Java 如何在另一个recyclerView中添加recyclerView

我计划开发一个应用程序，在

recyclerCardView

中显示一些动态数据。所以我决定添加一个名为

CheckBoxRecyclerView

在我的主

回收视图中

。这是我的应用程序代码：

我的主要活动：

setContentView(R.layout.activity_startup);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
reminderView = (RecyclerView) findViewById(R.id.reminder_recycler_view);
RlayoutManager = new LinearLayoutManager(this);
reminderView.setLayoutManager(RlayoutManager);

setSupportActionBar(toolbar);
cardView = (CardView) findViewById(R.id.card_first);
cardView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(getApplicationContext() , ReminderActivity.class);
        startActivity(intent);
    }
});
ReminderHelper helper = new ReminderHelper(getApplicationContext());
ReminderAdapter reminderAdapter = new ReminderAdapter(helper);
ContentValues reminderValues = new ContentValues();
ContentValues checkboxValues = new ContentValues();
// Devlopment Part ->
reminderValues.put("reminderTitle" , "A Reminder Title");
reminderValues.put("reminderLastModDate" , 0);
reminderValues.put("reminderAlarm" , 0);
reminderValues.put("reminderPicURI" , "skjshksjh");
reminderValues.put("ReminderBackground" , "#00796b");
checkboxValues.put("checkboxText" , "This is a CheckBox");
checkboxValues.put("isDone" , false);
checkboxValues.put("checkboxReminderID" , 0);
reminderAdapter.INSERT_REMINDER(reminderValues);
reminderAdapter.INSERT_CHECKBOX(checkboxValues);
File dbPath = getApplicationContext().getDatabasePath(ReminderHelper.DATABASE_NAME);
if(dbPath.exists()){
    List<Reminder> reminders = new ReminderAdapter(helper).getAllReminders();
    List<CheckBoxItem> checkBoxItems = new ReminderAdapter(helper).getAllCheckBoxes();
    RAdapter = new RAdapter(reminders , getApplicationContext() , checkBoxItems);
    reminderView.setAdapter(RAdapter);
}else{

}

setContentView（R.layout.activity\u启动）；
Toolbar Toolbar=（Toolbar）findViewById（R.id.Toolbar）；
reminderView=（RecyclerView）findViewById（R.id.Reminders\u recycler\u视图）；
RlayoutManager=新的LinearLayoutManager（本）；
提醒视图。设置布局管理器（RlayoutManager）；
设置支持操作栏（工具栏）；
cardView=（cardView）findViewById（R.id.card_优先）；
setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Intent Intent=new Intent（getApplicationContext（），rementeractivity.class）；
星触觉（意向）；
}
});
提醒帮助器=新的提醒帮助器（getApplicationContext（））；
ReminderAdapter ReminderAdapter=新的提醒适配器（帮助器）；
ContentValues提醒值=新ContentValues（）；
ContentValues checkboxValues=新ContentValues（）；
//开发部分->
提醒价值。放置（“提醒”、“提醒标题”）；
提醒值.put（“提醒LastModDate”，0）；
提醒值。放置（“提醒臂”，0）；
提醒值。put（“提醒值”、“skjshksjh”）；
reminderValues.put（“ReminderBackground”，“00796b”）；
checkboxValues.put（“checkboxText”，“这是一个复选框”）；
checkboxValues.put（“isDone”，false）；
checkboxValues.put（“checkboxrementerid”，0）；
提醒适配器。插入提醒（提醒值）；
reminderAdapter.INSERT_复选框（复选框值）；
文件dbPath=getApplicationContext（）.getDatabasePath（rementerHelper.DATABASE_NAME）；
if（dbPath.exists（））{
列表提醒=新建提醒适配器（helper）.getAllMembers（）；
List checkBoxItems=新的提醒适配器（helper）.getAllCheckBoxes（）；
RAdapter=新RAdapter（提醒、getApplicationContext（）、复选框项）；
提醒查看设置适配器（RAdapter）；
}否则{
}

