ContentProvider Insert

 @Override
    public Uri insert(Uri uri, ContentValues contentValues) {

        if (mBookOpenHelper == null)
            mBookOpenHelper = new BookOpenHelper(this.getContext());

        SQLiteDatabase sqLiteDatabase = mBookOpenHelper.getWritableDatabase();
        try {
            long newID = sqLiteDatabase.insertOrThrow(BookOpenHelper.BOOK_TABLE, null, contentValues);
            if (newID > 0) {
                Uri newUri = ContentUris.withAppendedId(uri, newID);
                getContext().getContentResolver().notifyChange(uri, null);
                sqLiteDatabase.close();
                return newUri;
            } else {
                throw new SQLException("Failed to insert row into " + uri);

            }
        } catch (SQLiteConstraintException e) {
            Log.i(this.getClass().getName(), "Ignoring constraint failure.");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }