单击支架上的 itemView 时无法打开片段

Question

我尝试尽可能多地使用片段而不是 activity，在我的自定义适配器中 PostAdapter 我使用 holder.itemView.setOnClickListener 方法在 DetailsFragment 处传递和打开 DetailsFragment结束，但是当我点击 recyclerView 上的任何项目时，它没有做任何事情

这是 PostAdapter Class

    public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder> {
    private Context context;
    private List<Item> items;

    public PostAdapter(Context context, List<Item> items) {
        this.context = context;
        this.items = items;
    }

    @NonNull
    @Override
    public PostAdapter.PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View view = inflater.inflate(R.layout.post_item, parent, false);
        return new PostViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull PostViewHolder holder, int position) {
        final Item item = items.get(position);
        holder.postTitle.setText(item.getTitle());
        final Document document = Jsoup.parse(item.getContent());
        Elements elements = document.select("img");

//        Log.d("CODE", "Image: "+elements.get(0).attr("src"));
//        Log.d("Text",document.text());
        holder.postDescription.setText(document.text());
        Glide.with(context).load(elements.get(0)
                .attr("src"))
                .into(holder.postImage);

        holder.itemView.setOnClickListener(view -> {
            DetailsFragment detailsFragment = new DetailsFragment();

            Bundle bundle = new Bundle();

            bundle.putString("url", item.getUrl());
            bundle.putString("itemTitle", item.getTitle());
            bundle.putString("title", item.getTitle());
            bundle.putString("content", item.getContent());
            int youtubeThumbnailImagesetVisibility = 0;

            Element element = document.body();

            String youtubeThumbnailImageSrc = "";
            String youTubeLink = "";
            for (Element e : element.getElementsByClass
                    ("YOUTUBE-iframe-video")) {
                youtubeThumbnailImageSrc = e.attr("data-thumbnail-src");
                youTubeLink = e.attr("src");
                Log.e("YouTube thumbnail", youtubeThumbnailImageSrc);
                Log.e("Youtube link", youTubeLink);
            }

            if (youtubeThumbnailImageSrc.isEmpty()) {
                youtubeThumbnailImagesetVisibility = 8;
                bundle.putInt("youtubeThumbnailImageSetVisibility",
                        youtubeThumbnailImagesetVisibility);
            } else {
                bundle.putString("youtubeThumbnailImageSrc", youtubeThumbnailImageSrc);
                bundle.putString("youTubeLink", youTubeLink);
            }

//             String imageSrc = elements.get(0).attr("src");
//             bundle.putString("blogImage",imageSrc);

            detailsFragment.setArguments(bundle);

            FragmentManager fragmentManager = ((Activity)context).getFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.nav_view,detailsFragment);
            fragmentTransaction.addToBackStack(null);
            fragmentTransaction.commit();
        });

    }

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

    public class PostViewHolder extends RecyclerView.ViewHolder {

        ImageView postImage;
        TextView postTitle;
        TextView postDescription;

        public PostViewHolder(View itemView) {
            super(itemView);
            postImage = (ImageView) itemView.findViewById(R.id.postImage);
            postTitle = (TextView) itemView.findViewById(R.id.postTitle);
            postDescription = (TextView) itemView.findViewById(R.id.postDescription);

        }
    }
}

DetailsActivity 片段

    public class DetailsFragment extends android.app.Fragment {

    private TextView titleTextView, contentTextView;
    //   private ImageView blogImage;
    private PicassoImageGetter imageGetter;
    private ImageView youtubeThumbnailImage;
    private FloatingActionButton fab;
    private ScrollView scrollView;
    private SpinKitView spinKitView;
    private Button visitSite;
    private View view;
    private String url,title,content, youtubeThumbnailImageSrc, youTubeLink,sharingContent;
    private int youtubeThumbnailImageSetVisibility;

    public DetailsFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_details, container, false);
                spinKitView = (SpinKitView) view.findViewById(R.id.spin_kit);
        scrollView = (ScrollView) view.findViewById(R.id.scrollView);
        titleTextView = (TextView) view.findViewById(R.id.titleTextView);
        contentTextView = (TextView)view.findViewById(R.id.blogContent);
        fab = (FloatingActionButton) view.findViewById(R.id.fab);
        youtubeThumbnailImage = (ImageView) view.findViewById(R.id.youtubeThumbnailImage);
        visitSite = (Button) view.findViewById(R.id.visitSite);

        if(getArguments() != null){
            Bundle bundle = getArguments();
            url = bundle.getString("url");
            title = bundle.getString("itemTitle");
            content = bundle.getString("content");
            youtubeThumbnailImageSrc = bundle.getString("youtubeThumbnailImageSrc");
            youTubeLink = bundle.getString("youTubeLink");
            youtubeThumbnailImageSetVisibility = bundle.getInt("youtubeThumbnailImageSetVisibility");

