Nested Recycler View, Child And Parent Remove Issue

Nested Recycler View, Child And Parent Remove Issue - java

I have created a Nested recycle rview with parent and child both dynamic.Addition to both Parent and Child is working fine.Deletion from child is working fine.I want to remove parent view when all the child views for the same is removed.Confused about how could i implement the same.
Here is the child Adapter
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private List<ToDoModel> values;
private Context context;
//private OnEditListener onEditListener;
AlertDialog alertDialog;
/*public MyAdapter(List<ToDoModel> context) {
this.values = context;
this.onEditListener = onEditListener;
}*/
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView txtHeader;
public TextView txtFooter;
public ImageView mIcon;
public View layout;
public ImageView deleteItem;
public CheckBox doneButton;
public ImageView editItem;
public ViewHolder(View v) {
super(v);
layout = v;
txtHeader = (TextView) v.findViewById(R.id.firstLine);
txtFooter = (TextView) v.findViewById(R.id.secondLine);
mIcon = (ImageView) v.findViewById(R.id.icon);
deleteItem = (ImageView) v.findViewById(R.id.deleteButton);
doneButton = (CheckBox) v.findViewById(R.id.checkBox);
editItem = (ImageView) v.findViewById(R.id.editButton);
}
}
public void add(int position, ToDoModel item) {
values.add(position, item);
sort();
notifyDataSetChanged();
//notifyItemInserted(position);
}
public void replace(ToDoModel item)
{
int editPos;
editPos = values.indexOf(item);
values.set(editPos,item);
sort();
notifyDataSetChanged();
}
public void sort() {
if ((int) values.size() > 1) {
Collections.sort(values);
}
}
public void remove(int position) {
values.remove(position);
notifyDataSetChanged();
}
public MyAdapter(List<ToDoModel> myDataset) {
values = myDataset;
}
#Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
LayoutInflater inflater = LayoutInflater.from(
parent.getContext());
View v =
inflater.inflate(R.layout.todo_row_view, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(ViewHolder holder, final int position) {
final ToDoModel toDoModel = values.get(position);
switch ((String) toDoModel.task) {
case "To Go":
holder.mIcon.setImageResource(R.drawable.ic_explore24px);
break;
case "To Get":
holder.mIcon.setImageResource(R.drawable.ic_shoppingbag24px);
break;
case "To Do":
holder.mIcon.setImageResource(R.drawable.ic_todo);
break;
default:
break;
}
holder.txtHeader.setText(toDoModel.header);
holder.txtFooter.setText(toDoModel.task + " | " + toDoModel.tod + " | " + toDoModel.footer);
holder.doneButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (buttonView.isChecked()) {
//holder.mIcon.setImageResource(R.drawable.ic_check_circle24px);
Toast.makeText(buttonView.getContext(), "Marked As Done", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(buttonView.getContext(), "Marked As UnDone", Toast.LENGTH_SHORT).show();
}
}
});
holder.deleteItem.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
View view = LayoutInflater.from(v.getContext()).inflate(R.layout.delete_promptdialog,null);
Button YesButton = (Button) view.findViewById(R.id.buttonYes);
Button NoButton = (Button) view.findViewById(R.id.buttonNo);
YesButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
remove(position);
Toast.makeText(v.getContext(), "List Item Removed", Toast.LENGTH_SHORT).show();
alertDialog.dismiss();
}
});
NoButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Delete Canceled", Toast.LENGTH_SHORT).show();
alertDialog.dismiss();
}
});
builder.setView(view);
alertDialog=builder.create();
alertDialog.show();
/*remove(position);
Toast.makeText(v.getContext(), "List Item Removed", Toast.LENGTH_SHORT).show();*/
}
});
/* holder.editItem.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
onEditListener.onEditClick(values.get(position));
//Toast.makeText(v.getContext(), "List Edit", Toast.LENGTH_SHORT).show();
}
});*/
}
/*public interface OnEditListener {
void onEditClick(ToDoModel currentData);
}*/
#Override
public int getItemCount() {
return values.size();
}
}
Here is the Parent Adapter
public class ParentAdapter extends RecyclerView.Adapter<ParentAdapter.ParentViewHolder> {
private RecyclerView.RecycledViewPool viewPool = new RecyclerView.RecycledViewPool();
public List<TodoParent> parentList;
public TodoParent todayList;
public static long todayEpochDate;
public ParentAdapter(List<TodoParent> parentList, MainFragment mainFragment) {
this.parentList = parentList;
}
public void add(int position, TodoParent item) {
parentList.add(position, item);
sort();
notifyDataSetChanged();
//notifyItemInserted(position);
}
public void sort() {
if ((int) parentList.size() > 1) {
Collections.sort(parentList);
//if(!(todayList.ParentTitle.isEmpty())) Collections.swap(parentList, parentList.indexOf(todayList), 0);
}
/* if ( todayList )
{
System.out.println("Entering Swap");
setToday(todayList);
}*/
}
public void setToday(TodoParent item) {
int todayPos;
todayPos = parentList.indexOf(item);
parentList.remove(todayPos);
notifyDataSetChanged();
parentList.add(0,item);
notifyDataSetChanged();
}
#NonNull
#Override
public ParentAdapter.ParentViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.todo_parent_view,parent,false);
ParentViewHolder vh = new ParentViewHolder(view);
return vh;
}
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onBindViewHolder(#NonNull ParentViewHolder holder, int position) {
TodoParent todoParent = parentList.get(position);
todoParent.ParentId = position;
Calendar mCal;
mCal = Calendar.getInstance();
int mDay = mCal.get(Calendar.DAY_OF_MONTH);
int mMonth = mCal.get(Calendar.MONTH);
int mYear = mCal.get(Calendar.YEAR);
String dateString = mDay +"/"+ (mMonth+1) +"/" + mYear;
try {
todayEpochDate = new SimpleDateFormat("dd/MM/yyyy").parse(dateString).getTime()/1000;
} catch (ParseException e) {
e.printStackTrace();
}
if((long)todayEpochDate == (long)todoParent.EpochTime)
{
holder.mTitle.setText("Today");
todayList = todoParent;
System.out.println("todayE:"+todayEpochDate);
System.out.println("SelectedE:"+todoParent.EpochTime);
}
else
{
holder.mTitle.setText(todoParent.ParentTitle);
System.out.println("today:"+todayEpochDate);
System.out.println("Selected:"+todoParent.EpochTime);
}
LinearLayoutManager layoutManager = new LinearLayoutManager(holder.childView.getContext(),
LinearLayoutManager.VERTICAL,false);
layoutManager.setInitialPrefetchItemCount(todoParent.mChildList.size());
holder.childView.setLayoutManager(layoutManager);
MyAdapter myAdapter = new MyAdapter(todoParent.mChildList);
holder.childView.setAdapter(myAdapter);
holder.childView.setRecycledViewPool(viewPool);
}
#Override
public int getItemCount() {
return parentList.size();
}
public class ParentViewHolder extends RecyclerView.ViewHolder {
public TextView mTitle;
public RecyclerView childView;
public ParentViewHolder(#NonNull View itemView) {
super(itemView);
mTitle = itemView.findViewById(R.id.mParentTitle);
childView = itemView.findViewById(R.id.mChildView);
}
}
}
remove for child is working fine. How to remove Parent here when there are no more child views?

Related

Transition between 2 recycler views having cards

I have 2 recycler views that have cards.They basically look the same have the same number of cards and everthing. The first one is for like viewing and other stuff and the second one is only for deleting cards. OnlongClicking a card in the first recycler view triggers the opening of the second recycler view. I wanted to add transitions in between them like what keep notes has done when a card is long clicked. Both the recycler view use the same adapter. I have set what the adapter should do based on passing context to the adapter. enter image description here this is my 1st layout having the 1st recycler view.enter image description here this is the 2nd layout having the second recycler view.I want like a seamless transition for the tool bar again just like what Google keeps has done.A simple solution would be preferred as I am very new to this stuff.
