src/com/android/contacts/drawer/DrawerAdapter.java - platform/packages/apps/Contacts - Git at Google

 /*
  * Copyright (C) 2017 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.drawer;

 import android.app.Activity;
 import android.graphics.PorterDuff;
 import android.support.annotation.LayoutRes;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.BaseAdapter;
 import android.widget.ImageView;
 import android.widget.TextView;

 import com.android.contacts.R;
 import com.android.contacts.activities.PeopleActivity.ContactsView;
 import com.android.contacts.group.GroupListItem;
 import com.android.contacts.list.ContactListFilter;
 import com.android.contacts.model.account.AccountDisplayInfo;
 import com.android.contacts.model.account.AccountDisplayInfoFactory;
 import com.android.contacts.util.SharedPreferenceUtil;
 import com.android.contactsbind.HelpUtils;
 import com.android.contactsbind.ObjectFactory;

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

 public class DrawerAdapter extends BaseAdapter {

     private static final int VIEW_TYPE_PRIMARY_ITEM = 0;
     private static final int VIEW_TYPE_MISC_ITEM = 1;
     private static final int VIEW_TYPE_HEADER_ITEM = 2;
     private static final int VIEW_TYPE_GROUP_ENTRY = 3;
     private static final int VIEW_TYPE_ACCOUNT_ENTRY = 4;
     private static final int VIEW_TYPE_CREATE_LABEL = 5;
     private static final int VIEW_TYPE_NAV_SPACER = 6;
     private static final int VIEW_TYPE_NAV_DIVIDER = 7;

     // This count must be updated if we add more view types.
     private static final int VIEW_TYPE_COUNT = 9;

     private static final int TYPEFACE_STYLE_ACTIVATE = R.style.DrawerItemTextActiveStyle;
     private static final int TYPEFACE_STYLE_INACTIVE = R.style.DrawerItemTextInactiveStyle;

     private final Activity mActivity;
     private final LayoutInflater mInflater;
     private ContactsView mSelectedView;
     private boolean mAreGroupWritableAccountsAvailable;

     // The group/account that was last clicked.
     private long mSelectedGroupId;
     private ContactListFilter mSelectedAccount;

     // Adapter elements, ordered in this way mItemsList. The ordering is based on:
     //  [Navigation spacer item]
     //  [Primary items] (Contacts, Suggestions)
     //  [Group Header]
     //  [Groups]
     //  [Create Label button]
     //  [Account Header]
     //  [Accounts]
     //  [Misc items] (a divider, Settings, Help & Feedback)
     //  [Navigation spacer item]
     private NavSpacerItem mNavSpacerItem = null;
     private List<PrimaryItem> mPrimaryItems = new ArrayList<>();
     private HeaderItem mGroupHeader = null;
     private List<GroupEntryItem> mGroupEntries = new ArrayList<>();
     private BaseDrawerItem mCreateLabelButton = null;
     private HeaderItem mAccountHeader = null;
     private List<AccountEntryItem> mAccountEntries = new ArrayList<>();
     private List<BaseDrawerItem> mMiscItems = new ArrayList<>();

     private List<BaseDrawerItem> mItemsList = new ArrayList<>();
     private AccountDisplayInfoFactory mAccountDisplayFactory;

     public DrawerAdapter(Activity activity) {
         super();
         mInflater = LayoutInflater.from(activity);
         mActivity = activity;
         initializeDrawerMenuItems();
     }

