src/com/android/contacts/list/MultiSelectContactsListFragment.java - platform/packages/apps/Contacts - Git at Google

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.contacts.list;

 import android.content.Context;
 import android.database.Cursor;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.provider.ContactsContract;
 import android.support.v4.view.ViewCompat;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.widget.AbsListView;
 import android.widget.ImageView;
 import android.widget.TextView;

 import com.android.contacts.R;
 import com.android.contacts.activities.ActionBarAdapter;
 import com.android.contacts.group.GroupMembersFragment;
 import com.android.contacts.list.MultiSelectEntryContactListAdapter.SelectedContactsListener;
 import com.android.contacts.logging.ListEvent.ActionType;
 import com.android.contacts.logging.Logger;
 import com.android.contacts.logging.SearchState;
 import com.android.contacts.model.AccountTypeManager;
 import com.android.contacts.model.account.AccountType;
 import com.android.contacts.model.account.AccountWithDataSet;
 import com.android.contacts.model.account.GoogleAccountType;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.TreeSet;

 /**
  * Fragment containing a contact list used for browsing contacts and optionally selecting
  * multiple contacts via checkboxes.
  */
 public abstract class MultiSelectContactsListFragment<T extends MultiSelectEntryContactListAdapter>
         extends ContactEntryListFragment<T>
         implements SelectedContactsListener {

     protected boolean mAnimateOnLoad;
     private static final String TAG = "MultiContactsList";

     public interface OnCheckBoxListActionListener {
         void onStartDisplayingCheckBoxes();
         void onSelectedContactIdsChanged();
         void onStopDisplayingCheckBoxes();
     }

     private static final String EXTRA_KEY_SELECTED_CONTACTS = "selected_contacts";

     private OnCheckBoxListActionListener mCheckBoxListListener;

     public void setCheckBoxListListener(OnCheckBoxListActionListener checkBoxListListener) {
         mCheckBoxListListener = checkBoxListListener;
     }

     public void setAnimateOnLoad(boolean shouldAnimate) {
         mAnimateOnLoad = shouldAnimate;
     }

     @Override
     public void onSelectedContactsChanged() {
         if (mCheckBoxListListener != null) mCheckBoxListListener.onSelectedContactIdsChanged();
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         super.onCreateView(inflater, container, savedInstanceState);
         if (savedInstanceState == null && mAnimateOnLoad) {
             setLayoutAnimation(getListView(), R.anim.slide_and_fade_in_layout_animation);
         }
         return getView();
     }

     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         if (savedInstanceState != null) {
             final TreeSet<Long> selectedContactIds = (TreeSet<Long>)
                     savedInstanceState.getSerializable(EXTRA_KEY_SELECTED_CONTACTS);
             getAdapter().setSelectedContactIds(selectedContactIds);
         }
     }

     @Override
     public void onStart() {
         super.onStart();
         if (mCheckBoxListListener != null) {
             mCheckBoxListListener.onSelectedContactIdsChanged();
         }
     }

     public TreeSet<Long> getSelectedContactIds() {
         return getAdapter().getSelectedContactIds();
     }

     public long[] getSelectedContactIdsArray() {
         return getAdapter().getSelectedContactIdsArray();
     }

     @Override
     protected void configureAdapter() {
         super.configureAdapter();
         getAdapter().setSelectedContactsListener(this);
     }

     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putSerializable(EXTRA_KEY_SELECTED_CONTACTS, getSelectedContactIds());
     }

     public void displayCheckBoxes(boolean displayCheckBoxes) {
         if (getAdapter() != null) {
             getAdapter().setDisplayCheckBoxes(displayCheckBoxes);
             if (!displayCheckBoxes) {
                 clearCheckBoxes();
             }
         }
     }

     public void clearCheckBoxes() {
         getAdapter().setSelectedContactIds(new TreeSet<Long>());
     }

