ExpandableListView是ListView控件的延伸，它能够对数据进行分组显示和隐藏，并统计总数量。可进行滚动，对某一内容高亮显示。

<1>编写xml布局文件，用于获取ExpandableListView对象

sf_activity_contact_list.xml

<span style="font-family:Microsoft YaHei;"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/contacts_list_holder"style="@style/SF_ActivityBackground"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@color/sf_activity_background_color"android:overScrollMode="always"android:scrollbarStyle="outsideInset"android:scrollbars="vertical"><!-- style="@style/SF_ActivityBackground" --><ExpandableListViewandroid:id="@+id/contacts_list"android:layout_width="match_parent"android:layout_height="wrap_content"android:fastScrollEnabled="true" ></ExpandableListView></LinearLayout></span>

<2>编写Activity界面，获取ExpandableListView对象。并设置适配器和对应的属性、事件等等

package com.snapfish.ui;import java.util.ArrayList;
import java.util.List;import org.json.JSONException;
import org.json.JSONObject;import android.app.AlertDialog;
import android.app.SearchManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.SearchView.OnQueryTextListener;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.EditText;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ImageView;
import android.widget.TextView;import com.snapfish.R;
import com.snapfish.android.generated.bean.AddressType;
import com.snapfish.android.generated.bean.Entry;
import com.snapfish.android.generated.bean.MrchShippingOption;
import com.snapfish.android.generated.bean.OpenSocialResponseType;
import com.snapfish.android.generated.bean.Person;
import com.snapfish.android.generated.bean.PublisherOrder;
import com.snapfish.android.generated.bean.PublisherOrderAddress;
import com.snapfish.checkout.IUserData;
import com.snapfish.internal.core.SFConstants;
import com.snapfish.internal.database.SFContactsHolderDB;
import com.snapfish.internal.datamodel.SFContact;
import com.snapfish.internal.datamodel.SFContactDBManager;
import com.snapfish.internal.event.SFEventManager;
import com.snapfish.internal.event.SFIEventListener;
import com.snapfish.internal.event.SFLocaleContactsEvent;
import com.snapfish.internal.event.SFRemoteContactsEvent;
import com.snapfish.util.CShippingOptionsAdapter;
import com.snapfish.util.SFActivityUtils;
import com.snapfish.util.SFContactExpandableListAdapter;
import com.snapfish.util.SFLogger;public class SFContactsListActivity extends ABaseActivity { // implements// LoaderManager.LoaderCallbacks<Cursor>private static final SFLogger sLogger = SFLogger.getInstance(SFContactsListActivity.class.getName());private Context m_ctx;private TextView m_contactNameOverlay;private boolean m_visible;// private static final int CONTACT_DATA_LOADER = 111;OnScrollListener mItemsListScrollListener = new OnScrollListener() {@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {m_visible = true;// when stop scrollingif (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {m_contactNameOverlay.setVisibility(View.INVISIBLE);m_visible = false;}// when scrolling and the finger is on the screenelse if (scrollState == OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {}// when scrolling and the finger perform an action aboveelse if (scrollState == OnScrollListener.SCROLL_STATE_FLING) {}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {if (visibleItemCount > 0 && m_visible) {SFContact contact = mPhoneContacts.get(firstVisibleItem);m_contactNameOverlay.setText(String.valueOf(contact.getName().charAt(0)));m_contactNameOverlay.setVisibility(View.VISIBLE);}}};/*************************************************** The event of getting locale contacts*************************************************/private SFIEventListener<SFLocaleContactsEvent> m_localeContactListEvent = new SFIEventListener<SFLocaleContactsEvent>() {@Overridepublic void onEvent(SFLocaleContactsEvent event) {// TODO The event of getting locale contactssLogger.debug("****************The event of getting locale contacts*****************");hideProgressDialog();if (null != event && event.getContactsList() != null) {mPhoneContacts = event.getContactsList();showProgressDialog(getString(R.string.sf_please_wait),getString(R.string.sf_progress_remote_contact_list));// Get all remote contactsSFContactDBManager.asyncGetAllRemoteContacts(getSession());}}};/*************************************************** The event of getting remote contacts*************************************************/private SFIEventListener<SFRemoteContactsEvent> m_remoteContactListEvent = new SFIEventListener<SFRemoteContactsEvent>() {@Overridepublic void onEvent(SFRemoteContactsEvent