Phonebook导出联系人到SD卡（.vcf）

1. 在Phonebook中导出联系人到内部存储，SD卡或者通过蓝牙、彩信、邮件等分享联系人时，通常会先将选择的联系人打包生成.vcf文件，然后将.vcf文件分享出去或者导出到存储设备上。以Phonebook中导出联系人到SD卡为例，前戏部分跳过，直奔主题。

2. 当用户选择导出联系人到SD卡时，会提示用户具体导出的路径等，然后需要用户点击“确定”button，此时启动ExportVcardThread线程执行具体的导出操作。代码的调用流程如下：

启动ExportVCardActivity，弹出一个Dialog提示用户并让用户确定，确认button的事件监听是ExportConfirmationListener， 代码如下：

 1 private class ExportConfirmationListener implements DialogInterface.OnClickListener { 2     private final String mFileName; 3  4     public ExportConfirmationListener(String fileName) { 5         mFileName = fileName; 6     } 7  8     public void onClick(DialogInterface dialog, int which) { 9         if (which == DialogInterface.BUTTON_POSITIVE) {10             mExportingFileName = mFileName;11             progressDialogShow();12 13             mListenerAdapter = new ListenerThreadBridgeAdapter(ExportVCardActivity.this);14             mActualExportThread = new ExportVcardThread(null, ExportVCardActivity.this,15                     mFileName, mListenerAdapter, false);16             mActualExportThread.start();17         }18     }19 }

注意红色部分，很简单，创建一个ExportVcardThread对象，将即将生成的.vcf文件的名称当作参数传入，同时start这个线程。

下面进入ExportVcardThread线程类一探究竟。

2. ExportVcardThread线程类

查看线程类的run（）方法，有如下代码：

 1 try { 2     outputStream = new FileOutputStream(mFileName); 3 } catch (FileNotFoundException e) { 4     mErrorReason = mContext.getString( 5             R.string.spb_strings_fail_reason_could_not_open_file_txt, mFileName, 6             e.getMessage()); 7     isComposed = false; 8     return; 9 }10 11 isComposed = compose(outputStream);

创建了文件输出流，可见对.vcf文件的操作将会以流的形式进行，然后调用compose(outputStream)，将创建的输出流对象当作参数传入。compose（）方法很大，但其实只做了两件事：（1）查询数据库获得要导出的联系人信息；（2）将联系人信息编码导出到.vcf文件，核心代码如下：

 1 private boolean compose(OutputStream outputStream) { 2  3     try { 4         final ContentResolver cr = mContext.getContentResolver(); 5         StringBuilder selection = new StringBuilder(); 6         StringBuilder order = new StringBuilder(); 7  8         // exclude restricted contacts. 9         final Uri.Builder contactsUri = ContactsContract.Contacts.CONTENT_URI.buildUpon();10         contactsUri.appendQueryParameter(ContactsContract.REQUESTING_PACKAGE_PARAM_KEY, "");11         c = cr.query(contactsUri.build(), CLMN, selection.toString(), null,12                     order.toString());    （1）13 14         while (c.moveToNext()) {15             if (mCanceled) {16                 break;17             }18             count++;19             lookupKeys.append(c.getString(lookupClmn));20             if (!c.isLast() && count < VCARD_REQUEST_LIMIT) {21                 lookupKeys.append(":");22                 continue;23             }24             final Uri.Builder vcardUri = ContactsContract.Contacts.CONTENT_MULTI_VCARD_URI.buildUpon();25             vcardUri.appendPath(lookupKeys.toString());26             vcardUri.appendQueryParameter("vcard_type", mVcardTypeStr);27             Log.d("D33", "mVcardTypeStr = " + mVcardTypeStr);28             Log.d("D33", "vcardUri.build() = " + vcardUri.build());29             final InputStream is = cr.openInputStream(vcardUri.build());    （2）30             if (copyStream(buff, is, outputStream) > 0) {31                 hasActualEntry = true;32             }33 34             if (mListener != null) {35                 mListener.incrementProgressBy(count);36             }37             count = 0;38             lookupKeys.setLength(0);39         }40     }41     return success;42 }

（1）处代码负责query联系人，稍微提一下，

selection=_id IN (SELECT contacts._id FROM contacts,raw_contacts JOIN accounts ON account_id=accounts._id WHERE contacts.name_raw_contact_id = raw_contacts._id AND accounts.account_type != 'com.***.sdncontacts' AND raw_contacts.is_restricted=0) AND in_visible_group=1，

这个就是查询联系人的条件，也就是说只有满足这个条件的联系人才会被导出，因此，不是所有联系人都会被导出的，比如Facebook联系人就不会被导出。

（2）处的几行代码主要是获得了一个输入流，cr.openInputStream(vcardUri.build())，看代码可以发现，首先是将符合条件的联系人的lookupkey全部保存到lookupKeys，并且调用vcardUri.appendPath(lookupKeys.toString())：

1 lookupKeys = 1135i3:1135i62 vcardUri.build() = content://com.android.contacts/contacts/as_multi_vcard/1135i3%3A1135i6?vcard_type=default

lookupKeys是将所有联系人的lookupKey连接起来，中间用“：”分隔。然后调用copyStream(buff, is, outputStream)，看名字就知道作用是copy输入流到输出流，代码如下：

 1 private int copyStream(byte[] buff, InputStream is, OutputStream os) throws IOException { 2     int copiedLength = 0; 3     if (is == null || os == null) { 4         return copiedLength; 5     } 6  7     int sz = 0; 8     do { 9         sz = is.read(buff);10         if (sz > 0) {11             os.write(buff, 0, sz);12             copiedLength += sz;13         }14     } while (sz > 0);15 16     return copiedLength;17 }

那么现在最关键的问题就是输入流是如何得到的，如何将联系人编码生成符合vcf标准的信息呢？根据上面提到的vcardUri=com.android.contacts/contacts/as_multi_vcard/1135i3%3A1135i6?vcard_type=default，发现我们需要深入Phonebook的数据库走一遭了。

3. ContactsProvider2类探索

 在ContactsProvider2.java中有如下方法，可以匹配到uri=content://com.android.contacts/contacts/as_multi_vcard，代码：

 1 private AssetFileDescriptor openAssetFileInner(Uri uri, String mode) 2         throws FileNotFoundException { 3  4     final boolean writing = mode.contains("w"); 5  6     final SQLiteDatabase db = mDbHelper.get().getDatabase(writing); 7  8     int match = sUriMatcher.match(uri); 9     switch (match) {10 11         case CONTACTS_AS_MULTI_VCARD: { // 匹配content://com.android.contacts/contacts/as_multi_vcard12             final String lookupKeys = uri.getPathSegments().get(2);13             final String[] loopupKeyList = lookupKeys.split(":");14             final StringBuilder inBuilder = new StringBuilder();15             Uri queryUri = Contacts.CONTENT_URI;16             int index = 0;17 18             for (String lookupKey : loopupKeyList) {19                 if (index == 0) {20                     inBuilder.append("(");21                 } else {22                     inBuilder.append(",");23                 }24                 long contactId = lookupContactIdByLookupKey(db, lookupKey);25                 inBuilder.append(contactId);26                 index++;27             }28             inBuilder.append(')');29             final String selection = Contacts._ID + " IN " + inBuilder.toString();30 31             // When opening a contact as file, we pass back contents as a32             // vCard-encoded stream. We build into a local buffer first,33             // then pipe into MemoryFile once the exact size is known.34             final ByteArrayOutputStream localStream = new ByteArrayOutputStream();35             outputRawContactsAsVCard(queryUri, localStream, selection, null);36             return buildAssetFileDescriptor(localStream);37         }38     }39 }

这里首先通过lookupkey取得对应联系人的ID，然后再次生成查询条件selection，然后调用buildAssetFileDescriptor(localStream)方法，这个方法简单的对localStream做了一下封装，然后返回，那么localStream到底是怎么生成的？

进入outputRawContactsAsVCard(queryUri, localStream, selection, null)方法，代码如下：

 1 private void outputRawContactsAsVCard(Uri uri, OutputStream stream, 2         String selection, String[] selectionArgs) { 3     final Context context = this.getContext(); 4     int vcardconfig = VCardConfig.VCARD_TYPE_DEFAULT; 5     if(uri.getBooleanQueryParameter( 6             Contacts.QUERY_PARAMETER_VCARD_NO_PHOTO, false)) { 7         vcardconfig |= VCardConfig.FLAG_REFRAIN_IMAGE_EXPORT; 8     }     9     final VCardComposer composer =10             new VCardComposer(context, vcardconfig, false);  11     try {12         writer = new BufferedWriter(new OutputStreamWriter(stream));13         if (!composer.init(uri, selection, selectionArgs, null, rawContactsUri)) {   （1） 初始化composer14             Log.w(TAG, "Failed to init VCardComposer");15             return;16         }    17 18         while (!composer.isAfterLast()) {19             writer.write(composer.createOneEntry());    （2）真正编码联系人信息20         }    21     }22 }

（1）处代码对composer做了初始化，传入的参数有uri，selection等；（2）处调用createOneEntry()方法，做具体生成vcf的操作。

4. 进入VCardComposer类，这个类位于frameworks/opt/vcard/java/com/android/vcard/VCardComposer.java，当然，不同的厂商为了满足自己的需求或许会对这个类进行扩展甚至重写。

 1 public boolean init(final String selection, final String[] selectionArgs, final boolean isMyProfile, 2         final String sortOrder) { 3     if (mIsCallLogComposer) { 4         mCursor = mContentResolver.query(CallLog.Calls.CONTENT_URI, sCallLogProjection, 5                 selection, selectionArgs, sortOrder); 6     } else if (isMyProfile) { 7         mCursor = mContentResolver.query(Profile.CONTENT_URI, sContactsProjection, 8                 selection, selectionArgs, sortOrder); 9     } else {10         mCursor = mContentResolver.query(Contacts.CONTENT_URI, sContactsProjection,11                 selection, selectionArgs, sortOrder);12     }13 14     if (mCursor == null) {15         mErrorReason = FAILURE_REASON_FAILED_TO_GET_DATABASE_INFO;16         return false;17     }18 19     return true;20 }

init（）方法里面根据传入的参数，query数据库，得到要导出的联系人。看下面createOneEntry()方法：

 1 public boolean createOneEntry() { 2     if (mCursor == null || mCursor.isAfterLast()) { 3         mErrorReason = FAILURE_REASON_NOT_INITIALIZED; 4         return false; 5     } 6     String name = null; 7     String vcard; 8     try { 9         if (mIsCallLogComposer) {10             vcard = createOneCallLogEntryInternal();11         } else if (mIdColumn >= 0) {12             mContactsPhotoId = mCursor.getString(mCursor.getColumnIndex(Contacts.PHOTO_ID));13             vcard = createOneEntryInternal(mCursor.getString(mIdColumn));   （1）14         } else {15             Log.e(LOG_TAG, "Incorrect mIdColumn: " + mIdColumn);16             return false;17         }18     }19 20     return true;21 }

注意红色代码，进入createOneEntryInternal（）方法看看，代码如下：

 1 private String createOneEntryInternal(final String contactId, final boolean aForceEmpty) { 2     final Map<String, List<ContentValues>> contentValuesListMap = 3             new HashMap<String, List<ContentValues>>(); 4     final String selection = Data.CONTACT_ID + "=?"; 5     final String[] selectionArgs = new String[] {contactId}; 6     final Uri uri; 7     if (Long.valueOf(contactId)>Profile.MIN_ID) { 8         uri = RawContactsEntity.PROFILE_CONTENT_URI.buildUpon() 9                 .appendQueryParameter(ContactsContract.RawContactsEntity.FOR_EXPORT_ONLY, "1")10                 .build();11     } else {12         uri = RawContactsEntity.CONTENT_URI.buildUpon()13                 .appendQueryParameter(ContactsContract.RawContactsEntity.FOR_EXPORT_ONLY, "1")14                 .build();15     }16 17     appendStructuredNames(builder, contentValuesListMap);18     appendNickNames(builder, contentValuesListMap);19     appendPhones(builder, contentValuesListMap);20     appendEmails(builder, contentValuesListMap);21     appendPostals(builder, contentValuesListMap);22     appendIms(builder, contentValuesListMap);23     appendWebsites(builder, contentValuesListMap);24     appendBirthday(builder, contentValuesListMap);25     appendOrganizations(builder, contentValuesListMap);26     if (mNeedPhotoForVCard) {27         appendPhotos(builder, contentValuesListMap);28     }29     appendNotes(builder, contentValuesListMap);30     appendVCardLine(builder, VCARD_PROPERTY_END, VCARD_DATA_VCARD);31 32     return builder.toString();33 }

我们发现调用了好多append***（）系列的方法，而且传入的参数都是contentValuesListMap，以appendStructuredNames（）方法为例，其又调用了appendStructuredNamesInternal（）方法，代码如下：

 1 private void appendStructuredNamesInternal(final StringBuilder builder, 2         final List<ContentValues> contentValuesList) { 3     final String familyName = primaryContentValues 4             .getAsString(StructuredName.FAMILY_NAME); 5     final String middleName = primaryContentValues 6             .getAsString(StructuredName.MIDDLE_NAME); 7     final String givenName = primaryContentValues 8             .getAsString(StructuredName.GIVEN_NAME); 9     final String prefix = primaryContentValues10             .getAsString(StructuredName.PREFIX);11     final String suffix = primaryContentValues12             .getAsString(StructuredName.SUFFIX);13     final String displayName = primaryContentValues14             .getAsString(StructuredName.DISPLAY_NAME);15 16     if (!TextUtils.isEmpty(familyName) || !TextUtils.isEmpty(givenName)) {17         final String encodedFamily;18         final String encodedGiven;19         final String encodedMiddle;20         final String encodedPrefix;21         final String encodedSuffix;22 23         if (reallyUseQuotedPrintableToName) {   （1）24             encodedFamily = encodeQuotedPrintable(familyName);25             encodedGiven = encodeQuotedPrintable(givenName);26             encodedMiddle = encodeQuotedPrintable(middleName);27             encodedPrefix = encodeQuotedPrintable(prefix);28             encodedSuffix = encodeQuotedPrintable(suffix);29         } else {30             encodedFamily = escapeCharacters(familyName);31             encodedGiven = escapeCharacters(givenName);32             encodedMiddle = escapeCharacters(middleName);33             encodedPrefix = escapeCharacters(prefix);34             encodedSuffix = escapeCharacters(suffix);35         }36 37         // N property. This order is specified by vCard spec and does not depend on countries.38         builder.append(VCARD_PROPERTY_NAME);  // VCARD_PROPERTY_NAME = "N"39         if (shouldAppendCharsetAttribute(Arrays.asList(40                 familyName, givenName, middleName, prefix, suffix))) {41             builder.append(VCARD_ATTR_SEPARATOR);42             builder.append(mVCardAttributeCharset);43         }44         if (reallyUseQuotedPrintableToName) {45             builder.append(VCARD_ATTR_SEPARATOR);46             builder.append(VCARD_ATTR_ENCODING_QP);47         }48 49         builder.append(VCARD_DATA_SEPARATOR);  // VCARD_DATA_SEPARATOR = ":";50         builder.append(encodedFamily);51         builder.append(VCARD_ITEM_SEPARATOR);52         builder.append(encodedGiven);53         builder.append(VCARD_ITEM_SEPARATOR);54         builder.append(encodedMiddle);55         builder.append(VCARD_ITEM_SEPARATOR);56         builder.append(encodedPrefix);57         builder.append(VCARD_ITEM_SEPARATOR);58         builder.append(encodedSuffix);59         builder.append(VCARD_COL_SEPARATOR);60 61         final String fullname = displayName;62         final boolean reallyUseQuotedPrintableToFullname =63             mUsesQPToPrimaryProperties &&64             !VCardUtils.containsOnlyNonCrLfPrintableAscii(fullname);65 66         final String encodedFullname;67         if (reallyUseQuotedPrintableToFullname) {68             encodedFullname = encodeQuotedPrintable(fullname);  // VCARD_ATTR_ENCODING_QP = "ENCODING=QUOTED-PRINTABLE"69         } else if (!mIsDoCoMo) {70             encodedFullname = escapeCharacters(fullname);71         } else {72             encodedFullname = removeCrLf(fullname);73         }74 75         // FN property76         builder.append(VCARD_PROPERTY_FULL_NAME);  // VCARD_PROPERTY_FULL_NAME = "FN"77         if (shouldAppendCharsetAttribute(fullname)) {78             builder.append(VCARD_ATTR_SEPARATOR);79             builder.append(mVCardAttributeCharset);80         }81         if (reallyUseQuotedPrintableToFullname) {82             builder.append(VCARD_ATTR_SEPARATOR);83             builder.append(VCARD_ATTR_ENCODING_QP);84         }85         builder.append(VCARD_DATA_SEPARATOR);86         builder.append(encodedFullname);87         builder.append(VCARD_COL_SEPARATOR);88     }89 }

这个方法很长，我只是截取了其中一部分我们分析需要的代码，该方法的作用如下：

1. 获取姓名的各个部分，并对其编码。

2. （1）处判断， 如果姓名是中文，那么if (reallyUseQuotedPrintableToName) 成立。

看红色代码，就是.vcf文件中信息编码的header部分，比如“N”，“FN”， “ENCODING=QUOTED-PRINTABLE”等，如下：

此联系人姓名：大卫 号码：9999999

1 BEGIN:VCARD2 VERSION:2.13 N;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:;=E5=A4=A7=E5=8D=AB;;;  //姓名部分4 FN;CHARSET=UTF-8;ENCODING=QUOTED-PRINTABLE:=E5=A4=A7=E5=8D=AB  //姓名部分5 TEL;HOME;VOICE:99999996 END:VCARD

现在应该清楚了吧，其实.vcf编码说白了就是组合而已，将姓名，号码等信息取出来，然后和相应的header组合在一起，就够成了一个符合标准的.vcf信息。

在前一篇文章中我们提到过，像电话号码、email等信息是原文保存的，如果姓名是英语，也是原文保存，但是中文姓名比较麻烦，就像这个联系人一样，“大卫”被编码成“E5=A4=A7=E5=8D=AB”，那这个编码是怎么回事呢？我们还得看看encodedFamily = encodeQuotedPrintable(familyName)，进入encodeQuotedPrintable(familyName)方法，代码如下：

 1 private String encodeQuotedPrintable(String str) { 2     if (TextUtils.isEmpty(str)) { 3         return ""; 4     } 5     { 6         // Replace "\n" and "\r" with "\r\n". 7         StringBuilder tmpBuilder = new StringBuilder(); 8         int length = str.length(); 9         for (int i = 0; i < length; i++) {10             char ch = str.charAt(i);11             if (ch == '\r') {12                 if (i + 1 < length && str.charAt(i + 1) == '\n') {13                     i++;14                 }15                 tmpBuilder.append("\r\n");16             } else if (ch == '\n') {17                 tmpBuilder.append("\r\n");18             } else {19                 tmpBuilder.append(ch);20             }21         }22         str = tmpBuilder.toString();23     }24 25     final StringBuilder tmpBuilder = new StringBuilder();26     int index = 0;27     int lineCount = 0;28     byte[] strArray = null;29 30     try {31         strArray = str.getBytes(mCharsetString);  （1）32     }33     while (index < strArray.length) {34         tmpBuilder.append(String.format("=%02X", strArray[index]));  （2）35         Log.d("D44", "tmpBuilder = " + tmpBuilder.toString());36         index += 1;37         lineCount += 3;38 39         if (lineCount >= QUATED_PRINTABLE_LINE_MAX) {40             // Specification requires CRLF must be inserted before the41             // length of the line42             // becomes more than 76.43             // Assuming that the next character is a multi-byte character,44             // it will become45             // 6 bytes.46             // 76 - 6 - 3 = 6747             tmpBuilder.append("=\r\n");48             lineCount = 0;49         }50     }51 52     return tmpBuilder.toString();53 }

