網上很多人對設置控件的位置都使用view.setPadding(left, top, right, bottom) ，其實這玩意很差勁，它是設置自己本身位置的偏移，我們很少需要這種效果，我需要的設置控件相對屏幕左上角的X 、Y位置。眾里尋他千百度，驀然回首，那人卻在燈火闌珊處！
import android.view.View;
import android.view.ViewGroup.MarginLayoutParams;
import android.widget.RelativeLayout;
/*
* 獲取、設置控件信息
*/
public class WidgetController {
/*
* 獲取控件寬
*/
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());
}
/*
* 獲取控件高
*/
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());
}
/*
* 設置控件所在的位置X，并且不改變寬高，
* X為絕對位置，此時Y可能歸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);
}
/*
* 設置控件所在的位置Y，并且不改變寬高，
* Y為絕對位置，此時X可能歸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);
}
/*
* 設置控件所在的位置YY，并且不改變寬高，
* XY為絕對位置
*/
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);
}
}
