Comment pouvez-vous mettre en œuvre multi-sélection et Contextuelles ActionMode dans ActionBarSherlock?

Voici donc ce que j'ai fait.

Edit:
Au cours d'une année s'est écoulée depuis que j'ai découvert la réponse précédente a eu beaucoup de code inutile (oups) et la CABINE chose peut être réalisé avec beaucoup moins d'effort et un nettoyeur de code, j'ai donc pris un peu de temps et mis à jour il

La LibraryFragment ListView devraient être définis en mode de choix "aucun"

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:choiceMode="none"/>

L'élément de la liste doit avoir un ?attr/activatedBackgroundIndicator de premier plan afin de tirer automatiquement mis en surbrillance semi-transparentes en superposition sur la liste.setItemChecked(pos, true)

list_item_library.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:foreground="?attr/activatedBackgroundIndicator"
    android:paddingBottom="5dp"
    android:paddingTop="5dp" >

....

La ListFragment

import android.support.v4.app.DialogFragment;
import com.actionbarsherlock.app.SherlockListFragment;
import com.actionbarsherlock.view.ActionMode;
import com.actionbarsherlock.view.Menu;
public final class LibraryFragment
extends SherlockListFragment
{
private MyListAdapter adapter;
private ListView list;
//if ActoinMode is null - assume we are in normal mode
private ActionMode actionMode;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View v = inflater.inflate(R.layout.fragment_library, null);
this.list = (ListView) v.findViewById(android.R.id.list);
this.initListView();
return v;
}
@Override
public void onPause()
{
super.onPause();
if (this.actionMode != null) {
this.actionMode.finish();
}
}
@Override
public void onResume() {
super.onResume();
updateData();
}
//update ListView
protected void updateData()
{
if (adapter == null) {
return;
}
adapter.clear();
//my kinda stuff :)
File[] items = scan();
if (items != null) {
adapter.updateData(items);
if (actionMode != null) {
actionMode.invalidate();
}
}
//if empty - finish action mode.
if (actionMode != null && (files == null || files.length == 0)) {
actionMode.finish();
}
}
private void initListView()
{
this.adapter = new MyAdapter(getActivity());
this.list.setAdapter(adapter);
this.list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener()
{
@Override
public boolean onItemLongClick(AdapterView<?> arg0,
View arg1, int arg2, long arg3)
{
if (actionMode != null) {
//if already in action mode - do nothing
return false;
}
//set checked selected item and enter multi selection mode
list.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
list.setItemChecked(arg2, true);
getSherlockActivity().startActionMode(
new ActionModeCallback());
return true;
}
});
this.list.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
if (actionMode != null) {
//the items are auomatically "checked" becaise we've set AbsListView.CHOICE_MODE_MULTIPLE before
//starting action mode, so the only thing we have to care about is invalidating the actionmode
actionMode.invalidate(); //invalidate title and menus.
} else {
//do whatever you should on item click
}
}
});
}
//all our ActionMode stuff here :)
private final class ActionModeCallback
implements ActionMode.Callback
{
//" selected" string resource to update ActionBar text
private String selected = getActivity().getString(
R.string.library_selected);
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu)
{
actionMode = mode;
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu)
{
//remove previous items
menu.clear();
final int checked = list.getCheckedItemCount();
//update title with number of checked items
mode.setTitle(checked + this.selected);
switch (checked) {
case 0:
//if nothing checked - exit action mode
mode.finish();
return true;
case 1:
//all items - rename + delete
getSherlockActivity().getSupportMenuInflater().inflate(
R.menu.library_context, menu);
return true;
default:
getSherlockActivity().getSupportMenuInflater().inflate(
R.menu.library_context, menu);
//remove rename option - because we have more than one selected
menu.removeItem(R.id.library_context_rename);
return true;
}
}
@Override
public boolean onActionItemClicked(ActionMode mode,
com.actionbarsherlock.view.MenuItem item)
{
SparseBooleanArray checked;
switch (item.getItemId()) {
case R.id.library_context_rename:
//the rename action is present only when only one item is selected. 
//so when the first checked item found, show the dialog and break
checked = list.getCheckedItemPositions();
for (int i = 0; i < checked.size(); i++) {
final int index = checked.keyAt(i);
if (checked.get(index)) {
final DialogFragment d = RenameDialog.instantiate(adapter.getItem(index).getFile(), LibraryFragment.this);
d.show(getActivity().getSupportFragmentManager(), "dialog");
break;
}
}
return true;
case R.id.library_context_delete:
//delete every checked item
checked = list.getCheckedItemPositions();
for (int i = 0; i < checked.size(); i++) {
final int index = checked.keyAt(i);
if (checked.get(index)) {
adapter.getItem(index).getFile().delete();
}
}
updateData();
return true;
default:
return false;
}
}
@Override
public void onDestroyActionMode(ActionMode mode)
{
list.clearChoices();
//workaround for some items not being unchecked.
//see http://stackoverflow.com/a/10542628/1366471
for (int i = 0; i < list.getChildCount(); i++) {
(list.getChildAt(i).getBackground()).setState(new int[] { 0 });
}
list.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
actionMode = null;
}
}