rotating object in canvas android -

i have code prints 4 rectangles, want 1 of them rotated , code works comments lines, if take them out not print rectangle4

   protected void ondraw(canvas canvas) {         super.ondraw(canvas);          red_fill = new paint();         red_fill.setcolor(color.red);         red_fill.setstyle(paint.style.fill);          rectangle.set((getwidth() / 2 + 150), getheight() / 2 - 20, (getwidth() / 2) + 170, (getheight() / 2));         rectangle2.set((getwidth() /2 - 10), getheight() / 2 - 200, (getwidth()/2) + 10, (getheight()/2) - 180);         rectangle3.set((getwidth() / 2 - 170), getheight() / 2 - 20, (getwidth() / 2) - 150, (getheight() / 2));         rectangle4.set((getwidth() / 2 - 130), getheight() / 2 - 120, (getwidth() / 2) - 110, (getheight() / 2) - 100);          canvas.drawrect(rectangle, red_fill);         canvas.drawrect(rectangle2, red_fill);         canvas.drawrect(rectangle3, red_fill);         //canvas.save();         //canvas.rotate(45);         canvas.drawrect(rectangle4, red_fill);         //canvas.restore();          invalidate();     }