Comment implémenter la multi-sélection et ActionMode contextuel dans ActionBarSherlock?
Comment implémenter la sélection multiple sur AdapterView avec ActionBarSherlock, car il ne fournit pas MultiChoiceModeListener?
Voici à quoi ça ressemble
Comment pouvez-vous faire cela?
Alors voici ce que j'ai fait.
Edit: Plus d’un an a passé depuis que j’ai appris que la réponse précédente contenait beaucoup de code inutile (woops) et que l’obtention du code CAB peut être réalisée avec beaucoup moins d’efforts et un code plus propre, j’ai donc pris un peu de temps pour le mettre à jour.
LibraryFragment ListView doit être défini avec le 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 liste doit avoir un avant-plan? Attr/ActivéBackgroundIndicator afin de dessiner automatiquement une superposition semi-transparente mise en surbrillance sur list.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" >
....
Le 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;
}
}
votre solution est la solution la meilleure et la plus simple pour ce fil. Mais il y a un petit problème dans getView () - reportez-vous à mes commentaires ci-dessus.
int version = Android.os.Build.VERSION.SDK_INT;
if(version < 11){
if (checkedItems.contains(Integer.valueOf(position))) {
convertView.getBackground().setState(
new int[] { Android.R.attr.state_checked });
} else {
convertView.getBackground().setState(
new int[] { -Android.R.attr.state_checked });
}
}else{
if (checkedItems.contains(Integer.valueOf(position))) {
convertView.setActivated(true);
} else {
convertView.setActivated(false);
}
}
Cela vous donnera un support complet de API8 à API18