Here is the java code for the adapter.
public class Task_recycle_view_adapter extends RecyclerView.Adapter<Task_recycle_view_adapter.ViewHolder>{
private List<struct_task> task_list= new ArrayList<>();
private ArrayList<String> isSelected=new ArrayList<String>();
protected Context context1;
protected Context context2;
private String labelName;
private String taskName;
private ConstraintLayout label_menu_avatar;
public Task_recycle_view_adapter(Context context1,Context context2)
{
this.context1=context1;
this.context2=context2;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {//parent is the parent of the recycle view it is taken as an arg to use it to attach the every view to the parent view
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_task,parent,false);//to inflate a layout
ViewHolder holder= new ViewHolder(view);
return holder;
}
#RequiresApi(api = Build.VERSION_CODES.O)
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
holder.taskname.setText(task_list.get(position).getTask_name());
holder.taskid.setText(String.valueOf(task_list.get(position).getTask_id()));
if(context2==null && context1!=null) {
String taskName=task_list.get(position).getTask_name();
Long taskid=task_list.get(position).getTask_id();
String duedate=task_list.get(position).getDue_date();
holder.parent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DataBaseHelper dataBaseHelper = new DataBaseHelper(context1);
ArrayList<SubTaskModel> subtask_list=(ArrayList<SubTaskModel>) dataBaseHelper.getAllSubTasksFor(labelName, Long.parseLong(holder.taskid.getText().toString()));
Intent intent1 =new Intent(context1,ViewTaskActivity.class);
intent1.putExtra("label_name",labelName);
intent1.putExtra("task_id",taskid);
intent1.putExtra("task_name",taskName);
intent1.putExtra("due_date",duedate);
intent1.putParcelableArrayListExtra("subtask_list", (ArrayList<? extends Parcelable>) subtask_list);
context1.startActivity(intent1);
}
});
holder.parent.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
Intent intent2 = new Intent(context1, Delete_page_Activity.class);
intent2.putParcelableArrayListExtra("task_list", (ArrayList<? extends Parcelable>) task_list);
intent2.putExtra("label_name",labelName);
intent2.putExtra("selected_task",taskName);
Pair[] pairs = new Pair[1];
pairs[0]= new Pair<View,String>(label_menu_avatar,"transition1");
ActivityOptions options= ActivityOptions.makeSceneTransitionAnimation((Activity) context1,pairs);
context1.startActivity(intent2,options.toBundle());
return true;
}
});
}
if(context2!=null && context1==null)
{
if(taskName.equals(task_list.get(position).getTask_name()))
{
holder.active=1;
isSelected.add(holder.taskid.getText().toString());
holder.parent.findViewById(R.id.layout_for_every_task).setBackgroundResource(R.drawable.background_for_task_card);
}
holder.parent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(holder.active==0) {
isSelected.add(holder.taskid.getText().toString());
v.findViewById(R.id.layout_for_every_task).setBackgroundResource(R.drawable.background_for_task_card);
holder.active=1;
}
else {
isSelected.remove(holder.taskid.getText().toString());
v.findViewById(R.id.layout_for_every_task).setBackgroundResource(R.drawable.background_for_task_card_transparent);
holder.active=0;
}
}
});
}
// subtasks 1 to 5
if(task_list.get(position).getSubtask1()!=null)
holder.subtask1.setText(task_list.get(position).getSubtask1());
else
holder.subtask1.setVisibility(View.GONE);
if(task_list.get(position).getSubtask2()!=null)
holder.subtask2.setText(task_list.get(position).getSubtask2());
else
holder.subtask2.setVisibility(View.GONE);
if(task_list.get(position).getSubtask3()!=null)
holder.subtask3.setText(task_list.get(position).getSubtask3());
else
holder.subtask3.setVisibility(View.GONE);
if(task_list.get(position).getSubtask4()!=null)
holder.subtask4.setText(task_list.get(position).getSubtask4());
else
holder.subtask4.setVisibility(View.GONE);
if(task_list.get(position).getSubtask5()!=null)
holder.subtask5.setText(task_list.get(position).getSubtask5());
else
holder.subtask5.setVisibility(View.GONE);
// due date
if(task_list.get(position).getDue_date()!=null)
holder.duedate.setText(task_list.get(position).getDue_date());
else
holder.duedate.setVisibility(View.GONE);
// progress
holder.progresscircle.setProgress(task_list.get(position).getProgress());
}
#Override
public int getItemCount() {
return task_list.size();
}
public void setTask_list(List<struct_task> task_list) {
this.task_list = task_list;//to refresh the data inside the recycler view
}
#Override
public int getItemViewType(int position) {
return position;
}
public String getLabelName() {
return labelName;
}
public void setLabelName(String labelName) {
this.labelName = labelName;
}
public ArrayList<String> getIsSelected() {
return isSelected;
}
public String getTaskName() {
return taskName;
}
public void setTaskName(String taskName) {
this.taskName = taskName;
}
public void setLabel_menu_avatar(ConstraintLayout label_menu_avatar) {
this.label_menu_avatar = label_menu_avatar;
}
public static class ViewHolder extends RecyclerView.ViewHolder{// holds the view for every item inside the recycle view
private TextView taskname,taskid,duedate,subtask1,subtask2,subtask3,subtask4,subtask5;
private CardView parent;
private ProgressBar progresscircle;
public void setActive(int active) {
this.active = active;
}
private int active;
public ViewHolder(#NonNull View itemView) {
super(itemView);
taskid=itemView.findViewById(R.id.task_id);
taskname = itemView.findViewById(R.id.task_name);
parent = itemView.findViewById(R.id.card_for_every_task);
duedate = itemView.findViewById(R.id.due_date);
progresscircle = itemView.findViewById(R.id.progress_circular);
subtask1 = itemView.findViewById(R.id.subtask_1);
subtask2 = itemView.findViewById(R.id.subtask_2);
subtask3 = itemView.findViewById(R.id.subtask_3);
subtask4 = itemView.findViewById(R.id.subtask_4);
subtask5 = itemView.findViewById(R.id.subtask_5);
active=0;
}
}
}
Here is the code for the 1st activity i.e the 1st image:
public class TaskPageActivity extends AppCompatActivity {
private RecyclerView task_rv;//task recycler view
private FloatingActionButton addTask;
private long tasksNum;
private String labelName;
private DataBaseHelper dataBaseHelper = new DataBaseHelper(this);
private Task_recycle_view_adapter adapter= new Task_recycle_view_adapter(this,null);
private List<struct_task> tasks;
private EditText searchBar;
private ConstraintLayout search_btn;
private ConstraintLayout calendar_btn;
#RequiresApi(api = Build.VERSION_CODES.O)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_task_title);
getWindow().getSharedElementExitTransition();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
search_btn= findViewById(R.id.search_btn);
calendar_btn=findViewById(R.id.calendar_btn);
search_btn.setClickable(true);
search_btn.setFocusable(true);
labelName = getIntent().getExtras().getString("832715");
TextView txtLabelName = findViewById(R.id.Label_name);
txtLabelName.setText(labelName);
task_rv = findViewById(R.id.Recycle_view_task);
addTask = findViewById(R.id.add_task);
searchBar= (SearchBar) findViewById(R.id.search_bar);
tasksNum = getTasksNum(labelName, dataBaseHelper, adapter); //displays all tasks and return number of tasks
ConstraintLayout.LayoutParams params= (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
addTask.setOnClickListener(view -> {
tasksNum = getTasksNum(labelName, dataBaseHelper, adapter);
Intent intent = new Intent(TaskPageActivity.this, AddTaskPageActivity.class);
intent.putExtra("labelName", labelName);
intent.putExtra("taskID", tasksNum);
startActivity(intent);
});
search_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(searchBar.getVisibility()==View.INVISIBLE) {