（1）处代码调用str.getBytes(mCharsetString)，返回一个字符串的byte数组，编码格式是“UTF-8”；

（2）处代码用到了一个循环，对每一个byte进行编码，编码姓名为“大卫”的log如下：

1 D/D44     (32766): str = 大卫2 D/D44     (32766): 1str = 大卫3 D/D44     (32766): mCharsetString = UTF-84 D/D44     (32766): tmpBuilder = =E55 D/D44     (32766): tmpBuilder = =E5=A46 D/D44     (32766): tmpBuilder = =E5=A4=A77 D/D44     (32766): tmpBuilder = =E5=A4=A7=E58 D/D44     (32766): tmpBuilder = =E5=A4=A7=E5=8D9 D/D44     (32766): tmpBuilder = =E5=A4=A7=E5=8D=AB

传进来的familyName是“大卫”，编码的过程如log所示。

OK，现在我们终于明白了是如何生成.vcf文件的了，对于可以用英文字符表示的信息，加header信息，原文保存；对于中文或者其他语言表示的信息，进行编码，编码规则如下：

1 String str = "大卫";2 byte[] strArray = null;3 strArray = str.getBytes("UTF-8");4 int index = 0;5 while (index < strArray.length) {6     System.out.println(String.format("=%02X", strArray[index]));7     index++;8 }

这段代码是我自己写的Demo，编码规则很简单，是不是？最关键的一句是“String.format(“=%02X”, strArray[index])”，至于这个方法的用法，请问度娘～

现在剩最后一个问题，联系人头像是怎么编码的呢？代码如下：

 1     private void appendPhotos(final StringBuilder builder, 2             final Map<String, List<ContentValues>> contentValuesListMap) { 3         final List<ContentValues> contentValuesList = contentValuesListMap 4                 .get(Photo.CONTENT_ITEM_TYPE); 5         if (contentValuesList != null) { 6             for (ContentValues contentValues : contentValuesList) { 7  8                 // When photo id don't equal the photo id showned in contact, 9                 // the photo data don't add to VCard.10                 if(mContactsPhotoId != null &&11                         (!mContactsPhotoId.equals(contentValues.getAsString(Data._ID)))){12                     continue;13                 }14 15                 byte[] data = contentValues.getAsByteArray(Photo.PHOTO);  （1）16                 if (data == null) {17                     continue;18                 }19                 String photoType;20                 // Use some heuristics for guessing the format of the image.21                 // TODO: there should be some general API for detecting the file format.22                 if (data.length >= 3 && data[0] == 'G' && data[1] == 'I'23                         && data[2] == 'F') {24                     photoType = "GIF";25                 } else if (data.length >= 4 && data[0] == (byte) 0x8926                         && data[1] == 'P' && data[2] == 'N' && data[3] == 'G') {27                     // PNG is not officially supported by vcard-2.1 and many FOMA phone can't decode PNG.28                     // To solve IOT issue, convert PNG files to JPEG.29                     photoType = "PNG";30                 } else if (data.length >= 2 && data[0] == (byte) 0xff31                         && data[1] == (byte) 0xd8) {32                     photoType = "JPEG";33                 } else {34                     Log.d(LOG_TAG, "Unknown photo type. Ignore.");35                     continue;36                 }37                 byte[] newData = convertToSmallJpg(data, photoType);38                 if (newData != null) {39                     data = newData;40                     photoType = "JPEG";41                 }42                 final String photoString = VCardUtils.encodeBase64(data);  （2）43                 if (photoString.length() > 0) {44                     appendVCardPhotoLine(builder, photoString, "TYPE=" + photoType);  （3） 添加TYPE信息45                 }46             }47         }48     }

看3处红色代码：

（1）得到头像的byte数组；

（2）将byte数组编码，并返回为String类型；

（3）保存为.vcf信息，比如PHOTO;ENCODING=BASE64;TYPE=JPEG等头信息。

VCardUtils.encodeBase64(data)方法代码如下：

 1 private static final char[] ENCODE64 = { 2         'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P', 3         'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f', 4         'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v', 5         'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/' 6     }; 7  8     static public String encodeBase64(byte[] data) { 9         if (data == null) {10             return "";11         }12 13         char[] charBuffer = new char[(data.length + 2) / 3 * 4];14         int position = 0;15         int _3byte = 0;16         for (int i=0; i<data.length-2; i+=3) {17             _3byte = ((data[i] & 0xFF) << 16) + ((data[i+1] & 0xFF) << 8) + (data[i+2] & 0xFF);18             charBuffer[position++] = ENCODE64[_3byte >> 18];19             charBuffer[position++] = ENCODE64[(_3byte >> 12) & 0x3F];20             charBuffer[position++] = ENCODE64[(_3byte >>  6) & 0x3F];21             charBuffer[position++] = ENCODE64[_3byte & 0x3F];22         }23         switch(data.length % 3) {24         case 1: // [111111][11 0000][0000 00][000000]25             _3byte = ((data[data.length-1] & 0xFF) << 16);26             charBuffer[position++] = ENCODE64[_3byte >> 18];27             charBuffer[position++] = ENCODE64[(_3byte >> 12) & 0x3F];28             charBuffer[position++] = PAD;29             charBuffer[position++] = PAD;30             break;31         case 2: // [111111][11 1111][1111 00][000000]32             _3byte = ((data[data.length-2] & 0xFF) << 16) + ((data[data.length-1] & 0xFF) << 8);33             charBuffer[position++] = ENCODE64[_3byte >> 18];34             charBuffer[position++] = ENCODE64[(_3byte >> 12) & 0x3F];35             charBuffer[position++] = ENCODE64[(_3byte >>  6) & 0x3F];36             charBuffer[position++] = PAD;37             break;38         }39 40         return new String(charBuffer);41     }

这里就不做分析了，（3）处的appendVCardPhotoLine()方法代码如下：

 1 private void appendVCardPhotoLine(final StringBuilder builder, 2             final String encodedData, final String photoType) { 3         StringBuilder tmpBuilder = new StringBuilder(); 4         tmpBuilder.append(VCARD_PROPERTY_PHOTO);  // VCARD_PROPERTY_PHOTO = "PHOTO" 5         tmpBuilder.append(VCARD_ATTR_SEPARATOR); 6         if (mIsV30) { 7             tmpBuilder.append(VCARD_ATTR_ENCODING_BASE64_V30); 8         } else { 9             tmpBuilder.append(VCARD_ATTR_ENCODING_BASE64_V21);10         }11         tmpBuilder.append(VCARD_ATTR_SEPARATOR);12         appendTypeAttribute(tmpBuilder, photoType);13         tmpBuilder.append(VCARD_DATA_SEPARATOR);14         tmpBuilder.append(encodedData);15 16         final String tmpStr = tmpBuilder.toString();17         tmpBuilder = new StringBuilder();18         int lineCount = 0;19         int length = tmpStr.length();20         for (int i = 0; i < length; i++) {21             tmpBuilder.append(tmpStr.charAt(i));22             lineCount++;23             if (lineCount > BASE64_LINE_MAX) {24                 tmpBuilder.append(VCARD_COL_SEPARATOR);25                 tmpBuilder.append(VCARD_WS);26                 lineCount = 0;27             }28         }29         builder.append(tmpBuilder.toString());30         builder.append(VCARD_COL_SEPARATOR);31         builder.append(VCARD_COL_SEPARATOR);32     }

红色代码，标识的就是photo，至于其他的，和姓名类似，就不展开说了。

OK，终于结束了，战线太长了，甚至有点凌乱，不过希望读者沿着主线看，不要太在乎细节，比如那个方法是怎么调用的或者这个参数是什么时候初始化的。

最后两个方法，没有仔细讲，感兴趣的读者自己去看吧，原理在前面就说清楚了。

现在回答一下上一篇文章中（http://www.cnblogs.com/wlrhnh/p/3515269.html）遗留的问题，就是如何解码的问题，我们现在知道如何编码，那如何解码还不简单吗？呵呵

最后将VCardComposer.java代码贴上来，感兴趣的可以自己看看。

  1 /*  2  * Copyright (C) 2009 The Android Open Source Project  3  *  4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not  5  * use this file except in compliance with the License. You may obtain a copy of  6  * the License at  7  *  8  * http://www.apache.org/licenses/LICENSE-2.0  9  * 10  * Unless required by applicable law or agreed to in writing, software 11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13  * License for the specific language governing permissions and limitations under 14  * the License. 15  */ 16 package com.android.vcard; 17  18 import android.content.ContentResolver; 19 import android.content.ContentValues; 20 import android.content.Context; 21 import android.content.Entity; 22 import android.content.Entity.NamedContentValues; 23 import android.content.EntityIterator; 24 import android.database.Cursor; 25 import android.database.sqlite.SQLiteException; 26 import android.net.Uri; 27 import android.provider.ContactsContract.CommonDataKinds.Email; 28 import android.provider.ContactsContract.CommonDataKinds.Event; 29 import android.provider.ContactsContract.CommonDataKinds.Im; 30 import android.provider.ContactsContract.CommonDataKinds.Nickname; 31 import android.provider.ContactsContract.CommonDataKinds.Note; 32 import android.provider.ContactsContract.CommonDataKinds.Organization; 33 import android.provider.ContactsContract.CommonDataKinds.Phone; 34 import android.provider.ContactsContract.CommonDataKinds.Photo; 35 import android.provider.ContactsContract.CommonDataKinds.Relation; 36 import android.provider.ContactsContract.CommonDataKinds.SipAddress; 37 import android.provider.ContactsContract.CommonDataKinds.StructuredName; 38 import android.provider.ContactsContract.CommonDataKinds.StructuredPostal; 39 import android.provider.ContactsContract.CommonDataKinds.Website; 40 import android.provider.ContactsContract.Contacts; 41 import android.provider.ContactsContract.Data; 42 import android.provider.ContactsContract.RawContacts; 43 import android.provider.ContactsContract.RawContactsEntity; 44 import android.provider.ContactsContract; 45 import android.text.TextUtils; 46 import android.util.Log; 47  48 import java.lang.reflect.InvocationTargetException; 49 import java.lang.reflect.Method; 50 import java.util.ArrayList; 51 import java.util.HashMap; 52 import java.util.List; 53 import java.util.Map; 54  55 /** 56  * <p> 57  * The class for composing vCard from Contacts information. 58  * </p> 59  * <p> 60  * Usually, this class should be used like this. 61  * </p> 62  * <pre class="prettyprint">VCardComposer composer = null; 63  * try { 64  *     composer = new VCardComposer(context); 65  *     composer.addHandler( 66  *             composer.new HandlerForOutputStream(outputStream)); 67  *     if (!composer.init()) { 68  *         // Do something handling the situation. 69  *         return; 70  *     } 71  *     while (!composer.isAfterLast()) { 72  *         if (mCanceled) { 73  *             // Assume a user may cancel this operation during the export. 74  *             return; 75  *         } 76  *         if (!composer.createOneEntry()) { 77  *             // Do something handling the error situation. 78  *             return; 79  *         } 80  *     } 81  * } finally { 82  *     if (composer != null) { 83  *         composer.terminate(); 84  *     } 85  * }</pre> 86  * <p> 87  * Users have to manually take care of memory efficiency. Even one vCard may contain 88  * image of non-trivial size for mobile devices. 89  * </p> 90  * <p> 91  * {@link VCardBuilder} is used to build each vCard. 92  * </p> 93  */ 94 public class VCardComposer { 95     private static final String LOG_TAG = "VCardComposer"; 96     private static final boolean DEBUG = false; 97  98     public static final String FAILURE_REASON_FAILED_TO_GET_DATABASE_INFO = 99         "Failed to get database information";100 101     public static final String FAILURE_REASON_NO_ENTRY =102         "There's no exportable in the database";103 104     public static final String FAILURE_REASON_NOT_INITIALIZED =105         "The vCard composer object is not correctly initialized";106 107     /** Should be visible only from developers... (no need to translate, hopefully) */108     public static final String FAILURE_REASON_UNSUPPORTED_URI =109         "The Uri vCard composer received is not supported by the composer.";110 111     public static final String NO_ERROR = "No error";112 113     // Strictly speaking, "Shift_JIS" is the most appropriate, but we use upper version here,114     // since usual vCard devices for Japanese devices already use it.115     private static final String SHIFT_JIS = "SHIFT_JIS";116     private static final String UTF_8 = "UTF-8";117 118     private static final String SIM_NAME_1 = "SIM1";119     private static final String SIM_NAME_2 = "SIM2";120     private static final String SIM_NAME_3 = "SIM3";121     private static final String SIM_NAME = "SIM";122 123     private static final Map<Integer, String> sImMap;124 125     static {126         sImMap = new HashMap<Integer, String>();127         sImMap.put(Im.PROTOCOL_AIM, VCardConstants.PROPERTY_X_AIM);128         sImMap.put(Im.PROTOCOL_MSN, VCardConstants.PROPERTY_X_MSN);129         sImMap.put(Im.PROTOCOL_YAHOO, VCardConstants.PROPERTY_X_YAHOO);130         sImMap.put(Im.PROTOCOL_ICQ, VCardConstants.PROPERTY_X_ICQ);131         sImMap.put(Im.PROTOCOL_JABBER, VCardConstants.PROPERTY_X_JABBER);132         sImMap.put(Im.PROTOCOL_SKYPE, VCardConstants.PROPERTY_X_SKYPE_USERNAME);133         // We don't add Google talk here since it has to be handled separately.134     }135 136     private final int mVCardType;137     private final ContentResolver mContentResolver;138 139     private final boolean mIsDoCoMo;140     /**141      * Used only when {@link #mIsDoCoMo} is true. Set to true when the first vCard for DoCoMo142      * vCard is emitted.143      */144     private boolean mFirstVCardEmittedInDoCoMoCase;145 146     private Cursor mCursor;147     private boolean mCursorSuppliedFromOutside;148     private int mIdColumn;149     private Uri mContentUriForRawContactsEntity;150 151     private final String mCharset;152 153     private String mCurrentContactID = null;154 155     private boolean mInitDone;156     private String mErrorReason = NO_ERROR;157 158     /**159      * Set to false when one of {@link #init()} variants is called, and set to true when160      * {@link #terminate()} is called. Initially set to true.161      */162     private boolean mTerminateCalled = true;163 164     private static final String[] sContactsProjection = new String[] {165         Contacts._ID,166     };167 168     public VCardComposer(Context context) {169         this(context, VCardConfig.VCARD_TYPE_DEFAULT, null, true);170     }171 172     /**173      * The variant which sets charset to null and sets careHandlerErrors to true.174      */175     public VCardComposer(Context context, int vcardType) {176         this(context, vcardType, null, true);177     }178 179     public VCardComposer(Context context, int vcardType, String charset) {180         this(context, vcardType, charset, true);181     }182 183     /**184      * The variant which sets charset to null.185      */186     public VCardComposer(final Context context, final int vcardType,187             final boolean careHandlerErrors) {188         this(context, vcardType, null, careHandlerErrors);189     }190 191     /**192      * Constructs for supporting call log entry vCard composing.193      *194      * @param context Context to be used during the composition.195      * @param vcardType The type of vCard, typically available via {@link VCardConfig}.196      * @param charset The charset to be used. Use null when you don't need the charset.197      * @param careHandlerErrors If true, This object returns false everytime198      */199     public VCardComposer(final Context context, final int vcardType, String charset,200             final boolean careHandlerErrors) {201         this(context, context.getContentResolver(), vcardType, charset, careHandlerErrors);202     }203 204     /**205      * Just for testing for now.206      * @param resolver {@link ContentResolver} which used by this object.207      * @hide208      */209     public VCardComposer(final Context context, ContentResolver resolver,210             final int vcardType, String charset, final boolean careHandlerErrors) {211         // Not used right now212         // mContext = context;213         mVCardType = vcardType;214         mContentResolver = resolver;215 216         mIsDoCoMo = VCardConfig.isDoCoMo(vcardType);217 218         charset = (TextUtils.isEmpty(charset) ? VCardConfig.DEFAULT_EXPORT_CHARSET : charset);219         final boolean shouldAppendCharsetParam = !(220                 VCardConfig.isVersion30(vcardType) && UTF_8.equalsIgnoreCase(charset));221 222         if (mIsDoCoMo || shouldAppendCharsetParam) {223             // TODO: clean up once we're sure CharsetUtils are really unnecessary any more.224             if (SHIFT_JIS.equalsIgnoreCase(charset)) {225                 /*if (mIsDoCoMo) {226                     try {227                         charset = CharsetUtils.charsetForVendor(SHIFT_JIS, "docomo").name();228                     } catch (UnsupportedCharsetException e) {229                         Log.e(LOG_TAG,230                                 "DoCoMo-specific SHIFT_JIS was not found. "231                                 + "Use SHIFT_JIS as is.");232                         charset = SHIFT_JIS;233                     }234                 } else {235                     try {236                         charset = CharsetUtils.charsetForVendor(SHIFT_JIS).name();237                     } catch (UnsupportedCharsetException e) {238                         // Log.e(LOG_TAG,239                         // "Career-specific SHIFT_JIS was not found. "240                         // + "Use SHIFT_JIS as is.");241                         charset = SHIFT_JIS;242                     }243                 }*/244                 mCharset = charset;245             } else {246                 /* Log.w(LOG_TAG,247                         "The charset \"" + charset + "\" is used while "248                         + SHIFT_JIS + " is needed to be used."); */249                 if (TextUtils.isEmpty(charset)) {250                     mCharset = SHIFT_JIS;251                 } else {252                     /*253                     try {254                         charset = CharsetUtils.charsetForVendor(charset).name();255                     } catch (UnsupportedCharsetException e) {256                         Log.i(LOG_TAG,257                                 "Career-specific \"" + charset + "\" was not found (as usual). "258                                 + "Use it as is.");259                     }*/260                     mCharset = charset;261                 }262             }263         } else {264             if (TextUtils.isEmpty(charset)) {265                 mCharset = UTF_8;266             } else {267                 /*try {268                     charset = CharsetUtils.charsetForVendor(charset).name();269                 } catch (UnsupportedCharsetException e) {270                     Log.i(LOG_TAG,271                             "Career-specific \"" + charset + "\" was not found (as usual). "272                             + "Use it as is.");273                 }*/274                 mCharset = charset;275             }276         }277 278         Log.d(LOG_TAG, "Use the charset \"" + mCharset + "\"");279     }280 281     /**282      * Initializes this object using default {@link Contacts#CONTENT_URI}.283      *284      * You can call this method or a variant of this method just once. In other words, you cannot285      * reuse this object.286      *287      * @return Returns true when initialization is successful and all the other288      *          methods are available. Returns false otherwise.289      */290     public boolean init() {291         return init(null, null);292     }293 294     /**295      * Special variant of init(), which accepts a Uri for obtaining {@link RawContactsEntity} from296      * {@link ContentResolver} with {@link Contacts#_ID}.297      * <code>298      * String selection = Data.CONTACT_ID + "=?";299      * String[] selectionArgs = new String[] {contactId};300      * Cursor cursor = mContentResolver.query(301      *         contentUriForRawContactsEntity, null, selection, selectionArgs, null)302      * </code>303      *304      * You can call this method or a variant of this method just once. In other words, you cannot305      * reuse this object.306      *307      * @deprecated Use {@link #init(Uri, String[], String, String[], String, Uri)} if you really308      * need to change the default Uri.309      */310     @Deprecated311     public boolean initWithRawContactsEntityUri(Uri contentUriForRawContactsEntity) {312         return init(Contacts.CONTENT_URI, sContactsProjection, null, null, null,313                 contentUriForRawContactsEntity);314     }315 316     /**317      * Initializes this object using default {@link Contacts#CONTENT_URI} and given selection318      * arguments.319      */320     public boolean init(final String selection, final String[] selectionArgs) {321         return init(Contacts.CONTENT_URI, sContactsProjection, selection, selectionArgs,322                 null, null);323     }324 325     /**326      * Note that this is unstable interface, may be deleted in the future.327      */328     public boolean init(final Uri contentUri, final String selection,329             final String[] selectionArgs, final String sortOrder) {330         return init(contentUri, sContactsProjection, selection, selectionArgs, sortOrder, null);331     }332 333     /**334      * @param contentUri Uri for obtaining the list of contactId. Used with335      * {@link ContentResolver#query(Uri, String[], String, String[], String)}336      * @param selection selection used with337      * {@link ContentResolver#query(Uri, String[], String, String[], String)}338      * @param selectionArgs selectionArgs used with339      * {@link ContentResolver#query(Uri, String[], String, String[], String)}340      * @param sortOrder sortOrder used with341      * {@link ContentResolver#query(Uri, String[], String, String[], String)}342      * @param contentUriForRawContactsEntity Uri for obtaining entries relevant to each343      * contactId.344      * Note that this is an unstable interface, may be deleted in the future.345      */346     public boolean init(final Uri contentUri, final String selection,347             final String[] selectionArgs, final String sortOrder,348             final Uri contentUriForRawContactsEntity) {349         return init(contentUri, sContactsProjection, selection, selectionArgs, sortOrder,350                 contentUriForRawContactsEntity);351     }352 353     /**354      * A variant of init(). Currently just for testing. Use other variants for init().355      *356      * First we'll create {@link Cursor} for the list of contactId.357      *358      * <code>359      * Cursor cursorForId = mContentResolver.query(360      *         contentUri, projection, selection, selectionArgs, sortOrder);361      * </code>362      *363      * After that, we'll obtain data for each contactId in the list.364      *365      * <code>366      * Cursor cursorForContent = mContentResolver.query(367      *         contentUriForRawContactsEntity, null,368      *         Data.CONTACT_ID + "=?", new String[] {contactId}, null)369      * </code>370      *371      * {@link #createOneEntry()} or its variants let the caller obtain each entry from372      * <code>cursorForContent</code> above.373      *374      * @param contentUri Uri for obtaining the list of contactId. Used with375      * {@link ContentResolver#query(Uri, String[], String, String[], String)}376      * @param projection projection used with377      * {@link ContentResolver#query(Uri, String[], String, String[], String)}378      * @param selection selection used with379      * {@link ContentResolver#query(Uri, String[], String, String[], String)}380      * @param selectionArgs selectionArgs used with381      * {@link ContentResolver#query(Uri, String[], String, String[], String)}382      * @param sortOrder sortOrder used with383      * {@link ContentResolver#query(Uri, String[], String, String[], String)}384      * @param contentUriForRawContactsEntity Uri for obtaining entries relevant to each385      * contactId.386      * @return true when successful387      *388      * @hide389      */390     public boolean init(final Uri contentUri, final String[] projection,391             final String selection, final String[] selectionArgs,392             final String sortOrder, Uri contentUriForRawContactsEntity) {393         if (!ContactsContract.AUTHORITY.equals(contentUri.getAuthority())) {394             if (DEBUG) Log.d(LOG_TAG, "Unexpected contentUri: " + contentUri);395             mErrorReason = FAILURE_REASON_UNSUPPORTED_URI;396             return false;397         }398 399         if (!initInterFirstPart(contentUriForRawContactsEntity)) {400             return false;401         }402         if (!initInterCursorCreationPart(contentUri, projection, selection, selectionArgs,403                 sortOrder)) {404             return false;405         }406         if (!initInterMainPart()) {407             return false;408         }409         return initInterLastPart();410     }411 412     /**413      * Just for testing for now. Do not use.414      * @hide415      */416     public boolean init(Cursor cursor) {417         if (!initInterFirstPart(null)) {418             return false;419         }420         mCursorSuppliedFromOutside = true;421         mCursor = cursor;422         if (!initInterMainPart()) {423             return false;424         }425         return initInterLastPart();426     }427 428     private boolean initInterFirstPart(Uri contentUriForRawContactsEntity) {429         mContentUriForRawContactsEntity =430                 (contentUriForRawContactsEntity != null ? contentUriForRawContactsEntity :431                         RawContactsEntity.CONTENT_URI);432         if (mInitDone) {433             Log.e(LOG_TAG, "init() is already called");434             return false;435         }436         return true;437     }438 439     private boolean initInterCursorCreationPart(440             final Uri contentUri, final String[] projection,441             final String selection, final String[] selectionArgs, final String sortOrder) {442         mCursorSuppliedFromOutside = false;443         mCursor = mContentResolver.query(444                 contentUri, projection, selection, selectionArgs, sortOrder);445         if (mCursor == null) {446             Log.e(LOG_TAG, String.format("Cursor became null unexpectedly"));447             mErrorReason = FAILURE_REASON_FAILED_TO_GET_DATABASE_INFO;448             return false;449         }450         return true;451     }452 453     private boolean initInterMainPart() {454         if (mCursor.getCount() == 0 || !mCursor.moveToFirst()) {455             if (DEBUG) {456                 Log.d(LOG_TAG,457                     String.format("mCursor has an error (getCount: %d): ", mCursor.getCount()));458             }459             closeCursorIfAppropriate();460             return false;461         }462         mIdColumn = mCursor.getColumnIndex(Contacts._ID);463         return mIdColumn >= 0;464     }465 466     private boolean initInterLastPart() {467         mInitDone = true;468         mTerminateCalled = false;469         return true;470     }471 472     /**473      * @return a vCard string.474      */475     public String createOneEntry() {476         return createOneEntry(null);477     }478 479     /**480      * @hide481      */482     public String createOneEntry(Method getEntityIteratorMethod) {483         if (mIsDoCoMo && !mFirstVCardEmittedInDoCoMoCase) {484             mFirstVCardEmittedInDoCoMoCase = true;485             // Previously we needed to emit empty data for this specific case, but actually486             // this doesn't work now, as resolver doesn't return any data with "-1" contactId.487             // TODO: re-introduce or remove this logic. Needs to modify unit test when we488             // re-introduce the logic.489             // return createOneEntryInternal("-1", getEntityIteratorMethod);490         }491 492         final String vcard = createOneEntryInternal(mCursor.getString(mIdColumn),493                 getEntityIteratorMethod);494         if (!mCursor.moveToNext()) {495             Log.e(LOG_TAG, "Cursor#moveToNext() returned false");496         }497         return vcard;498     }499 500     private String createOneEntryInternal(final String contactId,501             final Method getEntityIteratorMethod) {502         final Map<String, List<ContentValues>> contentValuesListMap =503                 new HashMap<String, List<ContentValues>>();504         // The resolver may return the entity iterator with no data. It is possible.505         // e.g. If all the data in the contact of the given contact id are not exportable ones,506         //      they are hidden from the view of this method, though contact id itself exists.507         EntityIterator entityIterator = null;508         try {509             final Uri uri = mContentUriForRawContactsEntity;510             final String selection = Data.CONTACT_ID + "=?";511             final String[] selectionArgs = new String[] {contactId};512             if (getEntityIteratorMethod != null) {513                 // Please note that this branch is executed by unit tests only514                 try {515                     entityIterator = (EntityIterator)getEntityIteratorMethod.invoke(null,516                             mContentResolver, uri, selection, selectionArgs, null);517                 } catch (IllegalArgumentException e) {518                     Log.e(LOG_TAG, "IllegalArgumentException has been thrown: " +519                             e.getMessage());520                 } catch (IllegalAccessException e) {521                     Log.e(LOG_TAG, "IllegalAccessException has been thrown: " +522                             e.getMessage());523                 } catch (InvocationTargetException e) {524                     Log.e(LOG_TAG, "InvocationTargetException has been thrown: ", e);525                     throw new RuntimeException("InvocationTargetException has been thrown");526                 }527             } else {528                 entityIterator = RawContacts.newEntityIterator(mContentResolver.query(529                         uri, null, selection, selectionArgs, null));530             }531 532             if (entityIterator == null) {533                 Log.e(LOG_TAG, "EntityIterator is null");534                 return "";535             }536 537             if (!entityIterator.hasNext()) {538                 Log.w(LOG_TAG, "Data does not exist. contactId: " + contactId);539                 return "";540             }541 542             while (entityIterator.hasNext()) {543                 Entity entity = entityIterator.next();544                 for (NamedContentValues namedContentValues : entity.getSubValues()) {545                     ContentValues contentValues = namedContentValues.values;546                     String key = contentValues.getAsString(Data.MIMETYPE);547                     if (key != null) {548                         List<ContentValues> contentValuesList =549                                 contentValuesListMap.get(key);550                         if (contentValuesList == null) {551                             contentValuesList = new ArrayList<ContentValues>();552                             contentValuesListMap.put(key, contentValuesList);553                         }554                         contentValuesList.add(contentValues);555                     }556                 }557             }558         } finally {559             if (entityIterator != null) {560                 entityIterator.close();561             }562         }563         mCurrentContactID = contactId;564 565         return buildVCard(contentValuesListMap);566     }567 568     private VCardPhoneNumberTranslationCallback mPhoneTranslationCallback;569     /**570      * <p>571      * Set a callback for phone number formatting. It will be called every time when this object572      * receives a phone number for printing.573      * </p>574      * <p>575      * When this is set {@link VCardConfig#FLAG_REFRAIN_PHONE_NUMBER_FORMATTING} will be ignored576      * and the callback should be responsible for everything about phone number formatting.577      * </p>578      * <p>579      * Caution: This interface will change. Please don't use without any strong reason.580      * </p>581      */582     public void setPhoneNumberTranslationCallback(VCardPhoneNumberTranslationCallback callback) {583         mPhoneTranslationCallback = callback;584     }585 586     /** return whether the contact's account type is sim account */587     private boolean isSimcardAccount(String contactid) {588         boolean isSimAccount = false;589         Cursor cursor = null;590         try {591             cursor = mContentResolver.query(RawContacts.CONTENT_URI,592                     new String[] { RawContacts.ACCOUNT_NAME },593                     RawContacts.CONTACT_ID + "=?", new String[] { contactid },594                     null);595             if (null != cursor && 0 != cursor.getCount() && cursor.moveToFirst()) {596                 String accountName = cursor.getString(597                         cursor.getColumnIndex(RawContacts.ACCOUNT_NAME));598                 if (SIM_NAME.equals(accountName) || SIM_NAME_1.equals(accountName) ||599                         SIM_NAME_2.equals(accountName) || SIM_NAME_3.equals(accountName)) {600                     isSimAccount = true;601                 }602             }603         } finally {604             if (null != cursor) {605                 cursor.close();606             }607         }608 609         return isSimAccount;610     }611 612     /**613      * Builds and returns vCard using given map, whose key is CONTENT_ITEM_TYPE defined in614      * {ContactsContract}. Developers can override this method to customize the output.615      */616     public String buildVCard(final Map<String, List<ContentValues>> contentValuesListMap) {617         if (contentValuesListMap == null) {618             Log.e(LOG_TAG, "The given map is null. Ignore and return empty String");619             return "";620         } else {621             final VCardBuilder builder = new VCardBuilder(mVCardType, mCharset);622             builder.appendNameProperties(contentValuesListMap.get(StructuredName.CONTENT_ITEM_TYPE))623                     .appendNickNames(contentValuesListMap.get(Nickname.CONTENT_ITEM_TYPE))624                     .appendPhones(contentValuesListMap.get(Phone.CONTENT_ITEM_TYPE),625                             mPhoneTranslationCallback)626                     .appendEmails(contentValuesListMap.get(Email.CONTENT_ITEM_TYPE))627                     .appendPostals(contentValuesListMap.get(StructuredPostal.CONTENT_ITEM_TYPE))628                     .appendOrganizations(contentValuesListMap.get(Organization.CONTENT_ITEM_TYPE))629                     .appendWebsites(contentValuesListMap.get(Website.CONTENT_ITEM_TYPE));630             if ((mVCardType & VCardConfig.FLAG_REFRAIN_IMAGE_EXPORT) == 0631                     && mCurrentContactID != null && !isSimcardAccount(mCurrentContactID)) {632                 builder.appendPhotos(contentValuesListMap.get(Photo.CONTENT_ITEM_TYPE));633             }634             builder.appendNotes(contentValuesListMap.get(Note.CONTENT_ITEM_TYPE))635                     .appendEvents(contentValuesListMap.get(Event.CONTENT_ITEM_TYPE))636                     .appendIms(contentValuesListMap.get(Im.CONTENT_ITEM_TYPE))637                     .appendSipAddresses(contentValuesListMap.get(SipAddress.CONTENT_ITEM_TYPE))638                     .appendRelation(contentValuesListMap.get(Relation.CONTENT_ITEM_TYPE));639             return builder.toString();640         }641     }642 643     public void terminate() {644         closeCursorIfAppropriate();645         mTerminateCalled = true;646     }647 648     private void closeCursorIfAppropriate() {649         if (!mCursorSuppliedFromOutside && mCursor != null) {650             try {651                 mCursor.close();652             } catch (SQLiteException e) {653                 Log.e(LOG_TAG, "SQLiteException on Cursor#close(): " + e.getMessage());654             }655             mCursor = null;656         }657     }658 659     @Override660     protected void finalize() throws Throwable {661         try {662             if (!mTerminateCalled) {663                 Log.e(LOG_TAG, "finalized() is called before terminate() being called");664             }665         } finally {666             super.finalize();667         }668     }669 670     /**671      * @return returns the number of available entities. The return value is undefined672      * when this object is not ready yet (typically when {{@link #init()} is not called673      * or when {@link #terminate()} is already called).674      */675     public int getCount() {676         if (mCursor == null) {677             Log.w(LOG_TAG, "This object is not ready yet.");678             return 0;679         }680         return mCursor.getCount();681     }682 683     /**684      * @return true when there's no entity to be built. The return value is undefined685      * when this object is not ready yet.686      */687     public boolean isAfterLast() {688         if (mCursor == null) {689             Log.w(LOG_TAG, "This object is not ready yet.");690             return false;691         }692         return mCursor.isAfterLast();693     }694 695     /**696      * @return Returns the error reason.697      */698     public String getErrorReason() {699         return mErrorReason;700     }701 }