Java Code Examples for android.widget.ListView#CHOICE_MODE_NONE

/**
 * {@inheritDoc}
 */
@Override
public void setAdapter( ListAdapter adapter ) {
	if ( adapter != null ) {
		mAdapterHasStableIds = mAdapter.hasStableIds();
		if ( mChoiceMode != ListView.CHOICE_MODE_NONE && mAdapterHasStableIds &&
				mCheckedIdStates == null ) {
			mCheckedIdStates = new LongSparseArray<Integer>();
		}
	}

	if ( mCheckStates != null ) {
		mCheckStates.clear();
	}

	if ( mCheckedIdStates != null ) {
		mCheckedIdStates.clear();
	}
}
 

/**
 * Returns the set of checked items ids. The result is only valid if the choice mode has not been set to
 * {@link #CHOICE_MODE_NONE} and the adapter has stable IDs. ({@link ListAdapter#hasStableIds()} == {@code true})
 * 
 * @return A new array which contains the id of each checked item in the list.
 */
public long[] getCheckedItemIds() {
	if ( mChoiceMode == ListView.CHOICE_MODE_NONE || mCheckedIdStates == null || mAdapter == null ) {
		return new long[0];
	}

	final LongSparseArray<Integer> idStates = mCheckedIdStates;
	final int count = idStates.size();
	final long[] ids = new long[count];

	for ( int i = 0; i < count; i++ ) {
		ids[i] = idStates.keyAt( i );
	}

	return ids;
}
 

/**
 * Change the list selection mode
 */
private void toggleChoiceMode() {
	clearSelection();

	final int currentMode = listView.getChoiceMode();
	switch (currentMode) {
		case ListView.CHOICE_MODE_NONE:
			listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
			Toast.makeText(this, "List choice mode: SINGLE", Toast.LENGTH_SHORT).show();
			break;
		case ListView.CHOICE_MODE_SINGLE:
			listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
			Toast.makeText(this, "List choice mode: MULTIPLE", Toast.LENGTH_SHORT).show();
			break;
		case ListView.CHOICE_MODE_MULTIPLE:
			listView.setChoiceMode(ListView.CHOICE_MODE_NONE);
			Toast.makeText(this, "List choice mode: NONE", Toast.LENGTH_SHORT).show();
			break;
	}
}
 

/**
 * Set the selected position of the list.
 * Only valid when {@link #isShowing()} == {@code true}.
 *
 * @param position List position to set as selected.
 */
public void setSelection(int position) {
    DropDownListView list = mDropDownList;
    if (isShowing() && list != null) {
        list.mListSelectionHidden = false;
        list.setSelection(position);
        if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) {
            list.setItemChecked(position, true);
        }
    }
}
 

/**
 * Returns the set of checked items ids. The result is only valid if the choice mode has not been set to
 * {@link #CHOICE_MODE_NONE}.
 * 
 * @return A new array which contains the id of each checked item in the list.
 * 
 * @deprecated Use {@link #getCheckedItemIds()} instead.
 */
@Deprecated
public long[] getCheckItemIds() {
	// Use new behavior that correctly handles stable ID mapping.
	if ( mAdapter != null && mAdapter.hasStableIds() ) {
		return getCheckedItemIds();
	}

	// Old behavior was buggy, but would sort of work for adapters without stable IDs.
	// Fall back to it to support legacy apps.
	if ( mChoiceMode != ListView.CHOICE_MODE_NONE && mCheckStates != null && mAdapter != null ) {
		final SparseBooleanArray states = mCheckStates;
		final int count = states.size();
		final long[] ids = new long[count];
		final ListAdapter adapter = mAdapter;

		int checkedCount = 0;
		for ( int i = 0; i < count; i++ ) {
			if ( states.valueAt( i ) ) {
				ids[checkedCount++] = adapter.getItemId( states.keyAt( i ) );
			}
		}