search_btn.setAlpha(.5f);
searchBar.setVisibility(View.VISIBLE);
searchBar.requestFocus();
imm.showSoftInput(searchBar,InputMethodManager.SHOW_IMPLICIT);
ConstraintLayout.LayoutParams params= (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
params.verticalBias = .55f;
searchBar.setLayoutParams(params);
searchBar.requestFocus();
}
else {
searchBar.setVisibility(View.INVISIBLE);
search_btn.setAlpha(1.0f);
}
}
});
searchBar.setOnFocusChangeListener(new View.OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus) {
ConstraintLayout.LayoutParams params = (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
if(params.verticalBias==.9f) {
searchBar.requestFocus();
params.verticalBias = .55f;
searchBar.setLayoutParams(params);
}
searchBar.setOnKeyListener(new View.OnKeyListener() {
#Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if((event.getAction()==KeyEvent.ACTION_DOWN) && (keyCode==KeyEvent.KEYCODE_ENTER) && params.verticalBias==.55f)
{
ConstraintLayout.LayoutParams params = (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
searchBar.requestFocus();
params.verticalBias = .9f;
searchBar.setLayoutParams(params);
searchBar.clearFocus();
imm.hideSoftInputFromWindow(searchBar.getWindowToken(),0);
}
return false;
}
});
}
}
});
searchBar.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
filter(s.toString());
}
});
AlertDialog alertDialog = new AlertDialog.Builder(TaskPageActivity.this).create();
calendar_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(calendar_btn.getAlpha()==1.0f) {
calendar_btn.setAlpha(.5f);
LayoutInflater inflater = getLayoutInflater();
View view1 = inflater.inflate(R.layout.dialog_calendar,null);
alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
alertDialog.setView(view1);
CalendarView mCalendarView= view1.findViewById(R.id.calendar);
mCalendarView.setMinDate(Calendar.getInstance().getTimeInMillis());
alertDialog.show();
}
}
});
alertDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
if(calendar_btn.getAlpha()==.5f)
calendar_btn.setAlpha(1.0f);
}
});
}
private void filter(String string) {
ArrayList<struct_task> filteredList = new ArrayList<>();
for(struct_task item: tasks)
{
if(item.getTask_name().contains(string) || item.getTask_name().contains(string.toUpperCase()))
{
filteredList.add(item);
}
}
if(filteredList.size()!=0) {
adapter.setTask_list(filteredList);
task_rv.setAdapter(adapter);
}
}
#Override
public void onBackPressed() {
if(searchBar.getText().toString().length()!=0) {
showAllTasks(labelName, dataBaseHelper, adapter);
searchBar.setText(null);
searchBar.setVisibility(View.INVISIBLE);
search_btn.setAlpha(1.0f);
}
else if(searchBar.getText().toString().length()==0)
{
super.onBackPressed();
}
}
#Override
protected void onResume() {
ConstraintLayout.LayoutParams params = (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
showAllTasks(labelName, dataBaseHelper, adapter);
if(params.verticalBias==.54f) {
searchBar.requestFocus();
params.verticalBias = .9f;
searchBar.setLayoutParams(params);
searchBar.clearFocus();
}
if(searchBar.getText().toString().length()==0) {
showAllTasks(labelName, dataBaseHelper, adapter);
}
else {
filter(searchBar.getText().toString());
}
super.onResume();
}
private void showAllTasks(String labelName, DataBaseHelper dataBaseHelper, Task_recycle_view_adapter adapter) {
tasks = dataBaseHelper.getAllTasksFor(labelName);
adapter.setLabelName(labelName);
adapter.setTask_list(tasks);
task_rv.setAdapter(adapter);
task_rv.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
}
long getTasksNum(String labelName, DataBaseHelper dataBaseHelper, Task_recycle_view_adapter adapter) {
return dataBaseHelper.getLastTaskID(labelName)+1; //to determine ID of next task
}
#Override
protected void onUserLeaveHint() {
ConstraintLayout.LayoutParams params = (ConstraintLayout.LayoutParams) searchBar.getLayoutParams();
params.verticalBias=.9f;
searchBar.setLayoutParams(params);
searchBar.setText(null);
searchBar.clearFocus();
super.onUserLeaveHint();
}
}
And finally for the 2nd activity which is triggered by longclicking any card
public class Delete_page_Activity extends AppCompatActivity {
private Task_recycle_view_adapter recycle_view_adapter = new Task_recycle_view_adapter(null,this);
private ArrayList<String> delete_list=new ArrayList<>();
private DataBaseHelper dataBaseHelper = new DataBaseHelper(this);
private String labelName=null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_delete_page);
overridePendingTransition(0,0);
Toolbar toolbar=findViewById(R.id.toolbar_bar);
ImageView close_btn=findViewById(R.id.close_btn);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(null);
ArrayList<struct_task> task_list = getIntent().getParcelableArrayListExtra("task_list");
labelName=getIntent().getExtras().getString("label_name");
String task = getIntent().getExtras().getString("selected_task");
Log.e("test",labelName);
RecyclerView recyclerView = findViewById(R.id.delete_Recycler_View);
recycle_view_adapter.setTaskName(task);
recycle_view_adapter.setTask_list(task_list);
recyclerView.setAdapter(recycle_view_adapter);
recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
close_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.toolbar_menu,menu);
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch (item.getItemId())
{
case R.id.tool_bar_item1:
delete_list = recycle_view_adapter.getIsSelected();
if(delete_list.size()==0)
{
Toast toast1= new Toast(this);
toast1.setDuration(Toast.LENGTH_SHORT);
LayoutInflater inflater= (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view= inflater.inflate(R.layout.activity_toast_msg1,null);
view.setBackgroundResource(R.drawable.background_for_calendar);
toast1.setView(view);
toast1.show();
}
else {
for (int task = 0; task < delete_list.size(); task++) {
dataBaseHelper.deleteOneTask(labelName, Long.parseLong(delete_list.get(task)));
}
finish();
}
break;
case R.id.tool_bar_item2:
Boolean flag=dataBaseHelper.deleteAllCompletedTasks(labelName);
if(flag)
finish();
else
{
Toast toast2= new Toast(this);
toast2.setDuration(Toast.LENGTH_SHORT);
LayoutInflater inflater= (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view= inflater.inflate(R.layout.activity_toast_msg2,null);
view.setBackgroundResource(R.drawable.background_for_calendar);
toast2.setView(view);
toast2.show();
}
break;
}
return true;
}
}
I have added the code related to the scene transititon which is in the adapter.
here is a gif of the problem when i add a scene transition
enter image description here
As u can see there are 2 pauses when going from 1st to 2nd activity 1st pause being longer 2nd one shorter. And also a pause when exiting the 2nd activity which seems to have the same duration as the 2nd pause.

How Do I Add Multiple CardView Layouts To A RecyclerView?

Here is a video of the behavior of the app that I am trying to explain just in case if you didn't understand my explanation of the problem. See the link below...
https://file.re/2021/09/14/2021-09-1405-16-22/
I am trying to develop an android app that has several card view layouts that will be displayed in one recycler view. I am not having much luck getting the recycler view to list the layouts like I want it to. I can add the first layout just fine, and then add the second layout just as long as the first card view layout exists in the recycler view. If it doesn't exists in the recycler view, and I try adding the second card view layout first by clicking on the button to add it a couple times, it will add it along with the first card view layout. Also, when trying to remove the card views from the layout they are not removing correctly. Here is what I have in my java code...