     @Override
     protected boolean onItemLongClick(int position, long id) {
         final int previouslySelectedCount = getAdapter().getSelectedContactIds().size();
         final long contactId = getContactId(position);
         final int partition = getAdapter().getPartitionForPosition(position);
         if (contactId >= 0 && partition == ContactsContract.Directory.DEFAULT) {
             if (mCheckBoxListListener != null) {
                 mCheckBoxListListener.onStartDisplayingCheckBoxes();
             }
             getAdapter().toggleSelectionOfContactId(contactId);
             Logger.logListEvent(ActionType.SELECT, getListType(),
                     /* count */ getAdapter().getCount(), /* clickedIndex */ position,
                     /* numSelected */ 1);
             // Manually send clicked event if there is a checkbox.
             // See b/24098561. TalkBack will not read it otherwise.
             final int index = position + getListView().getHeaderViewsCount() - getListView()
                     .getFirstVisiblePosition();
             if (index >= 0 && index < getListView().getChildCount()) {
                 getListView().getChildAt(index).sendAccessibilityEvent(AccessibilityEvent
                         .TYPE_VIEW_CLICKED);
             }
         }
         final int nowSelectedCount = getAdapter().getSelectedContactIds().size();
         if (mCheckBoxListListener != null
                 && previouslySelectedCount != 0 && nowSelectedCount == 0) {
             // Last checkbox has been unchecked. So we should stop displaying checkboxes.
             mCheckBoxListListener.onStopDisplayingCheckBoxes();
         }
         return true;
     }

     @Override
     protected void onItemClick(int position, long id) {
         final long contactId = getContactId(position);
         if (contactId < 0) {
             return;
         }
         if (getAdapter().isDisplayingCheckBoxes()) {
             getAdapter().toggleSelectionOfContactId(contactId);
         }
         if (mCheckBoxListListener != null && getAdapter().getSelectedContactIds().size() == 0) {
             mCheckBoxListListener.onStopDisplayingCheckBoxes();
         }
     }

     private long getContactId(int position) {
         final int contactIdColumnIndex = getAdapter().getContactColumnIdIndex();

         final Cursor cursor = (Cursor) getAdapter().getItem(position);
         if (cursor != null) {
             if (cursor.getColumnCount() > contactIdColumnIndex) {
                 return cursor.getLong(contactIdColumnIndex);
             }
         }

         Log.w(TAG, "Failed to get contact ID from cursor column " + contactIdColumnIndex);
         return -1;
     }

     /**
      * Returns the state of the search results currently presented to the user.
      */
     public SearchState createSearchState() {
         return createSearchState(/* selectedPosition */ -1);
     }

     /**
      * Returns the state of the search results presented to the user
      * at the time the result in the given position was clicked.
      */
     public SearchState createSearchStateForSearchResultClick(int selectedPosition) {
         return createSearchState(selectedPosition);
     }

     private SearchState createSearchState(int selectedPosition) {
         final MultiSelectEntryContactListAdapter adapter = getAdapter();
         if (adapter == null) {
             return null;
         }
         final SearchState searchState = new SearchState();
         searchState.queryLength = adapter.getQueryString() == null
                 ? 0 : adapter.getQueryString().length();
         searchState.numPartitions = adapter.getPartitionCount();

         // Set the number of results displayed to the user.  Note that the adapter.getCount(),
         // value does not always match the number of results actually displayed to the user,
         // which is why we calculate it manually.
         final List<Integer> numResultsInEachPartition = new ArrayList<>();
         for (int i = 0; i < adapter.getPartitionCount(); i++) {
             final Cursor cursor = adapter.getCursor(i);
             if (cursor == null || cursor.isClosed()) {
                 // Something went wrong, abort.
                 numResultsInEachPartition.clear();
                 break;
             }
             numResultsInEachPartition.add(cursor.getCount());
         }
         if (!numResultsInEachPartition.isEmpty()) {
             int numResults = 0;
             for (int i = 0; i < numResultsInEachPartition.size(); i++) {
                 numResults += numResultsInEachPartition.get(i);
             }
             searchState.numResults = numResults;
         }

         // If a selection was made, set additional search state
         if (selectedPosition >= 0) {
             searchState.selectedPartition = adapter.getPartitionForPosition(selectedPosition);
             searchState.selectedIndexInPartition = adapter.getOffsetInPartition(selectedPosition);
             final Cursor cursor = adapter.getCursor(searchState.selectedPartition);
             searchState.numResultsInSelectedPartition =
                     cursor == null || cursor.isClosed() ? -1 : cursor.getCount();