		// Trim array if needed. mCheckStates may contain false values
		// resulting in checkedCount being smaller than count.
		if ( checkedCount == count ) {
			return ids;
		} else {
			final long[] result = new long[checkedCount];
			System.arraycopy( ids, 0, result, 0, checkedCount );

			return result;
		}
	}
	return new long[0];
}
 

/**
 * Set the selected position of the list.
 * Only valid when {@link #isShowing()} == {@code true}.
 *
 * @param position List position to set as selected.
 */
public void setSelection(int position) {
    DropDownListView list = mDropDownList;
    if (isShowing() && list != null) {
        list.mListSelectionHidden = false;
        list.setSelection(position);
        if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) {
            list.setItemChecked(position, true);
        }
    }
}
 

/**
 * Set the selected position of the list.
 * Only valid when {@link #isShowing()} == {@code true}.
 *
 * @param position List position to set as selected.
 */
public void setSelection(int position) {
    DropDownListView list = mDropDownList;
    if (isShowing() && list != null) {
        list.mListSelectionHidden = false;
        list.setSelection(position);
        if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) {
            list.setItemChecked(position, true);
        }
    }
}
 

/**
 * Set the selected position of the list.
 * Only valid when {@link #isShowing()} == {@code true}.
 *
 * @param position List position to set as selected.
 */
public void setSelection(int position) {
    DropDownListView list = mDropDownList;
    if (isShowing() && list != null) {
        list.mListSelectionHidden = false;
        list.setSelection(position);
        if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) {
            list.setItemChecked(position, true);
        }
    }
}
 

/**
 * Detect SimpleType of a Widget
 * 
 * @param v Widget
 * @return
 */
public static String getSimpleType(View v, String type, boolean alreadyCalled)
{
	if (type.endsWith("null")) return NULL;
	if (type.endsWith("RadioButton")) return RADIO;
	if (type.endsWith("RadioGroup")) return RADIO_GROUP;
	if (type.endsWith("CheckBox") || type.endsWith("CheckedTextView")) return CHECKBOX;
	if (type.endsWith("ToggleButton")) return TOGGLE_BUTTON;
	if (type.endsWith("MenuDropDownListView") || type.endsWith("IconMenuView") || type.endsWith("ActionMenuView")) return MENU_VIEW;
	if (type.endsWith("ListMenuItemView") || type.endsWith("IconMenuItemView") || type.endsWith("ActionMenuItemView")) return MENU_ITEM;
	if (type.endsWith("DatePicker")) return DATE_PICKER;
	if (type.endsWith("TimePicker")) return TIME_PICKER;
	if (type.endsWith("DialogTitle")) return DIALOG_VIEW;
	if (type.endsWith("Button")) return BUTTON;
	if (type.endsWith("EditText")) return EDIT_TEXT;
	if (type.endsWith("SearchAutoComplete")) return SEARCH_BAR;
	if (type.endsWith("Spinner")) {
		Spinner s = (Spinner)v;
		if (s.getCount() == 0) return EMPTY_SPINNER;
		return SPINNER;
	}
	if (type.endsWith("SeekBar")) return SEEK_BAR;
	if (v instanceof RatingBar && (!((RatingBar)v).isIndicator())) return RATING_BAR;
	if (type.endsWith("TabHost")) return TAB_HOST;
	//if (type.endsWith("ExpandedMenuView") || type.endsWith("AlertController$RecycleListView")) { return EXPAND_MENU; }
	if (type.endsWith("ListView") || type.endsWith("ExpandedMenuView")) {
		ListView l = (ListView)v;
		if (l.getCount() == 0) return EMPTY_LIST;
		
		if (l.getAdapter().getClass().getName().endsWith("PreferenceGroupAdapter")) {
			return PREFERENCE_LIST;
		}
		
		switch (l.getChoiceMode()) {
			case ListView.CHOICE_MODE_NONE: return LIST_VIEW;
			case ListView.CHOICE_MODE_SINGLE: return SINGLE_CHOICE_LIST;
			case ListView.CHOICE_MODE_MULTIPLE: return MULTI_CHOICE_LIST;
		}
	}
	
	if (type.endsWith("AutoCompleteTextView")) return AUTOCOMPLETE_TEXTVIEW;
	if (type.endsWith("TextView")) return TEXT_VIEW;
	