     private void initializeDrawerMenuItems() {
         // Spacer item for dividing sections in drawer
         mNavSpacerItem = new NavSpacerItem(R.id.nav_drawer_spacer);
         // Primary items
         mPrimaryItems.add(new PrimaryItem(R.id.nav_all_contacts, R.string.contactsList,
                 R.drawable.quantum_ic_account_circle_vd_theme_24, ContactsView.ALL_CONTACTS));
         if (ObjectFactory.getAssistantFragment() != null) {
             mPrimaryItems.add(new PrimaryItem(R.id.nav_assistant, R.string.menu_assistant,
                     R.drawable.quantum_ic_assistant_vd_theme_24, ContactsView.ASSISTANT));
         }
         // Group Header
         mGroupHeader = new HeaderItem(R.id.nav_groups, R.string.menu_title_groups);
         // Account Header
         mAccountHeader = new HeaderItem(R.id.nav_filters, R.string.menu_title_filters);
         // Create Label Button
         mCreateLabelButton = new BaseDrawerItem(VIEW_TYPE_CREATE_LABEL, R.id.nav_create_label,
                 R.string.menu_new_group_action_bar, R.drawable.quantum_ic_add_vd_theme_24);
         // Misc Items
         mMiscItems.add(new DividerItem());
         mMiscItems.add(new MiscItem(R.id.nav_settings, R.string.menu_settings,
                 R.drawable.quantum_ic_settings_vd_theme_24));
         if (HelpUtils.isHelpAndFeedbackAvailable()) {
             mMiscItems.add(new MiscItem(R.id.nav_help, R.string.menu_help,
                     R.drawable.quantum_ic_help_vd_theme_24));
         }
         rebuildItemsList();
     }

     private void rebuildItemsList() {
         mItemsList.clear();
         mItemsList.add(mNavSpacerItem);
         mItemsList.addAll(mPrimaryItems);
         if (mAreGroupWritableAccountsAvailable || !mGroupEntries.isEmpty()) {
             mItemsList.add(mGroupHeader);
         }
         mItemsList.addAll(mGroupEntries);
         if (mAreGroupWritableAccountsAvailable) {
             mItemsList.add(mCreateLabelButton);
         }
         if (mAccountEntries.size() > 0) {
             mItemsList.add(mAccountHeader);
         }
         mItemsList.addAll(mAccountEntries);
         mItemsList.addAll(mMiscItems);
         mItemsList.add(mNavSpacerItem);
     }

     public void setGroups(List<GroupListItem> groupListItems, boolean areGroupWritable) {
         final ArrayList<GroupEntryItem> groupEntries = new ArrayList<GroupEntryItem>();
         for (GroupListItem group : groupListItems) {
             groupEntries.add(new GroupEntryItem(R.id.nav_group, group));
         }
         mGroupEntries.clear();
         mGroupEntries.addAll(groupEntries);
         mAreGroupWritableAccountsAvailable = areGroupWritable;
         notifyChangeAndRebuildList();
     }

     public void setAccounts(List<ContactListFilter> accountFilterItems) {
         ArrayList<AccountEntryItem> accountItems = new ArrayList<AccountEntryItem>();
         for (ContactListFilter filter : accountFilterItems) {
             accountItems.add(new AccountEntryItem(R.id.nav_filter, filter));
         }
         mAccountDisplayFactory = AccountDisplayInfoFactory.fromListFilters(mActivity,
                 accountFilterItems);
         mAccountEntries.clear();
         mAccountEntries.addAll(accountItems);
         // TODO investigate performance of calling notifyDataSetChanged
         notifyChangeAndRebuildList();
     }

     @Override
     public int getCount() {
         return  mItemsList.size();
     }

     public BaseDrawerItem getItem(int position) {
         return mItemsList.get(position);
     }

     @Override
     public long getItemId(int position) {
         return getItem(position).id;
     }

     @Override
     public int getViewTypeCount() {
         return VIEW_TYPE_COUNT;
     }

     @Override
     public View getView(int position, View view, ViewGroup viewGroup) {
         final BaseDrawerItem drawerItem = getItem(position);
         switch (drawerItem.viewType) {
             case VIEW_TYPE_PRIMARY_ITEM:
                 return getPrimaryItemView((PrimaryItem) drawerItem, view, viewGroup);
             case VIEW_TYPE_HEADER_ITEM:
                 return getHeaderItemView((HeaderItem) drawerItem, view, viewGroup);
             case VIEW_TYPE_CREATE_LABEL:
                 return getDrawerItemView(drawerItem, view, viewGroup);
             case VIEW_TYPE_GROUP_ENTRY:
                 return getGroupEntryView((GroupEntryItem) drawerItem, view, viewGroup);
             case VIEW_TYPE_ACCOUNT_ENTRY:
                 return getAccountItemView((AccountEntryItem) drawerItem, view, viewGroup);
             case VIEW_TYPE_MISC_ITEM:
                 return getDrawerItemView(drawerItem, view, viewGroup);
             case VIEW_TYPE_NAV_SPACER:
                 return getBaseItemView(R.layout.nav_drawer_spacer, view, viewGroup);
             case VIEW_TYPE_NAV_DIVIDER:
                 return getBaseItemView(R.layout.drawer_horizontal_divider, view, viewGroup);
         }
         throw new IllegalStateException("Unknown drawer item " + drawerItem);
     }

     private View getBaseItemView(@LayoutRes int layoutResID, View result,ViewGroup parent) {
         if (result == null) {
             result = mInflater.inflate(layoutResID, parent, false);
         }
         return result;
     }

     private View getPrimaryItemView(PrimaryItem item, View result, ViewGroup parent) {
         if (result == null) {
             result = mInflater.inflate(R.layout.drawer_primary_item, parent, false);
         }
         final TextView titleView = (TextView) result.findViewById(R.id.title);
         titleView.setText(item.text);
         final ImageView iconView = (ImageView) result.findViewById(R.id.icon);
         iconView.setImageResource(item.icon);
         final TextView newBadge = (TextView) result.findViewById(R.id.assistant_new_badge);
         final boolean showWelcomeBadge = !SharedPreferenceUtil.isWelcomeCardDismissed(mActivity);
         newBadge.setVisibility(item.contactsView == ContactsView.ASSISTANT && showWelcomeBadge
                 ? View.VISIBLE : View.GONE);
         result.setActivated(item.contactsView == mSelectedView);
         updateSelectedStatus(titleView, iconView, item.contactsView == mSelectedView);
         result.setId(item.id);
         return result;
     }

     private View getHeaderItemView(HeaderItem item, View result, ViewGroup parent) {
         if (result == null) {
             result = mInflater.inflate(R.layout.drawer_header, parent, false);
         }
         final TextView textView = (TextView) result.findViewById(R.id.title);
         textView.setText(item.text);
         result.setId(item.id);
         return result;
     }

     private View getGroupEntryView(GroupEntryItem item, View result, ViewGroup parent) {
         if (result == null || !(result.getTag() instanceof GroupEntryItem)) {
             result = mInflater.inflate(R.layout.drawer_item, parent, false);
             result.setId(item.id);
         }

         final GroupListItem groupListItem = item.group;
         final TextView title = (TextView) result.findViewById(R.id.title);
         title.setText(groupListItem.getTitle());
         final ImageView icon = (ImageView) result.findViewById(R.id.icon);
         icon.setImageResource(R.drawable.quantum_ic_label_vd_theme_24);
         final boolean activated = groupListItem.getGroupId() == mSelectedGroupId &&
                 mSelectedView == ContactsView.GROUP_VIEW;
         updateSelectedStatus(title, icon, activated);
         result.setActivated(activated);

         result.setTag(groupListItem);
         result.setContentDescription(
                 mActivity.getString(R.string.navigation_drawer_label, groupListItem.getTitle()));
         return result;
     }

     private View getAccountItemView(AccountEntryItem item, View result, ViewGroup parent) {
         if (result == null || !(result.getTag() instanceof ContactListFilter)) {
             result = mInflater.inflate(R.layout.drawer_item, parent, false);
             result.setId(item.id);
         }
         final ContactListFilter account = item.account;
         final TextView textView = ((TextView) result.findViewById(R.id.title));
         textView.setText(account.accountName);
         final boolean activated = account.equals(mSelectedAccount)
                 && mSelectedView == ContactsView.ACCOUNT_VIEW;
         textView.setTextAppearance(mActivity, activated
                 ? TYPEFACE_STYLE_ACTIVATE : TYPEFACE_STYLE_INACTIVE);

         final ImageView icon = (ImageView) result.findViewById(R.id.icon);
         final AccountDisplayInfo displayableAccount =
                 mAccountDisplayFactory.getAccountDisplayInfoFor(item.account);
         icon.setScaleType(ImageView.ScaleType.FIT_CENTER);
         icon.setImageDrawable(displayableAccount.getIcon());

         result.setTag(account);
         result.setActivated(activated);
         result.setContentDescription(
                 displayableAccount.getTypeLabel() + " " + item.account.accountName);
         return result;
     }

     private View getDrawerItemView(BaseDrawerItem item, View result, ViewGroup parent) {
         if (result == null) {
             result = mInflater.inflate(R.layout.drawer_item, parent, false);
         }

         final TextView textView = (TextView) result.findViewById(R.id.title);
         textView.setText(item.text);
         final ImageView iconView = (ImageView) result.findViewById(R.id.icon);
         iconView.setImageResource(item.icon);
         result.setId(item.id);
         updateSelectedStatus(textView, iconView, false);
         return result;
     }