MainActivity.Java
public class MainActivity extends AppCompatActivity {
ArrayList<RecyclerItem> addConverterCard = new ArrayList<>();
private RecyclerView recyclerView;
private RecyclerItemAdapter recyclerItemAdapter;
private RecyclerView.LayoutManager layoutManager;
public TextView ftocConverterLabelBtn, ftokConverterLabelBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recycler_item_view);
ftocConverterLabelBtn = findViewById(R.id.add_f_to_c_converter_label_btn);
ftokConverterLabelBtn = findViewById(R.id.add_f_to_k_converter_label_btn);
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
addConverterCard.add(new RecyclerItem());
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerItemAdapter = new RecyclerItemAdapter(addConverterCard);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerItemAdapter);
recyclerItemAdapter.notifyDataSetChanged();
closeActionButton();
}
}
});
ftokConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
addConverterCard.add(new RecyclerItem());
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerItemAdapter = new RecyclerItemAdapter(addConverterCard);
recyclerView.setLayoutManager(layoutManager);
recyclerItemAdapter.notifyDataSetChanged();
closeActionButton();
}
}
});
Adapter.Java
public static class RecyclerItemAdapter extends RecyclerView.Adapter<RecyclerItemAdapter.RecyclerViewHolder> {
public ArrayList<RecyclerItem> recyclerItemList;
public AdapterView.OnItemClickListener recyclerItemListener;
public List<String> converterType;
public interface OnItemClickListener {
void onItemClick (int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
recyclerItemListener = (AdapterView.OnItemClickListener) listener;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder(#NonNull View itemView, final OnItemClickListener listener) {
super(itemView);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert);
convertResult = itemView.findViewById(R.id.output_result_ftc);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn);
deleteCardBtn = itemView.findViewById(R.id.remove_card);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
}
}
});
}
}
public static class RecyclerViewHolder2 extends RecyclerViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder2(#NonNull View itemView, final OnItemClickListener listener2) {
super(itemView, listener2);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert2);
convertResult = itemView.findViewById(R.id.output_result_ftk);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn2);
deleteCardBtn = itemView.findViewById(R.id.remove_card2);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener2 != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener2.onItemClick(position);
}
}
}
});
}
}
#Override
public int getItemViewType(int position) {
return position % 2 * 2;
}
public RecyclerItemAdapter(ArrayList<RecyclerItem> rList) {
recyclerItemList = rList;
}
#NonNull
#Override
public RecyclerViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
switch (viewType) {
case 0:
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_celsius_converter_layout, parent, false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(v, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder;
case 2:
View v2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_kelvin_converter_layout, parent, false);
RecyclerViewHolder2 recyclerViewHolder2 = new RecyclerViewHolder2(v2, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder2;
}
return null;
}
#Override
public void onBindViewHolder(#NonNull RecyclerViewHolder holder, int position) {
switch (holder.getItemViewType()) {
case 0: RecyclerViewHolder viewHolder = (RecyclerViewHolder) holder;
RecyclerItem currentItem = recyclerItemList.get(position);
final String[] result = new String[1];
viewHolder.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {...}
viewHolder.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(viewHolder.getLayoutPosition());
}
});
break;
case 2: RecyclerViewHolder2 viewHolder2 = (RecyclerViewHolder2)holder;
RecyclerItem currentItem2 = recyclerItemList.get(position);
final String[] result2 = new String[1];
viewHolder2.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {...}
viewHolder2.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(viewHolder2.getLayoutPosition());
}
});
break;
}
}
#Override
public int getItemCount() {
return recyclerItemList.size();
}
public void removeCard(int position) {
recyclerItemList.remove(position);
notifyItemRemoved(position);
}
}
public class RecyclerItem {
public RecyclerItem() {
}
}
I appreciate your help!
Full Adapter Class
public static class RecyclerItemAdapter extends RecyclerView.Adapter<RecyclerItemAdapter.RecyclerViewHolder> {
public ArrayList<RecyclerItem> recyclerItemList;
public AdapterView.OnItemClickListener recyclerItemListener;
public List<String> converterType;
public interface OnItemClickListener {
void onItemClick (int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
recyclerItemListener = (AdapterView.OnItemClickListener) listener;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder(#NonNull View itemView, final OnItemClickListener listener) {
super(itemView);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert);
convertResult = itemView.findViewById(R.id.output_result_ftc);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn);
deleteCardBtn = itemView.findViewById(R.id.remove_card);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
}
}
});
}
}
public static class RecyclerViewHolder2 extends RecyclerViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder2(#NonNull View itemView, final OnItemClickListener listener2) {
super(itemView, listener2);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert2);
convertResult = itemView.findViewById(R.id.output_result_ftk);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn2);
deleteCardBtn = itemView.findViewById(R.id.remove_card2);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener2 != null) {
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener2.onItemClick(position);
}
}
}
});
}
}
#Override
public int getItemViewType(int position) {
return recyclerItemList.get(position).getType;
}
public RecyclerItemAdapter(ArrayList<RecyclerItem> rList) {
recyclerItemList = rList;
}
#NonNull
#Override
public RecyclerViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
switch (viewType) {
case 0:
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_celsius_converter_layout, parent, false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(v, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder;
case 1:
View v2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_kelvin_converter_layout, parent, false);
RecyclerViewHolder2 recyclerViewHolder2 = new RecyclerViewHolder2(v2, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder2;
}
return null;
}
#Override
public void onBindViewHolder(#NonNull RecyclerViewHolder holder, int position) {
switch (holder.getItemViewType()) {
case 0: RecyclerViewHolder viewHolder = (RecyclerViewHolder) holder;
RecyclerItem currentItem = recyclerItemList.get(position);
final String[] result = new String[1];
viewHolder.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {
#SuppressLint("SetTextI18n")
#Override
public void onClick(View view) {
String getIputFahValue = viewHolder.inputFahValueET.getText().toString();
NumberFormat nf = new DecimalFormat("0.000");
if (!getIputFahValue.isEmpty()) {
double d = Double.parseDouble(getIputFahValue);
double dd = d - 32;
double ddd = dd * 5;
double dddd = ddd / 9;
result[0] = Double.toString(dddd);
viewHolder.convertResult.setText(nf.format(dddd) + "°C");
viewHolder.convertResult.setVisibility(View.VISIBLE);
viewHolder.shortResult = nf.format(dddd) + "°C";
viewHolder.longResult = getIputFahValue + "°F is " + nf.format(dddd) + "°C";
if (result[0].contains(".0")) {
result[0] = result[0].replace(".0", "");
viewHolder.convertResult.setText(result[0] + "°C");
viewHolder.convertResult.setVisibility(View.VISIBLE);
viewHolder.shortResult = result[0] + "°C";
viewHolder.longResult = getIputFahValue + "°F is " + result[0] + "°C";
} else if (result[0].contains(".000")) {
result[0] = result[0].replace(".000", "");
viewHolder.convertResult.setText(result[0] + "°C");
viewHolder.convertResult.setVisibility(View.VISIBLE);
viewHolder.shortResult = result[0] + "°C";
viewHolder.longResult = getIputFahValue + "°F is " + result[0] + "°C";
}
} else {
Toast.makeText(view.getContext(), "Fahrenheit Value Field Cannot Be Blank!", Toast.LENGTH_LONG).show();
}
}
});
viewHolder.convertResult.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
AlertDialog.Builder adb = new AlertDialog.Builder(view.getContext());
adb.setIcon(R.drawable.ic_baseline_file_copy_32);
adb.setTitle("Copy Result");
adb.setMessage("You can copy the result to your clipboard if you would like. Choose if you want the short or long result copied to your clipboard.\n\nExample of Short and Long Result:\nShort Result: 32°C\nLong Result: 0°F is 32°C");
adb.setPositiveButton("Short", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.shortResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNegativeButton("Long", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.longResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
adb.create();
adb.show();
return false;
}
});
