使用选项卡导航和操作模式,ActionBarSherlock出现了一个奇怪的问题。
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
}
}
}
它可以在Android 4.0(在真实设备和仿真器上测试)上正常工作,但是在Jelly Bean(仅在仿真器上测试)上,我有以下行为。
应用程序启动(人像模式),并且可以正常运行;
我旋转了应用程序,它可以正常工作;
我再次旋转应用程序,现在选项卡导航和ActionMode重叠了(http://i.stack.imgur.com/Zf1VG.png)。
有时(但很少),所有功能都可以完美运行,尤其是当我在Dev中启用了所有动画时。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。
谢谢并恭祝安康。
最佳答案
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,实际上与ABS (action bar sherlock)没有任何关系。
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) {}
}
上面的代码摘自this blog post。