它的布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="8dp"
    android:paddingLeft="8dp"
    android:paddingRight="8dp"
    android:paddingTop="8dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.smflog.sreminder.StartupActivity"
    tools:showIn="@layout/app_bar_startup">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:id="@+id/reminder_recycler_view"
        android:scrollbars="vertical"
        android:layout_height="match_parent">

正如您所看到的，RAdapter的setTitle起作用。
您可以使用LayoutInflater将动态数据膨胀为布局文件

更新：首先在CardView的布局中创建一个线性布局，并为其分配一个ID。
然后创建一个要充气的布局文件。最后，在“RAdaper”类中的
onBindViewHolder
方法中。编写以下代码：

  mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

  view = mInflater.inflate(R.layout.my_list_custom_row, parent, false);

之后，您可以初始化数据并使用RAdapter数据单击侦听器。希望能有帮助

可能有用：）
不久前我遇到了类似的问题，我的情况是外部回收器视图工作得很好，但是内部/第二个回收器视图的适配器有一些小问题，所有的方法都启动了构造函数，甚至调用了getCount（）方法，虽然最终方法负责生成视图ie

1。从未调用onBindViewHolder（）方法。-->问题1。

2。当它最终被调用时，它从不显示回收器视图的列表项/行。-->问题2。

发生这种情况的原因：当您将一个回收器视图放在另一个回收器视图中时，第一个/外部回收器视图的高度不会自动调整。它是在创建第一个/外部视图时定义的，然后保持固定状态。此时，您的第二个/内部回收器视图尚未加载其项目，因此其高度设置为零，即使在获取数据时也不会更改。然后，当调用第二个/内部回收器视图中的onBindViewHolder（）时，它会获取项目，但没有空间显示它们，因为其高度仍然为零。因此，即使onBindViewHolder（）将项目添加到第二个recycler视图中，也不会显示它们

解决方案：：您必须为第二个回收器视图创建自定义LinearLayoutManager，就是这样。
要创建自己的LinearLayoutManager：创建一个名为
CustomLinearLayoutManager
的Java类，并将下面的代码粘贴到其中无需更改

公共类CustomLinearLayoutManager扩展了LinearLayoutManager{
私有静态最终字符串标记=CustomLinearLayoutManager.class.getSimpleName（）；
公共CustomLinearLayoutManager（上下文）{
超级（上下文）；
}
公共CustomLinearLayoutManager（上下文上下文、int方向、布尔反转）{
超级（上下文、方向、反转）；
}
私有int[]mMeasuredDimension=新int[2]；
@凌驾
测量时的公共空隙（RecyclerView.Recycler Recycler，RecyclerView.State State，int widthSpec，int heightSpec）{
最终int-widthMode=View.MeasureSpec.getMode（widthmspec）；
最终int heightMode=View.MeasureSpec.getMode（heightSpec）；
最终int-widthSize=View.MeasureSpec.getSize（widthSpec）；
最终int heightSize=View.MeasureSpec.getSize（heightSpec）；
整数宽度=0；
整数高度=0；
对于（int i=0；ipublic class RAdapter extends RecyclerView.Adapter<RAdapter.ViewHolder> {
    List<Reminder> reminder;
    private Context context;
    private LinearLayoutManager lln;
    private CAdapter checkBoxAdapter;
    private List<CheckBoxItem> checkBoxItems;
    public static class ViewHolder extends RecyclerView.ViewHolder {
        public CardView rCardView;
        public RecyclerView recyclerView;
        public TitleView rTitleView;
        public ViewHolder(View itemView) {
            super(itemView);
            rCardView = (CardView) itemView.findViewById(R.id.reminder_card);
            rTitleView = (TitleView) itemView.findViewById(R.id.reminder_title);
            recyclerView = (RecyclerView) itemView.findViewById(R.id.checkbox_recycler_view);
        }
    }

    public RAdapter(List<Reminder> reminder, Context context, List<CheckBoxItem> checkBoxItems) {
        this.reminder = reminder;
        this.context = context;
        this.checkBoxItems = checkBoxItems;
    }