	if (type.endsWith("ImageView")) return IMAGE_VIEW;
	if (type.endsWith("LinearLayout")) return LINEAR_LAYOUT;
	if (type.endsWith("RelativeLayout")) return RELATIVE_LAYOUT;
	if (type.endsWith("SlidingDrawer")) return SLIDING_DRAWER;
	if (type.endsWith("DrawerLayout")) return DRAWER_LAYOUT;
	
	if ((v instanceof WebView) || type.endsWith("WebView")) return WEB_VIEW;
	if (type.endsWith("TwoLineListItem")) return LIST_ITEM;
	if (type.endsWith("NumberPicker")) return NUMBER_PICKER;
	if (type.endsWith("NumberPickerButton")) return NUMBER_PICKER_BUTTON;
	
	String parentType = v.getClass().getSuperclass().getName();
	if (alreadyCalled == false && parentType != null) {
		System.out.print(">>>>>> " + parentType);
		return getSimpleType(v, parentType, true);
	}
	
	return "";
}
 

private void updateDisplayState() {
	final State state = getDisplayState(this);

       mDefaultColor = SettingsActivity.getPrimaryColor(getActivity());
       int accentColor = SettingsActivity.getAccentColor();
       if (mLastMode == state.derivedMode &&  mLastSortOrder == state.derivedSortOrder
               && mLastShowSize == state.showSize
               && mLastShowFolderSize == state.showFolderSize
			&& mLastShowThumbnail == state.showThumbnail
			&& mLastShowHiddenFiles == state.showHiddenFiles
               && (mLastShowColor != 0 && mLastShowColor == mDefaultColor)
               && (mLastShowAccentColor != 0 && mLastShowAccentColor == accentColor))
		return;
       boolean refreshData = mLastShowHiddenFiles != state.showHiddenFiles;
	mLastMode = state.derivedMode;
       mLastSortOrder = state.derivedSortOrder;
	mLastShowSize = state.showSize;
	mLastShowFolderSize = state.showFolderSize;
	mLastShowThumbnail = state.showThumbnail;
	mLastShowHiddenFiles = state.showHiddenFiles;

       mLastShowColor = mDefaultColor;
       mProgressBar.setColor(mLastShowColor);
	mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
	mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);

	final int choiceMode;
	if (state.allowMultiple) {
		choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
	} else {
		choiceMode = ListView.CHOICE_MODE_NONE;
	}

	final int thumbSize;
	if (state.derivedMode == MODE_GRID) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
		mListView.setAdapter(null);
		mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mGridView.setAdapter(mAdapter);
		mGridView.setColumnWidth(thumbSize);
		mGridView.setNumColumns(GridView.AUTO_FIT);
		mGridView.setChoiceMode(choiceMode);
		mCurrentView = mGridView;
	} else if (state.derivedMode == MODE_LIST) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
		mGridView.setAdapter(null);
		mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mListView.setAdapter(mAdapter);
		mListView.setChoiceMode(choiceMode);
		mCurrentView = mListView;
	} else {
		throw new IllegalStateException("Unknown state " + state.derivedMode);
	}

       ((BaseActivity) getActivity()).upadateActionItems(mCurrentView);
	mThumbSize = new Point(thumbSize, thumbSize);

       if(refreshData) {
           onUserSortOrderChanged();
       }
}
 

private void updateDisplayState() {
	final State state = getDisplayState(this);

       mDefaultColor = SettingsActivity.getPrimaryColor(getActivity());
       int accentColor = SettingsActivity.getAccentColor();
       if (mLastMode == state.derivedMode &&  mLastSortOrder == state.derivedSortOrder
               && mLastShowSize == state.showSize
               && mLastShowFolderSize == state.showFolderSize
			&& mLastShowThumbnail == state.showThumbnail
			&& mLastShowHiddenFiles == state.showHiddenFiles
               && (mLastShowColor != 0 && mLastShowColor == mDefaultColor)
               && (mLastShowAccentColor != 0 && mLastShowAccentColor == accentColor))
		return;
       boolean refreshData = mLastShowHiddenFiles != state.showHiddenFiles;
	mLastMode = state.derivedMode;
       mLastSortOrder = state.derivedSortOrder;
	mLastShowSize = state.showSize;
	mLastShowFolderSize = state.showFolderSize;
	mLastShowThumbnail = state.showThumbnail;
	mLastShowHiddenFiles = state.showHiddenFiles;

