android 获取控件大小和设置调整控件的位置XY

2013-06-19 14:10

网上很多人对设置控件的位置都使用      view.setPadding(left, top, right, bottom) ，其实这玩意很差劲，它是设置自己本身位置的偏移，我们很少需要这种效果，我需要的设置控件相对屏幕左上角的X 、Y位置。众里寻他千百度，蓦然回首，那人却在灯火阑珊处！

 import android.view.View;
 import android.view.ViewGroup.MarginLayoutParams;
 import android.widget.RelativeLayout;

 /*
  * 获取、设置控件信息
  */
 public class WidgetController {

     /*
      * 获取控件宽
      */
     public static int getWidth(View view)
     {
         int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
         int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
         view.measure(w, h);
         return (view.getMeasuredWidth());
     }
     /*
      * 获取控件高
      */
     public static int getHeight(View view)
     {
         int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
         int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED);
         view.measure(w, h);
         return (view.getMeasuredHeight());
     }

     /*
      * 设置控件所在的位置X，并且不改变宽高，
      * X为绝对位置，此时Y可能归0
      */
     public static void setLayoutX(View view,int x)
     {
         MarginLayoutParams margin=new MarginLayoutParams(view.getLayoutParams());
         margin.setMargins(x,margin.topMargin, x+margin.width, margin.bottomMargin);
         RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);
         view.setLayoutParams(layoutParams);
     }
     /*
      * 设置控件所在的位置Y，并且不改变宽高，
      * Y为绝对位置，此时X可能归0
      */
     public static void setLayoutY(View view,int y)
     {
         MarginLayoutParams margin=new MarginLayoutParams(view.getLayoutParams());
         margin.setMargins(margin.leftMargin,y, margin.rightMargin, y+margin.height);
         RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);
         view.setLayoutParams(layoutParams);
     }
     /*
      * 设置控件所在的位置YY，并且不改变宽高，
      * XY为绝对位置
      */
     public static void setLayout(View view,int x,int y)
     {
         MarginLayoutParams margin=new MarginLayoutParams(view.getLayoutParams());
         margin.setMargins(x,y, x+margin.width, y+margin.height);
         RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);
         view.setLayoutParams(layoutParams);
     }
 }