    @Override
    public RAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.reminder_card, parent, false);
        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

    @Override
    public void onBindViewHolder(RAdapter.ViewHolder holder, int position) {
        lln = new LinearLayoutManager(context);
        holder.recyclerView.setLayoutManager(lln);
        checkBoxAdapter = new CAdapter(checkBoxItems, context);
        holder.recyclerView.setAdapter(checkBoxAdapter);
        holder.rCardView.setCardBackgroundColor(Color.parseColor("#00796b"));
        holder.rTitleView.setText(reminder.get(position).getReminderTitle());
    }

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

public class CAdapter extends RecyclerView.Adapter<CAdapter.ViewHolder> {
    List<CheckBoxItem> checkBoxItems;
    Context context;

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TitleView checkBoxTitle;
        public ImageView deleteCheckBox;
        public CheckBox checkBoxCheckBox;

        public ViewHolder(View itemView) {
            super(itemView);
            checkBoxTitle = (TitleView) itemView.findViewById(R.id.checkbox_item_text);
            checkBoxCheckBox = (CheckBox) itemView.findViewById(R.id.checkbox_item_checkbox);
            Log.d("CAdapterLog", "Adpater Holded !!!!! :( ");
            deleteCheckBox = (ImageView) itemView.findViewById(R.id.btn_delete_checkbox);
        }
    }

    public CAdapter(List<CheckBoxItem> checkBoxItems, Context context) {
        this.checkBoxItems = checkBoxItems;
        this.context = context;
        Log.d("CAdapterLog", "Adpater Created !!!!! :( ");
    }


    @Override
    public CAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.checkbox_item, parent, false);
        ViewHolder vh = new ViewHolder(v);
        Log.d("CAdapterLog", "Adpater ViewHolded :( !!!!! :( ");
        return vh;
    }

    @Override
    public void onBindViewHolder(CAdapter.ViewHolder holder, int position) {
        Boolean isCheckboxChecked = Boolean.parseBoolean(checkBoxItems.get(position).getCheckBoxIsDone());
        String checkBoxText = checkBoxItems.get(position).getCheckBoxBody();
        Log.d("CAdapterLog", "Adpater Binded :( ");
        final int checkboxID = Integer.parseInt(checkBoxItems.get(position).getCheckBoxID());
        int reminderCheckBoxID = Integer.parseInt(checkBoxItems.get(position).getCheckBoxReminderID());
        holder.deleteCheckBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("CAdapterLog", "Cross Button Clicked !");
            }
        });
        holder.checkBoxCheckBox.setChecked(isCheckboxChecked);
        holder.checkBoxTitle.setText(checkBoxText);
    }

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

}

  mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

  view = mInflater.inflate(R.layout.my_list_custom_row, parent, false);

public class CustomLinearLayoutManager extends LinearLayoutManager {

    private static final String TAG = CustomLinearLayoutManager.class.getSimpleName();

    public CustomLinearLayoutManager(Context context) {
        super(context);

    }

    public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    private int[] mMeasuredDimension = new int[2];

    @Override
    public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) {

        final int widthMode = View.MeasureSpec.getMode(widthSpec);
        final int heightMode = View.MeasureSpec.getMode(heightSpec);
        final int widthSize = View.MeasureSpec.getSize(widthSpec);
        final int heightSize = View.MeasureSpec.getSize(heightSpec);

        int width = 0;
        int height = 0;
        for (int i = 0; i < getItemCount(); i++) {
            measureScrapChild(recycler, i, View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
                    View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
                    mMeasuredDimension);


            if (getOrientation() == HORIZONTAL) {
                width = width + mMeasuredDimension[0];
                if (i == 0) {
                    height = mMeasuredDimension[1];
                }
            } else {
                height = height + mMeasuredDimension[1];
                if (i == 0) {
                    width = mMeasuredDimension[0];
                }
            }
        }
        switch (widthMode) {
            case View.MeasureSpec.EXACTLY:
                width = widthSize;
            case View.MeasureSpec.AT_MOST:
            case View.MeasureSpec.UNSPECIFIED:
        }

