2

我对 ActionBarSherlock 有一个奇怪的问题，使用选项卡导航和操作模式。

重复问题很简单，我使用演示代码生成以下示例活动：

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（仅在模拟器上测试）我有以下行为。

  • 应用程序启动（纵向模式）并且它工作正常；
  • 我旋转应用程序，它工作正常；
  • 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），一切都很完美，特别是如果我在 Dev 中启用了所有动画。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。

谢谢并恭祝安康。

4

1 回答 1

1

I recently came across to the same issue. After wasting few days on it, found out that this weird behavior is caused by UX flaw described in this issue and, in fact, has nothing to do with ABS (action bar sherlock).

The most reliable workaround seems to be using reflection to control how action bar should be rendered:

/**
 * 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) {}
}

The above code was taken from this blog post.

于 2014-03-11T13:30:51.077 回答