event) {// TODO The event of getting remote contactssLogger.debug("****************The event of getting remote contacts*****************");hideProgressDialog();if (null != event && event.getOpenSocialResponseType() != null) {OpenSocialResponseType osrt = event.getOpenSocialResponseType();if (null != osrt) {List<Entry> entries = osrt.getEntryList();if (null != entries && !entries.isEmpty()) {int entrySize = entries.size();for (int i = 0; i < entrySize; i++) {try {Person person = Person.newFromJSON(entries.get(i).toJSON());if (null != person) {AddressType address = person.getAddress();String displayName = person.getDisplayName();if (isValidContact(address)&& !TextUtils.isEmpty(displayName)) {SFContact contact = new SFContact(IUserData.EUserDataType.SNAPFISH,person.getId(),displayName,address.getStreet1(),address.getCity(),address.getProvince(),address.getPostalCode(),SFContact.ContactAddressType.TYPE_OTHER);contact.setGuessedPrecision(SFContact.GuessedPrecision.ABSOLUTE);contact.setCountry(address.getCountry() == null ? getResources().getConfiguration().locale.getCountry() : address.getCountry());contact.setAddressGuessed(false);contact.setIsConfirmed(true);contact.setPhone(address.getPhone());mPhoneContacts.add(contact);}}} catch (JSONException e) {sLogger.error(e.getMessage());}}}}}onContactsListCreated();}};/** carry over from order review activity in case if contact has to be edited* or order update must happen on this screen*/private PublisherOrder m_publisherOrder;private int m_orderQuantity;private long m_mrchId;private SFContact mSelectedAddress;private List<SFContact> mPhoneContacts;private ExpandableListView mContactsListView;private SFContactExpandableListAdapter mContactsListAdapter;private List<MrchShippingOption> m_mrchShippingOptions = new ArrayList<MrchShippingOption>();private String m_shippingOptionDesc;private String m_shippingOptionType;/* search */private MenuItem searchItem;private SearchView mSearchView;private ImageView closeBtn;private EditText searchEditText;public static boolean isSearchQuery;private String mSearchString;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.sf_activity_contact_list);m_ctx = this;// getSupportLoaderManager().initLoader(CONTACT_DATA_LOADER, null,// this);// Display home and finish current activitySFActivityUtils.displayHomeAsUp(this);getDataFromIntent();mContactsListView = (ExpandableListView) findViewById(R.id.contacts_list);/** on child click the action that happens will depend whether contact* selected is confirmed or not, meaning that the end-user has validated* address and order can be safely sent to selected address*/mContactsListView.setOnChildClickListener(new OnChildClickListener() {@Overridepublic boolean onChildClick(ExpandableListView parent, View v,int groupPosition, int childPosition, long id) {mSelectedAddress = (SFContact) mContactsListAdapter.getChild(groupPosition, childPosition);/** in the event when address precision is below 100% it must be* validated by the end-user so the CShippingAddressActivity is* launched first*/Intent exitIntent = null;if (mSelectedAddress.getGuessedPrecision() != SFContact.GuessedPrecision.ABSOLUTE) {exitIntent = new Intent(SFContactsListActivity.this,SFShippingAddressActivity.class);/* pass contact _id */exitIntent.putExtra(SFContactsHolderDB.SFContactColumns._ID,mSelectedAddress.getId());/* selected shipping address for edit */exitIntent.putExtra(SFConstants.SF_SHIPPING_ADDRESS,handleLocalization(mSelectedAddress));/* shipping options */exitIntent.putExtra(SFConstants.MRCH_SHIP_OPTIONS,getIntent().getStringArrayExtra(SFConstants.MRCH_SHIP_OPTIONS));/* order ID ? */exitIntent.putExtra(SFConstants.ORDERID,m_publisherOrder.getOrderId());/* quantity ? */exitIntent.putExtra(SFConstants.ORDER_QUANTITY, getIntent().getIntExtra(SFConstants.ORDER_QUANTITY, -1));/* mrchId */exitIntent.putExtra(SFConstants.MRCH_ID, getIntent().getLongExtra(SFConstants.MRCH_ID, -1));/* and finally order */exitIntent.putExtra(SFConstants.SF_ORDER, orderAsString());startActivityForResult(exitIntent,SFConstants.SF_REQUEST_CODE_SHIPPING_ADDRESS);} else {/* adding selected address to order */m_publisherOrder.setShippingAddress(mSelectedAddress);resetShippingOptions();if (m_shippingOptionDesc != null&& m_shippingOptionType != null) {exitIntent = new Intent();exitIntent.putExtra(SFConstants.SF_ORDER,orderAsString());exitIntent.putExtra(SFConstants.SF_SHIPPING_OPTION_DESCRIPTION,m_shippingOptionDesc);exitIntent.putExtra(SFConstants.SF_SHIPPING_OPTION_SHIPPING_TYPE,m_shippingOptionType);setResult(RESULT_OK, exitIntent);finish();}}return false;}});}@Overrideprotected void onResume() {// register the event of getting locale contactsSFEventManager.subscribe(m_ctx, SFLocaleContactsEvent.class,m_localeContactListEvent);// register the event of getting remote contactsSFEventManager.subscribe(m_ctx, SFRemoteContactsEvent.class,m_remoteContactListEvent);m_contactNameOverlay = (TextView) LayoutInflater.from(m_ctx).inflate(R.layout.sf_contact_pop_overlay, null);m_contactNameOverlay.setVisibility(View.INVISIBLE);WindowManager.LayoutParams lp = new WindowManager.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT,WindowManager.LayoutParams.TYPE_APPLICATION,WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,PixelFormat.TRANSLUCENT);WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);windowManager.addView(m_contactNameOverlay, lp);showProgressDialog(getString(R.string.sf_please_wait),getString(R.string.sf_progress_locale_contact_list));// Get all local contactsSFContactDBManager.asyncGetAllLocalContacts(getSession());// initializeData();// ctx = this;// mContactsListView.setAdapter(new ContactExpandListAdapter(group,// child, ctx));super.onResume();}@Overrideprotected void onPause() {// uninstall the event of getting locale contactsSFEventManager.unsubscribe(m_ctx, SFLocaleContactsEvent.class,m_localeContactListEvent);// uninstall the event of getting remote contactsSFEventManager.unsubscribe(m_ctx, SFRemoteContactsEvent.class,m_remoteContactListEvent);super.onPause();}/*** simply copies street1 into street2 whenever street2 is a mandatory field* in the address entry* * @param contact* @return*/private String handleLocalization(PublisherOrderAddress contact) {if (getResources().getBoolean(R.bool.sf_address_street2_required)) {sLogger.debug("not a localized address: " + contact.toString());if (contact.getStreet2() == null) {contact.setStreet2(contact.getStreet1());contact.setStreet1(null);}}String convertedAddr = "";try {convertedAddr = contact.toJSON().toString();sLogger.debug("localized address: " + convertedAddr);} catch (JSONException e) {sLogger.error("cannot convert selected address: " + e);}return convertedAddr;}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == SFConstants.SF_REQUEST_CODE_SHIPPING_ADDRESS) {if (resultCode == RESULT_OK) {/** after a contact had been verified by end-user it's precision* level is moved to ABSOLUTE*/mSelectedAddress.setGuessedPrecision(SFContact.GuessedPrecision.ABSOLUTE);setResult(RESULT_OK, data);finish();}}}/*** carry over the data required by CShippingAddressActivity*/private void getDataFromIntent() {Intent intent = getIntent();String order = intent.getStringExtra(SFConstants.SF_ORDER);String[] mrchShippingOptions = getIntent().getStringArrayExtra(SFConstants.MRCH_SHIP_OPTIONS);if (order != null) {try {m_publisherOrder = PublisherOrder.newFromJSON(new JSONObject(order));if (null != mrchShippingOptions) {for (String mrchShippingOption : mrchShippingOptions) {m_mrchShippingOptions.add(MrchShippingOption.newFromJSON(new JSONObject(mrchShippingOption)));}}} catch (JSONException e) {sLogger.error("cannot parse order: " + order);sLogger.error("cannot parse order: " + e);}} else {showWarningDialog("Order failed", "order not found in intent");}}/*** initializes the contacts list adapter*/private void onContactsListCreated() {/* set adapter */mContactsListAdapter = new SFContactExpandableListAdapter(this,mPhoneContacts);mContactsListView.setAdapter(mContactsListAdapter);/* hide the divider */mContactsListView.setDivider(null);/** hide indicator, by design it's the first letter of a contact that* takes place of the indicator*/mContactsListView.setGroupIndicator(null);/** make list state expanded - the first time it should display expanded* list of contacts*/for (int i = 0; i < mContactsListAdapter.getGroupCount(); i++) {mContactsListView.expandGroup(i);}/** onScrollListener*/mContactsListView.setOnScrollListener(mItemsListScrollListener);}// private List<String> group;// 组列表// private List<List<String>> child;// 子列表// private Context ctx;//// private void initializeData() {// group = new ArrayList<String>();// child = new ArrayList<List<String>>();//// addInfo("Andy", new String[] { "male", "138123***", "GuangZhou" });// addInfo("Fairy", new String[] { "female", "138123***", "GuangZhou" });// addInfo("Jerry", new String[] { "male", "138123***", "ShenZhen" });// addInfo("Tom", new String[] { "female", "138123***", "ShangHai" });// addInfo("Bill", new String[] { "male", "138231***", "ZhanJiang" });// }//// private void addInfo(String group, String[] child) {// this.group.add(group);// List<String> childItem = new ArrayList<String>();// for (int i = 0; i < child.length; i++) {// childItem.add(child[i]);// }//// this.child.add(childItem);// }/*** converts order to string* * @return*/private String orderAsString() {String orderAsString = "";try {orderAsString = m_publisherOrder.toJSON().toString();} catch (JSONException e) {e.printStackTrace();}return orderAsString;}private void resetShippingOptions() {PublisherOrder order = m_publisherOrder;PublisherOrderAddress cnt = null;try {cnt = PublisherOrderAddress.newFromJSON(new JSONObject(handleLocalization(order.getShippingAddress())));sLogger.debug("order address: " + cnt.toJSON());} catch (JSONException e) {e.printStackTrace();}if (m_mrchShippingOptions.size() > 0) {CShippingOptionsAdapter soa = new CShippingOptionsAdapter(getApplicationContext(), getSession().getAppCredentials().getLocale(), m_mrchShippingOptions, m_mrchId,m_orderQuantity, cnt);String shipping = getApplicationContext().getResources().getString(R.string.sf_order_shipping_opt_no_colon);sLogger.debug("getSession().getAppCredentials().getLocale(): "+ getSession().getAppCredentials().getLocale());sLogger.debug("soa.getAvailableShipOptions().size(): "+ soa.getAvailableShipOptions().size());if (soa.getAvailableShipOptions().size() > 0) {MrchShippingOption item = soa.getAvailableShipOptions().get(0);String shippingDescription = item.getDescription();String shippingType = Character.toString(shippingDescription.charAt(0)).toUpperCase()+ shippingDescription.substring(1);order.setShippingOption(item.getShippingCode());order.setShipping(0.0f);m_shippingOptionDesc = soa.estimatedDeliveryDays(item.getShippingCode());m_shippingOptionType = shippingType + shipping;showProgressDialog(getResources().getString(R.string.sf_please_wait),getResources().getString(R.string.sf_progress_update_order));} else {showErrorAlertDialog();}}}private void showErrorAlertDialog() {AlertDialog.Builder alertDialog = new AlertDialog.Builder(SFContactsListActivity.this);alertDialog.setTitle(R.string.sf_warning_dialog_title);alertDialog.setMessage(R.string.sf_error_no_shipping_options).setPositiveButton("OK", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}}).show();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.sf_menu_p2r, menu);searchItem = menu.findItem(R.id.p2r_action_search);mSearchView = (SearchView) MenuItemCompat.getActionView(searchItem);searchEditText = (EditText) mSearchView.findViewById(R.id.search_src_text);searchEditText.setHintTextColor(getResources().getColor(R.color.sf_button_normal));searchEditText.setHint(R.string.sf_contacts_search_hint);SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);ComponentName searchComponent = new ComponentName(this,SFContactsListActivity.class);mSearchView.setSearchableInfo(searchManager.getSearchableInfo(searchComponent));mSearchView.setIconifiedByDefault(true);mSearchView.setSubmitButtonEnabled(false);closeBtn = (ImageView) mSearchView.findViewById(R.id.search_close_btn);MenuItemCompat.setOnActionExpandListener(searchItem,new MenuItemCompat.OnActionExpandListener() {@Overridepublic boolean onMenuItemActionCollapse(MenuItem arg0) {sLogger.debug("search field collapsed");return true;}@Overridepublic boolean onMenuItemActionExpand(MenuItem arg0) {sLogger.debug("search field expanded");return true;}});closeBtn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {searchEditText.setText("");}});mSearchView.setOnQueryTextListener(new OnQueryTextListener() {@Overridepublic boolean onQueryTextSubmit(String arg0) {return false;}@Overridepublic boolean onQueryTextChange(String searchText) {if (searchText.length() > 0) {mSearchString = searchText;sLogger.debug("search text is: " + searchText);} else {mSearchString = null;sLogger.debug("reset list");}return true;}});return super.onCreateOptionsMenu(menu);}/*** Invoking this method when the item option of menu selected*/@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// when the top|left icon selected,finish current activityif (item.getItemId() == android.R.id.home) {finish();overridePendingTransition(R.anim.fade_in, R.anim.fade_out);return true;}return super.onOptionsItemSelected(item);}private boolean isValidContact(AddressType addressType) {if (addressType == null)return false;if (!TextUtils.isEmpty(addressType.getStreet1())&& !TextUtils.isEmpty(addressType.getCity())&& !TextUtils.isEmpty(addressType.getProvince())&& !TextUtils.isEmpty(addressType.getPhone()))return true;return false;}}

