TxProvider.java 文件源码

@Nullable
@Override
public Uri insert(Uri uri, ContentValues values) {
    final SQLiteDatabase db = mCardsDBHelper.getWritableDatabase();

    Uri returnUri = null;
    int match = sUriMatcher.match(uri);
    switch (match) {
        case TRANSACTIONS: // Since insert and query all has same url
            long transactionId = db.insert(DatabaseContract.TABLE_TRANSACTIONS, null, values);
            if (transactionId > 0) {
                returnUri = ContentUris.withAppendedId(DatabaseContract.CONTENT_URI, transactionId);
                getContext().getContentResolver().notifyChange(uri, null);
            } else {
                throw new SQLException("Can't create ID");
            }
            break;
        default:
            throw new UnsupportedOperationException("This URI is not supported");
    }
    return returnUri;
}