片段上的ActionBar Sherlock ViewPager

Question

当我向上选择选项卡时，它起作用，但当我返回时，内容变成白色。LogCat显示：

致命异常：main java.lang.IllegalArgumentException：在Android.support.v4.app.FragmentManagerImpl.MoveToState（FragmentManager.java:903)在Android.support.v4.app.FragmentManagerImpl.MoveToState（FragmentManager.java:1088)在Android.support.v4.app.FragmentManagerImpl.MoveToState）在Android.support.v4.app.FragmentManager.ExecpendingActions（FragmentManager）中找不到id476）在com...viewpager.TabsAdapter.onTabSelect(TabsAdapter.java:76)在com.actionbarsherlock.internal.app.actionbarimpl.selectTab(actionbarimpl.java:526)在com.actionbarsherlock.internal.app.actionbarimpll$Tabimpl.select(actionbarimpl.java:907)在com.actionbarsherlock.internal.widget.scrollingtabcontainerview$TabClickListener.onClick（

我的班级：

public class TabsAdapter extends FragmentPagerAdapter implements
        ActionBar.TabListener, ViewPager.OnPageChangeListener {
    private final Context mContext;
    private final ActionBar mActionBar;
    private final ViewPager mViewPager;
    private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
    ProgressDialog dialog;

    static final class TabInfo {
        private final Class<?> clss;
        private final Bundle args;

        TabInfo(Class<?> _class, Bundle _args) {
            clss = _class;
            args = _args;
        }
    }

    public TabsAdapter(SherlockFragmentActivity activity, ViewPager pager) {
        super(activity.getSupportFragmentManager());
        mContext = activity;
        mActionBar = activity.getSupportActionBar();
        mViewPager = pager;
        mViewPager.setAdapter(this);
        mViewPager.setOnPageChangeListener(this);
    }

    public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
        TabInfo info = new TabInfo(clss, args);
        tab.setTag(info);
        tab.setTabListener(this);
        mTabs.add(info);
        mActionBar.addTab(tab);
        notifyDataSetChanged();
    }

    public int getCount() {
        return mTabs.size();
    }

    public SherlockFragment getItem(int position) {
        TabInfo info = mTabs.get(position);
        return (SherlockFragment) Fragment.instantiate(mContext,
                info.clss.getName(), info.args);
    }

    public void onPageScrolled(int position, float positionOffset,
            int positionOffsetPixels) {
    }

    public void onPageSelected(int position) {
        mActionBar.setSelectedNavigationItem(position);
    }

    public void onPageScrollStateChanged(int state) {
    }

    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        mViewPager.setCurrentItem(tab.getPosition());
        Object tag = tab.getTag();
        for (int i = 0; i < mTabs.size(); i++) {
            if (mTabs.get(i) == tag) {
                mViewPager.setCurrentItem(i);
            }
        }
    }

    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    }

    public void onTabReselected(Tab tab, FragmentTransaction ft) {
    }

}

更新：

保存ViewPager的方法：

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ConnectionChangeReceiver cm = new ConnectionChangeReceiver();
        cm.onReceive(this, getIntent());

        mViewPager = new ViewPager(this);
        mViewPager.setId(R.id.viewpager);
        setContentView(mViewPager);

        RssReaderTask.setRssUrl(this,
                "http://url?type=rss");
        SchedulerManager.getInstance().saveTask(this, "0 9-20 * * 1,2,3,4,5",
                RssReaderTask.class);
        SchedulerManager.getInstance().restart(this, RssReaderTask.class);


        NotifyClass.getInstance().setSlideCreate(true);

        if (!isOnline()) {
            showDialog(DIALOG_ERROR_CONNECTION);
            Log.d("TAG", "TRUE");
        }

        if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE) {
            // do nothing
        } else {
            this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        }
        globalvar = new GlobalVariable();
        globalvar.set_radio_encours_global(false);
        globalvar.setOnHold_global(false);

        mTabsAdapter = new TabsAdapter(this, mViewPager);

        bar = getSupportActionBar();
        bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        bar.setDisplayShowTitleEnabled(false);
        bar.setDisplayShowHomeEnabled(false);

        mTabsAdapter.addTab(bar.newTab().setText("Tab1"),
                Tab1.class, null);
        mTabsAdapter.addTab(bar.newTab().setText("Tab2"), Tab2.class,
                null);
        mTabsAdapter.addTab(bar.newTab().setText("Tab3 "),
                Tab3.class, null);
        mTabsAdapter.addTab(bar.newTab().setText("Tab4"),
                Tab4.class, null);

    }

Answer 1

你的课没问题，它应该能用，我用的也一样，它能用...我认为保存viewpager的Activity/Fragment中存在问题，所以我建议检查onCreate/onCreateView方法。
如果找不到任何东西，请发布此方法的代码，如果命名方法不是导致错误的原因，则发布类的代码。