回收者视图上下文操作模式的问题

Question

我在我的回收站视图中实现了一个上下文操作栏，长按该行。在这里，我在操作模式下为每一行显示一个复选框。并根据标志隐藏以检查它是否不是动作模式。问题是在操作模式下，只有一行显示长按复选框，其余行隐藏它。我不确定它有什么问题。我正在附加我的 Recycler 适配器 class 和相应的行 XML here。请看一下，如果您能找到问题所在，请告诉我。

提前致谢！

正如某些机构建议的那样，在此处显示代码而不是指向 java 文件。这是代码

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerViewHolder> {

    Context context;
    List<RssFeed> feeds;
    Database database;
    FirebaseData db;
    String uid;
    private static final String TAG = Constants.TAG + " : " + RecyclerViewAdapter.class.getSimpleName();

    public RecyclerViewAdapter(Context context, List<RssFeed> feeds) {
        this.context = context;
        this.feeds = feeds;
        database = new Database(context);
        db = new FirebaseData(context);
        uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
    }

    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.edit_rss_feed_row, parent, false);
        final RecyclerViewHolder holder = new RecyclerViewHolder(view, (Activity) context, RecyclerViewAdapter.this);

        return holder;
    }

    @Override
    public void onBindViewHolder(final RecyclerViewHolder holder, int position) {
        holder.title.setText(feeds.get(position).getRssFeedTitle());
        holder.address.setText(feeds.get(position).getRssFeedAddress());

        if (!holder.action_mode)
            holder.checkBox.setVisibility(View.GONE);
        else {
            holder.checkBox.setVisibility(View.VISIBLE);
            holder.checkBox.setChecked(false);
        }


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

                AlertDialog.Builder dialog = new AlertDialog.Builder(context);
                dialog.setTitle(context.getString(R.string.rss_delete_alert_title));
                dialog.setMessage(context.getString(R.string.rss_delete_alert_msg));
                final int position = holder.getAdapterPosition();
                dialog.setNegativeButton(context.getString(R.string.no), null);
                dialog.setPositiveButton(context.getString(R.string.yes), new AlertDialog.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        RssFeed feed = feeds.get(position);
                        deleteFeed(feed);
                        feeds = new Database(context).getRssFeeds(SharedPrefUtil.getUtil(context, uid).getUserInfo());
                        notifyDataSetChanged();
                    }
                });
                dialog.show();

            }
        });

    }

    private void deleteFeed(RssFeed feed){
        database.deleteRssFeed(feed);
        db.deleteRssFeed(feed);
    }

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

    public void removeFeeds(List<RssFeed> list) {
        for (RssFeed feed : list)
            feeds.remove(feed);
        notifyDataSetChanged();
    }

    class RecyclerViewHolder extends RecyclerView.ViewHolder {

        TextView title;
        TextView address;
        RelativeLayout row;
        CheckBox checkBox;
        boolean action_mode = false;
        ActionMode actionMode;
        Activity activity;
        RecyclerViewAdapter recyclerViewAdapter;
        final ArrayList<RssFeed> removedList = new ArrayList<>();


        public RecyclerViewHolder(View item, final Activity activity, RecyclerViewAdapter rView) {
            super(item);

            this.activity = activity;
            recyclerViewAdapter = rView;
            row = item.findViewById(R.id.row);
            title = item.findViewById(R.id.rssEditFeedTitle);
            address = item.findViewById(R.id.rssEditFeedAddress);
            checkBox = item.findViewById(R.id.checkBox);

            row.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {

                    actionMode = ((AppCompatActivity)activity).startSupportActionMode(new ContextualCallBack(RecyclerViewHolder.this));

                    return true;
                }
            });
            checkBox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (((CheckBox) v).isChecked())
                        removedList.add(feeds.get(getAdapterPosition()));
                    else removedList.remove(feeds.get(getAdapterPosition()));
                }
            });
        }

    }

    class ContextualCallBack implements ActionMode.Callback {

        RecyclerViewHolder holder;

        ContextualCallBack(RecyclerViewHolder holder) {
            this.holder = holder;
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            mode.getMenuInflater().inflate(R.menu.edit_rss_feed_action_mode_menu, menu);
            holder.action_mode = true;
            holder.recyclerViewAdapter.notifyDataSetChanged();
            return true;
        }

        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            mode.setTitle(R.string.app_name);
            return false;
        }

        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            int id = item.getItemId();
            if (id == R.id.delete) {
                holder.recyclerViewAdapter.removeFeeds(holder.removedList);
                for(RssFeed feed:holder.removedList)
                    holder.recyclerViewAdapter.deleteFeed(feed);
                holder.recyclerViewAdapter.notifyDataSetChanged();
            }
            return false;
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            holder.action_mode = false;
            holder.recyclerViewAdapter.notifyDataSetChanged();
        }
    }
}

这里是每行 XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/row"
    android:descendantFocusability="blocksDescendants"
    tools:context="com.rss.feedster.rss_feedster.EditRssFeedFragment">


    <EditText
        android:id="@+id/rssEditFeedTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:text="Title RSS Feed"
        android:textAppearance="@android:style/TextAppearance.DeviceDefault.Medium"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/rssEditFeedAddress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/rssEditFeedTitle"
        android:layout_alignLeft="@id/rssEditFeedTitle"
        android:text="Description Text View"
        android:textAppearance="@android:style/TextAppearance.Small" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_marginRight="15dp"
        android:text="Tab to remove" />

    <CheckBox
        android:id="@+id/checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/textView2"
        android:layout_below="@+id/rssEditFeedTitle"
        android:visibility="visible"/>


</RelativeLayout>

更多信息： 我忘记包括的一件事是回收器视图正在导航抽屉布局的片段中使用。

Answer 1

终于明白这里的错误了。我将标志 (action_mode) 用于检查它是否是动作模式，放在 holder 对象本身内部，这意味着该标志一次只能用于单个 holder 对象（行）。当我将它移动到适配器对象时，一切都运行得很好。

回收者视图上下文操作模式的问题

Issue with recycler view contextual action mode

android

contextual-action-bar

android-recyclerview