getSupportFragmentManager() 方法不起作用

我想实现一个 Recycler 视图，其中单击一个项目时会出现一个片段。但是 getSupportFragmentManager() 方法对我不起作用，我尝试替换 getActivity() 和 FragmentActivity，但对我没有任何作用。

public class AimsListAdapter extends RecyclerView.Adapter  {

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.aims_fragment_list,viewGroup,false);
        return new AimsListHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
        ((AimsListHolder)viewHolder).bindView(i);

    }

    @Override
    public int getItemCount() {
        return OurAimsDataForFragment.tittle.length;
    }
    private class AimsListHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

        private TextView AimsTextName;
        private TextView AimsTextTap;
        private ImageView AimsImage;

        public AimsListHolder(@NonNull View itemView) {
            super(itemView);
            AimsTextName = (TextView)itemView.findViewById(R.id.aims_text_name);
            AimsTextTap = (TextView) itemView.findViewById(R.id.aims_text_tap);
            AimsImage = (ImageView) itemView.findViewById(R.id.aims_image);

            itemView.setOnClickListener(this);

        }
        public  void bindView(int position){
            AimsTextName.setText(OurAimsDataForFragment.tittle[position]);
            AimsTextTap.setText(OurAimsDataForFragment.tap[position]);
            AimsImage.setImageResource(OurAimsDataForFragment.picturePath[position]);
        }

        @Override
        public void onClick(View v) {
            int position = getAdapterPosition();

                switch (position) {
                    case 1:
                        Fragment verifragment = new AimsDialogMetkaFragment();
                        FragmentTransaction ft3 = FragmentActivity.getSupportFragmentManager().beginTransaction();
                        ft3.add(R.id.content_frame, verifragment);
                        ft3.commit();
                        break;
                }

        }


    }