how to force invalidate()?

i've got the following classes that make up my app that places a fisheye distortion on a bitmap. when i load the bitmap it ONLY displays when i touch the screen or slidebar and doesn't display the bitmap after the view's constructor has completed. i've put some logging in there and basically the ondraw() is called but nothing is drawn to the canvas. How can i get the app to invalidate straight after the view constructor completes?

public class TouchView extends View{

    private File tempFile;
    private byte[] imageArray;
    private Bitmap bgr;
    private Bitmap bm;
    private Bitmap bgr2 = null;;
    private Paint pTouch;
    private float centreX = 1;
    private float centreY = 1;
    private int radius = 50;
    private int Progress = 1;
    private static final String TAG = "*********TouchView";
    private Filters f = null;
    private boolean AsyncRunning = false;
   // private MyTask mt = null;



    public TouchView(Context context) {
        super(context);
       // TouchView(context, null);
    }




    public TouchView(Context context, AttributeSet attr) {
        super(context,attr);
        Log.e(TAG, "++++++++++ inside touchview constructor");



        tempFile = new File(Environment.getExternalStorageDirectory().
                getAbsolutePath() + "/"+"image.jpg");

        imageArray = new byte[(int)tempFile.length()];


     try{

            InputStream is = new FileInputStream(tempFile);
            BufferedInputStream bis = new BufferedInputStream(is);
            DataInputStream dis = new DataInputStream(bis);


            int i = 0;

            while (dis.available() > 0) {
            imageArray[i] = dis.readByte();
            i++;
            }

            dis.close();

       } catch (Exception e) {

               e.printStackTrace();
            }



        BitmapFactory.Options bfo = new BitmapFactory.Options();
        bfo.inSampleSize = 1;

        bm = BitmapFactory.decodeByteArray(imageArray, 0, imageArray.length, bfo);


        bgr = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig());
        bgr = bm.copy(bm.getConfig(), true);
        bgr2 = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig());



        f = new Filters();


        pTouch = new Paint(Paint.ANTI_ALIAS_FLAG);         
        pTouch.setXfermode(new PorterDuffXfermode(Mode.SRC_OUT)); 
        pTouch.setColor(Color.TRANSPARENT);
        pTouch.setStyle(Paint.Style.STROKE);

        Log.e(TAG, "++++++++++ end od touchview constructor");
    }// end of touchView constructor


    public void findCirclePixels(){ 

        Log.e(TAG, "++++++++++ inside fpc");
              new Thread(new Runnable() {
                public void run() {
                    float prog = (float)Progress/150000;

                final Bitmap bgr3 = f.barrel(bgr,prog,centreX,centreY);
                  TouchView.this.post(new Runnable() {
                    public void run() {
                      TouchView.this.bgr2 = bgr3;
                      TouchView.this.invalidate();
                    }
                  });
                }
              }).start();


        /*
        float prog = (float)Progress/150000;
        long startTime = System.currentTimeMillis();
        bgr2 = f.barrel(bgr,prog);
        long endTime = System.currentTimeMillis();
        long duration = endTime - startTime;
        Log.e(TAG, "++++++++++ barrel() took "+ duration+" ms");
        */

              Log.e(TAG, "++++++++++ end fpc");
        }// end of changePixel()




    @Override
    public boolean onTouchEvent(MotionEvent ev) {

        switch (ev.getAction()) {

            case MotionEvent.ACTION_DOWN: {

                centreX = (int) ev.getX();
                centreY = (int) ev.getY();
                //findCirclePixels();
                TouchView.this.invalidate();

                break;
            }开发者_StackOverflow

            case MotionEvent.ACTION_MOVE: {

                    centreX = (int) ev.getX();
                    centreY = (int) ev.getY();
                  //  findCirclePixels();
                  TouchView.this.invalidate();
                    break;

            }           

            case MotionEvent.ACTION_UP: 

                break;

        }
        return true;
    }//end of onTouchEvent





    public void initSlider(final HorizontalSlider slider)
    {
        Log.e(TAG, "******setting up slider*********** ");
        slider.setOnProgressChangeListener(changeListener);

    }



    private OnProgressChangeListener changeListener = new OnProgressChangeListener() {


        @Override
        public void onProgressChanged(View v, int progress) {
            // TODO Auto-generated method stub


              setProgress(progress);
            //TouchView.this.Progress = progress;


        }
    };




    @Override
    public void onDraw(Canvas canvas){
        super.onDraw(canvas);

        Log.e(TAG, "++++++++++ inside ondraw");
        canvas.drawBitmap(bgr2, 0, 0, null);
       // canvas.drawCircle(centreX, centreY, radius,pTouch);

        Log.e(TAG, "++++++++++end ondraw");

    }//end of onDraw




    protected void setProgress(int progress2) {
        Log.e(TAG, "***********in SETPROGRESS");
        this.Progress = progress2;



        findCirclePixels();
        invalidate();


    }




}

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Bitmap bgr2 is created in constructor but nothing is painted in it. It will get painted from findCirclePixels which gets called on slider change.

I think createBitmap (int width, int height, Bitmap.Config config) only uses config, you can use other variant create bitmap may be

Bitmap createBitmap (Bitmap source, int x, int y, int width, int height)

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Calling invalidate() in onAttachedToWindow() maybe?