Question

我设法使用Sherlock ActionBar设置三个标签。唯一的问题是，当方向改变时，不能再点击标签。似乎没有调用onTabSelected（）。示例：我在纵向，并且选中了tab2。我变成了lanscape。 Tab2仍然被选中，我点击tab3但没有任何反应。然后，当我再次回到肖像时，会显示tab3。我在Android 2.3.6中测试。

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

Answer 1

经过大量的试验和错误后，我找到了以下解决方案：

@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更改回标签。

Sherlock标签不适用于方向更改

1 个答案: