如何在另一个recyclerView中添加一个recyclerView [英] How to add a recyclerView inside another recyclerView
本文介绍了如何在另一个recyclerView中添加一个recyclerView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我打算开发一个在recyclerCardView中显示一些动态数据的应用程序.所以我决定添加一个名为CheckBoxRecyclerView的recyclerView
在我的主recyclerView中.这是我的应用程序代码:
I'm planning to develop an app that shows some dynamic data inside a recyclerCardView. So i decided add a recyclerView called CheckBoxRecyclerView
inside my main recyclerView. This is my code for my app :
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{
}
它是布局文件:
<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">
在此recyclerView中还有另一个:
and inside this recyclerView there is another:
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/reminder_card"
card_view:cardCornerRadius="2dp"
card_view:cardElevation="4dp"
card_view:cardUseCompatPadding="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="16dp"
android:paddingLeft="8dp">
<com.smflog.sreminder.utils.TitleView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/reminder_title"
android:paddingTop="8dp"
android:text="Wellcome To Google Keep !"
android:textSize="15dp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:orientation="horizontal">
<android.support.v7.widget.RecyclerView
android:layout_width="wrap_content"
android:id="@+id/checkbox_recycler_view"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
他们的适配器，主要(RAdapter):
Their adapters, Main ( RAdapter ) :
public 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();
}
}
第二个适配器:
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();
}
}
还有我的问题:正如您在CAdapter中看到的那样，仅显示构造函数的 Log 消息.
And my problem: as you see in CAdapter, only constructor's Log message displayed.
更新:如果还有另一种方式可以在另一张动态卡中显示一些动态数据，如果可以，最好使用它代替recyclerView?
有人帮我吗?
输出:应用程序输出
如您所见，仅适用于RAdapter的setTitle.
UPDATE: if there is another way to display some dynamic data inside another dynamic card if yes is it better to use it instead of recyclerView?
anyone help me?
The output : Application output
as you see just the setTitle for RAdapter works.
推荐答案
我建议使用单个RecyclerView并动态填充列表项.我添加了一个 github项目来描述如何做到这一点.您可能会看一下.尽管其他解决方案也可以正常工作，但我想建议一下，这是一种在RecyclerView中显示多个列表的更快，更有效的方法.
I would like to suggest to use a single RecyclerView and populate your list items dynamically. I've added a github project to describe how this can be done. You might have a look. While the other solutions will work just fine, I would like to suggest, this is a much faster and efficient way of showing multiple lists in a RecyclerView.
这个想法是在onCreateViewHolder和onBindViewHolder方法中添加逻辑，以便您可以为RecyclerView中的确切位置充气适当的视图.
The idea is to add logic in your onCreateViewHolder and onBindViewHolder method so that you can inflate proper view for the exact positions in your RecyclerView.
我还添加了示例项目以及该Wiki.您可能会克隆并检查其功能.为了方便起见，我将发布使用的适配器.
I've added a sample project along with that wiki too. You might clone and check what it does. For convenience, I am posting the adapter that I have used.
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);
}
}
还有另一种将项目保留在单个对象中的方法，因此您可以设置一个属性来标记项目，以指示哪个项目来自第一个列表，哪个项目属于第二个列表.然后将该ArrayList传递到您的RecyclerView中，然后实现适配器内部的逻辑以动态填充它们.
There is another way of keeping your items in a single ArrayList of objects so that you can set an attribute tagging the items to indicate which item is from first list and which one belongs to second list. Then pass that ArrayList into your RecyclerView and then implement the logic inside adapter to populate them dynamically.
希望有帮助.
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