Question

我正在使用SlidingMenu for Android，我有一个＆＃34;菜单片段＆＃34;像这样：

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"/>

单击菜单中的一个项目后，菜单将被隐藏（如假设）。但是当再次显示菜单时，没有更多选定的项目。

有没有办法保持项目的选择？

更新

根据Shereef Marzouk的建议，我改变了：

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，它有效，但我不会感觉到menu_selector.xml甚至无法切换super.onActivityCreated(savedInstanceState);

Answer 1

这就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，检查您已初始化的类，并根据该类更改BG颜色

SlidingMenu无法突出显示所选项目

1 个答案: