Android convert dp to px and vice versa

DpToPxAndPxToDp

        public static float convertPixelsToDp(float px){
	    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
	    float dp = px / (metrics.densityDpi / 160f);
	    return Math.round(dp);
	}
	
       public static float convertDpToPixel(float dp){
	    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
	    float px = dp * (metrics.densityDpi / 160f);
	    return Math.round(px);
        }
//http://stackoverflow.com/questions/4605527/converting-pixels-to-dp
//The above method results accurate method compared to below methods
//http://stackoverflow.com/questions/8309354/formula-px-to-dp-dp-to-px-android


private int convertDpToPx(int dp){
    return Math.round(dp*(getResources().getDisplayMetrics().xdpi/DisplayMetrics.DENSITY_DEFAULT));
		
}
	
private int convertPxToDp(int px){
    return Math.round(px/(Resources.getSystem().getDisplayMetrics().xdpi/DisplayMetrics.DENSITY_DEFAULT));
}

Thanks