実際には使用できないActionBarSherlockでコンテキスト メニューを使用したい。ListView.CHOICE_MODE_MULTIPLE_MODAL
リスト上の項目を複数選択するための独自の実装を作成しましたが、問題は (実際には他の場合には優れた機能です) Android が でビューを再利用することですListView。背景を色付けして選択済みとしてマークすることで、リスト上の複数選択アイテムを処理します。さらに、選択を保存しSparseArrayますが、完全に機能しているため、今は問題ありません。
ご想像のとおり、背景色は、選択したアイテムから始まるリストの 10 アイテムごとに複製されます。
では、リスト項目ごとに異なるビューを提供するにはどうすればよいでしょうか? それとも、その問題に対する別の解決策がありますか？
SimpleCursorAdapterwithを使用しViewBinderてリスト項目を埋めます。
/***************************************
******** ACTION MODES HANDLING ********
***************************************/
@Override
public boolean onItemLongClick(AdapterView<?> parent, View v, int position, long id) {
switchActionMode();
if (isInActionMode) {
checkItem(position, v);
startActionMode();
}
else {
uncolorAndClearAllItems();
actionMode.finish();
}
return true;
}
private void switchActionMode() {
isInActionMode ^= true;
}
private void checkItem(int position, View v) {
boolean isChecked = isItemChecked(position);
setItemChecked(position, v, !isChecked);
colorItem(v, !isChecked);
}
private boolean isItemChecked(int position) {
return checkedItems.get(position, false);
}
private void startActionMode() {
actionMode = activity.startActionMode(new ActionModeCallback());
}
private void setItemChecked(int position, View v, boolean isChecked) {
if (isChecked) {
checkedItems.put(position, true);
}
else {
checkedItems.delete(position);
}
}
private void colorItem(View v, boolean isChecked) {
int color;
if (isChecked) {
color = COLOR_BLUE;
}
else {
color = Color.TRANSPARENT;
}
v.setBackgroundColor(color);
}
private void colorItem(int position, boolean isChecked) {
View listItemView = listView.getChildAt(position);
colorItem(listItemView, isChecked);
}
private final class ActionModeCallback implements ActionMode.Callback {
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
activity.getSupportMenuInflater().inflate(R.menu.list_action_menu, menu);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
isInActionMode = true;
swipeDismissList.pause();
return true;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
int itemsSize = checkedItems.size();
switch (item.getItemId()) {
case R.id.menu_dismiss:
dismissFeeds(itemsSize);
break;
case R.id.menu_mark_as_read:
markFeedsAsRead(itemsSize);
break;
}
restartLoaderIfNecessary(itemsSize);
mode.finish();
return true;
}
private void dismissFeeds(int itemsSize) {
ArrayList<Feed> feeds = new ArrayList<Feed>();
for (int i = itemsSize - 1; i >= 0; i--) {
int position = checkedItems.keyAt(i);
Feed dismissedFeed = dismissFeedAndReturn(position);
feeds.add(dismissedFeed);
}
createUndoAction(feeds, R.string.undobar_message_deleted_selected, Action.DISMISSED);
}
private void markFeedsAsRead(int itemsSize) {
ArrayList<Long> feedsIDs = new ArrayList<Long>();
for (int i = itemsSize - 1; i >= 0; i--) {
int position = checkedItems.keyAt(i);
Feed readFeed = markFeedAsReadAndReturn(position);
feedsIDs.add(readFeed.ID());
}
createUndoAction(feedsIDs, R.string.undobar_message_read_selected, Action.READ);
}
private void createUndoAction(ArrayList<? extends Serializable> feedsIDs, int messageId, Action actionType) {
UndoableCollection undoableAction = new UndoableCollection(feedsIDs, actionType);
undoBarController.showUndoBar(undoableAction, messageId);
}
private void restartLoaderIfNecessary(int itemsSize) {
if (itemsWillChange(itemsSize)) {
restartLoader();
}
}
private boolean itemsWillChange(int itemsSize) {
return itemsSize != 0;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
isInActionMode = false;
swipeDismissList.resume();
uncolorAndClearAllItems();
}
}
private void uncolorAndClearAllItems() {
int size = checkedItems.size();
for (int i = size - 1; i >= 0; i--) {
int position = checkedItems.keyAt(i);
colorItem(position, false);
}
checkedItems.clear();
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
if (isInActionMode) {
checkItem(position, v);
clearCheckedItemsIfNoSelection();
}
}
private void clearCheckedItemsIfNoSelection() {
if (noItemSelected()) {
checkedItems.clear();
actionMode.finish();
}
}
private boolean noItemSelected() {
return checkedItems.size() == 0;
}
SimpleCursorAdapter
class FeedCursorAdapter(context: Context, cursor: Cursor)
extends SimpleCursorAdapter(
context,
R.layout.list_item,
cursor,
Array(C_TITLE, C_SITE, C_ADDED_DATE, C_IMAGE),
Array(R.id.textViewFeedTitle, R.id.textViewChannelSite, R.id.textViewFeedDate, R.id.imageViewFeedImage),
0) {
setViewBinder(new FeedCursorViewBinder(context))
}
ViewBinder
class FeedCursorViewBinder(context: Context) extends SimpleCursorAdapter.ViewBinder {
implicit def int2bool(int: Int) = if (int == 1) true else false
implicit def longDate2String(longDate: Long) = new Date(longDate).toLocaleString
private lazy val bitmapUtils = new BitmapUtils(context)
override def setViewValue(view: View, cursor: Cursor, columnIndex: Int) = {
/**
* Get columns indexes from cursor
*/
def getColumnIndex(columnName: String) = cursor.getColumnIndex(columnName)
val indexTitle = getColumnIndex(C_TITLE)
val indexRead = getColumnIndex(C_READ)
val indexDate = getColumnIndex(C_ADDED_DATE)
val indexImage = getColumnIndex(C_IMAGE)
val indexChannel = getColumnIndex(C_CHANNEL)
val indexSite = getColumnIndex(C_SITE)
def setTextAndColor(index: Int) = {
val text = cursor.getString(index)
val textView = view.asInstanceOf[TextView]
textView.setTextColor(getTextColor)
textView.setText(text)
true
}
def getTextColor = {
val isRead: Boolean = cursor.getInt(indexRead)
if (isRead) Color.GRAY
else Color.BLACK
}
columnIndex match {
case `indexTitle` | `indexSite` => setTextAndColor(columnIndex)
case `indexImage` => {
val imageId: Int = cursor.getInt(indexImage)
val imageFromFile = bitmapUtils.readBitmapForFeed(imageId)
val feedImage =
if (imageFromFile != null) imageFromFile
else BitmapFactory.decodeResource(context.getResources, imageId)
val imageViewFeedImage = view.asInstanceOf[ImageView]
imageViewFeedImage.setImageBitmap(feedImage)
true
}
case `indexDate` => {
val dateLong = cursor.getLong(indexDate)
val textViewFeedDate = view.asInstanceOf[TextView]
textViewFeedDate.setText(dateLong)
true
}
case _ => false
}
}
}
多分私は私の質問を正確にします：