Android Learning _ database query using Rawquery encountered problems

Use today

Cursor C = Db.rawquery ("select * from Bus_line where?") Like ' percent ';
New String [] {"Linename"});

Querying the database, taking for granted that the table name from the back can also be substituted with placeholders, so

Cursor C = Db.rawquery ("Select * from?") Where? Like ' percent ';
New String [] {"Bus_line", "Linename"});

This sentence has been an error: near? , a sytax error, and finally took an afternoon to figure out if the array could replace the SQL statement? Placeholders apply only to query parameters.

Android Learning _ database query using Rawquery encountered problems