<3>编写布局文件sf_view_contact_sort_header.xml。用于展示租名和记录数量。

<?

xml version="1.0" encoding="utf-8"?

> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:paddingTop="5dp" android:paddingBottom="5dp" android:paddingLeft="@dimen/sf_standard_layout_padding" android:paddingRight="@dimen/sf_standard_layout_padding" android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:id="@+id/sf_contact_sort_by_name" style="@style/SF_MediumBlueBoldTxt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="5dp" android:layout_marginLeft="5dp" android:text="@string/sf_contacts_sorting_txt" /> <TextView android:id="@+id/sf_contact_sort_counter" style="@style/SF_SmallLightGreyTxt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:gravity="right" android:text="@string/sf_contacts_counter_txt" android:visibility="gone" /> </RelativeLayout>

<4>编写布局文件sf_view_contact_item.xml，用于展示数据的内容：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"style="@style/SF_SelectableSectionBackground"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@color/sf_activity_background_color"android:paddingBottom="5dp"android:paddingLeft="@dimen/sf_contact_item_layout_padding"android:paddingRight="@dimen/sf_contact_item_layout_padding" ><LinearLayoutandroid:id="@+id/sf_ll_contact_item_divider"style="@style/SF_HorizontalDivider"android:layout_width="match_parent"android:layout_marginBottom="5dp"android:orientation="horizontal" /><includeandroid:id="@+id/sf_include_contact_item_photo"android:layout_width="65dp"android:layout_height="65dp"android:layout_alignLeft="@+id/sf_ll_contact_item_divider"android:layout_alignTop="@+id/sf_ll_contact_item_divider"android:layout_centerHorizontal="true"android:layout_centerInParent="true"android:layout_centerVertical="true"android:layout_marginTop="5dp"layout="@layout/sf_view_contact_graphics"android:visibility="visible" /><LinearLayoutandroid:id="@+id/sf_ll_contact_item_details"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginBottom="5dp"android:layout_marginLeft="5dp"android:layout_marginRight="5dp"android:layout_marginTop="5dp"android:layout_toRightOf="@id/sf_include_contact_item_photo"android:gravity="left|center_horizontal"android:orientation="vertical" ><!-- name --><TextViewandroid:id="@+id/sf_tv_contact_item_name"style="@style/SF_MediumBlackTxt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="left"android:ellipsize="end"android:singleLine="true"android:text="@string/sf_name_placeholder" /><!-- name end --><!-- address --><TextViewandroid:id="@+id/sf_tv_contact_item_address"style="@style/SF_SmallGreyTxt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="left"android:ellipsize="end"android:singleLine="false"android:text="@string/sf_address_placeholder"android:textAlignment="center" /><!-- address end --><TextViewandroid:id="@+id/sf_tv_contact_item_phone"style="@style/SF_MediumLightGreyTxt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:ellipsize="end"android:minLines="1"android:scrollHorizontally="false"android:singleLine="true"android:text="@string/sf_adress_type_txt"android:visibility="gone" /></LinearLayout></RelativeLayout>

<5>编写SFContactExpandableListAdapter.java。继承BaseExpandableListAdapter.java

package com.snapfish.util;import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;import android.annotation.SuppressLint;
import android.content.ContentUris;
import android.content.Context;
import android.content.res.Resources;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.Uri;
import android.provider.ContactsContract.Contacts;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;import com.snapfish.R;
import com.snapfish.checkout.IUserData;
import com.snapfish.internal.datamodel.SFContact;
import com.snapfish.ui.SFContactsListActivity;public class SFContactExpandableListAdapter extends BaseExpandableListAdapter { // implements// LoaderManager.LoaderCallbacks<Cursor>private static final SFLogger sLogger = SFLogger.getInstance(SFContactsListActivity.class.getName());private Context m_ctx;private ViewHolder m_viewHolder;private List<SFContact> mCombinedContacts;private Map<String, List<SFContact>> mSortedContacts;public SFContactExpandableListAdapter(Context mContext,List<SFContact> mCombinedContacts) {this.m_ctx = mContext;this.mCombinedContacts = mCombinedContacts;this.mSortedContacts = getSortedContacts();m_viewHolder = new ViewHolder();}@Overridepublic int getGroupCount() {return mSortedContacts.size();}@Overridepublic int getChildrenCount(int groupPosition) {List<SFContact> children = mSortedContacts.get(getKeyByPosition(groupPosition));return children.size();}@Overridepublic Object getGroup(int groupPosition) {List<SFContact> group = mSortedContacts.get(getKeyByPosition(groupPosition));return group;}@Overridepublic Object getChild(int groupPosition, int childPosition) {@SuppressWarnings("unchecked")List<SFContact> selectedGroup = (List<SFContact>) getGroup(groupPosition);if (selectedGroup.size() < childPosition)return null;return selectedGroup.get(childPosition);}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@SuppressWarnings("unchecked")@Overridepublic long getChildId(int groupPosition, int childPosition) {List<SFContact> childGroup = (List<SFContact>) getGroup(groupPosition);if (null != childGroup && childGroup.get(childPosition) != null)return childPosition;return 0;}@Overridepublic boolean hasStableIds() {return false;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {View row = LayoutInflater.from(m_ctx).inflate(R.layout.sf_view_contact_sort_header, parent, false);TextView sortTextView = (TextView) row.findViewById(R.id.sf_contact_sort_by_name);TextView countTextView = (TextView) row.findViewById(R.id.sf_contact_sort_counter);String letter = getKeyByPosition(groupPosition);if (groupPosition == 0) {countTextView.setVisibility(View.VISIBLE);countTextView.setText("" + mCombinedContacts.size() + " "+ m_ctx.getString(R.string.sf_contacts_counter_txt));}sortTextView.setText("  " + letter);return row;}@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {SFContact contact = (SFContact) getChild(groupPosition, childPosition);if (contact != null) {// SFContact.ContactAddressType displayType = contact// .getAddressType();String displayName = contact.getName();String displayAddress = getContactAddress(contact);View row = LayoutInflater.from(m_ctx).inflate(R.layout.sf_view_contact_item, parent, false);// contact namem_viewHolder.m_name = (TextView) row.findViewById(R.id.sf_tv_contact_item_name);m_viewHolder.m_name.setText(displayName);// contact addressm_viewHolder.m_address = (TextView) row.findViewById(R.id.sf_tv_contact_item_address);m_viewHolder.m_address.setText(displayAddress);/* contact address type */m_viewHolder.m_phone = (TextView) row.findViewById(R.id.sf_tv_contact_item_phone);// contact photosetContactIcon(row, contact, getKeyByPosition(groupPosition));// if (isMultipleAddress(groupPosition, childPosition)// || contact.getGuessedPrecision() ==// SFContact.GuessedPrecision.LOW) {// showAddressType(m_viewHolder.m_phone,// contact.getGuessedPrecision(), displayType);// }row.setTag(m_viewHolder);return row;}return convertView;}/*** to avoid displaying address type when we do not have matching contacts* * @param groupPosition* @param childPosition* @return*/private boolean isMultipleAddress(int groupPosition, int childPosition) {@SuppressWarnings("unchecked")List<SFContact> group = (List<SFContact>) getGroup(groupPosition);SFContact reference = (SFContact) getChild(groupPosition, childPosition);String referenceName = reference.getName();int i = group.size();for (int a = 0; a < i; a++) {if (a != childPosition)if (referenceName.equalsIgnoreCase(group.get(a).getName()))return true;}return false;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {return true;}/*** contact icons are of three kinds: image, icon, or warning message* * @param aContact* @param letter* @param addrPositiveMatch*/private void setContactIcon(View row, SFContact aContact, String letter) {// TODO guessed precision was not set in the DB - set it upSFContact.GuessedPrecision addrPositiveMatch = aContact.getGuessedPrecision();ViewGroup contactImageView = (ViewGroup) row.findViewById(R.id.sf_include_contact_item_photo);if (contactImageView != null) {ImageView unverifiedAddress = (ImageView) contactImageView.findViewById(R.id.sf_iv_contact_need_confirmation);LinearLayout noCntPhoto = (LinearLayout) contactImageView.findViewById(R.id.sf_ll_contact_no_photo);TextView cntFirstLetter = (TextView) noCntPhoto.findViewById(R.id.sf_tv_contact_name_letter);ImageView defaultCntIcon = (ImageView) contactImageView.findViewById(R.id.sf_iv_contact_default_photo);defaultCntIcon.setVisibility(View.GONE);cntFirstLetter.setVisibility(View.GONE);noCntPhoto.setVisibility(View.GONE);/* get profile photo bitmap to load into ImageView */Bitmap bmp = getProfilePhoto(aContact);switch (addrPositiveMatch) {case ABSOLUTE:if (bmp != null) {defaultCntIcon.setVisibility(View.VISIBLE);defaultCntIcon.setImageBitmap(bmp);} else {noCntPhoto.setVisibility(View.VISIBLE);noCntPhoto.setBackgroundColor(Color.parseColor(getRandomColor()));cntFirstLetter.setVisibility(View.VISIBLE);cntFirstLetter.setText(letter);}break;case HIGH:unverifiedAddress.setVisibility(View.VISIBLE);break;case MEDIUM:unverifiedAddress.setVisibility(View.VISIBLE);break;case LOW:break;default:unverifiedAddress.setVisibility(View.VISIBLE);break;}}}private void showAddressType(TextView typeView,SFContact.GuessedPrecision precisionLevel,SFContact.ContactAddressType displayType) {Resources r = m_ctx.getResources();// typeView.setVisibility(View.VISIBLE);typeView.setVisibility(View.GONE);if (precisionLevel != SFContact.GuessedPrecision.ABSOLUTE) {// not// verified// (guessed)// addresstypeView.setTextColor(r.getColor(R.color.sf_error_message_txt_color));typeView.setText(r.getString(R.string.sf_verify_address_label));} else if (displayType != null) { // verified addresstypeView.setText(getAddressType(displayType));}}private int colorsUsed;/*** using preset swatches to set background colors in the layout* * @return*/private String getRandomColor() {String[] colorChoises = m_ctx.getResources().getStringArray(R.array.sf_swatches_sp_set);if (colorsUsed == colorChoises.length)colorsUsed = 0;String colorOut = colorChoises[colorsUsed];colorsUsed++;return colorOut;}private Bitmap getProfilePhoto(SFContact aContact) {if (aContact.getContactSource().equals(IUserData.EUserDataType.PHONEBOOK)) {InputStream photoStream = getPhotoAsInputSteam(aContact);if (photoStream != null)return BitmapFactory.decodeStream(photoStream);}return null;}private String getKeyByPosition(int groupPosition) {int keyPosition = 0;Iterator<String> iter = mSortedContacts.keySet().iterator();while (iter.hasNext()) {String key = iter.next();if (keyPosition == groupPosition) {return key;}keyPosition++;}return null;}/*** extracting first letter of display name* * @return*/private Collection<String> extractFirstLetter() {Collection<String> sortByLetter = new HashSet<String>();int index = mCombinedContacts.size();Collections.sort(mCombinedContacts, new Comparator<SFContact>() {@Overridepublic int compare(SFContact lhs, SFContact rhs) {return lhs.getName().compareTo(rhs.getName());}});for (int i = 0; i < index; i++) {char letter = mCombinedContacts.get(i).getName().charAt(0);sortByLetter.add(String.valueOf(letter).toUpperCase());}return sortByLetter;}private Map<String, List<SFContact>> getSortedContacts() {List<SFContact> selectedContact = null;mSortedContacts = new TreeMap<String, List<SFContact>>();Iterator<String> firstLetter = extractFirstLetter().iterator();while (firstLetter.hasNext()) {String s = firstLetter.next();int index = mCombinedContacts.size();selectedContact = new ArrayList<SFContact>();for (int i = 0; i < index; i++) {String initChar = String.valueOf(mCombinedContacts.get(i).getName().charAt(0));if (s.equalsIgnoreCase(initChar)) {selectedContact.add(mCombinedContacts.get(i));}}mSortedContacts.put(s, selectedContact);}return mSortedContacts;}/*** retrieves address type string from arrays.xml* * @param addressType* @return*/private String getAddressType(SFContact.ContactAddressType addressType) {String addrTypeOut = "";int arrSize = m_ctx.getResources().getStringArray(R.array.sf_address_type).length;if (arrSize != 0 && arrSize == 3) {switch (addressType) {case TYPE_HOME:addrTypeOut = m_ctx.getResources().getStringArray(R.array.sf_address_type)[0];break;case TYPE_WORK:addrTypeOut = m_ctx.getResources().getStringArray(R.array.sf_address_type)[1];break;case TYPE_OTHER:default:addrTypeOut = m_ctx.getResources().getStringArray(R.array.sf_address_type)[2];break;}} elseaddrTypeOut = "UNKNOWN";return addrTypeOut;}private InputStream getPhotoAsInputSteam(SFContact contact) {byte[] data = contact.getContactPhotoData();if (data != null) {return new ByteArrayInputStream(contact.getContactPhotoData());}return null;}@SuppressLint("InlinedApi")private InputStream openPhoto(long contactId) {Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI,contactId);Uri photoUri = Uri.withAppendedPath(contactUri,Contacts.Photo.CONTENT_DIRECTORY);Cursor cursor = m_ctx.getContentResolver().query(photoUri,new String[] { Contacts.Photo.PHOTO }, null, null, null);if (cursor == null) {return null;}try {if (cursor.moveToFirst()) {byte[] data = cursor.getBlob(0);if (data != null) {return new ByteArrayInputStream(data);}}} finally {cursor.close();}return null;}private String getContactAddress(SFContact contact) {StringBuilder sb = new StringBuilder();sb.append(contact.getCountry() + " ");sb.append(contact.getProvince() + " ");sb.append(contact.getCity() + " ");sb.append(TextUtils.isEmpty(contact.getStreet1()) ? (TextUtils.isEmpty(contact.getStreet2()) ? (TextUtils.isEmpty(contact.getStreet3()) ? "" : contact.getStreet3()) : contact.getStreet2()) : contact.getStreet1() + "  ");sb.append(contact.getPostalCode() + "\n");sb.append(contact.getPhone());return sb.toString();}private static class ViewHolder {TextView m_name;TextView m_address;TextView m_phone;}}

注意

继承BaseExpandableListAdapter需实现对应的方法：

<1>getGroupId()：获取组号

<2>getChildId()：获取子元素编号（位于组中）

<3>getGroup()：获取指定组的组内容

<4>getChild()：依据组和子元素的位置获取子元素内容

<5>getGroupCount()：获取组的数目

<6>getChildrenCount()：获取相应组的子元素的数目

<7>getGroupView()：获取View对象用于显示组内容

<8>getChildView()：依据组和子元素的位置获取View对象用于显示子元素的内容

<9>hasStableIds()：组和子元素是否持有稳定的ID,也就是底层数据的改变不会影响到它们

<10>isChildSelectable()：是否可选择指定位置的子元素