viewHolder.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(viewHolder.ge);
}
});
break;
case 2: RecyclerViewHolder2 viewHolder2 = (RecyclerViewHolder2)holder;
RecyclerItem currentItem2 = recyclerItemList.get(position);
final String[] result2 = new String[1];
viewHolder2.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {
#SuppressLint("SetTextI18n")
#Override
public void onClick(View view) {
String getIputFahValue = viewHolder2.inputFahValueET.getText().toString();
NumberFormat nf = new DecimalFormat("0.000");
if (!getIputFahValue.isEmpty()) {
double d = Double.parseDouble(getIputFahValue);
double dd = d - 32;
double ddd = dd * 5;
double dddd = ddd / 9;
double ddddd = dddd + 273.15;
result2[0] = Double.toString(ddddd);
viewHolder2.convertResult.setText(nf.format(ddddd) + "°K");
viewHolder2.convertResult.setVisibility(View.VISIBLE);
viewHolder2.shortResult = nf.format(dddd) + "°K";
viewHolder2.longResult = getIputFahValue + "°F is " + nf.format(dddd) + "°K";
if (result2[0].contains(".0")) {
result2[0] = result2[0].replace(".0", "");
viewHolder2.convertResult.setText(result2[0] + "°K");
viewHolder2.convertResult.setVisibility(View.VISIBLE);
viewHolder2.shortResult = result2[0] + "°K";
viewHolder2.longResult = getIputFahValue + "°F is " + result2[0] + "°K";
} else if (result2[0].contains(".000")) {
result2[0] = result2[0].replace(".000", "");
viewHolder2.convertResult.setText(result2[0] + "°K");
viewHolder2.convertResult.setVisibility(View.VISIBLE);
viewHolder2.shortResult = result2[0] + "°K";
viewHolder2.longResult = getIputFahValue + "°F is " + result2[0] + "°K";
}
} else {
Toast.makeText(view.getContext(), "Fahrenheit Value Field Cannot Be Blank!", Toast.LENGTH_LONG).show();
}
}
});
viewHolder2.convertResult.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
AlertDialog.Builder adb = new AlertDialog.Builder(view.getContext());
adb.setIcon(R.drawable.ic_baseline_file_copy_32);
adb.setTitle("Copy Result");
adb.setMessage("You can copy the result to your clipboard if you would like. Choose if you want the short or long result copied to your clipboard.\n\nExample of Short and Long Result:\nShort Result: 283.15°K\nLong Result: 50°F is 283.15°K");
adb.setPositiveButton("Short", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.shortResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNegativeButton("Long", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
ClipboardManager cbm = (ClipboardManager) view.getContext().getSystemService(CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("Copy", holder.longResult);
cbm.setPrimaryClip(clip);
Toast.makeText(view.getContext(), "Result Copied!", Toast.LENGTH_SHORT).show();
}
});
adb.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
adb.create();
adb.show();
return false;
}
});
viewHolder2.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(viewHolder2.getLayoutPosition());
}
});
break;
}
}
#Override
public int getItemCount() {
return recyclerItemList.size();
}
public void removeCard(int position) {
recyclerItemList.remove(position);
notifyItemRemoved(position);
}
}
public static class RecyclerItem {
public int getType;
int type;
public RecyclerItem(int mType) {
this.getType = mType;
}
public int getType() {
return type();
}
private int type() {
return type;
}
}
}

well there's some mistakes I suspect so I will try and suggest some things maybe it fixes your code behavior.
in removing the card, consider using holder.getAbsoluteAdapterPosition() instead of viewHolder.getLayoutPosition() or getAdapterPosition.
on adding any card, stop creating a new Adapter and LayoutManager over and over again, this components should be created once for any RecylcerView, just keep a reference to only the first old created adapter as a global variable, add the new card to the data ArrayList that the old adapter has reference to, use adapter.notifyDataSetChanged() on the old adapter reference that you're keeping as global variable.
I don't know how the viewType algorithm works, but if the options from add button decide which one you want, store an index to which card you want in the RecyclerItem object itself and in getItemViewType that you're overriding get the item at the required position and return its stored type rather than this strange position calculation (position%2*2).
by doing that make switch cases according to the integer values that you will be storing in ftoc/ftok/...etcConverterLabelBtn.setOnClickListener.
that would be a solution that it doesn't add or delete the right type of card in correspondence to your add/delete choices since your viewType algorithm will return value based on just the position not your choice.
anytime I used setHasFixedSize(true) it caused me trouble, so if you don't have a good reason to be using this, I suggest that you delete/comment its line of code completely
Update
your code should be looking like this :
Main Activity
public class MainActivity extends AppCompatActivity {
ArrayList<RecyclerItem> addConverterCard ;
private RecyclerView recyclerView;
private RecyclerItemAdapter recyclerItemAdapter;
private RecyclerView.LayoutManager layoutManager;
public TextView ftocConverterLabelBtn, ftokConverterLabelBtn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recycler_item_view);
ftocConverterLabelBtn = findViewById(R.id.add_f_to_c_converter_label_btn);
ftokConverterLabelBtn = findViewById(R.id.add_f_to_k_converter_label_btn);
addConverterCard = new ArrayList<>();
recyclerItemAdapter = new RecyclerItemAdapter(addConverterCard);
layoutManager = new LinearLayoutManager(MainActivity.this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerItemAdapter);
ftocConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
addConverterCard.add(new RecyclerItem(0));
recyclerItemAdapter.notifyDataSetChanged();
closeActionButton();
}
}
});
ftokConverterLabelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (clicked) {
addConverterCard.add(new RecyclerItem(1));
recyclerItemAdapter.notifyDataSetChanged();
closeActionButton();
}
}
});
Adapter code
public static class RecyclerItemAdapter extends RecyclerView.Adapter<RecyclerItemAdapter.RecyclerViewHolder> {
public ArrayList<RecyclerItem> recyclerItemList;
public AdapterView.OnItemClickListener recyclerItemListener;
public List<String> converterType;
public interface OnItemClickListener {
void onItemClick (int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
recyclerItemListener = (AdapterView.OnItemClickListener) listener;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder(#NonNull View itemView, final OnItemClickListener listener) {
super(itemView);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert);
convertResult = itemView.findViewById(R.id.output_result_ftc);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn);
deleteCardBtn = itemView.findViewById(R.id.remove_card);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null) {
int position = getAbsoluteAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
}
}
});
}
}
public static class RecyclerViewHolder2 extends RecyclerViewHolder {
EditText inputFahValueET;
TextView convertResult;
ImageView tempIconAndConvertBtn;
ImageView deleteCardBtn;
String shortResult, longResult;
public RecyclerViewHolder2(#NonNull View itemView, final OnItemClickListener listener2) {
super(itemView, listener2);
inputFahValueET = itemView.findViewById(R.id.input_fahrenheit_value_to_convert2);
convertResult = itemView.findViewById(R.id.output_result_ftk);
tempIconAndConvertBtn = itemView.findViewById(R.id.temp_icon_convert_btn2);
deleteCardBtn = itemView.findViewById(R.id.remove_card2);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener2 != null) {
int position = getAbsoluteAdapterPosition();
if (position != RecyclerView.NO_POSITION) {
listener2.onItemClick(position);
}
}
}
});
}
}
#Override
public int getItemViewType(int position) {
return recyclerItemList.get(position).getType();
}
public RecyclerItemAdapter(ArrayList<RecyclerItem> rList) {
recyclerItemList = rList;
}
#NonNull
#Override
public RecyclerViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
switch (viewType) {
case 0:
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_celsius_converter_layout, parent, false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(v, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder;
case 1:
View v2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.fahrenheit_to_kelvin_converter_layout, parent, false);
RecyclerViewHolder2 recyclerViewHolder2 = new RecyclerViewHolder2(v2, (OnItemClickListener) recyclerItemListener);
return recyclerViewHolder2;
}
return null;
}
#Override
public void onBindViewHolder(#NonNull RecyclerViewHolder holder, int position) {
switch (holder.getItemViewType()) {
case 0: RecyclerViewHolder viewHolder = (RecyclerViewHolder) holder;
RecyclerItem currentItem = recyclerItemList.get(position);
final String[] result = new String[1];
viewHolder.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {...});
viewHolder.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(holder.getAbsoluteAdapterPosition());
}
});
break;
case 1: RecyclerViewHolder2 viewHolder2 = (RecyclerViewHolder2)holder;
RecyclerItem currentItem2 = recyclerItemList.get(position);
final String[] result2 = new String[1];
viewHolder2.tempIconAndConvertBtn.setOnClickListener(new View.OnClickListener() {...});