             // Calculate the index across all partitions
             if (!numResultsInEachPartition.isEmpty()) {
                 int selectedIndex = 0;
                 for (int i = 0; i < searchState.selectedPartition; i++) {
                     selectedIndex += numResultsInEachPartition.get(i);
                 }
                 selectedIndex += searchState.selectedIndexInPartition;
                 searchState.selectedIndex = selectedIndex;
             }
         }
         return searchState;
     }

     protected void setLayoutAnimation(final ViewGroup view, int animationId) {
         if (view == null) {
             return;
         }
         view.setLayoutAnimationListener(new Animation.AnimationListener() {
             @Override
             public void onAnimationStart(Animation animation) {
             }

             @Override
             public void onAnimationEnd(Animation animation) {
                 view.setLayoutAnimation(null);
             }

             @Override
             public void onAnimationRepeat(Animation animation) {
             }
         });
         view.setLayoutAnimation(AnimationUtils.loadLayoutAnimation(getActivity(), animationId));
     }

     @Override
     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
             int totalItemCount) {
         final View accountFilterContainer = getView().findViewById(
                 R.id.account_filter_header_container);
         if (accountFilterContainer == null) {
             return;
         }

         int firstCompletelyVisibleItem = firstVisibleItem;
         if (view != null && view.getChildAt(0) != null && view.getChildAt(0).getTop() < 0) {
             firstCompletelyVisibleItem++;
         }

         if (firstCompletelyVisibleItem == 0) {
             ViewCompat.setElevation(accountFilterContainer, 0);
         } else {
             ViewCompat.setElevation(accountFilterContainer,
                     getResources().getDimension(R.dimen.contact_list_header_elevation));
         }
     }

     protected void bindListHeaderCustom(View listView, View accountFilterContainer) {
         bindListHeaderCommon(listView, accountFilterContainer);

         final TextView accountFilterHeader = (TextView) accountFilterContainer.findViewById(
                 R.id.account_filter_header);
         accountFilterHeader.setText(R.string.listCustomView);
         accountFilterHeader.setAllCaps(false);

         final ImageView accountFilterHeaderIcon = (ImageView) accountFilterContainer
                 .findViewById(R.id.account_filter_icon);
         accountFilterHeaderIcon.setVisibility(View.GONE);
     }

     /**
      * Show account icon, count of contacts and account name in the header of the list.
      */
     protected void bindListHeader(Context context, View listView, View accountFilterContainer,
             AccountWithDataSet accountWithDataSet, int memberCount) {
         if (memberCount < 0) {
             hideHeaderAndAddPadding(context, listView, accountFilterContainer);
             return;
         }

         bindListHeaderCommon(listView, accountFilterContainer);

         final AccountTypeManager accountTypeManager = AccountTypeManager.getInstance(context);
         final AccountType accountType = accountTypeManager.getAccountType(
                 accountWithDataSet.type, accountWithDataSet.dataSet);

         // Set text of count of contacts and account name
         final TextView accountFilterHeader = (TextView) accountFilterContainer.findViewById(
                 R.id.account_filter_header);
         final String headerText = shouldShowAccountName(accountType)
                 ? String.format(context.getResources().getQuantityString(
                         R.plurals.contacts_count_with_account, memberCount),
                                 memberCount, accountWithDataSet.name)
                 : context.getResources().getQuantityString(
                         R.plurals.contacts_count, memberCount, memberCount);
         accountFilterHeader.setText(headerText);
         accountFilterHeader.setAllCaps(false);

         // Set icon of the account
         final Drawable icon = accountType != null ? accountType.getDisplayIcon(context) : null;
         final ImageView accountFilterHeaderIcon = (ImageView) accountFilterContainer
                 .findViewById(R.id.account_filter_icon);

         // If it's a writable Google account, we set icon size as 24dp; otherwise, we set it as
         // 20dp. And we need to change margin accordingly. This is because the Google icon looks
         // smaller when the icons are of the same size.
         if (accountType instanceof GoogleAccountType) {
             accountFilterHeaderIcon.getLayoutParams().height = getResources()
                     .getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size);
             accountFilterHeaderIcon.getLayoutParams().width = getResources()
                     .getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size);

             setMargins(accountFilterHeaderIcon,
                     getResources().getDimensionPixelOffset(
                             R.dimen.contact_browser_list_header_icon_left_margin),
                     getResources().getDimensionPixelOffset(
                             R.dimen.contact_browser_list_header_icon_right_margin));
         } else {
             accountFilterHeaderIcon.getLayoutParams().height = getResources()
                     .getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size_alt);
             accountFilterHeaderIcon.getLayoutParams().width = getResources()
                     .getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size_alt);

             setMargins(accountFilterHeaderIcon,
                     getResources().getDimensionPixelOffset(
                             R.dimen.contact_browser_list_header_icon_left_margin_alt),
                     getResources().getDimensionPixelOffset(
                             R.dimen.contact_browser_list_header_icon_right_margin_alt));
         }
         accountFilterHeaderIcon.requestLayout();

         accountFilterHeaderIcon.setVisibility(View.VISIBLE);
         accountFilterHeaderIcon.setImageDrawable(icon);
     }

     private boolean shouldShowAccountName(AccountType accountType) {
         return (accountType.isGroupMembershipEditable() && this instanceof GroupMembersFragment)
                 || GoogleAccountType.ACCOUNT_TYPE.equals(accountType.accountType);
     }

     private void setMargins(View v, int l, int r) {
         if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
             ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
             p.setMarginStart(l);
             p.setMarginEnd(r);
             v.setLayoutParams(p);
             v.requestLayout();
         }
     }

     private void bindListHeaderCommon(View listView, View accountFilterContainer) {
         // Show header and remove top padding of the list
         accountFilterContainer.setVisibility(View.VISIBLE);
         setListViewPaddingTop(listView, /* paddingTop */ 0);
     }

     /**
      * Hide header of list view and add padding to the top of list view.
      */
     protected void hideHeaderAndAddPadding(Context context, View listView,
             View accountFilterContainer) {
         accountFilterContainer.setVisibility(View.GONE);
         setListViewPaddingTop(listView,
                 /* paddingTop */ context.getResources().getDimensionPixelSize(
                         R.dimen.contact_browser_list_item_padding_top_or_bottom));
     }

     private void setListViewPaddingTop(View listView, int paddingTop) {
         listView.setPadding(listView.getPaddingLeft(), paddingTop, listView.getPaddingRight(),
                 listView.getPaddingBottom());
     }

     /**
      * Returns the {@link ActionBarAdapter} object associated with list fragment.
      */
     public ActionBarAdapter getActionBarAdapter() {
         return null;
     }
 }
	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.contacts.list;

	import android.content.Context;
	import android.database.Cursor;
	import android.graphics.drawable.Drawable;
	import android.os.Bundle;
	import android.provider.ContactsContract;
	import android.support.v4.view.ViewCompat;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.accessibility.AccessibilityEvent;
	import android.view.animation.Animation;
	import android.view.animation.AnimationUtils;
	import android.widget.AbsListView;
	import android.widget.ImageView;
	import android.widget.TextView;

	import com.android.contacts.R;
	import com.android.contacts.activities.ActionBarAdapter;
	import com.android.contacts.group.GroupMembersFragment;
	import com.android.contacts.list.MultiSelectEntryContactListAdapter.SelectedContactsListener;
	import com.android.contacts.logging.ListEvent.ActionType;
	import com.android.contacts.logging.Logger;
	import com.android.contacts.logging.SearchState;
	import com.android.contacts.model.AccountTypeManager;
	import com.android.contacts.model.account.AccountType;
	import com.android.contacts.model.account.AccountWithDataSet;
	import com.android.contacts.model.account.GoogleAccountType;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.TreeSet;

	/**
	* Fragment containing a contact list used for browsing contacts and optionally selecting
	* multiple contacts via checkboxes.
	*/
	public abstract class MultiSelectContactsListFragment<T extends MultiSelectEntryContactListAdapter>
	extends ContactEntryListFragment<T>
	implements SelectedContactsListener {

	protected boolean mAnimateOnLoad;
	private static final String TAG = "MultiContactsList";

	public interface OnCheckBoxListActionListener {
	void onStartDisplayingCheckBoxes();
	void onSelectedContactIdsChanged();
	void onStopDisplayingCheckBoxes();
	}

	private static final String EXTRA_KEY_SELECTED_CONTACTS = "selected_contacts";

	private OnCheckBoxListActionListener mCheckBoxListListener;

	public void setCheckBoxListListener(OnCheckBoxListActionListener checkBoxListListener) {
	mCheckBoxListListener = checkBoxListListener;
	}

	public void setAnimateOnLoad(boolean shouldAnimate) {
	mAnimateOnLoad = shouldAnimate;
	}

