如果父布局是LinearLayout
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) getLayoutParams();
params.leftMargin = 50;
params.rightMargin = 100;
setLayoutParams(params);
如果父布局是RelativeLayout, 直接设置leftMargin，rightMargin没有效果
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) getLayoutParams();
layoutParams.setMargins(getLeft() + offsetX, getTop() + offsetY,0,0);
setLayoutParams(layoutParams);
