sms提供者分析

android 7.1源碼分析(packages/providers/TelephonyProvider)

AndroidManifest.xml

<!-- This is a singleton provider that is used by all users.
             A new instance is not created for each user. And the db is shared
             as well. -->
<provider android:name="SmsProvider"
                  android:authorities="sms"
                  android:multiprocess="false"
                  android:exported="true"
                  android:singleUser="true"
                  android:readPermission="android.permission.READ_SMS" />

由此可知短信主機名:sms
短信的內容提供者:com.android.providers.telephony.SmsProvider
所需讀權限:android.permission.READ_SMS

SmsProvider.java

private static final int SMS_ALL = 0;
    private static final int SMS_ALL_ID = 1;
    private static final int SMS_INBOX = 2;
    private static final int SMS_INBOX_ID = 3;
    private static final int SMS_SENT = 4;
    private static final int SMS_SENT_ID = 5;
    private static final int SMS_DRAFT = 6;
    private static final int SMS_DRAFT_ID = 7;
    private static final int SMS_OUTBOX = 8;
    private static final int SMS_OUTBOX_ID = 9;
    private static final int SMS_CONVERSATIONS = 10;
    private static final int SMS_CONVERSATIONS_ID = 11;
    private static final int SMS_RAW_MESSAGE = 15;
    private static final int SMS_ATTACHMENT = 16;
    private static final int SMS_ATTACHMENT_ID = 17;
    private static final int SMS_NEW_THREAD_ID = 18;
    private static final int SMS_QUERY_THREAD_ID = 19;
    private static final int SMS_STATUS_ID = 20;
    private static final int SMS_STATUS_PENDING = 21;
    private static final int SMS_ALL_ICC = 22;
    private static final int SMS_ICC = 23;
    private static final int SMS_FAILED = 24;
    private static final int SMS_FAILED_ID = 25;
    private static final int SMS_QUEUED = 26;
    private static final int SMS_UNDELIVERED = 27;

    private static final UriMatcher sURLMatcher =
            new UriMatcher(UriMatcher.NO_MATCH);

    static {
        sURLMatcher.addURI("sms", null, SMS_ALL);
        sURLMatcher.addURI("sms", "#", SMS_ALL_ID);
        sURLMatcher.addURI("sms", "inbox", SMS_INBOX);
        sURLMatcher.addURI("sms", "inbox/#", SMS_INBOX_ID);
        sURLMatcher.addURI("sms", "sent", SMS_SENT);
        sURLMatcher.addURI("sms", "sent/#", SMS_SENT_ID);
        sURLMatcher.addURI("sms", "draft", SMS_DRAFT);
        sURLMatcher.addURI("sms", "draft/#", SMS_DRAFT_ID);
        sURLMatcher.addURI("sms", "outbox", SMS_OUTBOX);
        sURLMatcher.addURI("sms", "outbox/#", SMS_OUTBOX_ID);
        sURLMatcher.addURI("sms", "undelivered", SMS_UNDELIVERED);
        sURLMatcher.addURI("sms", "failed", SMS_FAILED);
        sURLMatcher.addURI("sms", "failed/#", SMS_FAILED_ID);
        sURLMatcher.addURI("sms", "queued", SMS_QUEUED);
        sURLMatcher.addURI("sms", "conversations", SMS_CONVERSATIONS);
        sURLMatcher.addURI("sms", "conversations/*", SMS_CONVERSATIONS_ID);
        sURLMatcher.addURI("sms", "raw", SMS_RAW_MESSAGE);
        sURLMatcher.addURI("sms", "attachments", SMS_ATTACHMENT);
        sURLMatcher.addURI("sms", "attachments/#", SMS_ATTACHMENT_ID);
        sURLMatcher.addURI("sms", "threadID", SMS_NEW_THREAD_ID);
        sURLMatcher.addURI("sms", "threadID/*", SMS_QUERY_THREAD_ID);
        sURLMatcher.addURI("sms", "status/#", SMS_STATUS_ID);
        sURLMatcher.addURI("sms", "sr_pending", SMS_STATUS_PENDING);
        sURLMatcher.addURI("sms", "icc", SMS_ALL_ICC);
        sURLMatcher.addURI("sms", "icc/#", SMS_ICC);
        //we keep these for not breaking old applications
        sURLMatcher.addURI("sms", "sim", SMS_ALL_ICC);
        sURLMatcher.addURI("sms", "sim/#", SMS_ICC);
    }
    public boolean onCreate() {
        setAppOps(AppOpsManager.OP_READ_SMS, AppOpsManager.OP_WRITE_SMS);
        mOpenHelper = MmsSmsDatabaseHelper.getInstance(getContext());
        return true;
    }