        switch (heightMode) {
            case View.MeasureSpec.EXACTLY:
                height = heightSize;
            case View.MeasureSpec.AT_MOST:
            case View.MeasureSpec.UNSPECIFIED:
        }

        setMeasuredDimension(width, height);
    }

    private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
                                   int heightSpec, int[] measuredDimension) {
        try {
            View view = recycler.getViewForPosition(position);

            if (view != null) {
                RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();

                int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
                        getPaddingLeft() + getPaddingRight(), p.width);

                int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
                        getPaddingTop() + getPaddingBottom(), p.height);

                view.measure(childWidthSpec, childHeightSpec);
                measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
                measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
                recycler.recycleView(view);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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

    private static final int FOOTER_VIEW = 1;
    private static final int FIRST_LIST_ITEM_VIEW = 2;
    private static final int FIRST_LIST_HEADER_VIEW = 3;
    private static final int SECOND_LIST_ITEM_VIEW = 4;
    private static final int SECOND_LIST_HEADER_VIEW = 5;

    private ArrayList<ListObject> firstList = new ArrayList<ListObject>();
    private ArrayList<ListObject> secondList = new ArrayList<ListObject>();

    public DynamicListAdapter() {
    }

    public void setFirstList(ArrayList<ListObject> firstList) {
        this.firstList = firstList;
    }

    public void setSecondList(ArrayList<ListObject> secondList) {
        this.secondList = secondList;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        // List items of first list
        private TextView mTextDescription1;
        private TextView mListItemTitle1;

        // List items of second list
        private TextView mTextDescription2;
        private TextView mListItemTitle2;

        // Element of footer view
        private TextView footerTextView;

        public ViewHolder(final View itemView) {
            super(itemView);

            // Get the view of the elements of first list
            mTextDescription1 = (TextView) itemView.findViewById(R.id.description1);
            mListItemTitle1 = (TextView) itemView.findViewById(R.id.title1);

            // Get the view of the elements of second list
            mTextDescription2 = (TextView) itemView.findViewById(R.id.description2);
            mListItemTitle2 = (TextView) itemView.findViewById(R.id.title2);

            // Get the view of the footer elements
            footerTextView = (TextView) itemView.findViewById(R.id.footer);
        }

        public void bindViewSecondList(int pos) {

            if (firstList == null) pos = pos - 1;
            else {
                if (firstList.size() == 0) pos = pos - 1;
                else pos = pos - firstList.size() - 2;
            }

            final String description = secondList.get(pos).getDescription();
            final String title = secondList.get(pos).getTitle();

            mTextDescription2.setText(description);
            mListItemTitle2.setText(title);
        }

        public void bindViewFirstList(int pos) {

            // Decrease pos by 1 as there is a header view now.
            pos = pos - 1;

            final String description = firstList.get(pos).getDescription();
            final String title = firstList.get(pos).getTitle();

            mTextDescription1.setText(description);
            mListItemTitle1.setText(title);
        }

        public void bindViewFooter(int pos) {
            footerTextView.setText("This is footer");
        }
    }

    public class FooterViewHolder extends ViewHolder {
        public FooterViewHolder(View itemView) {
            super(itemView);
        }
    }

    private class FirstListHeaderViewHolder extends ViewHolder {
        public FirstListHeaderViewHolder(View itemView) {
            super(itemView);
        }
    }

    private class FirstListItemViewHolder extends ViewHolder {
        public FirstListItemViewHolder(View itemView) {
            super(itemView);
        }
    }

    private class SecondListHeaderViewHolder extends ViewHolder {
        public SecondListHeaderViewHolder(View itemView) {
            super(itemView);
        }
    }

    private class SecondListItemViewHolder extends ViewHolder {
        public SecondListItemViewHolder(View itemView) {
            super(itemView);
        }
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View v;

        if (viewType == FOOTER_VIEW) {
            v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_footer, parent, false);
            FooterViewHolder vh = new FooterViewHolder(v);
            return vh;

