Android 操作栏没有显示溢出

我有一个动作栏在我的应用程序与3个项目。

由于空间问题，只能显示2个，所以我希望第一个显示，其余的显示在溢出中。 但实际上只显示了前2项，并且没有检测到溢出。

以下是相关代码: List _ menu. xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:id="@+id/menu_insert"
android:icon="@android:drawable/ic_menu_add"
android:title="@string/menu_insert"
android:showAsAction="ifRoom|withText"/>
<item android:id="@+id/menu_call"
android:icon="@android:drawable/ic_menu_call"
android:title="@string/menu_call"
android:showAsAction="ifRoom|withText"/>
<item android:id="@+id/menu_agenda"
android:icon="@android:drawable/ic_menu_agenda"
android:title="@string/menu_agenda"
android:showAsAction="ifRoom|withText"/>
</menu>

Activity.java

public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater mi = getMenuInflater();
mi.inflate(R.menu.list_menu, menu);
return true;
}
81741 次浏览
小开

When you say "overflow" menu, do you mean the three dots that show up in the end to indicate that there are more items.... or do you mean the split actionbar that shows up in the bottom for overflow items?

If you mean the split action bar, you should add this to your activity's manifest file

android:uiOptions="splitActionBarWhenNarrow"

By default, the three dots overflow menu should happen automatically, so it's hard to tell what the problem is from the information you provided above.

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On devices with hardware menu buttons (Galaxy S3, stubborn as Samsung is...) the overflow menu behaves as the 'traditional' menu, by using the hardware menu button.

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If you want to show the three dots, irrespective of device menu button! then you can call this method in your application class' onCreate method-

private void makeActionOverflowMenuShown() {
//devices with hardware menu button (e.g. Samsung Note) don't show action overflow menu
try {
ViewConfiguration config = ViewConfiguration.get(this);
Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
if (menuKeyField != null) {
menuKeyField.setAccessible(true);
menuKeyField.setBoolean(config, false);
}
} catch (Exception e) {
Log.d(TAG, e.getLocalizedMessage());
}
}
小开

I realize this is not an overflow menu, but it is similar. Okay, this is simple but was hard to figure out.

You first need a menu item you want to use as the overflow inflater. Example

<item
android:id="@+id/a_More"
android:icon="@drawable/more"
android:showAsAction="always"
android:title="More">
</item>

Once you have your item, add a sub-menu containing your items you want in the overflow menu. Example:

<item
android:id="@+id/a_More"
android:icon="@drawable/more"
android:showAsAction="always"
android:title="More">
<menu>
<item
android:id="@+id/aM_Home"
android:icon="@drawable/home"
android:title="Home"/>
</menu>
</item>

On click this will inflate other items within. My application is using ActionBarSherlock 4.0 so before this will work for you, you will need to access the "SplitActionBar". (Will still work on default android Actionbar)

Here's how: In your AndroidManifest.xml file, you need to add this code under the activity you need the overflow menu in.

android:uiOptions="splitActionBarWhenNarrow"

NOTE: Your item that inflates your overflow menu MUST showAsAction="always"

Vwola! you have an overflow menu! Hope I helped you out. :)

小开

Output

Action Bar

res/menu/menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >


<!-- Search / will display always -->
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
android:showAsAction="always"
android:title="@string/action_search"/>


<!-- Location Found -->
<item
android:id="@+id/action_location_found"
android:icon="@drawable/ic_action_location_found"
android:showAsAction="always"
android:title="@string/action_location_found"/>


<!-- More -->
<item
android:id="@+id/a_More"
android:icon="@drawable/ic_action_overflow"
android:showAsAction="always"
android:title="More">
<menu>


<!-- Refresh -->
<item
android:id="@+id/action_refresh"
android:icon="@drawable/ic_action_refresh"
android:showAsAction="never"
android:title="@string/action_refresh"/>


<!-- Help -->
<item
android:id="@+id/action_help"
android:icon="@drawable/ic_action_help"
android:showAsAction="never"
android:title="@string/action_help"/>


<!-- Check updates -->
<item
android:id="@+id/action_check_updates"
android:icon="@drawable/ic_action_refresh"
android:showAsAction="never"
android:title="@string/action_check_updates"/>
</menu>
</item>


</menu>

MainActivity.java

public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
  

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
 

return super.onCreateOptionsMenu(menu);
}


}

Download the Action Bar Icon Set

小开

It appears that on devices with a menu button the overflow menu does not show in the ActionBar. Also we have no way to know if a device has a hardware menu button before API level 14 (4.0+).

This solution adds a overflow button to a android.support.v7.app.ActionBar that opens the standard options menu on pre-Honeycomb (<3.0) only, otherwise leaving it to the system. In any case you can choose between always or ifRoom for all actions.

Get the overflow icon from the Action Bar Icon Pack.

Add a menu (I'omitting some non-relevant parts as titles, ordering etc.)

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


<item
android:id="@+id/action_overflow"
android:orderInCategory="100"
android:icon="@drawable/ic_action_overflow"
app:showAsAction="always" />


<item
android:id="@+id/action_first"
app:showAsAction="always" />


<item
android:id="@+id/action_second"
app:showAsAction="ifRoom" />


</menu>

Remove our overflow action on 3.0+

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
menu.removeItem(R.id.action_overflow);
}
return super.onPrepareOptionsMenu(menu);
}

Finally call Activity.openOptionsMenu() from the overflow action.

Er... no. You cannot not call openOptionsMenu() from a menu button... but if you are using AndroidAnnotations you're done easily:

@OptionsItem
void action_overflow() {
openOptionsMenuDeferred();
}


@UiThread
void openOptionsMenuDeferred() {
openOptionsMenu();
}

If not you should do something like this, I suppose

@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == id.action_overflow) {
openOptionsMenuDeferred();
return true;
}
}


private Handler handler = new Handler(Looper.getMainLooper());
public void openOptionsMenuDeferred() {
handler.post(new Runnable() {
@Override
public void run() {
openOptionsMenu();
}
}
);
}
小开

Put xmlns:your_app_name="http://schemas.android.com/apk/res-auto" inside menu tag and instead android:showAsAction="always" use your_app_name:showAsAction="always"

for eg 

<item
android:id="@+id/action_search"
android:icon="@drawable/icon_search"
android:title="@string/search"
your_app_name:showAsAction="ifRoom"/>

小开

Try changing the theme of the app from Theme.AppCompat.Light.DarkActionBar to Theme.AppCompat.Light

小开

To alway show action overflow (three dot) on actionbarcompat:
in menu file, example:
main.xml

<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:title="@string/action_settings"
app:showAsAction="never"/>
<item
android:id="@+id/action_about"
android:title="@string/action_about"
app:showAsAction="never"/>


</menu>

and in activity file:

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

It's worked fine for me.
Tested on Google Nexus S, Samsung S3.


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