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);	}}