android中dip、px互相換算

dip與px的差別

/**
	 * dip轉px
	 * @param context
	 * @param dipValue
	 * @return
	 */
	public static int dip2px(Context context, float dipValue){            
		final float scale = context.getResources().getDisplayMetrics().density;                 
		return (int)(dipValue * scale + 0.5f);         
	}     
	
	/**
	 * px轉dip
	 * @param context
	 * @param pxValue
	 * @return
	 */
	public static int px2dip(Context context, float pxValue){                
		final float scale = context.getResources().getDisplayMetrics().density;                 
		return (int)(pxValue / scale + 0.5f);         
	}