Sherlock 标签无法更改方向

Posted 2023-04-15

【中文标题】Sherlock 标签无法更改方向

【英文标题】：Sherlock tabs not working on orientation change

【发布时间】：2013-09-04 18:42:28

【问题描述】：

我设法使用 Sherlock ActionBar 设置了三个选项卡。唯一的问题是，当方向改变时，标签不能再被点击了。似乎未调用 onTabSelected() 。示例：我是纵向的，并且选择了 tab2。我变成了风景。 Tab2 仍处于选中状态，我点击 tab3 但没有任何反应。然后当我再次回到纵向时，会显示 tab3。我正在 android 2.3.6 中进行测试。

这是主要活动：

public class Activity_Main extends SherlockFragmentActivity 
    ActionBar.Tab tab1, tab2, tab3;
    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setTabs();
    
    void setTabs()
        ActionBar actionBar = getSupportActionBar();

        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        tab1 = actionBar.newTab();
        tab2 = actionBar.newTab();
        tab3 = actionBar.newTab();
        tab1.setText("Week");
        tab2.setText("Today");
        tab3.setText("ToDo");

        tab1.setTabListener(new TabListener<Fragment_Start_Week>(this, "week", Fragment_Start_Week.class));
        tab2.setTabListener(new TabListener<Fragment_Start_Today>(this, "today", Fragment_Start_Today.class));
        tab3.setTabListener(new TabListener<Fragment_Start_Todo>(this, "todo", Fragment_Start_Todo.class));
    
    private class TabListener<T extends SherlockFragment> implements com.actionbarsherlock.app.ActionBar.TabListener

        private SherlockFragment mFragment;
        private final Activity mActivity;
        private final String mTag;
        private final Class<T> mClass;
        /**
         * Constructor used each time a new tab is created.
         * 
         * @param activity
         *            The host Activity, used to instantiate the fragment
         * @param tag
         *            The identifier tag for the fragment
         * @param clz
         *            The fragment's Class, used to instantiate the fragment
         */
        public TabListener(Activity activity, String tag, Class<T> clz) 
            mActivity = activity;
            mTag = tag;
            mClass = clz;
        

        /* The following are each of the ActionBar.TabListener callbacks */

        public void onTabSelected(Tab tab, FragmentTransaction ft) 
        SherlockFragment preInitializedFragment = (SherlockFragment) ((FragmentActivity) mActivity).getSupportFragmentManager().findFragmentByTag(mTag);

        // Check if the fragment is already initialized
        if (mFragment == null && preInitializedFragment == null) 
            // If not, instantiate and add it to the activity
            mFragment = (SherlockFragment) SherlockFragment.instantiate(mActivity, mClass.getName());
            ft.add(android.R.id.content, mFragment, mTag);
         else if (mFragment != null) 
            // If it exists, simply attach it in order to show it
            ft.attach(mFragment);
         else if (preInitializedFragment != null) 
            ft.attach(preInitializedFragment);
            mFragment = preInitializedFragment;
        
    

        public void onTabUnselected(Tab tab, FragmentTransaction ft) 
            if (mFragment != null) 
                // Detach the fragment, because another one is being attached
                ft.detach(mFragment);
            
        
        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) 
            // TODO Auto-generated method stub

        
    @Override
    public void onConfigurationChanged(Configuration newConfig) 
        super.onConfigurationChanged(newConfig);
    

这是一个片段：

public class Fragment_Start_Week extends SherlockFragment implements OnClickListener

    void create_table()  
                ...
    

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup group, Bundle saved)
    
        return inflater.inflate(R.layout.fragment_start_week, group, false);
    
    @Override
    public void onActivityCreated(Bundle savedInstanceState) 
        super.onActivityCreated(savedInstanceState);
        create_table();
    

    @Override
    public void onClick(View view) 
        ...

    

TIA

【问题讨论】：

你解决了这个问题吗？我很好奇，因为即使我也有同样的经历。

还没有：(我找不到任何关于这个问题的帮助。如果你找到任何解决方案，请写在这里作为答案。

【参考方案1】：

经过大量试验和错误后，我找到了解决此错误的以下方法：

@Override
public void onConfigurationChanged(Configuration newConfig) 
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
    super.onConfigurationChanged(newConfig);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

诀窍是将导航模式更改为列表，然后再更改回选项卡。