android 獲取控制元件大小和設定調整控制元件的位置XY
阿新 • • 發佈:2019-01-27
網上很多人對設定控制元件的位置都使用 view.setPadding(left, top, right, bottom) ,其實這玩意很差勁,它是設定自己本身位置的偏移,我們很少需要這種效果,我需要的設定控制元件相對螢幕左上角的X 、Y位置。眾裡尋他千百度,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、設定控制元件資訊
- */
-
public
- /*
- * 獲取控制元件寬
- */
- publicstaticint 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());
- }
- /*
- * 獲取控制元件高
- */
- publicstaticint 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());
- }
- /*
- * 設定控制元件所在的位置X,並且不改變寬高,
- * X為絕對位置,此時Y可能歸0
- */
- publicstaticvoid 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);
- }
- /*
- * 設定控制元件所在的位置Y,並且不改變寬高,
- * Y為絕對位置,此時X可能歸0
- */
- publicstaticvoid 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);
- }
- /*
- * 設定控制元件所在的位置YY,並且不改變寬高,
- * XY為絕對位置
- */
- publicstaticvoid 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);
- }
- }