由onCreate函數可知創建數據庫的代碼在MmsSmsDatabaseHelper類中

MmsSmsDatabaseHelper.java

@Override
    public void onCreate(SQLiteDatabase db) {
        createMmsTables(db);
        createSmsTables(db);
        createCommonTables(db);
        createCommonTriggers(db);
        createMmsTriggers(db);
        createWordsTables(db);
        createIndices(db);
    }

	private void createSmsTables(SQLiteDatabase db) {
        // N.B.: Whenever the columns here are changed, the columns in
        // {@ref MmsSmsProvider} must be changed to match.
        db.execSQL("CREATE TABLE sms (" +
                   "_id INTEGER PRIMARY KEY," +
                   "thread_id INTEGER," +
                   "address TEXT," +
                   "person INTEGER," +
                   "date INTEGER," +
                   "date_sent INTEGER DEFAULT 0," +
                   "protocol INTEGER," +
                   "read INTEGER DEFAULT 0," +
                   "status INTEGER DEFAULT -1," + // a TP-Status value
                                                  // or -1 if it
                                                  // status hasn't
                                                  // been received
                   "type INTEGER," +
                   "reply_path_present INTEGER," +
                   "subject TEXT," +
                   "body TEXT," +
                   "service_center TEXT," +
                   "locked INTEGER DEFAULT 0," +
                   "sub_id INTEGER DEFAULT " + SubscriptionManager.INVALID_SUBSCRIPTION_ID + ", " +
                   "error_code INTEGER DEFAULT 0," +
                   "creator TEXT," +
                   "seen INTEGER DEFAULT 0" +
                   ");");

        /**
         * This table is used by the SMS dispatcher to hold
         * incomplete partial messages until all the parts arrive.
         */
        db.execSQL("CREATE TABLE raw (" +
                   "_id INTEGER PRIMARY KEY," +
                   "date INTEGER," +
                   "reference_number INTEGER," + // one per full message
                   "count INTEGER," + // the number of parts
                   "sequence INTEGER," + // the part number of this message
                   "destination_port INTEGER," +
                   "address TEXT," +
                   "sub_id INTEGER DEFAULT " + SubscriptionManager.INVALID_SUBSCRIPTION_ID + ", " +
                   "pdu TEXT);"); // the raw PDU for this part

        db.execSQL("CREATE TABLE attachments (" +
                   "sms_id INTEGER," +
                   "content_url TEXT," +
                   "offset INTEGER);");

        /**
         * This table is used by the SMS dispatcher to hold pending
         * delivery status report intents.
         */
        db.execSQL("CREATE TABLE sr_pending (" +
                   "reference_number INTEGER," +
                   "action TEXT," +
                   "data TEXT);");

        // Restricted view of sms table, only sent/received messages
        db.execSQL("CREATE VIEW " + SmsProvider.VIEW_SMS_RESTRICTED + " AS " +
                   "SELECT * FROM " + SmsProvider.TABLE_SMS + " WHERE " +
                   Sms.TYPE + "=" + Sms.MESSAGE_TYPE_INBOX +
                   " OR " +
                   Sms.TYPE + "=" + Sms.MESSAGE_TYPE_SENT + ";");
    }

由此可知sms.db數據庫包含以下字段:
_id,thread_id,address,person,date,date_sent,protocol,read,status,type,reply_path_present,subject,body,service_center,locked,sub_id,error_code,creator,seen