	@Override
	public void onSelectedContactsChanged() {
	if (mCheckBoxListListener != null) mCheckBoxListListener.onSelectedContactIdsChanged();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	super.onCreateView(inflater, container, savedInstanceState);
	if (savedInstanceState == null && mAnimateOnLoad) {
	setLayoutAnimation(getListView(), R.anim.slide_and_fade_in_layout_animation);
	}
	return getView();
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);
	if (savedInstanceState != null) {
	final TreeSet<Long> selectedContactIds = (TreeSet<Long>)
	savedInstanceState.getSerializable(EXTRA_KEY_SELECTED_CONTACTS);
	getAdapter().setSelectedContactIds(selectedContactIds);
	}
	}

	@Override
	public void onStart() {
	super.onStart();
	if (mCheckBoxListListener != null) {
	mCheckBoxListListener.onSelectedContactIdsChanged();
	}
	}

	public TreeSet<Long> getSelectedContactIds() {
	return getAdapter().getSelectedContactIds();
	}

	public long[] getSelectedContactIdsArray() {
	return getAdapter().getSelectedContactIdsArray();
	}

	@Override
	protected void configureAdapter() {
	super.configureAdapter();
	getAdapter().setSelectedContactsListener(this);
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putSerializable(EXTRA_KEY_SELECTED_CONTACTS, getSelectedContactIds());
	}

	public void displayCheckBoxes(boolean displayCheckBoxes) {
	if (getAdapter() != null) {
	getAdapter().setDisplayCheckBoxes(displayCheckBoxes);
	if (!displayCheckBoxes) {
	clearCheckBoxes();
	}
	}
	}

	public void clearCheckBoxes() {
	getAdapter().setSelectedContactIds(new TreeSet<Long>());
	}

	@Override
	protected boolean onItemLongClick(int position, long id) {
	final int previouslySelectedCount = getAdapter().getSelectedContactIds().size();
	final long contactId = getContactId(position);
	final int partition = getAdapter().getPartitionForPosition(position);
	if (contactId >= 0 && partition == ContactsContract.Directory.DEFAULT) {
	if (mCheckBoxListListener != null) {
	mCheckBoxListListener.onStartDisplayingCheckBoxes();
	}
	getAdapter().toggleSelectionOfContactId(contactId);
	Logger.logListEvent(ActionType.SELECT, getListType(),
	/* count / getAdapter().getCount(), / clickedIndex */ position,
	/* numSelected */ 1);
	// Manually send clicked event if there is a checkbox.
	// See b/24098561. TalkBack will not read it otherwise.
	final int index = position + getListView().getHeaderViewsCount() - getListView()
	.getFirstVisiblePosition();
	if (index >= 0 && index < getListView().getChildCount()) {
	getListView().getChildAt(index).sendAccessibilityEvent(AccessibilityEvent
	.TYPE_VIEW_CLICKED);
	}
	}
	final int nowSelectedCount = getAdapter().getSelectedContactIds().size();
	if (mCheckBoxListListener != null
	&& previouslySelectedCount != 0 && nowSelectedCount == 0) {
	// Last checkbox has been unchecked. So we should stop displaying checkboxes.
	mCheckBoxListListener.onStopDisplayingCheckBoxes();
	}
	return true;
	}

	@Override
	protected void onItemClick(int position, long id) {
	final long contactId = getContactId(position);
	if (contactId < 0) {
	return;
	}
	if (getAdapter().isDisplayingCheckBoxes()) {
	getAdapter().toggleSelectionOfContactId(contactId);
	}
	if (mCheckBoxListListener != null && getAdapter().getSelectedContactIds().size() == 0) {
	mCheckBoxListListener.onStopDisplayingCheckBoxes();
	}
	}

	private long getContactId(int position) {
	final int contactIdColumnIndex = getAdapter().getContactColumnIdIndex();

	final Cursor cursor = (Cursor) getAdapter().getItem(position);
	if (cursor != null) {
	if (cursor.getColumnCount() > contactIdColumnIndex) {
	return cursor.getLong(contactIdColumnIndex);
	}
	}

	Log.w(TAG, "Failed to get contact ID from cursor column " + contactIdColumnIndex);
	return -1;
	}

	/**
	* Returns the state of the search results currently presented to the user.
	*/
	public SearchState createSearchState() {
	return createSearchState(/* selectedPosition */ -1);
	}