       mLastShowColor = mDefaultColor;
       mProgressBar.setColor(mLastShowColor);
	mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
	mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);

	final int choiceMode;
	if (state.allowMultiple) {
		choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
	} else {
		choiceMode = ListView.CHOICE_MODE_NONE;
	}

	final int thumbSize;
	if (state.derivedMode == MODE_GRID) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
		mListView.setAdapter(null);
		mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mGridView.setAdapter(mAdapter);
		mGridView.setColumnWidth(thumbSize);
		mGridView.setNumColumns(GridView.AUTO_FIT);
		mGridView.setChoiceMode(choiceMode);
		mCurrentView = mGridView;
	} else if (state.derivedMode == MODE_LIST) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
		mGridView.setAdapter(null);
		mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mListView.setAdapter(mAdapter);
		mListView.setChoiceMode(choiceMode);
		mCurrentView = mListView;
	} else {
		throw new IllegalStateException("Unknown state " + state.derivedMode);
	}

       ((BaseActivity) getActivity()).upadateActionItems(mCurrentView);
	mThumbSize = new Point(thumbSize, thumbSize);

       if(refreshData) {
           onUserSortOrderChanged();
       }
}
 

private void updateDisplayState() {
	final State state = getDisplayState(this);

       mDefaultColor = SettingsActivity.getPrimaryColor(getActivity());
       int accentColor = SettingsActivity.getAccentColor();
       if (mLastMode == state.derivedMode &&  mLastSortOrder == state.derivedSortOrder
               && mLastShowSize == state.showSize
               && mLastShowFolderSize == state.showFolderSize
			&& mLastShowThumbnail == state.showThumbnail
			&& mLastShowHiddenFiles == state.showHiddenFiles
               && (mLastShowColor != 0 && mLastShowColor == mDefaultColor)
               && (mLastShowAccentColor != 0 && mLastShowAccentColor == accentColor))
		return;
       boolean refreshData = mLastShowHiddenFiles != state.showHiddenFiles;
	mLastMode = state.derivedMode;
       mLastSortOrder = state.derivedSortOrder;
	mLastShowSize = state.showSize;
	mLastShowFolderSize = state.showFolderSize;
	mLastShowThumbnail = state.showThumbnail;
	mLastShowHiddenFiles = state.showHiddenFiles;

       mLastShowColor = mDefaultColor;
       mProgressBar.setColor(mLastShowColor);
	mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
	mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);

	final int choiceMode;
	if (state.allowMultiple) {
		choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
	} else {
		choiceMode = ListView.CHOICE_MODE_NONE;
	}

	final int thumbSize;
	if (state.derivedMode == MODE_GRID) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
		mListView.setAdapter(null);
		mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mGridView.setAdapter(mAdapter);
		mGridView.setColumnWidth(thumbSize);
		mGridView.setNumColumns(GridView.AUTO_FIT);
		mGridView.setChoiceMode(choiceMode);
		mCurrentView = mGridView;
	} else if (state.derivedMode == MODE_LIST) {
		thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
		mGridView.setAdapter(null);
		mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
		mListView.setAdapter(mAdapter);
		mListView.setChoiceMode(choiceMode);
		mCurrentView = mListView;
	} else {
		throw new IllegalStateException("Unknown state " + state.derivedMode);
	}