viewHolder2.deleteCardBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
removeCard(holder.getAbsoluteAdapterPosition());
}
});
break;
}
}
#Override
public int getItemCount() {
return recyclerItemList.size();
}
public void removeCard(int position) {
recyclerItemList.remove(position);
notifyItemRemoved(position);
}
public class RecyclerItem {
int type ;
public RecyclerItem(int m_type) {
this.type = m_type ;
}
public int getType(){
return type;
}
}
}

Why I cannot pass data from RecyclerView to another RecyclerView - AndroidX

I want to make data from RecyclerView1 Activity1 can be passed to RecyclerView2 Activity2
//SectionAdapter.java
public class AdapterSectionHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;
public AdapterSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) {
this.mContext = mContext;
this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;
}
#Override
public SectionHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_section_hottrendingnews, null);
return new SectionHotTrendingNewsViewHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SectionHotTrendingNewsViewHolder sectionHotTrendingNewsViewHolder = (SectionHotTrendingNewsViewHolder) holder;
ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);
//Set
sectionHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
ArrayList singleSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
/*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() {
#Override
public void onRowHotLatestNewsClick(View view, int position) {
}
#Override
public void onIconHotLatestNewsClick(View view, int position) {
}
};*/
AdapterSingleHotTrendingNews itemListDataAdapter = new AdapterSingleHotTrendingNews(mContext, singleSectionItems);
/*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
//Allow ScrollView to intercept touch events once again.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
// Handle RecyclerView touch events.
v.onTouchEvent(event);
return true;
}
});*/
sectionHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
new View.OnClickListener() { #Override public void onClick(View v) {
Intent intent = new Intent(mContext, TabMoreHotActivity.class);
// here you create put extra in new intent not the intent that you created
intent.putExtra("MoreNews", modelSectionHotTrendingNews.get(position).getAllItemsInSection());
mContext.startActivity(intent);
} });
/*Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
//SetRecyclerView
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setHasFixedSize(true);
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setAdapter(itemListDataAdapter);
sectionHotTrendingNewsViewHolder.RecyclerViewSectionHotTrendingNews.setNestedScrollingEnabled(false);
}
#Override
public int getItemCount() {
int itemCount = modelSectionHotTrendingNews.size();
return itemCount;
}
public class SectionHotTrendingNewsViewHolder extends RecyclerView.ViewHolder {
protected TextView TVSectionTitle;
protected ImageView BTNHotTrendingNewsMore;
protected RecyclerView RecyclerViewSectionHotTrendingNews;
protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;
public SectionHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
RecyclerViewSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerView_Section_HotTrendingNews);
RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
}
}
}
//SingleAdapter.java
public class AdapterSingleHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;
public AdapterSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) {
this.mContext = mContext;
this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;
}
//Container
#Override
public SingleHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_single_hottrendingnews, null);
return new SingleHotTrendingNewsViewHolder(v);
}
//Fill Container with Model Setter Getter
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SingleHotTrendingNewsViewHolder singleHotTrendingNewsViewHolder = (SingleHotTrendingNewsViewHolder) holder;
final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);
//Set
singleHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
singleHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
singleHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();
final int id = modelSingleHotTrendingNewsX.getId();
if (booltrendingnewssaving == true){
Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
/*updateSavedNewsSaving("update_newssaving", id, false);*/
} else if(booltrendingnewssaving == false) {
Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
singleHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
/*updateSavedNewsSaving("update_newssaving", id, true);*/
}
}
});
/* Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
singleHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();
//Passing Data to GameDescriptionActivity
Intent intent = new Intent(mContext, GameDetailActivity.class);
intent.putExtra("ImagePKG", modelSingleHotTrendingNews.get(position).getGameimage());
intent.putExtra("NamePKG", modelSingleHotTrendingNews.get(position).getGamedate());
intent.putExtra("UrlPKG", modelSingleHotTrendingNews.get(position).getId());
intent.putExtra("DescriptionPKG", modelSingleHotTrendingNews.get(position).getGamedescription());
mContext.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
int itemCount = modelSingleHotTrendingNews.size();
return itemCount;
}
public class SingleHotTrendingNewsViewHolder extends RecyclerView.ViewHolder{
TextView TVGameDate;
TextView TVGameDescription;
ImageView IMGGameImage;
ImageView ICONHotTrendingNewsSaving;
private RelativeLayout ROWHotTrendingNewsContainer;
public SingleHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVGameDate = itemView.findViewById(R.id.TV_GameDate);
TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);
ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
}
}
}
//ModelSection.java
public class ModelSectionHotTrendingNews implements Serializable {
private String headerTitle;
private ArrayList<ModelSingleHotTrendingNews> allItemsInSection;
public ModelSectionHotTrendingNews() {
}
public String getHeaderTitle() {
return headerTitle;
}
public void setHeaderTitle(String headerTitle) {
this.headerTitle = headerTitle;
}
public ArrayList<ModelSingleHotTrendingNews> getAllItemsInSection() {
return allItemsInSection;
}
public void setAllItemsInSection(ArrayList<ModelSingleHotTrendingNews> allItemsInSection) {
this.allItemsInSection = allItemsInSection;
}
}
//ModelSingle.java
public class ModelSingleHotTrendingNews implements Serializable {
private int id;
private String gamedate;
private String gamedescription;
private int gameimage;
private Boolean trendingnewssaving;
private String value;
private String message;
public ModelSingleHotTrendingNews(int id, String gamedate, String gamedescription, int gameimage, Boolean trendingnewssaving, String value, String message) {
this.id = id;
this.gamedate = gamedate;
this.gamedescription = gamedescription;
this.gameimage = gameimage;
this.trendingnewssaving = trendingnewssaving;
this.value = value;
this.message = message;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getGamedate() {
return gamedate;
}
public void setGamedate(String gamedate) {
this.gamedate = gamedate;
}
public String getGamedescription() {
return gamedescription;
}
public void setGamedescription(String gamedescription) {
this.gamedescription = gamedescription;
}
public int getGameimage() {
return gameimage;
}
public void setGameimage(int gameimage) {
this.gameimage = gameimage;
}
public Boolean getTrendingnewssaving() {
return trendingnewssaving;
}
public void setTrendingnewssaving(Boolean trendingnewssaving) {
this.trendingnewssaving = trendingnewssaving;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
//AdapterMoreSection.java
public class AdapterMoreSectionHotTrendingNews extends RecyclerView.Adapter {
private Context mContext;
private ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews;
public AdapterMoreSectionHotTrendingNews(Context mContext, ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews) {
this.mContext = mContext;
this.modelSectionHotTrendingNews = modelSectionHotTrendingNews;
}
#Override
public SectionMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.itemmore_section_hottrendingnews, null);
return new SectionMoreHotTrendingNewsViewHolder(v);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SectionMoreHotTrendingNewsViewHolder sectionMoreHotTrendingNewsViewHolder = (SectionMoreHotTrendingNewsViewHolder) holder;
ModelSectionHotTrendingNews modelSectionHotTrendingNewsX = modelSectionHotTrendingNews.get(position);
//Set
sectionMoreHotTrendingNewsViewHolder.TVSectionTitle.setText(modelSectionHotTrendingNewsX.getHeaderTitle());
ArrayList singleMoreSectionItems = modelSectionHotTrendingNewsX.getAllItemsInSection();
/*AdapterSingleHotLatestNews.RecyclerViewClickListener listenerLatestNews;
listenerLatestNews = new AdapterSingleHotLatestNews.RecyclerViewClickListener() {
#Override
public void onRowHotLatestNewsClick(View view, int position) {
}
#Override
public void onIconHotLatestNewsClick(View view, int position) {
}
};*/
AdapterMoreSingleHotTrendingNews itemListDataAdapter = new AdapterMoreSingleHotTrendingNews(mContext, singleMoreSectionItems);
/*itemRowHolder.recycler_view_list.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
// Disallow ScrollView to intercept touch events.
