class V extends View {

    Bitmap bm;
    Matrix matrix = new Matrix();
    Matrix m0 = new Matrix();
    Matrix m1 = new Matrix();

    public V(Context context) {
        super(context);
        bm = BitmapFactory.decodeResource(context.getResources(), R.drawable.test);

    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        float cx = w / 2f;
        float cy = h / 2f;
        float bw = bm.getWidth();
        float bh = bm.getHeight();
        m0.postTranslate(cx - bw / 2f, cy - bh / 2f);
        matrix = m0;

        m1.set(m0);
        m1.postRotate(90, cx, cy);
        m1.postScale(bw / bh ,bh / bw, cx, cy);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        matrix = matrix == m0? m1 : m0;
        invalidate();
        return false;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawBitmap(bm, matrix, null);
    }
}