body.setTransform does not work inside contact listener (andEngine and box2d)

Question

I'm trying to move player body while contact with teleport but setTransform isn't executed.This is my contact listener

mPhysicsWorld.setContactListener(new ContactListener()
    {

        @Override
        public void beginContact(Contact contact) 
        {

            final Fixture fixtureA = contact.getFixtureA();
            final Body bodyA = fixtureA.getBody();

            final Fixture fixtureB = contact.getFixtureB();
            final Body bodyB = fixtureB.getBody();
            if(bodyA.getUserData().equals("Player") || bodyB.getUserData().equals("Player") )
            {

                for(int i = 0; i < telList.size(); i++)
                {
                    if(bodyA.getUserData() == telList.get(i))
                    {
                        Teleport tl = telList.get(i);
                        if(tl.look.getX() > pl.look.getX())
                        {
                            pl.moveTo(150, 320);
                            pl.setLinearVelocity(new Vector2(-4.5f,0));
                        }else
                        {
                            pl.moveTo(150, 320);
                            pl.setLinearVelocity(new Vector2(4.5f,0));
                        }
                        break;
                    }else if(bodyB.getUserData() == telList.get(i))
                    {
                        Teleport tl = telList.get(i);
                        if(tl.look.getX() > pl.look.getX())
                        {
                            pl.moveTo(150, 320);
                            pl.setLinearVelocity(new Vector2(-4.5f,0));
                        }else
                        {
                            pl.moveTo(150, 320);
                            pl.setLinearVelocity(new Vector2(4.5f,0));
                        }
                        break;
                    }
                }
            }
        }

        @Override
        public void endContact(Contact contact) 
        {

        }
        });

Player class has method

public void moveTo(int x, int y)
{
    body.setTransform(new Vector2(x/32,y/32), 0);
}

and it works fine but isn't executed inside contact listener. And I'm sure contact is occured because it enters the "if" block and pl.setLinearVelocity(new Vector2(-4.5f,0)); is executed.

Thanks in advance

Answer 1

I don't know why it's impossieble to use setTransform inside contact listener but I solved this problem in this way. Created class for tasks

public class moveBodyTask {

Player pl;
float x;
float y;
boolean direction;
moveBodyTask(Player b, float x1, float y1, boolean d)
{
    pl = b;
    x = x1;
    y = y1;
    direction = d;
}

public void move()
{
    pl.moveTo(x, y);
    if(direction)
        pl.setLinearVelocity(new Vector2(5,0));
    else
        pl.setLinearVelocity(new Vector2(-5,0));

}

}

then inside contack listener i just add new task to list

    taskList.add(new moveBodyTask(pl, x+TILE_SIZE, y, true));

and execute it while update

scene.registerUpdateHandler(new IUpdateHandler()
    {

        @Override
        public void onUpdate(float pSecondsElapsed) {
            if(!taskList.isEmpty())
            {
                for(int i = 0; i < taskList.size(); i++)
                {
                    taskList.get(i).move();
                }
                taskList.clear();
            }

        }

        @Override
        public void reset() {
            // TODO Auto-generated method stub

        }
    });

for me it works fine.