recycleview item宽度不能充满

设置recycleview的layoutmanager

 LinearLayoutManager layoutManager = new LinearLayoutManager(context) {
            @Override
            public RecyclerView.LayoutParams generateDefaultLayoutParams() {
                return new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT);
            }
        };

recyclerView.setLayoutManager(layoutManager);即可