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
//Allow ScrollView to intercept touch events once again.
v.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
// Handle RecyclerView touch events.
v.onTouchEvent(event);
return true;
}
});*/
final String sectionTitle = modelSectionHotTrendingNewsX.getHeaderTitle();
sectionMoreHotTrendingNewsViewHolder.BTNHotTrendingNewsMore.setOnClickListener(
new View.OnClickListener() {
#Override public void onClick(View v) {
//More IN RecyclerViewMore
}
});
/*Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
//SetRecyclerView
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setHasFixedSize(true);
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setAdapter(itemListDataAdapter);
sectionMoreHotTrendingNewsViewHolder.RecyclerViewMoreSectionHotTrendingNews.setNestedScrollingEnabled(false);
}
#Override
public int getItemCount() {
int itemCount = modelSectionHotTrendingNews.size();
return itemCount;
}
public class SectionMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder {
protected TextView TVSectionTitle;
protected ImageView BTNHotTrendingNewsMore;
protected RecyclerView RecyclerViewMoreSectionHotTrendingNews;
public SectionMoreHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVSectionTitle = (TextView) itemView.findViewById(R.id.TV_SectionTitle);
BTNHotTrendingNewsMore= (ImageView) itemView.findViewById(R.id.BTN_HotTrendingNewsMore);
RecyclerViewMoreSectionHotTrendingNews = (RecyclerView) itemView.findViewById(R.id.RecyclerViewMore_Section_HotTrendingNews);
}
}
}
//AdapterMoreSingle.java
public class AdapterMoreSingleHotTrendingNews extends RecyclerView.Adapter{
private Context mContext;
private ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews;
public AdapterMoreSingleHotTrendingNews(Context mContext, ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews) {
this.mContext = mContext;
this.modelSingleHotTrendingNews = modelSingleHotTrendingNews;
}
//Container
#Override
public SingleMoreHotTrendingNewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.itemmore_single_hottrendingnews, null);
return new SingleMoreHotTrendingNewsViewHolder(v);
}
//Fill Container with Model Setter Getter
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final SingleMoreHotTrendingNewsViewHolder singleMoreHotTrendingNewsViewHolder = (SingleMoreHotTrendingNewsViewHolder) holder;
final ModelSingleHotTrendingNews modelSingleHotTrendingNewsX = modelSingleHotTrendingNews.get(position);
//Set
singleMoreHotTrendingNewsViewHolder.TVGameDate.setText(modelSingleHotTrendingNewsX.getGamedate());
singleMoreHotTrendingNewsViewHolder.TVGameDescription.setText(modelSingleHotTrendingNewsX.getGamedescription());
singleMoreHotTrendingNewsViewHolder.IMGGameImage.setImageResource(modelSingleHotTrendingNewsX.getGameimage());
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final Boolean booltrendingnewssaving = modelSingleHotTrendingNewsX.getTrendingnewssaving();
final int id = modelSingleHotTrendingNewsX.getId();
if (booltrendingnewssaving == true){
Toast.makeText(v.getContext(), "Turn Off Saved News " + id, Toast.LENGTH_SHORT).show();
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_off);
modelSingleHotTrendingNewsX.setTrendingnewssaving(false);
/*updateSavedNewsSaving("update_newssaving", id, false);*/
} else if(booltrendingnewssaving == false) {
Toast.makeText(v.getContext(), "Turn On Saved News " + id, Toast.LENGTH_SHORT).show();
singleMoreHotTrendingNewsViewHolder.ICONHotTrendingNewsSaving.setImageResource(R.drawable.saved_on);
modelSingleHotTrendingNewsX.setTrendingnewssaving(true);
/*updateSavedNewsSaving("update_newssaving", id, true);*/
}
}
});
/* Glide.with(mContext)
.load(feedItem.getImageURL())
.diskCacheStrategy(DiskCacheStrategy.ALL)
.centerCrop()
.error(R.drawable.bg)
.into(feedListRowHolder.thumbView);*/
singleMoreHotTrendingNewsViewHolder.ROWHotTrendingNewsContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(v.getContext(), modelSingleHotTrendingNews.get(position).getGamedescription(), Toast.LENGTH_SHORT).show();
//Passing Data to GameDescriptionActivity
Intent intent = new Intent(mContext, GameDetailActivity.class);
intent.putExtra("ImagePKG", modelSingleHotTrendingNews.get(position).getGameimage());
intent.putExtra("NamePKG", modelSingleHotTrendingNews.get(position).getGamedate());
intent.putExtra("UrlPKG", modelSingleHotTrendingNews.get(position).getId());
intent.putExtra("DescriptionPKG", modelSingleHotTrendingNews.get(position).getGamedescription());
mContext.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
int itemCount = modelSingleHotTrendingNews.size();
return itemCount;
}
public class SingleMoreHotTrendingNewsViewHolder extends RecyclerView.ViewHolder{
TextView TVGameDate;
TextView TVGameDescription;
ImageView IMGGameImage;
ImageView ICONHotTrendingNewsSaving;
private RelativeLayout ROWHotTrendingNewsContainer;
public SingleMoreHotTrendingNewsViewHolder(View itemView) {
super(itemView);
TVGameDate = itemView.findViewById(R.id.TV_GameDate);
TVGameDescription = itemView.findViewById(R.id.TV_GameDescription);
IMGGameImage = itemView.findViewById(R.id.IMG_GameImage);
ICONHotTrendingNewsSaving = itemView.findViewById(R.id.ICON_HotTrendingNewsSaving);
ROWHotTrendingNewsContainer = itemView.findViewById(R.id.ROW_HotTrendingNewsContainer);
}
}
}
//Activity2More.java
public class TabMoreHotActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragmentmore_tabhot);
AdapterMoreSectionHotTrendingNews adapterMoreSectionHotTrendingNews;
ArrayList<ModelSectionHotTrendingNews> modelSectionHotTrendingNews = new ArrayList<>();
Bundle bundle = getIntent().getExtras();
if(bundle!=null)
{
modelSectionHotTrendingNews = (ArrayList<ModelSectionHotTrendingNews>) bundle.getSerializable("MoreNews");
}
//1
RecyclerView RecyclerViewMoreSingleHotTrendingNews = findViewById(R.id.RecyclerViewMore_Single_HotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
adapterMoreSectionHotTrendingNews = new AdapterMoreSectionHotTrendingNews(this, modelSectionHotTrendingNews);
RecyclerViewMoreSingleHotTrendingNews.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
RecyclerViewMoreSingleHotTrendingNews.setAdapter(adapterMoreSectionHotTrendingNews);
//Optimized
RecyclerViewMoreSingleHotTrendingNews.setHasFixedSize(true);
RecyclerViewMoreSingleHotTrendingNews.setItemViewCacheSize(20);
}
}
//Error
Process: com.indofun.android.indojoy, PID: 18827
java.lang.ClassCastException: com.indofun.android.indojoy.Models.Model_HotTrendingNews.ModelSingleHotTrendingNews cannot be cast to com.indofun.android.indojoy.Models.Model_HotTrendingNews.ModelSectionHotTrendingNews
at com.indofun.android.indojoy.Adapters.AdapterMore_HotTrendingNews.AdapterMoreSectionHotTrendingNews.onBindViewHolder(AdapterMoreSectionHotTrendingNews.java:39)
//NOTE
//RecyclerView1 using AdapterSection.java,AdapterSingle.java,ModelSection.java,ModelSingle.java
//RecyclerView2 using AdapterMoreSection.java,AdapterMoreSingle.java,ModelSection.java,ModelSingle.java

Inside TabMoreHotActivity use like this:
ArrayList<ModelSingleHotTrendingNews> modelSingleHotTrendingNews = new ArrayList<>();
Bundle bundle = getIntent().getExtras();
if(bundle!=null {
modelSingleHotTrendingNews = ArrayList<ModelSingleHotTrendingNews>) bundle.getSerializable("MoreNews");
}

ExpandableRecyclerView - How to expand and collapse multiple CardViews simultaneously

Is it possible to expand and collapse multiple CardViews within a RecyclerView at the same time? I created a header (for my RecyclerView) with two buttons but I'm not sure what needs to go in the click event.
