Android 之dp和px之间转换

 /** dip转换px */
    public static int dip2px(int dip) {
        final float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (dip * scale + 0.5f);
    }

    /** pxz转换dip */
    public static int px2dip(int px) {
        final float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (px / scale + 0.5f);
    }