     @Override
     public int getItemViewType(int position) {
         return getItem(position).viewType;
     }

     private void updateSelectedStatus(TextView textView, ImageView imageView, boolean activated) {
         textView.setTextAppearance(mActivity, activated
                 ? TYPEFACE_STYLE_ACTIVATE : TYPEFACE_STYLE_INACTIVE);
         if (activated) {
             imageView.setColorFilter(mActivity.getResources().getColor(R.color.primary_color),
                     PorterDuff.Mode.SRC_ATOP);
         } else {
             imageView.clearColorFilter();
         }
     }

     private void notifyChangeAndRebuildList() {
         rebuildItemsList();
         notifyDataSetChanged();
     }

     public void setSelectedContactsView(ContactsView contactsView) {
         if (mSelectedView == contactsView) {
             return;
         }
         mSelectedView = contactsView;
         notifyChangeAndRebuildList();
     }


     public void setSelectedGroupId(long groupId) {
         if (mSelectedGroupId == groupId) {
             return;
         }
         mSelectedGroupId = groupId;
         notifyChangeAndRebuildList();
     }

     public long getSelectedGroupId() {
         return mSelectedGroupId;
     }

     public void setSelectedAccount(ContactListFilter filter) {
         if (mSelectedAccount == filter) {
             return;
         }
         mSelectedAccount = filter;
         notifyChangeAndRebuildList();
     }

     public ContactListFilter getSelectedAccount() {
         return mSelectedAccount;
     }

     public static class BaseDrawerItem {
         public final int viewType;
         public final int id;
         public final int text;
         public final int icon;

         public BaseDrawerItem(int adapterViewType, int viewId, int textResId, int iconResId) {
             viewType = adapterViewType;
             id = viewId;
             text = textResId;
             icon = iconResId;
         }
     }

     // Navigation drawer item for Contacts or Suggestions view which contains a name, an icon and
     // contacts view.
     public static class PrimaryItem extends BaseDrawerItem {
         public final ContactsView contactsView;

         public PrimaryItem(int id, int pageName, int iconId, ContactsView contactsView) {
             super(VIEW_TYPE_PRIMARY_ITEM, id, pageName, iconId);
             this.contactsView = contactsView;
         }
     }

     // Navigation drawer item for Settings, help and feedback, etc.
     public static class MiscItem extends BaseDrawerItem {
         public MiscItem(int id, int textId, int iconId) {
             super(VIEW_TYPE_MISC_ITEM, id, textId, iconId);
         }
     }

     // Header for a list of sub-items in the drawer.
     public static class HeaderItem extends BaseDrawerItem {
         public HeaderItem(int id, int textId) {
             super(VIEW_TYPE_HEADER_ITEM, id, textId, /* iconResId */ 0);
         }
     }

     // Navigation drawer item for spacer item for dividing sections in the drawer.
     public static class NavSpacerItem extends BaseDrawerItem {
         public NavSpacerItem(int id) {
             super(VIEW_TYPE_NAV_SPACER, id, /* textResId */ 0, /* iconResId */ 0);
         }
     }

     // Divider for drawing a line between sections in the drawer.
     public static class DividerItem extends BaseDrawerItem {
         public DividerItem() {
             super(VIEW_TYPE_NAV_DIVIDER, /* id */ 0, /* textResId */ 0, /* iconResId */ 0);
         }
     }

     // Navigation drawer item for a group.
     public static class GroupEntryItem extends BaseDrawerItem {
         private final GroupListItem group;

         public GroupEntryItem(int id, GroupListItem group) {
             super(VIEW_TYPE_GROUP_ENTRY, id, /* textResId */ 0, /* iconResId */ 0);
             this.group = group;
         }
     }

