android - ActionBarSherlock 在选项卡导航和 ActionMode 上重叠

Question

我在使用选项卡导航和操作模式时遇到 ActionBarSherlock 的奇怪问题。

重复问题很简单，我使用演示代码生成以下示例 Activity :

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.view.ActionMode;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;

import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends SherlockFragmentActivity implements ActionBar.TabListener {
    private ActionMode actionMode = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        setTheme(com.actionbarsherlock.R.style.Theme_Sherlock);
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        for (int i = 1; i <= 2; i++) {
            ActionBar.Tab tab = getSupportActionBar().newTab();
            tab.setText("Tab " + i);
            tab.setTabListener(this);
            getSupportActionBar().addTab(tab);
        }

        actionMode = startActionMode(new TestActionMode());
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
        // TODO Auto-generated method stub
    }


    private final class TestActionMode implements ActionMode.Callback {

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            menu.add("Add").setIcon(android.R.drawable.ic_input_add).setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
            menu.add("Search").setIcon(android.R.drawable.ic_search_category_default).setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

            return true;
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            // TODO Auto-generated method stub
            return false;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            // TODO Auto-generated method stub
            return false;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            // TODO Auto-generated method stub

        }

    }

}

它在 Android 4.0 上正常工作(在真实设备和模拟器上测试)，但在 Jelly Bean 上(仅在模拟器上测试)我有以下行为。

• 应用程序启动(纵向模式)并且运行正常；
• 我轮换应用程序并且它正常工作；
• 我再次旋转应用程序，现在选项卡导航和 ActionMode 重叠(http://i.stack.imgur.com/Zf1VG.png)。

有时(但很少见)，一切都完美无缺，尤其是当我在 Dev 中启用所有动画时。设置(通常我禁用所有动画)。

我正在使用 ActionBarSherlock 4.4。

任何建议将不胜感激，因为我真的不明白我在哪里犯了错误。

感谢和问候。

Answer 1

我最近遇到了同样的问题。在浪费了几天之后，发现这种奇怪的行为是由 this issue 中描述的 UX 缺陷引起的。事实上，与 ABS (action bar sherlock) 无关.

最可靠的解决方法似乎是使用反射来控制应如何呈现操作栏:

/**
 * On Android 3.0 and above, while using the ActionBar tabbed navigation style, the tabs sometimes appear above the action bar.
 * This helper method allows you to control the 'hasEmbeddedTabs' behaviour.
 * A value of true will put the tabs inside the ActionBar, a value of false will put it above or below the ActionBar.
 *
 * You should call this method while initialising your ActionBar tabs.
 * Don't forget to also call this method during orientation changes (in the onConfigurationChanged() method).
 *
 * @param inActionBar
 * @param inHasEmbeddedTabs
 */
public static void setHasEmbeddedTabs(Object inActionBar, final boolean inHasEmbeddedTabs)
{
        // get the ActionBar class
        Class<?> actionBarClass = inActionBar.getClass();

        // if it is a Jelly Bean implementation (ActionBarImplJB), get the super class (ActionBarImplICS)
        if ("android.support.v7.app.ActionBarImplJB".equals(actionBarClass.getName()))
        {
                actionBarClass = actionBarClass.getSuperclass();
        }

        try
        {
                // try to get the mActionBar field, because the current ActionBar is probably just a wrapper Class
                // if this fails, no worries, this will be an instance of the native ActionBar class or from the ActionBarImplBase class
                final Field actionBarField = actionBarClass.getDeclaredField("mActionBar");
                actionBarField.setAccessible(true);
                inActionBar = actionBarField.get(inActionBar);
                actionBarClass = inActionBar.getClass();
        }
        catch (IllegalAccessException e) {}
        catch (IllegalArgumentException e) {}
        catch (NoSuchFieldException e) {}

        try
        {
                // now call the method setHasEmbeddedTabs, this will put the tabs inside the ActionBar
                // if this fails, you're on you own <img src="http://www.blogc.at/wp-includes/images/smilies/icon_wink.gif" alt=";-)" class="wp-smiley"> 
                final Method method = actionBarClass.getDeclaredMethod("setHasEmbeddedTabs", new Class[] { Boolean.TYPE });
                method.setAccessible(true);
                method.invoke(inActionBar, new Object[]{ inHasEmbeddedTabs });
        }
        catch (NoSuchMethodException e)        {}
        catch (InvocationTargetException e) {}
        catch (IllegalAccessException e) {}
        catch (IllegalArgumentException e) {}
}

以上代码摘自this blog post .