Question

I’m trying to make my first android game, just a pong clone really, I have a “PongView” class that extends SurfaceView and is my only view. It has objects of my “Ball” and “Paddle” classes. I just started moving code related to things, like detecting wall collisions, to the Ball and Paddle classes to tidy up my main view a bit and realised that i’d need to give these classes a way to know the views width and height. At the moment my work around is just to intialise a global variable inside the surfaceviews surfaceChanged method that stores the width and height of the view, like so:

//at the top of my class
private int viewWidth;
private int viewHeight;
..

@Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {

        //INITIALISE viewWidth and viewHeight here
        //so that they can be passed as parameters
        viewWidth = getWidth();
        viewHeight = getHeight();

        //some other irrelevant code here
    }

Then I pass them as parameters:

ball.handleWallCollision(viewWidth, viewHeight);

However i’m not sure this is the way to go about it, as i will need to pass them in quite often i imagine. I thought it would be better if i had a copy of the current PongView in each class? But i’m not sure if thats true or how/when to go about getting it.

What would you recommend? Thanks

Answer 1

use object of surface view class that was used to setting view in activity.That object is live and will contain all changes regarding that surface view

SurfaceView sur=new SurfaceView(this);  /// you created object
setContentView(sur);
//you do your work
//surface view is running

Now you want to exit from that activity.Then in onDestroy() used
CommonClass.ObjectVraible=sur;

this line will save current state of the surfaceview