Jak ulozit fragment canvasu – Java – Fórum – Programujte.com

Ahoj mozna to chci delat blbe ale chci se zeptat jak z canvasu ulozit pro pozdejsi pouziti kvuli obnove mista do puvodniho stavu.

class Panel extends SurfaceView implements SurfaceHolder.Callback {
    CanvasControler canvascontroler=null;
    LastCanvasFragment lastFragment=null;
    public Panel(Context context, AttributeSet attrs) {
        super(context, attrs);
        getHolder().addCallback(this);
        canvascontroler = new CanvasControler(getHolder(), this);
        setFocusable(true);
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        // TODO Auto-generated method stub
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        // TODO Auto-generated method stub
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        // TODO Auto-generated method stub
    }

    public void DrawImage(float x, float y, int imageId)
    {
        Canvas canvas=null;
        if(lastFragment!=null) {
            canvas=canvascontroler.OpenCanvas();
            canvas.drawBitmap(lastFragment.lastFragment, lastFragment.left, lastFragment.top, null);
            canvascontroler.CloseCanvas();
            lastFragment=null;
        }
        Bitmap kangoo = BitmapFactory.decodeResource(getResources(),imageId);
       // lastFragment=canvascontroler.GetLastFragment(kangoo,(int)x,(int)y);
        canvas=canvascontroler.OpenCanvas();
        if(canvas!=null){
            canvas.drawBitmap(kangoo, x, y, null);
            canvascontroler.CloseCanvas();
        }
    }

mam vyse uvedeny kod a pokud zvyse uvedene tridy zavolam draw image pak se nakresli obrazek do souradnic ktere jsou predavany z venku potud OK

dale mam zaremovanou metodu "// lastFragment=canvascontroler.GetLastFragment(kangoo,(int)x,(int)y);"

jeji kod

    public LastCanvasFragment GetLastFragment(Bitmap bm, int left, int top) {

        Canvas c = _surfaceHolder.lockCanvas(new Rect(left, top, left + bm.getWidth(), top + bm.getHeight()));
        if (c != null) {
            LastCanvasFragment ldf = new LastCanvasFragment();
            ldf.left = left;
            ldf.top = top;
            ldf.right = left + bm.getWidth();
            ldf.bottom = top + bm.getHeight();
            ldf.lastFragment = Bitmap.createBitmap(bm);
            try {
                c.setBitmap(ldf.lastFragment);
            }
            catch(IllegalStateException ex) {
                //Log.e("Chyba",ex.getMessage());

               // Log.println(0,"Chyba",ex.getLocalizedMessage());
                ldf=null;
            }
            _surfaceHolder.unlockCanvasAndPost(c);
            return ldf;
        }
        return null;

ze keter bych si chtel vratit instanci "LastCanvasFragment"

tato trida je definovana nasledne

public class LastCanvasFragment {
    public Bitmap lastFragment =null;
    public float left;
    public float top;
    public float right;
    public float bottom;

    public LastCanvasFragment(){}
}

a jeji clen "public Bitmap lastFragment" by mel vratit prave v tuto chvili  pocmaranost canvasu ale pouze z definovanych souradnic

a toto se mi proste vubec nevede

nevite nekdo proc?

dik za kazdou radu