       ((BaseActivity) getActivity()).upadateActionItems(mCurrentView);
	mThumbSize = new Point(thumbSize, thumbSize);

       if(refreshData) {
           onUserSortOrderChanged();
       }
}
 

/**
 * Add a view as a child and make sure it is measured (if necessary) and positioned properly.
 * 
 * @param child
 *           The view to add
 * @param position
 *           The position of this child
 * @param x
 *           The x position relative to which this view will be positioned
 * @param flowDown
 *           If true, align left edge to x. If false, align right edge to x.
 * @param childrenTop
 *           Top edge where children should be positioned
 * @param selected
 *           Is this position selected?
 * @param recycled
 *           Has this view been pulled from the recycle bin? If so it does not need to be remeasured.
 */
private void setupChild( View child, int position, int x, boolean flowDown, int childrenTop, boolean selected, boolean recycled ) {
	final boolean isSelected = selected && shouldShowSelector();
	final boolean updateChildSelected = isSelected != child.isSelected();
	final int mode = mTouchMode;
	final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL && mMotionPosition == position;
	final boolean updateChildPressed = isPressed != child.isPressed();
	final boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested();

	// Respect layout params that are already in the view. Otherwise make some up...
	// noinspection unchecked
	AbsHListView.LayoutParams p = (AbsHListView.LayoutParams) child.getLayoutParams();
	if ( p == null ) {
		p = (AbsHListView.LayoutParams) generateDefaultLayoutParams();
	}
	p.viewType = mAdapter.getItemViewType( position );

	if ( ( recycled && !p.forceAdd ) || ( p.recycledHeaderFooter && p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER ) ) {
		attachViewToParent( child, flowDown ? -1 : 0, p );
	} else {
		p.forceAdd = false;
		if ( p.viewType == AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER ) {
			p.recycledHeaderFooter = true;
		}
		addViewInLayout( child, flowDown ? -1 : 0, p, true );
	}

	if ( updateChildSelected ) {
		child.setSelected( isSelected );
	}

	if ( updateChildPressed ) {
		child.setPressed( isPressed );
	}

	if ( mChoiceMode != ListView.CHOICE_MODE_NONE && mCheckStates != null ) {
		if ( child instanceof Checkable ) {
			( (Checkable) child ).setChecked( mCheckStates.get( position ) );
		} else if ( android.os.Build.VERSION.SDK_INT >= 11 ) {
			child.setActivated( mCheckStates.get( position ) );
		}
	}

	if ( needToMeasure ) {
		int childHeightSpec = ViewGroup.getChildMeasureSpec( mHeightMeasureSpec, mListPadding.top + mListPadding.bottom, p.height );
		int lpWidth = p.width;
		int childWidthSpec;
		if ( lpWidth > 0 ) {
			childWidthSpec = MeasureSpec.makeMeasureSpec( lpWidth, MeasureSpec.EXACTLY );
		} else {
			childWidthSpec = MeasureSpec.makeMeasureSpec( 0, MeasureSpec.UNSPECIFIED );
		}
		child.measure( childWidthSpec, childHeightSpec );
	} else {
		cleanupLayoutState( child );
	}

	final int w = child.getMeasuredWidth();
	final int h = child.getMeasuredHeight();
	final int childLeft = flowDown ? x : x - w;

	if ( needToMeasure ) {
		final int childBottom = childrenTop + h;
		final int childRight = childLeft + w;
		child.layout( childLeft, childrenTop, childRight, childBottom );
	} else {
		child.offsetLeftAndRight( childLeft - child.getLeft() );
		child.offsetTopAndBottom( childrenTop - child.getTop() );
	}

	if ( mCachingStarted && !child.isDrawingCacheEnabled() ) {
		child.setDrawingCacheEnabled( true );
	}

	if( android.os.Build.VERSION.SDK_INT >= 11 ) {
		if ( recycled && ( ( (AbsHListView.LayoutParams) child.getLayoutParams() ).scrappedFromPosition ) != position ) {
			child.jumpDrawablesToCurrentState();
		}
	}
}
 

/**
 * Sets the checked state of the specified position. The is only valid if the choice mode has been set to
 * {@link #CHOICE_MODE_SINGLE} or {@link #CHOICE_MODE_MULTIPLE}.
 * 
 * @param position
 *           The item whose checked state is to be checked
 * @param value
 *           The new checked state for the item
 */
public void setItemChecked( int position, boolean value ) {
	if ( mChoiceMode == ListView.CHOICE_MODE_NONE ) {
		return;
	}

