Eu estou tentando desenhar em uma foto que tirei. O desenho funciona sem a imagem desenhada, mas se eu desenhar o bitmap eu só vejo o bitmap, mas surge o desenho n. Eu tentei muito, mas nada parece ajudar. Desde já, obrigado.

private class myView extends View implements OnTouchListener{

    File root = Environment.getExternalStorageDirectory();
    Path path;
    ArrayList<Path> _graphics = new ArrayList<Path>();
    Bitmap myBitmap;
    Paint myPaint;

    public myView(Context context) {
        super(context);

        File file = new File(root, "temp.jpg");
        myBitmap = null;
        if (file.exists()) {
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inPreferredConfig = Bitmap.Config.ARGB_8888;
            myBitmap = setBitmap(BitmapFactory.decodeFile(new File(root,
                    "temp.jpg").getPath(), options));
        }

        myPaint = new Paint();
        myPaint.setColor(Color.GREEN);
        myPaint.setStyle(Paint.Style.STROKE);
        myPaint.setStrokeWidth(3);
    }

    @Override
    protected void onDraw(Canvas canvas) {          
        canvas.drawBitmap(myBitmap, 0, 0, null);
        for (Path path : _graphics) {
             canvas.drawPath(path, myPaint);
        }
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            path = new Path();
            path.moveTo(event.getX(), event.getY());
        } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
            path.lineTo(event.getX(), event.getY());
        } else if (event.getAction() == MotionEvent.ACTION_UP) {
            path.lineTo(event.getX(), event.getY());
            _graphics.add(path);
        }

        return true;
    }
}