Android操作栏不显示溢出该怎么办?

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这里是相关的代码: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;
}

提问于
用户回答回答于

RES /菜单/ menu.xml文件:

<?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>

Naenachtivitykjawa:

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);
    }

}

用户回答回答于

如果你想显示三个点,不管设备菜单按钮!那么你可以在你的应用程序类中调用这个方法'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());
    }
}

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