1、可以在创建表之前判断，这样就不会重新创建，create table if not exists Student(name text primary key, code integer); 比平时多了if not exists

2、遍历表名

Cursor cursor = db.rawQuery("select name from sqlite_master where type='table';", null);
  while(cursor.moveToNext()){
   //遍历出表名
   String name = cursor.getString(0);
   Log.i("System.out", name);
  }


3、查询语句查询

 String sql = "select count(*) as c from sqlite_master where type ='table' and name ='Student';";
                    cursor = db.rawQuery(sql, null);
                    if(cursor.moveToNext()){
                            int count = cursor.getInt(0);
                            if(count>0){
                                    result = true;
                            }
                    }