Android getdimension,getdimensionpixeloffset,getdimensionpixelsize

1. For example, you might want to get the value of a custom property in the onmeasure (int, int) method. Such as:

1TypedArray A =context.obtainstyledattributes (Attrs,2 r.styleable.cascadelayout);3 4         Try {5             //gets the value that is set for the custom property in the XML file6Mhorizontalspacing =A.getdimensionpixelsize (7 r.styleable.cascadelayout_horizontal_spacing,8 getresources (). Getdimensionpixelsize (9 r.dimen.cascade_horizontal_spacing));Ten  OneMverticalspacing =A.getdimensionpixelsize ( A r.styleable.cascadelayout_vertical_spacing, - getresources (). Getdimensionpixelsize ( - r.dimen.cascade_vertical_spacing)); theSystem.out.println ("mhorizontalspacing-->>" +mhorizontalspacing -+ "mverticalspacing" +mverticalspacing); -}Catch(Exception e) { -}finally { + a.recycle (); -}

But I set the cascadelayout_horizontal_spacing and cascadelayout_vertical_spacing in the custom view

1 <Com.example.fanghack003.view.CascadeLayout2         Android:layout_width= "Match_parent"3 Android:layout_height= "Match_parent"4 cascade:horizontal_spacing= "30DP"5 cascade:vertical_spacing= "20DP" 6 Android:background= "#FF00FF"7         />

The value set is but the log shows that mhorizontalspacing and mverticalspacing are 60 and 40 respectively.

The functions of getdimension and Getdimensionpixeloffset are similar,

is to get the value of a dimen, but if the unit is a DP or SP, you need to multiply it by density

If it is PX, do not multiply. and getdimension returns float,getdimensionpixeloffset returns INT.

Getdimensionpixelsize, whether it's DP or SP or PX, is multiplied by denstiy

The density of my cell phone is 2.0 so it is multiplied by 2;

2. Example:

1     <Resources>  2         <dimenname= "Dp_01">16dp</dimen>  3         <dimenname= "Px_01">16px</dimen>  4         <dimenname= "Sp_01">16sp</dimen>  5     </Resources>  

1     floata1=getresources (). Getdimension (R.DIMEN.DP_01); 2     intA2=getresources (). Getdimensionpixeloffset (R.DIMEN.DP_01); 3     inta3=getresources (). Getdimensionpixelsize (R.DIMEN.DP_01); 4       5     floatb1=getresources (). Getdimension (R.DIMEN.PX_01); 6     intB2=getresources (). Getdimensionpixeloffset (R.DIMEN.PX_01); 7     intb3=getresources (). Getdimensionpixelsize (R.DIMEN.PX_01); 8       9     floatc1=getresources (). Getdimension (R.DIMEN.SP_01); Ten     intC2=getresources (). Getdimensionpixeloffset (R.DIMEN.SP_01);  One     intc3=getresources (). Getdimensionpixelsize (R.DIMEN.SP_01);  A        -LOG.D ("Test", "getdimension=" +a1+ ", getdimensionpixeloffset=" +a2+ ", getdimensionpixelsize=" +A3);  -LOG.D ("Test", "getdimension=" +b1+ ", getdimensionpixeloffset=" +b2+ ", getdimensionpixelsize=" +b3);  theLOG.D ("Test", "getdimension=" +c1+ ", getdimensionpixeloffset=" +c2+ ", getdimensionpixelsize=" +c3 ");

1     //device (480*800,240dpi,density=1.5):  2    getdimension= 24.0, getdimensionpixeloffset=24,getdimensionpixelsize=24    3    getdimension= 16.0, getdimensionpixeloffset=16,getdimensionpixelsize=24    4     getdimension= 24.0, Getdimensionpixeloffset=24,getdimensionpixelsize=24    

Android getdimension,getdimensionpixeloffset,getdimensionpixelsize