LinearLayout 动态设置margin

FrameLayout.LayoutParams params= 
new FrameLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        LinearLayout searchViewContainer = 
(LinearLayout)searchView.findViewById(R.id.search_view_container);
        params = 
(FrameLayout.LayoutParams)searchViewContainer.getLayoutParams();
params.setMargins(0, 80, 0, 0);//left,top,right,bottom
searchViewContainer.setLayoutParams(params);

使用getLayoutParams()时，必须要有父控件。