How to add a recyclerView inside another recyclerView
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 :
My Main Activity :
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{
}
And it's layout file :
<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">
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>
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();
}
}
And second Adapter :
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();
}
}
And my problem: as you see in CAdapter, only constructor's Log message displayed.
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.
Answer
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.
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.
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);
}
}
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.
Hope that helps.