correct approach should be in order to be able to set android:targetSdkVersion="16" AND have the action bar (3 dots) menu appear
UPDATE I am now using ActionBarSherlock with no issues
回答1:
See the link @Mr.S provided, Android missing MENU button, for some more about the issue.
But to answer your questions:
I am left wondering if I need to set up resource folders with styles for ALL sdk versions?
No. It will take the highest available API. For example, if you have:
values.xmlvalues-v11.xmlvalues-v16.xml
The following example Android OS API levels would use:
- API 4:
values.xml - API 10:
values.xml - API 11:
values-v11.xml - API 13:
values-v11.xml - API 16:
values-v16.xml
And so on.
I am at a loss as to what the correct approach should be in order to be able to set android:targetSdkVersion="16" AND have the action bar (3 dots) menu appear
If the activity is full screen, any API level (min or target) above 10 will cause the dots to disappear. The only way around this is to write your own menu system, or use a shim library like ActionBarSherlock.
If the activity normally has a title bar, but you want to set the API level above 10, then you must set the Holo.Theme in code for the activity. See this Holo Everywhere blog post and Android theme, fullscreen and the action bar for how to do that.
UPDATE: Note that newer Android hardware guidelines do not require a hardware menu button. And this hack only works for devices that use soft buttons (like the Nexus 7). For devices that offer neither (like many HTC devices for example), then there will be no way for the user to get to the menu—even with this hack. It is highly recommended to switch to the action bar concept.
来源：https://stackoverflow.com/questions/12531174/android-action-bar-menu-not-showing-when-target-sdk-version-is-greater-than-10