如何从 RecyclerView.Adapter<CardAdapter.ViewHolder> 打开片段 [英] How open fragment from RecyclerView.Adapter&lt;CardAdapter.ViewHolder&gt;

问题描述

1.TabLayout

1.TabLayout

- tab1 (Fragment1)
- tab2 (Fragment2)
- tab3 (Fragment3)
     * RecyclerView + CardView (OnClick)

On CardView ClickListner 在 tab3 中打开另一个片段.那么如何在tab3中打开fragment.

On CardView ClickListner open another fragment in tab3. So how to open fragment in tab3.

错误在getFragmentManager():

FragmentTransaction transaction = getFragmentManager().beginTransaction();

我尝试了:

FragmentTransaction transaction = activity.getFragmentManager().beginTransaction();
FragmentTransaction transaction = itemview.getContext().getFragmentManager().beginTransaction();

但是错误没有解决.

这是我的代码:

 public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {

    List<NatureItem> mItems;
    private int lastPosition = -1;
    Context context;
    TaskFragment main;
    public CardAdapter(Context context,TaskFragment ma)
    {

        this.context=context;
        main=ma;
    }


    public CardAdapter() {
        super();
        mItems = new ArrayList<NatureItem>();
        NatureItem nature = new NatureItem();
        nature.setName("The Paris Attack 2015");
        nature.setDes("Lorem ipsum dolor sit amet.");
        nature.setThumbnail(R.drawable.news1);
        mItems.add(nature);

           }



    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
        View v = LayoutInflater.from(viewGroup.getContext())
                .inflate(R.layout.custom_list, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(v);

     return viewHolder;
    }


     @Override
    public void onBindViewHolder(ViewHolder viewHolder, int i) {
        NatureItem nature = mItems.get(i);
        viewHolder.tvNature.setText(nature.getName());
        viewHolder.tvDesNature.setText(nature.getDes());
        viewHolder.imgThumbnail.setImageResource(nature.getThumbnail());
      //  setAnimation(viewHolder.card,i);
    }


    @Override
    public int getItemCount() {
        return mItems.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {

        private int lastPosition = -1;
        public ImageView imgThumbnail;
        public TextView tvNature;
        public TextView tvDesNature;
       // Button btnclear,btncancle;
        CardView card;
        Activity activity;
        Context co;
        public ViewHolder(final View itemView) {
            super(itemView);
            imgThumbnail = (ImageView)     itemView.findViewById(R.id.img_thumbnail);
            tvNature = (TextView) itemView.findViewById(R.id.tv_nature);
            tvDesNature = (TextView) itemView.findViewById(R.id.tv_des_nature);
            card = (CardView) itemView.findViewById(R.id.card);



    card.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

        Toast.makeText(itemView.getContext(), "Clicked Card...", Toast.LENGTH_LONG).show();

           ShareFragment newFragment = new ShareFragment();
            FragmentTransaction transaction =  getFragmentManager().beginTransaction();
            transaction.replace(R.id.viewFragments, newFragment);
            transaction.addToBackStack(null);
            transaction.commit();

            }
    });

        }
    }
}

推荐答案

在你的 onclick 中按如下方式打开新片段

Open new fragment as follows in your onclick

@Override
        public void onClick(View view){

            AppCompatActivity activity = (AppCompatActivity) view.getContext();
            Fragment myFragment = new MyFragment();
            activity.getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, myFragment).addToBackStack(null).commit();


        }

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