src/com/android/contacts/drawer/DrawerFragment.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.app.Fragment;
 import android.app.LoaderManager;
 import android.content.CursorLoader;
 import android.content.Loader;
 import android.database.ContentObserver;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowInsets;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.FrameLayout;
 import android.widget.ListView;

 import com.android.contacts.GroupListLoader;
 import com.android.contacts.R;
 import com.android.contacts.activities.PeopleActivity.ContactsView;
 import com.android.contacts.group.GroupListItem;
 import com.android.contacts.group.GroupUtil;
 import com.android.contacts.list.ContactListFilter;
 import com.android.contacts.model.AccountTypeManager;
 import com.android.contacts.model.account.AccountInfo;
 import com.android.contacts.model.account.AccountsLoader;
 import com.android.contacts.model.account.AccountsLoader.AccountsListener;
 import com.android.contacts.util.AccountFilterUtil;
 import com.android.contactsbind.ObjectFactory;

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

 public class DrawerFragment extends Fragment implements AccountsListener {

     private static final int LOADER_GROUPS = 1;
     private static final int LOADER_ACCOUNTS = 2;
     private static final int LOADER_FILTERS = 3;

     private static final String KEY_CONTACTS_VIEW = "contactsView";
     private static final String KEY_SELECTED_GROUP = "selectedGroup";
     private static final String KEY_SELECTED_ACCOUNT = "selectedAccount";

     private WelcomeContentObserver mObserver;
     private ListView mDrawerListView;
     private DrawerAdapter mDrawerAdapter;
     private ContactsView mCurrentContactsView;
     private DrawerFragmentListener mListener;
     // Transparent scrim drawn at the top of the drawer fragment.
     private ScrimDrawable mScrimDrawable;

     private List<GroupListItem> mGroupListItems = new ArrayList<>();
     private boolean mGroupsLoaded;
     private boolean mAccountsLoaded;
     private boolean mHasGroupWritableAccounts;

     private final class WelcomeContentObserver extends ContentObserver {
         private WelcomeContentObserver(Handler handler) {
             super(handler);
         }

         @Override
         public void onChange(boolean selfChange) {
             mDrawerAdapter.notifyDataSetChanged();
         }
     }

     private final LoaderManager.LoaderCallbacks<List<ContactListFilter>> mFiltersLoaderListener =
             new LoaderManager.LoaderCallbacks<List<ContactListFilter>> () {
                 @Override
                 public Loader<List<ContactListFilter>> onCreateLoader(int id, Bundle args) {
                     return new AccountFilterUtil.FilterLoader(getActivity());
                 }

                 @Override
                 public void onLoadFinished(
                         Loader<List<ContactListFilter>> loader, List<ContactListFilter> data) {
                     if (data != null) {
                         if (data == null || data.size() < 2) {
                             mDrawerAdapter.setAccounts(new ArrayList<ContactListFilter>());
                         } else {
                             mDrawerAdapter.setAccounts(data);
                         }
                     }
                 }

                 public void onLoaderReset(Loader<List<ContactListFilter>> loader) {
                 }
             };

     private final LoaderManager.LoaderCallbacks<Cursor> mGroupListLoaderListener =
             new LoaderManager.LoaderCallbacks<Cursor>() {
                 @Override
                 public CursorLoader onCreateLoader(int id, Bundle args) {
                     return new GroupListLoader(getActivity());
                 }

                 @Override
                 public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
                     if (data == null) {
                         return;
                     }
                     mGroupListItems.clear();
                     // Initialize cursor's position. If Activity relaunched by orientation change,
                     // only onLoadFinished is called. OnCreateLoader is not called.
                     // The cursor's position is remain end position by moveToNext when the last
                     // onLoadFinished was called.
                     // Therefore, if cursor position was not initialized mGroupListItems is empty.
                     data.moveToPosition(-1);
                     for (int i = 0; i < data.getCount(); i++) {
                         if (data.moveToNext()) {
                             mGroupListItems.add(GroupUtil.getGroupListItem(data, i));
                         }
                     }
                     mGroupsLoaded = true;
                     notifyIfReady();
                 }

                 public void onLoaderReset(Loader<Cursor> loader) {
                 }
             };

     public DrawerFragment() {}

     @Override
     public void onAttach(Activity activity) {
         super.onAttach(activity);
         if (activity instanceof DrawerFragmentListener) {
             mListener = (DrawerFragmentListener) activity;
         } else {
             throw new IllegalArgumentException(
                     "Activity must implement " + DrawerFragmentListener.class.getName());
         }
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         final View contentView = inflater.inflate(R.layout.drawer_fragment, null);
         mDrawerListView = (ListView) contentView.findViewById(R.id.list);
         mDrawerAdapter = new DrawerAdapter(getActivity());
         mDrawerAdapter.setSelectedContactsView(mCurrentContactsView);
         loadGroupsAndFilters();
         mDrawerListView.setAdapter(mDrawerAdapter);
         mDrawerListView.setOnItemClickListener(mOnDrawerItemClickListener);

         if (savedInstanceState != null) {
             final ContactsView contactsView =
                     ContactsView.values()[savedInstanceState.getInt(KEY_CONTACTS_VIEW)];
             setNavigationItemChecked(contactsView);
             final long groupId = savedInstanceState.getLong(KEY_SELECTED_GROUP);
             mDrawerAdapter.setSelectedGroupId(groupId);
             final ContactListFilter filter = savedInstanceState.getParcelable(KEY_SELECTED_ACCOUNT);
             mDrawerAdapter.setSelectedAccount(filter);
         } else {
             setNavigationItemChecked(ContactsView.ALL_CONTACTS);
         }

         final FrameLayout root = (FrameLayout) contentView.findViewById(R.id.drawer_fragment_root);
         root.setFitsSystemWindows(true);
         root.setOnApplyWindowInsetsListener(new WindowInsetsListener());
         root.setForegroundGravity(Gravity.TOP | Gravity.FILL_HORIZONTAL);

         mScrimDrawable = new ScrimDrawable();
         root.setForeground(mScrimDrawable);

         return contentView;
     }

     @Override
     public void onResume() {
         super.onResume();
         // todo double check on the new Handler() thing
         final Uri uri = ObjectFactory.getWelcomeUri();
         if (uri != null) {
             mObserver = new WelcomeContentObserver(new Handler());
             getActivity().getContentResolver().registerContentObserver(uri, false, mObserver);
         }
     }

     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putInt(KEY_CONTACTS_VIEW, mCurrentContactsView.ordinal());
         outState.putLong(KEY_SELECTED_GROUP, mDrawerAdapter.getSelectedGroupId());
         outState.putParcelable(KEY_SELECTED_ACCOUNT, mDrawerAdapter.getSelectedAccount());
     }

     @Override
     public void onPause() {
         super.onPause();
         if (mObserver != null) {
             getActivity().getContentResolver().unregisterContentObserver(mObserver);
         }
     }

     private void loadGroupsAndFilters() {
         getLoaderManager().initLoader(LOADER_FILTERS, null, mFiltersLoaderListener);
         AccountsLoader.loadAccounts(this, LOADER_ACCOUNTS,
                 AccountTypeManager.AccountFilter.GROUPS_WRITABLE);
         getLoaderManager().initLoader(LOADER_GROUPS, null, mGroupListLoaderListener);
     }

     @Override
     public void onDetach() {
         super.onDetach();
         mListener = null;
     }

     private final OnItemClickListener mOnDrawerItemClickListener = new OnItemClickListener() {
         @Override
         public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
             if (mListener == null) {
                 return;
             }
             final int viewId = v.getId();
             if (viewId == R.id.nav_all_contacts) {
                 mListener.onContactsViewSelected(ContactsView.ALL_CONTACTS);
                 setNavigationItemChecked(ContactsView.ALL_CONTACTS);
             } else if (viewId == R.id.nav_assistant) {
                 mListener.onContactsViewSelected(ContactsView.ASSISTANT);
                 setNavigationItemChecked(ContactsView.ASSISTANT);
             } else if (viewId == R.id.nav_group) {
                 final GroupListItem groupListItem = (GroupListItem) v.getTag();
                 mListener.onGroupViewSelected(groupListItem);
                 mDrawerAdapter.setSelectedGroupId(groupListItem.getGroupId());
                 setNavigationItemChecked(ContactsView.GROUP_VIEW);
             } else if (viewId == R.id.nav_filter) {
                 final ContactListFilter filter = (ContactListFilter) v.getTag();
                 mListener.onAccountViewSelected(filter);
                 mDrawerAdapter.setSelectedAccount(filter);
                 setNavigationItemChecked(ContactsView.ACCOUNT_VIEW);
             } else if (viewId == R.id.nav_create_label) {
                 mListener.onCreateLabelButtonClicked();
             } else if (viewId == R.id.nav_settings) {
                 mListener.onOpenSettings();
             } else if (viewId == R.id.nav_help) {
                 mListener.onLaunchHelpFeedback();
             } else {
                 return;
             }
             mListener.onDrawerItemClicked();
         }
     };

     public void setNavigationItemChecked(ContactsView contactsView) {
         mCurrentContactsView = contactsView;
         if (mDrawerAdapter != null) {
             mDrawerAdapter.setSelectedContactsView(contactsView);
         }
     }

     public void updateGroupMenu(long groupId) {
         mDrawerAdapter.setSelectedGroupId(groupId);
         setNavigationItemChecked(ContactsView.GROUP_VIEW);
     }

     @Override
     public void onAccountsLoaded(List<AccountInfo> accounts) {
         mHasGroupWritableAccounts = !accounts.isEmpty();
         mAccountsLoaded = true;
         notifyIfReady();
     }

     private void notifyIfReady() {
         if (mAccountsLoaded && mGroupsLoaded) {
             final Iterator<GroupListItem> iterator = mGroupListItems.iterator();
             while (iterator.hasNext()) {
                 final GroupListItem groupListItem = iterator.next();
                 if (GroupUtil.isEmptyFFCGroup(groupListItem)) {
                     iterator.remove();
                 }
             }
             mDrawerAdapter.setGroups(mGroupListItems, mHasGroupWritableAccounts);
         }
     }

     private void applyTopInset(int insetTop) {
         // set height of the scrim
         mScrimDrawable.setIntrinsicHeight(insetTop);
         mDrawerListView.setPadding(mDrawerListView.getPaddingLeft(),
                 insetTop, mDrawerListView.getPaddingRight(),
                 mDrawerListView.getPaddingBottom());
     }

     public interface DrawerFragmentListener {
         void onDrawerItemClicked();
         void onContactsViewSelected(ContactsView mode);
         void onGroupViewSelected(GroupListItem groupListItem);
         void onAccountViewSelected(ContactListFilter filter);
         void onCreateLabelButtonClicked();
         void onOpenSettings();
         void onLaunchHelpFeedback();
     }

     private class WindowInsetsListener implements View.OnApplyWindowInsetsListener {
         @Override
         public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
             final int insetTop = insets.getSystemWindowInsetTop();
             applyTopInset(insetTop);
             return insets;
         }
     }
 }
	/*
	* 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.app.Fragment;
	import android.app.LoaderManager;
	import android.content.CursorLoader;
	import android.content.Loader;
	import android.database.ContentObserver;
	import android.database.Cursor;
	import android.net.Uri;
	import android.os.Bundle;
	import android.os.Handler;
	import android.view.Gravity;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.WindowInsets;
	import android.widget.AdapterView;
	import android.widget.AdapterView.OnItemClickListener;
	import android.widget.FrameLayout;
	import android.widget.ListView;

	import com.android.contacts.GroupListLoader;
	import com.android.contacts.R;
	import com.android.contacts.activities.PeopleActivity.ContactsView;
	import com.android.contacts.group.GroupListItem;
	import com.android.contacts.group.GroupUtil;
	import com.android.contacts.list.ContactListFilter;
	import com.android.contacts.model.AccountTypeManager;
	import com.android.contacts.model.account.AccountInfo;
	import com.android.contacts.model.account.AccountsLoader;
	import com.android.contacts.model.account.AccountsLoader.AccountsListener;
	import com.android.contacts.util.AccountFilterUtil;
	import com.android.contactsbind.ObjectFactory;

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

	public class DrawerFragment extends Fragment implements AccountsListener {

	private static final int LOADER_GROUPS = 1;
	private static final int LOADER_ACCOUNTS = 2;
	private static final int LOADER_FILTERS = 3;

	private static final String KEY_CONTACTS_VIEW = "contactsView";
	private static final String KEY_SELECTED_GROUP = "selectedGroup";
	private static final String KEY_SELECTED_ACCOUNT = "selectedAccount";

	private WelcomeContentObserver mObserver;
	private ListView mDrawerListView;
	private DrawerAdapter mDrawerAdapter;
	private ContactsView mCurrentContactsView;
	private DrawerFragmentListener mListener;
	// Transparent scrim drawn at the top of the drawer fragment.
	private ScrimDrawable mScrimDrawable;

	private List<GroupListItem> mGroupListItems = new ArrayList<>();
	private boolean mGroupsLoaded;
	private boolean mAccountsLoaded;
	private boolean mHasGroupWritableAccounts;

	private final class WelcomeContentObserver extends ContentObserver {
	private WelcomeContentObserver(Handler handler) {
	super(handler);
	}

	@Override
	public void onChange(boolean selfChange) {
	mDrawerAdapter.notifyDataSetChanged();
	}
	}

	private final LoaderManager.LoaderCallbacks<List<ContactListFilter>> mFiltersLoaderListener =
	new LoaderManager.LoaderCallbacks<List<ContactListFilter>> () {
	@Override
	public Loader<List<ContactListFilter>> onCreateLoader(int id, Bundle args) {
	return new AccountFilterUtil.FilterLoader(getActivity());
	}

	@Override
	public void onLoadFinished(
	Loader<List<ContactListFilter>> loader, List<ContactListFilter> data) {
	if (data != null) {
	if (data == null \|\| data.size() < 2) {
	mDrawerAdapter.setAccounts(new ArrayList<ContactListFilter>());
	} else {
	mDrawerAdapter.setAccounts(data);
	}
	}
	}

	public void onLoaderReset(Loader<List<ContactListFilter>> loader) {
	}
	};

	private final LoaderManager.LoaderCallbacks<Cursor> mGroupListLoaderListener =
	new LoaderManager.LoaderCallbacks<Cursor>() {
	@Override
	public CursorLoader onCreateLoader(int id, Bundle args) {
	return new GroupListLoader(getActivity());
	}

	@Override
	public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
	if (data == null) {
	return;
	}
	mGroupListItems.clear();
	// Initialize cursor's position. If Activity relaunched by orientation change,
	// only onLoadFinished is called. OnCreateLoader is not called.
	// The cursor's position is remain end position by moveToNext when the last
	// onLoadFinished was called.
	// Therefore, if cursor position was not initialized mGroupListItems is empty.
	data.moveToPosition(-1);
	for (int i = 0; i < data.getCount(); i++) {
	if (data.moveToNext()) {
	mGroupListItems.add(GroupUtil.getGroupListItem(data, i));
	}
	}
	mGroupsLoaded = true;
	notifyIfReady();
	}

	public void onLoaderReset(Loader<Cursor> loader) {
	}
	};

	public DrawerFragment() {}

	@Override
	public void onAttach(Activity activity) {
	super.onAttach(activity);
	if (activity instanceof DrawerFragmentListener) {
	mListener = (DrawerFragmentListener) activity;
	} else {
	throw new IllegalArgumentException(
	"Activity must implement " + DrawerFragmentListener.class.getName());
	}
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	final View contentView = inflater.inflate(R.layout.drawer_fragment, null);
	mDrawerListView = (ListView) contentView.findViewById(R.id.list);
	mDrawerAdapter = new DrawerAdapter(getActivity());
	mDrawerAdapter.setSelectedContactsView(mCurrentContactsView);
	loadGroupsAndFilters();
	mDrawerListView.setAdapter(mDrawerAdapter);
	mDrawerListView.setOnItemClickListener(mOnDrawerItemClickListener);

	if (savedInstanceState != null) {
	final ContactsView contactsView =
	ContactsView.values()[savedInstanceState.getInt(KEY_CONTACTS_VIEW)];
	setNavigationItemChecked(contactsView);
	final long groupId = savedInstanceState.getLong(KEY_SELECTED_GROUP);
	mDrawerAdapter.setSelectedGroupId(groupId);
	final ContactListFilter filter = savedInstanceState.getParcelable(KEY_SELECTED_ACCOUNT);
	mDrawerAdapter.setSelectedAccount(filter);
	} else {
	setNavigationItemChecked(ContactsView.ALL_CONTACTS);
	}

	final FrameLayout root = (FrameLayout) contentView.findViewById(R.id.drawer_fragment_root);
	root.setFitsSystemWindows(true);
	root.setOnApplyWindowInsetsListener(new WindowInsetsListener());
	root.setForegroundGravity(Gravity.TOP \| Gravity.FILL_HORIZONTAL);

	mScrimDrawable = new ScrimDrawable();
	root.setForeground(mScrimDrawable);

	return contentView;
	}

	@Override
	public void onResume() {
	super.onResume();
	// todo double check on the new Handler() thing
	final Uri uri = ObjectFactory.getWelcomeUri();
	if (uri != null) {
	mObserver = new WelcomeContentObserver(new Handler());
	getActivity().getContentResolver().registerContentObserver(uri, false, mObserver);
	}
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putInt(KEY_CONTACTS_VIEW, mCurrentContactsView.ordinal());
	outState.putLong(KEY_SELECTED_GROUP, mDrawerAdapter.getSelectedGroupId());
	outState.putParcelable(KEY_SELECTED_ACCOUNT, mDrawerAdapter.getSelectedAccount());
	}

	@Override
	public void onPause() {
	super.onPause();
	if (mObserver != null) {
	getActivity().getContentResolver().unregisterContentObserver(mObserver);
	}
	}

	private void loadGroupsAndFilters() {
	getLoaderManager().initLoader(LOADER_FILTERS, null, mFiltersLoaderListener);
	AccountsLoader.loadAccounts(this, LOADER_ACCOUNTS,
	AccountTypeManager.AccountFilter.GROUPS_WRITABLE);
	getLoaderManager().initLoader(LOADER_GROUPS, null, mGroupListLoaderListener);
	}

	@Override
	public void onDetach() {
	super.onDetach();
	mListener = null;
	}

	private final OnItemClickListener mOnDrawerItemClickListener = new OnItemClickListener() {
	@Override
	public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
	if (mListener == null) {
	return;
	}
	final int viewId = v.getId();
	if (viewId == R.id.nav_all_contacts) {
	mListener.onContactsViewSelected(ContactsView.ALL_CONTACTS);
	setNavigationItemChecked(ContactsView.ALL_CONTACTS);
	} else if (viewId == R.id.nav_assistant) {
	mListener.onContactsViewSelected(ContactsView.ASSISTANT);
	setNavigationItemChecked(ContactsView.ASSISTANT);
	} else if (viewId == R.id.nav_group) {
	final GroupListItem groupListItem = (GroupListItem) v.getTag();
	mListener.onGroupViewSelected(groupListItem);
	mDrawerAdapter.setSelectedGroupId(groupListItem.getGroupId());
	setNavigationItemChecked(ContactsView.GROUP_VIEW);
	} else if (viewId == R.id.nav_filter) {
	final ContactListFilter filter = (ContactListFilter) v.getTag();
	mListener.onAccountViewSelected(filter);
	mDrawerAdapter.setSelectedAccount(filter);
	setNavigationItemChecked(ContactsView.ACCOUNT_VIEW);
	} else if (viewId == R.id.nav_create_label) {
	mListener.onCreateLabelButtonClicked();
	} else if (viewId == R.id.nav_settings) {
	mListener.onOpenSettings();
	} else if (viewId == R.id.nav_help) {
	mListener.onLaunchHelpFeedback();
	} else {
	return;
	}
	mListener.onDrawerItemClicked();
	}
	};

	public void setNavigationItemChecked(ContactsView contactsView) {
	mCurrentContactsView = contactsView;
	if (mDrawerAdapter != null) {
	mDrawerAdapter.setSelectedContactsView(contactsView);
	}
	}

	public void updateGroupMenu(long groupId) {
	mDrawerAdapter.setSelectedGroupId(groupId);
	setNavigationItemChecked(ContactsView.GROUP_VIEW);
	}

	@Override
	public void onAccountsLoaded(List<AccountInfo> accounts) {
	mHasGroupWritableAccounts = !accounts.isEmpty();
	mAccountsLoaded = true;
	notifyIfReady();
	}

	private void notifyIfReady() {
	if (mAccountsLoaded && mGroupsLoaded) {
	final Iterator<GroupListItem> iterator = mGroupListItems.iterator();
	while (iterator.hasNext()) {
	final GroupListItem groupListItem = iterator.next();
	if (GroupUtil.isEmptyFFCGroup(groupListItem)) {
	iterator.remove();
	}
	}
	mDrawerAdapter.setGroups(mGroupListItems, mHasGroupWritableAccounts);
	}
	}

	private void applyTopInset(int insetTop) {
	// set height of the scrim
	mScrimDrawable.setIntrinsicHeight(insetTop);
	mDrawerListView.setPadding(mDrawerListView.getPaddingLeft(),
	insetTop, mDrawerListView.getPaddingRight(),
	mDrawerListView.getPaddingBottom());
	}

	public interface DrawerFragmentListener {
	void onDrawerItemClicked();
	void onContactsViewSelected(ContactsView mode);
	void onGroupViewSelected(GroupListItem groupListItem);
	void onAccountViewSelected(ContactListFilter filter);
	void onCreateLabelButtonClicked();
	void onOpenSettings();
	void onLaunchHelpFeedback();
	}

	private class WindowInsetsListener implements View.OnApplyWindowInsetsListener {
	@Override
	public WindowInsets onApplyWindowInsets(View v, WindowInsets insets) {
	final int insetTop = insets.getSystemWindowInsetTop();
	applyTopInset(insetTop);
	return insets;
	}
	}
	}