        }

//        blogImage = (ImageView) findViewById(R.id.blogImage);

        spinKitView.setVisibility(View.VISIBLE);

        titleTextView.setText(title);
        contentTextView.setMovementMethod(LinkMovementMethod.getInstance());


        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            scrollView.setOnScrollChangeListener((v, scrollX, scrollY, oldScrollX, oldScrollY) -> {
                //   Log.d("ScrollView","scrollX_"+scrollX+"_scrollY_"+scrollY+"_oldScrollX_"+oldScrollX+"_oldScrollY_"+oldScrollY);
                if (scrollY > 0 && fab.isShown()) {
                    fab.hide();
                } else if (scrollY < 22) {
                    fab.show();

                }
            });
        } else {
            scrollView.getViewTreeObserver().addOnScrollChangedListener(() -> {
                int mScrollY = scrollView.getScrollY();
                if (mScrollY > 0 && fab.isShown()) {
                    fab.hide();
                } else if (mScrollY < 22) {
                    fab.show();
                }
            });
        }

        fab.setOnClickListener(view -> {
            sharingContent = "\n" + url;
            Intent sharingIntent = new Intent(Intent.ACTION_SEND);
            sharingIntent.setType("text/plain");
            sharingIntent.putExtra(Intent.EXTRA_TEXT,sharingContent);
            sharingIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
            startActivity(Intent.createChooser(sharingIntent, "Share via"));
        });

        //       String imageSrc = getIntent().getStringExtra("blogImage");
        //       Glide.with(getApplicationContext()).load(imageSrc).into(blogImage);

      youtubeThumbnailImage.setVisibility(youtubeThumbnailImageSetVisibility);
        youtubeThumbnailImage.setAdjustViewBounds(true);
        Picasso.get().load(youtubeThumbnailImageSrc).into(youtubeThumbnailImage);

        youtubeThumbnailImage.setOnClickListener(view -> {
            Intent youTube = new Intent
                    (Intent.ACTION_VIEW, Uri.parse(youTubeLink));
            startActivity(youTube);
        });

        imageGetter = new PicassoImageGetter(contentTextView, getActivity());
        Spannable html;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
            html = (Spannable) Html.fromHtml(content, Html.FROM_HTML_MODE_LEGACY, imageGetter, null);
        } else {
            html = (Spannable) Html.fromHtml(content, imageGetter, null);
        }

        contentTextView.setText(html);
        spinKitView.setVisibility(View.GONE);

        visitSite.setOnClickListener(view -> {
            Bundle bundle = new Bundle();
            bundle.putString("url", url );

            VisitSiteFragment visitSiteFragment = new VisitSiteFragment();
            visitSiteFragment.setArguments(bundle);

            FragmentManager manager = getFragmentManager();
            FragmentTransaction fragmentTransaction = manager.beginTransaction();

            fragmentTransaction.replace(R.id.detailsFragment,visitSiteFragment);
            fragmentTransaction.addToBackStack(null);
            fragmentTransaction.commit();
        });
        return view;
    }

}

我尝试使用 android.support.v4.app 并替换此行

FragmentManager fragmentManager = ((Activity)context).getFragmentManager();

有了这个

FragmentManager fragmentManager = ((AppCompatActivity)context).getSupportFragmentManager();

如本中所述，但这也不起作用

Answer 1

在 onBindViewHolder 中，您必须像这样实现它：

holder.nameImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
             ...
            //Toast.makeText(mContext,position+  " pozicioni",Toast.LENGTH_LONG).show();
        }
    });

你必须替换“nameImage”的地方。

Answer 2

已解决

这一行问题的原因

fragmentTransaction.replace(R.id.nav_view,detailsFragment);

我试图替换导航抽屉视图，但我应该放置包含 recyclerView 的视图

fragmentTransaction.replace(R.id.parentLayout,detailsFragment);

Answer 3

在 activity class

上调用片段

片段应附加到活动。在您的 activity 中创建一个接口来实现它，然后在您的适配器中初始化该接口。在 clickListener 中调用该方法，然后您可以在 activity 中通过单击调用的正确方法中执行任何操作。

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

       yourInterface.OnItemclick();

    }
});

确保对其进行初始化。

单击支架上的 itemView 时无法打开片段

Cannot open fragment when click on itemView on holder

android

android-fragments

android-activity

android-fragmentactivity

android-recyclerview