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如何从RecyclerView.Adapter<CardAdapter.ViewHolder>打开片段
EN

Stack Overflow用户
提问于 2015-12-16 19:15:51
回答 5查看 53.8K关注 0票数 28

1.TabLayout

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

CardView ClickListner上,在tab3中打开另一个片段。那么如何在tab3中打开片段。

错误在getFragmentManager()

FragmentTransaction transaction = getFragmentManager().beginTransaction();

而不是这样,我试着:

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

但是错误没有解决。

下面是我的代码:

 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();

            }
    });

        }
    }
}
EN

回答 5

Stack Overflow用户

发布于 2017-11-02 14:40:50

在onclick中打开新片段,如下所示

@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();


        }
票数 45
EN

Stack Overflow用户

发布于 2015-12-16 20:01:40

如果您使用了支持库片段或默认片段,请确保在任何地方都使用相同的片段。并谨慎使用"getSupportFragmentManager“或"getFragmentManager”。

在构造函数中传递上下文。

public CardAdapter(Context context) {
        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);
               }

onClick内幕

....Your Code

ShareFragment newFragment = new ShareFragment();
FragmentTransaction transaction = /* Here is the change.*/context.getFragmentManager().beginTransaction();
    transaction.replace(R.id.viewFragments, newFragment);

...Your Code

更新

Inside onClick call mainActivity setFragment method to replace fragment.

((MainActivity) context).setFragment(yourFragment);


public void setFragment(Fragment frag){
FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.replace(R.id.viewFragments, frag);
}
票数 7
EN

Stack Overflow用户

发布于 2020-04-13 23:05:28

要从一个片断移动到另一个片断(从RecyclerView MyViewHolder类),请使用以下代码

 Fragment fragment = new AttendanceFragment();
                FragmentManager fragmentManager = ((FragmentActivity) mContext).getSupportFragmentManager();
                FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
                fragmentTransaction.replace(R.id.fragment_container, fragment);
                fragmentTransaction.addToBackStack(null);
                fragmentTransaction.commit();
票数 2
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/34310592

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