     // Navigation drawer item for an account.
     public static class AccountEntryItem extends BaseDrawerItem {
         private final ContactListFilter account;

         public AccountEntryItem(int id, ContactListFilter account) {
             super(VIEW_TYPE_ACCOUNT_ENTRY, id, /* textResId */ 0, /* iconResId */ 0);
             this.account = account;
         }
     }
 }
	/*
	* Copyright (C) 2017 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.drawer;

	import android.app.Activity;
	import android.graphics.PorterDuff;
	import android.support.annotation.LayoutRes;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.BaseAdapter;
	import android.widget.ImageView;
	import android.widget.TextView;

	import com.android.contacts.R;
	import com.android.contacts.activities.PeopleActivity.ContactsView;
	import com.android.contacts.group.GroupListItem;
	import com.android.contacts.list.ContactListFilter;
	import com.android.contacts.model.account.AccountDisplayInfo;
	import com.android.contacts.model.account.AccountDisplayInfoFactory;
	import com.android.contacts.util.SharedPreferenceUtil;
	import com.android.contactsbind.HelpUtils;
	import com.android.contactsbind.ObjectFactory;

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

	public class DrawerAdapter extends BaseAdapter {

	private static final int VIEW_TYPE_PRIMARY_ITEM = 0;
	private static final int VIEW_TYPE_MISC_ITEM = 1;
	private static final int VIEW_TYPE_HEADER_ITEM = 2;
	private static final int VIEW_TYPE_GROUP_ENTRY = 3;
	private static final int VIEW_TYPE_ACCOUNT_ENTRY = 4;
	private static final int VIEW_TYPE_CREATE_LABEL = 5;
	private static final int VIEW_TYPE_NAV_SPACER = 6;
	private static final int VIEW_TYPE_NAV_DIVIDER = 7;

	// This count must be updated if we add more view types.
	private static final int VIEW_TYPE_COUNT = 9;

	private static final int TYPEFACE_STYLE_ACTIVATE = R.style.DrawerItemTextActiveStyle;
	private static final int TYPEFACE_STYLE_INACTIVE = R.style.DrawerItemTextInactiveStyle;

	private final Activity mActivity;
	private final LayoutInflater mInflater;
	private ContactsView mSelectedView;
	private boolean mAreGroupWritableAccountsAvailable;

	// The group/account that was last clicked.
	private long mSelectedGroupId;
	private ContactListFilter mSelectedAccount;

	// Adapter elements, ordered in this way mItemsList. The ordering is based on:
	// [Navigation spacer item]
	// [Primary items] (Contacts, Suggestions)
	// [Group Header]
	// [Groups]
	// [Create Label button]
	// [Account Header]
	// [Accounts]
	// [Misc items] (a divider, Settings, Help & Feedback)
	// [Navigation spacer item]
	private NavSpacerItem mNavSpacerItem = null;
	private List<PrimaryItem> mPrimaryItems = new ArrayList<>();
	private HeaderItem mGroupHeader = null;
	private List<GroupEntryItem> mGroupEntries = new ArrayList<>();
	private BaseDrawerItem mCreateLabelButton = null;
	private HeaderItem mAccountHeader = null;
	private List<AccountEntryItem> mAccountEntries = new ArrayList<>();
	private List<BaseDrawerItem> mMiscItems = new ArrayList<>();

	private List<BaseDrawerItem> mItemsList = new ArrayList<>();
	private AccountDisplayInfoFactory mAccountDisplayFactory;

	public DrawerAdapter(Activity activity) {
	super();
	mInflater = LayoutInflater.from(activity);
	mActivity = activity;
	initializeDrawerMenuItems();
	}

	private void initializeDrawerMenuItems() {
	// Spacer item for dividing sections in drawer
	mNavSpacerItem = new NavSpacerItem(R.id.nav_drawer_spacer);
	// Primary items
	mPrimaryItems.add(new PrimaryItem(R.id.nav_all_contacts, R.string.contactsList,
	R.drawable.quantum_ic_account_circle_vd_theme_24, ContactsView.ALL_CONTACTS));
	if (ObjectFactory.getAssistantFragment() != null) {
	mPrimaryItems.add(new PrimaryItem(R.id.nav_assistant, R.string.menu_assistant,
	R.drawable.quantum_ic_assistant_vd_theme_24, ContactsView.ASSISTANT));
	}
	// Group Header
	mGroupHeader = new HeaderItem(R.id.nav_groups, R.string.menu_title_groups);
	// Account Header
	mAccountHeader = new HeaderItem(R.id.nav_filters, R.string.menu_title_filters);
	// Create Label Button
	mCreateLabelButton = new BaseDrawerItem(VIEW_TYPE_CREATE_LABEL, R.id.nav_create_label,
	R.string.menu_new_group_action_bar, R.drawable.quantum_ic_add_vd_theme_24);
	// Misc Items
	mMiscItems.add(new DividerItem());
	mMiscItems.add(new MiscItem(R.id.nav_settings, R.string.menu_settings,
	R.drawable.quantum_ic_settings_vd_theme_24));
	if (HelpUtils.isHelpAndFeedbackAvailable()) {
	mMiscItems.add(new MiscItem(R.id.nav_help, R.string.menu_help,
	R.drawable.quantum_ic_help_vd_theme_24));
	}
	rebuildItemsList();
	}