	/**
	* Returns the state of the search results presented to the user
	* at the time the result in the given position was clicked.
	*/
	public SearchState createSearchStateForSearchResultClick(int selectedPosition) {
	return createSearchState(selectedPosition);
	}

	private SearchState createSearchState(int selectedPosition) {
	final MultiSelectEntryContactListAdapter adapter = getAdapter();
	if (adapter == null) {
	return null;
	}
	final SearchState searchState = new SearchState();
	searchState.queryLength = adapter.getQueryString() == null
	? 0 : adapter.getQueryString().length();
	searchState.numPartitions = adapter.getPartitionCount();

	// Set the number of results displayed to the user. Note that the adapter.getCount(),
	// value does not always match the number of results actually displayed to the user,
	// which is why we calculate it manually.
	final List<Integer> numResultsInEachPartition = new ArrayList<>();
	for (int i = 0; i < adapter.getPartitionCount(); i++) {
	final Cursor cursor = adapter.getCursor(i);
	if (cursor == null \|\| cursor.isClosed()) {
	// Something went wrong, abort.
	numResultsInEachPartition.clear();
	break;
	}
	numResultsInEachPartition.add(cursor.getCount());
	}
	if (!numResultsInEachPartition.isEmpty()) {
	int numResults = 0;
	for (int i = 0; i < numResultsInEachPartition.size(); i++) {
	numResults += numResultsInEachPartition.get(i);
	}
	searchState.numResults = numResults;
	}

	// If a selection was made, set additional search state
	if (selectedPosition >= 0) {
	searchState.selectedPartition = adapter.getPartitionForPosition(selectedPosition);
	searchState.selectedIndexInPartition = adapter.getOffsetInPartition(selectedPosition);
	final Cursor cursor = adapter.getCursor(searchState.selectedPartition);
	searchState.numResultsInSelectedPartition =
	cursor == null \|\| cursor.isClosed() ? -1 : cursor.getCount();

	// Calculate the index across all partitions
	if (!numResultsInEachPartition.isEmpty()) {
	int selectedIndex = 0;
	for (int i = 0; i < searchState.selectedPartition; i++) {
	selectedIndex += numResultsInEachPartition.get(i);
	}
	selectedIndex += searchState.selectedIndexInPartition;
	searchState.selectedIndex = selectedIndex;
	}
	}
	return searchState;
	}

	protected void setLayoutAnimation(final ViewGroup view, int animationId) {
	if (view == null) {
	return;
	}
	view.setLayoutAnimationListener(new Animation.AnimationListener() {
	@Override
	public void onAnimationStart(Animation animation) {
	}

	@Override
	public void onAnimationEnd(Animation animation) {
	view.setLayoutAnimation(null);
	}

	@Override
	public void onAnimationRepeat(Animation animation) {
	}
	});
	view.setLayoutAnimation(AnimationUtils.loadLayoutAnimation(getActivity(), animationId));
	}

	@Override
	public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
	int totalItemCount) {
	final View accountFilterContainer = getView().findViewById(
	R.id.account_filter_header_container);
	if (accountFilterContainer == null) {
	return;
	}

	int firstCompletelyVisibleItem = firstVisibleItem;
	if (view != null && view.getChildAt(0) != null && view.getChildAt(0).getTop() < 0) {
	firstCompletelyVisibleItem++;
	}

	if (firstCompletelyVisibleItem == 0) {
	ViewCompat.setElevation(accountFilterContainer, 0);
	} else {
	ViewCompat.setElevation(accountFilterContainer,
	getResources().getDimension(R.dimen.contact_list_header_elevation));
	}
	}

	protected void bindListHeaderCustom(View listView, View accountFilterContainer) {
	bindListHeaderCommon(listView, accountFilterContainer);

	final TextView accountFilterHeader = (TextView) accountFilterContainer.findViewById(
	R.id.account_filter_header);
	accountFilterHeader.setText(R.string.listCustomView);
	accountFilterHeader.setAllCaps(false);

	final ImageView accountFilterHeaderIcon = (ImageView) accountFilterContainer
	.findViewById(R.id.account_filter_icon);
	accountFilterHeaderIcon.setVisibility(View.GONE);
	}

