Contextual Action Mode in Fragment Doesn't Show Up

Question

I want to make an app like this

I have followed Google's guide to enable batch contextual actions in an AbsListView. In my case, I implemented the AbsListView in a Fragment because I want users be able to change layout, I have several layouts for the Activity (a ListView, a GridView, and another AbsListView subclass). I also implement the AbsListView.MultiChoiceModeListener in a separate class because I want to reuse it in several Fragments and Activities.

My problem is: when I long-press the list item, the contextual action bar doesn't show up. It responded to a click however (shows that the selector is working).

I have checked and tried-and-error my codes over and over again to make sure I follow everything on the guide correctly, have browsed many trouble-shootings on this topic, but still I can't figure out why the contextual action bar doesn't come up.

Here is one of the Fragments:

public class List extends Bookshelf {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_list, container, false);
        ListView list = (ListView) rootView.findViewById(R.id.book_list);
        list.setAdapter(new BookListAdapter(getActivity()));

        list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
        list.setMultiChoiceModeListener(new MultiChoiceCallback(list));

        return rootView;
    }

    private static class BookListAdapter extends BaseAdapter {
        private LayoutInflater mInflater;

        public BookListAdapter(Context context) {
            mInflater = LayoutInflater.from(context);
        }

        public int getCount() {
            return 100;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;

            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.view_item_book_1text, null);
                holder = new ViewHolder();
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            return convertView;
        }

        static class ViewHolder {
            TextView title;
            ImageView cover;
        }
    }
}

Here is the MultiChoiceModeListener (MultiChoiceCallback.java):

public class MultiChoiceCallback implements MultiChoiceModeListener {
    AbsListView usingView;

    public MultiChoiceCallback(AbsListView view) {
        usingView = view;
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        switch (item.getItemId()) {
        case R.id.bookDetails:
            break;
        case R.id.category:
            break;
        case R.id.delete:
            break;
        }
        return false;
    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        mode.getMenuInflater().inflate(R.menu.select_book, menu);
        return false;
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        return false;
    }

    @Override
    public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
        final int checkedCount = usingView.getCheckedItemCount();
        switch (checkedCount) {
            case 0:
                mode.setTitle(null);
                break;
            case 1:
                mode.setTitle("1 item selected");
                break;
            default:
                mode.setTitle("" + checkedCount + " items selected");
                break;
        }
    }
}

The layout for the Fragment (layout/fragment_list.xml):

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/book_list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</ListView>

The View list item that is inflated (layout/view_item_book_1text.xml):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="51dp"
    android:background="@color/blue_when_clicked"
    android:clickable="true"
    android:focusable="true"
    android:layout_marginLeft="3dp"
    android:layout_marginRight="3dp"
    android:gravity="center_vertical"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/cover"
        android:contentDescription="@string/cover"
        android:layout_width="75dp"
        android:layout_height="45dp"
        android:layout_marginTop="3dp"
        android:layout_marginBottom="3dp"
        android:scaleType="fitCenter"
        android:src="@drawable/cover_02" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="3dp"
        android:text="A Book Title"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>

The color selector for each list item (color/blue_when_clicked.xml):

<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:drawable="@drawable/color_light_blue" android:state_pressed="true"/>  <!-- pressed -->
    <item android:drawable="@drawable/color_light_gray" android:state_focused="true"/>  <!-- focused -->
    <item android:drawable="@drawable/color_light_gray" android:state_activated="true"/> <!-- selected -->
</selector>

Any help would be very appreciated!

Answer 1

Aha! Found the bug! It is because of the

android:clickable="true"
android:focusable="true"

in the layout/view_item_book_1text.xml

Sorry to bother everyone! Hope this becomes a troubleshooting note for someone else