Java – how to set setlayoutparams on dynamically adding elements on a widget

Currently, I am dynamically adding elements to my widget using the following:

RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_design);

RemoteViews newView = new RemoteViews(context.getPackageName(), R.layout.widget_item);
views.addView(R.id.view_container, newView);

But how to dynamically add margins, weights and other attributes to the added elements?

At present, I have tried (using the code I found from different websites):

LinearLayout item = (LinearLayout) ((Activity) context).findViewById(R.id.widgetItem);
MarginLayoutParams marginParams = new MarginLayoutParams(item.getLayoutParams());
marginParams.setMargins(10, 50, 4, 5);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(marginParams);
item.setLayoutParams(layoutParams);

But this power is turned off

Of logcat:

resolvent:

LinearLayout layoutParams = item.getLayoutParams();
layoutParams.setMargins(10, 50, 4, 5);
item.setLayoutParams(layoutParams);

Creating new layoutparams in some way will always lead to such errors. I think there are still some fields that are not set. Only copy the existing ones