Android获取recyclerview项目和位置上选定的文本部分

在我的适配器中，可以选择显示弹出窗口的项目，例如copy, cut或等等，现在我怎样才能获得所选的文本部分recyclerView项目和位置？我阅读了更多有关找到此解决方案的文档，但我不知道该怎么做

这是我的适配器，我想获取文本和位置的选定部分：

public class ShowBookContentsAdapter extends RecyclerView.Adapter<ShowBookContentsAdapter.ShowBookContentsViewHolder> {
    private List<Contents> list;
    private Context        context;

    ...

    private fontFace setFontFace = fontFace.SHABNAM;

    public ShowBookContentsAdapter(List<Contents> items, Context mContext, IonChangeBottomViewVisibility mOnChangeBottomViewVisibility, IonSelectText mIonSelectText) {
        list = items;
        context = mContext;

        ionChangeBottomViewvisibility = mOnChangeBottomViewVisibility;
        ionSelectText = mIonSelectText;
    }

    @Override
    public ShowBookContentsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        int layout = -1;
        switch (viewType) {
            case 0:
                layout = R.layout.item_book_content_paragraph;
                break;
        }

        view = LayoutInflater.from(parent.getContext()).inflate(layout, parent, false);
        holder = new ShowBookContentsViewHolder(view);

        return holder;
    }

    @Override
    public void onBindViewHolder(ShowBookContentsViewHolder holder, final int position) {
        switch (list.get(position).getContentType()) {
            case 0:
                makeSelectable(holder.book_content_paragraph);
                implementingParagraphView(holder, position);
                break;
        }
    }

    private void implementingParagraphView(final ShowBookContentsViewHolder mHolder, final int position) {
        holder = mHolder;

        String content = list.get(position).getContent();
        mHolder.book_content_paragraph.removeAllViews();
        try {
            Reader reader = new StringReader(content);

            KetabkhanView         ketabkhan             = new KetabkhanView(context);
            KetabkhanTagProcessor ketabkhanTagProcessor = new KetabkhanTagProcessor();

            ketabkhanTagProcessor.parse(reader, ketabkhan);
            mHolder.book_content_paragraph.addView(ketabkhan);
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("E ", e.getMessage());
            throw new RuntimeException(e);
        }

        makeSelectable(mHolder.book_content_paragraph);

        if (setFontFace == fontFace.SHABNAM)
            Utils.overrideFonts(context, mHolder.book_content_paragraph, PersianFontType.SHABNAM);
        else if (setFontFace == fontFace.SAHEL)
            Utils.overrideFonts(context, mHolder.book_content_paragraph, PersianFontType.SAHEL);

        //for show and hide bottom view
        mHolder.book_content_paragraph.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ionChangeBottomViewvisibility != null) {
                    ionChangeBottomViewvisibility.onChange();
                }
            }
        });
    }

    ...
    private void makeSelectable(ViewGroup viewGroup) {
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            View child = viewGroup.getChildAt(i);
            if (child instanceof ViewGroup) {
                makeSelectable((ViewGroup) child);
            } else if (child instanceof TextView) {
                ((TextView) child).setTextIsSelectable(true);
                ((TextView) child).setTextSize(TypedValue.COMPLEX_UNIT_SP, textSize == 0 ? 14 : textSize);
            }
        }
    }

    @Override
    public int getItemViewType(int position) {
        return list.get(position).getContentType();
    }

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

    public int getItemPosition(int itemId) {
        return itemPositions.get(itemId);
    }

    public void setData(List<Contents> mContents) {
        list.clear();
        list.addAll(mContents);
    }

    public class ShowBookContentsViewHolder extends RecyclerView.ViewHolder {
        @Nullable
        @BindView(R.id.book_content_paragraph)
        LinearLayout book_content_paragraph;

        ...
        public ShowBookContentsViewHolder(View view) {
            super(view);
            ButterKnife.bind(this, view);
        }
    }
}

我通过这种方法在项目上制作可选择的文本：makeSelectable()

我已经使用自定义 ActionMode 回调实现了相同的功能。我们可以通过设置将自定义操作模式回调设置为回收器视图项的特定文本视图textView.customSelectionActionModeCallback在recyclerViewAdapter的onBindViewHolder中。在自定义回调中，我们可以使用当前位置和选定的文本。 onBindViewHolder 看起来像这样。

 public void onBindViewHolder(myViewHolder holder, int position) {
    //code
    holder.textview. setCustomSelectionActionModeCallback(new CustomSelectionCallback(holder.taskName, position, mContext));

}

在自定义回调中，我们可以发送任何内容以及项目的位置。 自定义选择回调可以按如下方式实现。

public class CustomSelectionCallback implements ActionMode.Callback {

private TextView mTextView;
private int position;
private Context mContext;

public CustomSelectionCallback(TextView text, int pos, Context context) {
    this.mTextView = text;
    this.position = pos;
    this.mContext = context;
}

@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
    int start = mTextView.getSelectionStart();
    int end = mTextView.getSelectionEnd();
    Spannable wordtoSpan = (Spannable) mTextView.getText();
    wordtoSpan.setSpan(new BackgroundColorSpan(Color.TRANSPARENT), start, end,
            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    //copy the text when Copy Action Mode is clicked
    if (item.getItemId() == android.R.id.copy) {
        copyText(start, end);
        mode.finish();
        return true;
    } else if (item.getItemId() == android.R.id.shareText) {
        shareText(start, end);
        mode.finish();
        return true;
    } else if (item.getItemId() == android.R.id.selectAll) {
        selectAllText();
        return true;
    }
    return true;

}

/**
 * implement select all functionality id ActionMOde Menu
 */
private void selectAllText() {
    Selection.setSelection((Spannable) mTextView.getText(), 0, mTextView.length());
}

private void shareText(int start, int end) {
    CharSequence selectedTxt = mTextView.getText().subSequence(start, end);
    String shareBody = selectedTxt.toString();
    Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
    sharingIntent.setType("text/plain");
    sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
    mContext.startActivity(Intent.createChooser(sharingIntent, "SHARE"));
}

@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
    return true;
}

@Override
public void onDestroyActionMode(ActionMode mode) {
}

@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
    return true;
}

/**
 * copy the selected text with start and end param to clipboard
 *
 * @param start start point of selection of the text view
 * @param end   end point of selection of the text view
 */
private void copyText(int start, int end) {
    ClipboardManager clipboardManager = (ClipboardManager) mContext.
            getSystemService(Context.CLIPBOARD_SERVICE);

    CharSequence selectedTxt = mTextView.getText().subSequence(start, end);
    ClipData clipData = ClipData.newPlainText("selected text label", selectedTxt);
    assert clipboardManager != null;
    clipboardManager.setPrimaryClip(clipData);
    Toast.makeText(mContext, selectedTxt.toString() + "   position  " + position, Toast.LENGTH_LONG).show();
}

}