	private void rebuildItemsList() {
	mItemsList.clear();
	mItemsList.add(mNavSpacerItem);
	mItemsList.addAll(mPrimaryItems);
	if (mAreGroupWritableAccountsAvailable \|\| !mGroupEntries.isEmpty()) {
	mItemsList.add(mGroupHeader);
	}
	mItemsList.addAll(mGroupEntries);
	if (mAreGroupWritableAccountsAvailable) {
	mItemsList.add(mCreateLabelButton);
	}
	if (mAccountEntries.size() > 0) {
	mItemsList.add(mAccountHeader);
	}
	mItemsList.addAll(mAccountEntries);
	mItemsList.addAll(mMiscItems);
	mItemsList.add(mNavSpacerItem);
	}

	public void setGroups(List<GroupListItem> groupListItems, boolean areGroupWritable) {
	final ArrayList<GroupEntryItem> groupEntries = new ArrayList<GroupEntryItem>();
	for (GroupListItem group : groupListItems) {
	groupEntries.add(new GroupEntryItem(R.id.nav_group, group));
	}
	mGroupEntries.clear();
	mGroupEntries.addAll(groupEntries);
	mAreGroupWritableAccountsAvailable = areGroupWritable;
	notifyChangeAndRebuildList();
	}

	public void setAccounts(List<ContactListFilter> accountFilterItems) {
	ArrayList<AccountEntryItem> accountItems = new ArrayList<AccountEntryItem>();
	for (ContactListFilter filter : accountFilterItems) {
	accountItems.add(new AccountEntryItem(R.id.nav_filter, filter));
	}
	mAccountDisplayFactory = AccountDisplayInfoFactory.fromListFilters(mActivity,
	accountFilterItems);
	mAccountEntries.clear();
	mAccountEntries.addAll(accountItems);
	// TODO investigate performance of calling notifyDataSetChanged
	notifyChangeAndRebuildList();
	}

	@Override
	public int getCount() {
	return mItemsList.size();
	}

	public BaseDrawerItem getItem(int position) {
	return mItemsList.get(position);
	}

	@Override
	public long getItemId(int position) {
	return getItem(position).id;
	}

	@Override
	public int getViewTypeCount() {
	return VIEW_TYPE_COUNT;
	}

	@Override
	public View getView(int position, View view, ViewGroup viewGroup) {
	final BaseDrawerItem drawerItem = getItem(position);
	switch (drawerItem.viewType) {
	case VIEW_TYPE_PRIMARY_ITEM:
	return getPrimaryItemView((PrimaryItem) drawerItem, view, viewGroup);
	case VIEW_TYPE_HEADER_ITEM:
	return getHeaderItemView((HeaderItem) drawerItem, view, viewGroup);
	case VIEW_TYPE_CREATE_LABEL:
	return getDrawerItemView(drawerItem, view, viewGroup);
	case VIEW_TYPE_GROUP_ENTRY:
	return getGroupEntryView((GroupEntryItem) drawerItem, view, viewGroup);
	case VIEW_TYPE_ACCOUNT_ENTRY:
	return getAccountItemView((AccountEntryItem) drawerItem, view, viewGroup);
	case VIEW_TYPE_MISC_ITEM:
	return getDrawerItemView(drawerItem, view, viewGroup);
	case VIEW_TYPE_NAV_SPACER:
	return getBaseItemView(R.layout.nav_drawer_spacer, view, viewGroup);
	case VIEW_TYPE_NAV_DIVIDER:
	return getBaseItemView(R.layout.drawer_horizontal_divider, view, viewGroup);
	}
	throw new IllegalStateException("Unknown drawer item " + drawerItem);
	}

