1. Telephony.ThreadsColumns
Columns for the "threads" table used by MMS and SMS.
在Telephony.ThreadsColumns接口中定义了一些字符串常量，每个常量的值都是数据库表threads的一个字段。
| _ID | "_id" | INTEGER (long) | The unique ID for a row. |
| DATE | "date" | INTEGER (long) | The date at which the thread was created. |
| RECIPIENT_IDS | "recipient_ids" | TEXT | A string encoding of the recipient IDs of the recipients of the message, in numerical order and separated by spaces. |
| MESSAGE_COUNT | "message_count" | INTEGER | The message count of the thread. |
| READ | "read" | INTEGER | Indicates whether all messages of the thread have been read. |
| SNIPPET | "snippet" | TEXT | The snippet of the latest message in the thread. |
| SNIPPET_CHARSET | "snippet_cs" | INTEGER | The charset of the snippet. |
| TYPE | "type" | INTEGER | Type of the thread, either Threads.COMMON_THREAD or Threads.BROADCAST_THREAD. |
| ERROR | "error" | INTEGER | Indicates whether there is a transmission error in the thread. |
| HAS_ATTACHMENT | "has_attachment" | INTEGER | Indicates whether this thread contains any attachments. |
2. 在Telephony.Threads类中定义threads.type的两个可选值。
public static final int COMMON_THREAD = 0;
public static final int BROADCAST_THREAD = 1;
3. 在Telephony.Threads中定义了一些常量。
private static final Uri THREAD_ID_CONTENT_URI = Uri.parse(
"content://mms-sms/threadID");
public static final Uri CONTENT_URI = Uri.withAppendedPath(
MmsSms.CONTENT_URI, "conversations");
public static final Uri OBSOLETE_THREADS_URI = Uri.withAppendedPath(
CONTENT_URI, "obsolete");
4. 定义Telephony.MmsSms类。
Contains all MMS and SMS messages.
5. 在Telephony.MmsSms中定义了一些URI常量。
public static final Uri CONTENT_URI = Uri.parse("content://mms-sms/");
public static final Uri CONTENT_CONVERSATIONS_URI = Uri.parse(
"content://mms-sms/conversations");
public static final Uri CONTENT_FILTER_BYPHONE_URI = Uri.parse(
"content://mms-sms/messages/byphone");
public static final Uri CONTENT_UNDELIVERED_URI = Uri.parse(
"content://mms-sms/undelivered");
public static final Uri CONTENT_DRAFT_URI = Uri.parse(
"content://mms-sms/draft");
public static final Uri CONTENT_LOCKED_URI = Uri.parse(
"content://mms-sms/locked");
public static final Uri SEARCH_URI = Uri.parse(
"content://mms-sms/search");
6. 在Telephony.Threads中定义了两个方法来获取或者创建ThreadId。
public static long getOrCreateThreadId(Context context, String recipient)
public static long getOrCreateThreadId(Context context, Set<String> recipients)