android - SlidingMenu 无法突出显示所选项目

Question

我正在为 Android 使用 SlidingMenu，我有一个像这样的“菜单 fragment ”:

public class MenuListFragment extends ListFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.list, null);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        String[] items = getResources().getStringArray(R.array.menu);
        ArrayAdapter<String> colorAdapter = new ArrayAdapter<String>(getActivity(),
                android.R.layout.simple_list_item_1, items);
        setListAdapter(colorAdapter);
        getListView().setSelector(R.drawable.menu_selector);
    }

    @Override
    public void onListItemClick(ListView lv, View v, int position, long id) {
        Fragment newContent = null;
        switch (position) {
            case 0:
                etc...
        }
        if (newContent != null)
            switchFragment(newContent);
        v.setSelected(true);
        lv.setSelected(true);
    }

    private void switchFragment(Fragment fragment) {
        if (getActivity() == null)
            return;

        MainActivity activity = (MainActivity) getActivity();
        activity.switchContent(fragment);
    }
}

选择器:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"
          android:exitFadeDuration="@android:integer/config_mediumAnimTime">

    <!--<item android:drawable="@android:color/transparent" android:state_pressed="true"/>-->
    <item android:drawable="@color/white" android:state_selected="true"/>
    <!--<item android:drawable="@color/red" android:state_activated="true"/>-->
    <item android:drawable="@color/black" />

</selector>

和列表布局:

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/list_padding"
    android:paddingRight="@dimen/list_padding"
    android:choiceMode="singleChoice"/>

单击菜单中的一项后，菜单将隐藏(如预期的那样)。但是当菜单再次显示时，没有更多的选择项。

有没有办法让项目保持选中状态？

更新

根据 Shereef Marzouk 的建议，我进行了更改:

public class MenuListFragment extends ListFragment {

    private View selectedView;

    ...

    @Override
    public void onListItemClick(ListView lv, View v, int position, long id) {
        Fragment newContent = null;
        switch (position) {
            // stuff
        }
        if (selectedView != null) selectedView.setBackgroundColor(getResources().getColor(R.color.aqincolor));
        v.setBackgroundColor(getResources().getColor(R.color.espresso));
        selectedView = v;
        if (newContent != null)
            switchFragment(newContent);
    }

    ...
}

在这种情况下它可以工作，但我不明白有一个即使调用 super.onActivityCreated(savedInstanceState); 也不会切换的 menu_selector.xml

Answer 1

这是我在申请中所做的:

final Class<?> currentClass = getActivity.getClass();
        switch (position) {
          case 0: //Menu
            cls = MainNavigationActivity.class;
            if (currentClass.equals(cls)) {
              view.setBackgroundColor(parent.getContext().getResources().getColor(R.color.selectedMenuBackground));
            }
            break;
        }

初始化菜单时，检查您初始化了哪个类，并根据该类更改 BG 颜色