	private View getBaseItemView(@LayoutRes int layoutResID, View result,ViewGroup parent) {
	if (result == null) {
	result = mInflater.inflate(layoutResID, parent, false);
	}
	return result;
	}

	private View getPrimaryItemView(PrimaryItem item, View result, ViewGroup parent) {
	if (result == null) {
	result = mInflater.inflate(R.layout.drawer_primary_item, parent, false);
	}
	final TextView titleView = (TextView) result.findViewById(R.id.title);
	titleView.setText(item.text);
	final ImageView iconView = (ImageView) result.findViewById(R.id.icon);
	iconView.setImageResource(item.icon);
	final TextView newBadge = (TextView) result.findViewById(R.id.assistant_new_badge);
	final boolean showWelcomeBadge = !SharedPreferenceUtil.isWelcomeCardDismissed(mActivity);
	newBadge.setVisibility(item.contactsView == ContactsView.ASSISTANT && showWelcomeBadge
	? View.VISIBLE : View.GONE);
	result.setActivated(item.contactsView == mSelectedView);
	updateSelectedStatus(titleView, iconView, item.contactsView == mSelectedView);
	result.setId(item.id);
	return result;
	}

	private View getHeaderItemView(HeaderItem item, View result, ViewGroup parent) {
	if (result == null) {
	result = mInflater.inflate(R.layout.drawer_header, parent, false);
	}
	final TextView textView = (TextView) result.findViewById(R.id.title);
	textView.setText(item.text);
	result.setId(item.id);
	return result;
	}

	private View getGroupEntryView(GroupEntryItem item, View result, ViewGroup parent) {
	if (result == null \|\| !(result.getTag() instanceof GroupEntryItem)) {
	result = mInflater.inflate(R.layout.drawer_item, parent, false);
	result.setId(item.id);
	}

	final GroupListItem groupListItem = item.group;
	final TextView title = (TextView) result.findViewById(R.id.title);
	title.setText(groupListItem.getTitle());
	final ImageView icon = (ImageView) result.findViewById(R.id.icon);
	icon.setImageResource(R.drawable.quantum_ic_label_vd_theme_24);
	final boolean activated = groupListItem.getGroupId() == mSelectedGroupId &&
	mSelectedView == ContactsView.GROUP_VIEW;
	updateSelectedStatus(title, icon, activated);
	result.setActivated(activated);

	result.setTag(groupListItem);
	result.setContentDescription(
	mActivity.getString(R.string.navigation_drawer_label, groupListItem.getTitle()));
	return result;
	}

	private View getAccountItemView(AccountEntryItem item, View result, ViewGroup parent) {
	if (result == null \|\| !(result.getTag() instanceof ContactListFilter)) {
	result = mInflater.inflate(R.layout.drawer_item, parent, false);
	result.setId(item.id);
	}
	final ContactListFilter account = item.account;
	final TextView textView = ((TextView) result.findViewById(R.id.title));
	textView.setText(account.accountName);
	final boolean activated = account.equals(mSelectedAccount)
	&& mSelectedView == ContactsView.ACCOUNT_VIEW;
	textView.setTextAppearance(mActivity, activated
	? TYPEFACE_STYLE_ACTIVATE : TYPEFACE_STYLE_INACTIVE);

	final ImageView icon = (ImageView) result.findViewById(R.id.icon);
	final AccountDisplayInfo displayableAccount =
	mAccountDisplayFactory.getAccountDisplayInfoFor(item.account);
	icon.setScaleType(ImageView.ScaleType.FIT_CENTER);
	icon.setImageDrawable(displayableAccount.getIcon());

	result.setTag(account);
	result.setActivated(activated);
	result.setContentDescription(
	displayableAccount.getTypeLabel() + " " + item.account.accountName);
	return result;
	}

	private View getDrawerItemView(BaseDrawerItem item, View result, ViewGroup parent) {
	if (result == null) {
	result = mInflater.inflate(R.layout.drawer_item, parent, false);
	}

	final TextView textView = (TextView) result.findViewById(R.id.title);
	textView.setText(item.text);
	final ImageView iconView = (ImageView) result.findViewById(R.id.icon);
	iconView.setImageResource(item.icon);
	result.setId(item.id);
	updateSelectedStatus(textView, iconView, false);
	return result;
	}