        } else if (viewType == FIRST_LIST_ITEM_VIEW) {
            v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_first_list, parent, false);
            FirstListItemViewHolder vh = new FirstListItemViewHolder(v);
            return vh;

        } else if (viewType == FIRST_LIST_HEADER_VIEW) {
            v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_first_list_header, parent, false);
            FirstListHeaderViewHolder vh = new FirstListHeaderViewHolder(v);
            return vh;

        } else if (viewType == SECOND_LIST_HEADER_VIEW) {
            v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_second_list_header, parent, false);
            SecondListHeaderViewHolder vh = new SecondListHeaderViewHolder(v);
            return vh;

        } else {
            // SECOND_LIST_ITEM_VIEW
            v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_second_list, parent, false);
            SecondListItemViewHolder vh = new SecondListItemViewHolder(v);
            return vh;
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {

        try {
            if (holder instanceof SecondListItemViewHolder) {
                SecondListItemViewHolder vh = (SecondListItemViewHolder) holder;
                vh.bindViewSecondList(position);

            } else if (holder instanceof FirstListHeaderViewHolder) {
                FirstListHeaderViewHolder vh = (FirstListHeaderViewHolder) holder;

            } else if (holder instanceof FirstListItemViewHolder) {
                FirstListItemViewHolder vh = (FirstListItemViewHolder) holder;
                vh.bindViewFirstList(position);

            } else if (holder instanceof SecondListHeaderViewHolder) {
                SecondListHeaderViewHolder vh = (SecondListHeaderViewHolder) holder;

            } else if (holder instanceof FooterViewHolder) {
                FooterViewHolder vh = (FooterViewHolder) holder;
                vh.bindViewFooter(position);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public int getItemCount() {

        int firstListSize = 0;
        int secondListSize = 0;

        if (secondList == null && firstList == null) return 0;

        if (secondList != null)
            secondListSize = secondList.size();
        if (firstList != null)
            firstListSize = firstList.size();

        if (secondListSize > 0 && firstListSize > 0)
            return 1 + firstListSize + 1 + secondListSize + 1;   // first list header, first list size, second list header , second list size, footer
        else if (secondListSize > 0 && firstListSize == 0)
            return 1 + secondListSize + 1;                       // second list header, second list size, footer
        else if (secondListSize == 0 && firstListSize > 0)
            return 1 + firstListSize;                            // first list header , first list size
        else return 0;
    }

    @Override
    public int getItemViewType(int position) {

        int firstListSize = 0;
        int secondListSize = 0;

        if (secondList == null && firstList == null)
            return super.getItemViewType(position);

        if (secondList != null)
            secondListSize = secondList.size();
        if (firstList != null)
            firstListSize = firstList.size();

        if (secondListSize > 0 && firstListSize > 0) {
            if (position == 0) return FIRST_LIST_HEADER_VIEW;
            else if (position == firstListSize + 1)
                return SECOND_LIST_HEADER_VIEW;
            else if (position == secondListSize + 1 + firstListSize + 1)
                return FOOTER_VIEW;
            else if (position > firstListSize + 1)
                return SECOND_LIST_ITEM_VIEW;
            else return FIRST_LIST_ITEM_VIEW;

        } else if (secondListSize > 0 && firstListSize == 0) {
            if (position == 0) return SECOND_LIST_HEADER_VIEW;
            else if (position == secondListSize + 1) return FOOTER_VIEW;
            else return SECOND_LIST_ITEM_VIEW;

        } else if (secondListSize == 0 && firstListSize > 0) {
            if (position == 0) return FIRST_LIST_HEADER_VIEW;
            else return FIRST_LIST_ITEM_VIEW;
        }

        return super.getItemViewType(position);
    }
}