	/**
	* Show account icon, count of contacts and account name in the header of the list.
	*/
	protected void bindListHeader(Context context, View listView, View accountFilterContainer,
	AccountWithDataSet accountWithDataSet, int memberCount) {
	if (memberCount < 0) {
	hideHeaderAndAddPadding(context, listView, accountFilterContainer);
	return;
	}

	bindListHeaderCommon(listView, accountFilterContainer);

	final AccountTypeManager accountTypeManager = AccountTypeManager.getInstance(context);
	final AccountType accountType = accountTypeManager.getAccountType(
	accountWithDataSet.type, accountWithDataSet.dataSet);

	// Set text of count of contacts and account name
	final TextView accountFilterHeader = (TextView) accountFilterContainer.findViewById(
	R.id.account_filter_header);
	final String headerText = shouldShowAccountName(accountType)
	? String.format(context.getResources().getQuantityString(
	R.plurals.contacts_count_with_account, memberCount),
	memberCount, accountWithDataSet.name)
	: context.getResources().getQuantityString(
	R.plurals.contacts_count, memberCount, memberCount);
	accountFilterHeader.setText(headerText);
	accountFilterHeader.setAllCaps(false);

	// Set icon of the account
	final Drawable icon = accountType != null ? accountType.getDisplayIcon(context) : null;
	final ImageView accountFilterHeaderIcon = (ImageView) accountFilterContainer
	.findViewById(R.id.account_filter_icon);

	// If it's a writable Google account, we set icon size as 24dp; otherwise, we set it as
	// 20dp. And we need to change margin accordingly. This is because the Google icon looks
	// smaller when the icons are of the same size.
	if (accountType instanceof GoogleAccountType) {
	accountFilterHeaderIcon.getLayoutParams().height = getResources()
	.getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size);
	accountFilterHeaderIcon.getLayoutParams().width = getResources()
	.getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size);

	setMargins(accountFilterHeaderIcon,
	getResources().getDimensionPixelOffset(
	R.dimen.contact_browser_list_header_icon_left_margin),
	getResources().getDimensionPixelOffset(
	R.dimen.contact_browser_list_header_icon_right_margin));
	} else {
	accountFilterHeaderIcon.getLayoutParams().height = getResources()
	.getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size_alt);
	accountFilterHeaderIcon.getLayoutParams().width = getResources()
	.getDimensionPixelOffset(R.dimen.contact_browser_list_header_icon_size_alt);

	setMargins(accountFilterHeaderIcon,
	getResources().getDimensionPixelOffset(
	R.dimen.contact_browser_list_header_icon_left_margin_alt),
	getResources().getDimensionPixelOffset(
	R.dimen.contact_browser_list_header_icon_right_margin_alt));
	}
	accountFilterHeaderIcon.requestLayout();

	accountFilterHeaderIcon.setVisibility(View.VISIBLE);
	accountFilterHeaderIcon.setImageDrawable(icon);
	}

	private boolean shouldShowAccountName(AccountType accountType) {
	return (accountType.isGroupMembershipEditable() && this instanceof GroupMembersFragment)
	\|\| GoogleAccountType.ACCOUNT_TYPE.equals(accountType.accountType);
	}

	private void setMargins(View v, int l, int r) {
	if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
	ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
	p.setMarginStart(l);
	p.setMarginEnd(r);
	v.setLayoutParams(p);
	v.requestLayout();
	}
	}

	private void bindListHeaderCommon(View listView, View accountFilterContainer) {
	// Show header and remove top padding of the list
	accountFilterContainer.setVisibility(View.VISIBLE);
	setListViewPaddingTop(listView, /* paddingTop */ 0);
	}

	/**
	* Hide header of list view and add padding to the top of list view.
	*/
	protected void hideHeaderAndAddPadding(Context context, View listView,
	View accountFilterContainer) {
	accountFilterContainer.setVisibility(View.GONE);
	setListViewPaddingTop(listView,
	/* paddingTop */ context.getResources().getDimensionPixelSize(
	R.dimen.contact_browser_list_item_padding_top_or_bottom));
	}

	private void setListViewPaddingTop(View listView, int paddingTop) {
	listView.setPadding(listView.getPaddingLeft(), paddingTop, listView.getPaddingRight(),
	listView.getPaddingBottom());
	}

	/**
	* Returns the {@link ActionBarAdapter} object associated with list fragment.
	*/
	public ActionBarAdapter getActionBarAdapter() {
	return null;
	}
	}