	@Override
	public int getItemViewType(int position) {
	return getItem(position).viewType;
	}

	private void updateSelectedStatus(TextView textView, ImageView imageView, boolean activated) {
	textView.setTextAppearance(mActivity, activated
	? TYPEFACE_STYLE_ACTIVATE : TYPEFACE_STYLE_INACTIVE);
	if (activated) {
	imageView.setColorFilter(mActivity.getResources().getColor(R.color.primary_color),
	PorterDuff.Mode.SRC_ATOP);
	} else {
	imageView.clearColorFilter();
	}
	}

	private void notifyChangeAndRebuildList() {
	rebuildItemsList();
	notifyDataSetChanged();
	}

	public void setSelectedContactsView(ContactsView contactsView) {
	if (mSelectedView == contactsView) {
	return;
	}
	mSelectedView = contactsView;
	notifyChangeAndRebuildList();
	}


	public void setSelectedGroupId(long groupId) {
	if (mSelectedGroupId == groupId) {
	return;
	}
	mSelectedGroupId = groupId;
	notifyChangeAndRebuildList();
	}

	public long getSelectedGroupId() {
	return mSelectedGroupId;
	}

	public void setSelectedAccount(ContactListFilter filter) {
	if (mSelectedAccount == filter) {
	return;
	}
	mSelectedAccount = filter;
	notifyChangeAndRebuildList();
	}

	public ContactListFilter getSelectedAccount() {
	return mSelectedAccount;
	}

	public static class BaseDrawerItem {
	public final int viewType;
	public final int id;
	public final int text;
	public final int icon;

	public BaseDrawerItem(int adapterViewType, int viewId, int textResId, int iconResId) {
	viewType = adapterViewType;
	id = viewId;
	text = textResId;
	icon = iconResId;
	}
	}

	// Navigation drawer item for Contacts or Suggestions view which contains a name, an icon and
	// contacts view.
	public static class PrimaryItem extends BaseDrawerItem {
	public final ContactsView contactsView;

	public PrimaryItem(int id, int pageName, int iconId, ContactsView contactsView) {
	super(VIEW_TYPE_PRIMARY_ITEM, id, pageName, iconId);
	this.contactsView = contactsView;
	}
	}

	// Navigation drawer item for Settings, help and feedback, etc.
	public static class MiscItem extends BaseDrawerItem {
	public MiscItem(int id, int textId, int iconId) {
	super(VIEW_TYPE_MISC_ITEM, id, textId, iconId);
	}
	}

	// Header for a list of sub-items in the drawer.
	public static class HeaderItem extends BaseDrawerItem {
	public HeaderItem(int id, int textId) {
	super(VIEW_TYPE_HEADER_ITEM, id, textId, /* iconResId */ 0);
	}
	}

	// Navigation drawer item for spacer item for dividing sections in the drawer.
	public static class NavSpacerItem extends BaseDrawerItem {
	public NavSpacerItem(int id) {
	super(VIEW_TYPE_NAV_SPACER, id, /* textResId / 0, / iconResId */ 0);
	}
	}

	// Divider for drawing a line between sections in the drawer.
	public static class DividerItem extends BaseDrawerItem {
	public DividerItem() {
	super(VIEW_TYPE_NAV_DIVIDER, /* id / 0, / textResId / 0, / iconResId */ 0);
	}
	}

	// Navigation drawer item for a group.
	public static class GroupEntryItem extends BaseDrawerItem {
	private final GroupListItem group;

	public GroupEntryItem(int id, GroupListItem group) {
	super(VIEW_TYPE_GROUP_ENTRY, id, /* textResId / 0, / iconResId */ 0);
	this.group = group;
	}
	}

	// Navigation drawer item for an account.
	public static class AccountEntryItem extends BaseDrawerItem {
	private final ContactListFilter account;

	public AccountEntryItem(int id, ContactListFilter account) {
	super(VIEW_TYPE_ACCOUNT_ENTRY, id, /* textResId / 0, / iconResId */ 0);
	this.account = account;
	}
	}
	}