	// Start selection mode if needed. We don't need to if we're unchecking something.
	if ( android.os.Build.VERSION.SDK_INT >= 11 ) {
		if ( value && mChoiceMode == ListView.CHOICE_MODE_MULTIPLE_MODAL && mChoiceActionMode == null ) {
			if ( mMultiChoiceModeCallback == null ||
					!((MultiChoiceModeWrapper)mMultiChoiceModeCallback).hasWrappedCallback() ) {
				throw new IllegalStateException( "AbsListView: attempted to start selection mode " +
						"for CHOICE_MODE_MULTIPLE_MODAL but no choice mode callback was " +
						"supplied. Call setMultiChoiceModeListener to set a callback." );
			}
			mChoiceActionMode = startActionMode( (MultiChoiceModeWrapper)mMultiChoiceModeCallback );
		}
	}

	if ( mChoiceMode == ListView.CHOICE_MODE_MULTIPLE
			|| ( android.os.Build.VERSION.SDK_INT >= 11 && mChoiceMode == ListView.CHOICE_MODE_MULTIPLE_MODAL ) ) {
		boolean oldValue = mCheckStates.get( position );
		mCheckStates.put( position, value );
		if ( mCheckedIdStates != null && mAdapter.hasStableIds() ) {
			if ( value ) {
				mCheckedIdStates.put( mAdapter.getItemId( position ), position );
			} else {
				mCheckedIdStates.delete( mAdapter.getItemId( position ) );
			}
		}
		if ( oldValue != value ) {
			if ( value ) {
				mCheckedItemCount++;
			} else {
				mCheckedItemCount--;
			}
		}
		if ( mChoiceActionMode != null ) {
			final long id = mAdapter.getItemId( position );
			((MultiChoiceModeWrapper)mMultiChoiceModeCallback).onItemCheckedStateChanged( (ActionMode) mChoiceActionMode, position, id, value );
		}
	} else {
		boolean updateIds = mCheckedIdStates != null && mAdapter.hasStableIds();
		// Clear all values if we're checking something, or unchecking the currently
		// selected item
		if ( value || isItemChecked( position ) ) {
			mCheckStates.clear();
			if ( updateIds ) {
				mCheckedIdStates.clear();
			}
		}
		// this may end up selecting the value we just cleared but this way
		// we ensure length of mCheckStates is 1, a fact getCheckedItemPosition relies on
		if ( value ) {
			mCheckStates.put( position, true );
			if ( updateIds ) {
				mCheckedIdStates.put( mAdapter.getItemId( position ), position );
			}
			mCheckedItemCount = 1;
		} else if ( mCheckStates.size() == 0 || !mCheckStates.valueAt( 0 ) ) {
			mCheckedItemCount = 0;
		}
	}

	// Do not generate a data change while we are in the layout phase
	if ( !mInLayout && !mBlockLayoutRequests ) {
		mDataChanged = true;
		rememberSyncState();
		requestLayout();
	}
}
 

/**
 * Returns the checked state of the specified position. The result is only valid if the choice mode has been set to
 * {@link #CHOICE_MODE_SINGLE} or {@link #CHOICE_MODE_MULTIPLE}.
 * 
 * @param position
 *           The item whose checked state to return
 * @return The item's checked state or <code>false</code> if choice mode is invalid
 * 
 * @see #setChoiceMode(int)
 */
public boolean isItemChecked( int position ) {
	if ( mChoiceMode != ListView.CHOICE_MODE_NONE && mCheckStates != null ) {
		return mCheckStates.get( position );
	}

	return false;
}
 

/**
 * Returns the set of checked items in the list. The result is only valid if the choice mode has not been set to
 * {@link #CHOICE_MODE_NONE}.
 * 
 * @return A SparseBooleanArray which will return true for each call to get(int position) where position is a position in the
 *         list, or <code>null</code> if the choice mode is set to {@link #CHOICE_MODE_NONE}.
 */
public SparseBooleanArray getCheckedItemPositions() {
	if ( mChoiceMode != ListView.CHOICE_MODE_NONE ) {
		return mCheckStates;
	}
	return null;
}