RecyclerView adapter class
public class MyRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEM = 1;
public boolean isSupposedToBeCollapsed;
private Context mContext;
RecyclerViewHeader header;
List<RecyclerViewItem> listItems;
ValueAnimator mAnimator;
public MyRecyclerAdapter(Context context, RecyclerViewHeader header, List<RecyclerViewItem> listItems)
{
this.mContext = context;
this.header = header;
this.listItems = listItems;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == TYPE_HEADER)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_header, parent, false);
return new MyRecyclerAdapter.VHHeader(v);
}
else if(viewType == TYPE_ITEM)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item, parent, false);
return new MyRecyclerAdapter.VHItem(v);
}
throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}
private RecyclerViewItem getItem(int position)
{
return listItems.get(position);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final Typeface iconFont = FontManager.getTypeface(mContext, FontManager.FONTAWESOME);
if (holder instanceof VHHeader)
{
final VHHeader vhHeader = (VHHeader)holder;
vhHeader.btnExpandAll.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(isSupposedToBeCollapsed){
// change visibility to 'VISIBLE'
txtB.setVisibility(View.VISIBLE);
// change direction of chevron to 'up'
txtExpandCollapse.setText(R.string.fa_icon_chevron_up);
// apply animation to the height of 'txtB'
mAnimator = slideAnimator(0, textBHeight);
// start the animation
mAnimator.start();
}
else{
}
}
});
vhHeader.btnCollapseAll.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(isSupposedToBeCollapsed){
// change visibility to 'VISIBLE'
txtB.setVisibility(View.VISIBLE);
// change direction of chevron to 'up'
txtExpandCollapse.setText(R.string.fa_icon_chevron_up);
// apply animation to the height of 'txtB'
mAnimator = slideAnimator(0, textBHeight);
// start the animation
mAnimator.start();
}
else{
}
}
});
}
else if (holder instanceof VHItem)
{
RecyclerViewItem currentItem = getItem(position-1);
final VHItem vhItem = (VHItem)holder;
vhItem.txtA.setText(currentItem.getTitle());
vhItem.txtB.setText(currentItem.getDescription());
vhItem.txtB.setVisibility(View.GONE);
vhItem.txtExpandCollapse.setText(R.string.fa_icon_chevron_down);
vhItem.txtExpandCollapse.setTypeface(iconFont);
//Add onPreDrawListener
vhItem.txtB.getViewTreeObserver().addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
vhItem.txtB.getViewTreeObserver().removeOnPreDrawListener(this);
vhItem.txtB.setVisibility(View.GONE);
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
vhItem.txtB.measure(widthSpec, heightSpec);
vhItem.textBHeight = vhItem.txtB.getMeasuredHeight();
return true;
}
});
vhItem.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(vhItem.txtB.getVisibility() == View.GONE){
vhItem.expand();
} else {
vhItem.collapse();
}
}
});
vhItem.mLinearLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(vhItem.txtB.getVisibility() == View.GONE){
vhItem.expand();
} else {
vhItem.collapse();
}
}
});
vhItem.txtExpandCollapse.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(vhItem.txtB.getVisibility() == View.GONE){
vhItem.expand();
} else {
vhItem.collapse();
}
}
});
}
}
// need to override this method
#Override
public int getItemViewType(int position) {
if(isPositionHeader(position))
return TYPE_HEADER;
return TYPE_ITEM;
}
private boolean isPositionHeader(int position)
{
return position == 0;
}
// increasing getItemcount to 1. This will be the row of header.
#Override
public int getItemCount() {
return listItems.size()+1;
}
class VHHeader extends RecyclerView.ViewHolder{
Button btnCollapseAll, btnExpandAll;
public VHHeader(View headerView) {
super(headerView);
this.btnCollapseAll = headerView.findViewById(R.id.btn_collapseall);
this.btnExpandAll = headerView.findViewById(R.id.btn_expandall);
}
}
public class VHItem extends RecyclerView.ViewHolder{
CardView cardView;
LinearLayout mLinearLayout;
RecyclerView mRecyclerView;
RelativeLayout mRelativeLayout;
TextView txtExpandCollapse, txtA, txtB;
public int textBHeight;
public VHItem(View itemView) {
super(itemView);
this.cardView = itemView.findViewById(R.id.cv);
this.mLinearLayout = itemView.findViewById(R.id.cardview_tconnections_titlerow);
this.mRelativeLayout = itemView.findViewById(R.id.my_relativelayout);
this.mRecyclerView = itemView.findViewById(R.id.my_recyclerview);
this.txtExpandCollapse = itemView.findViewById(R.id.tv_expandcollapse);
this.txtA = itemView.findViewById(R.id.tv_A);
this.txtB = itemView.findViewById(R.id.tv_B);
}
private void expand() {
// change visibility to 'VISIBLE'
txtB.setVisibility(View.VISIBLE);
// change direction of chevron to 'up'
txtExpandCollapse.setText(R.string.fa_icon_chevron_up);
// apply animation to the height of 'txtB'
mAnimator = slideAnimator(0, textBHeight);
// start the animation
mAnimator.start();
}
private void collapse() {
// change direction of chevron to 'down'
txtExpandCollapse.setText(R.string.fa_icon_chevron_down);
int finalHeight = txtB.getHeight();
ValueAnimator mAnimator = slideAnimator(finalHeight, 0);
mAnimator.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationEnd(Animator animator) {
txtB.setVisibility(View.GONE);
}
#Override
public void onAnimationStart(Animator animator) {
}
#Override
public void onAnimationCancel(Animator animator) {
}
#Override
public void onAnimationRepeat(Animator animator) {
}
});
mAnimator.start();
}
public ValueAnimator slideAnimator(int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
// update height
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = txtB.getLayoutParams();
layoutParams.height = value;
txtB.setLayoutParams(layoutParams);
}
});
return animator;
}
}
}
Fragment class
public class MyFragment extends android.support.v4.app.Fragment {
private MyRecyclerAdapter adapter;
public MyFragment() {}
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_rv, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
View v = getView();
assert v != null;
recyclerView = v.findViewById(R.id.my_recyclerview);
linearLayoutManager = new LinearLayoutManager(getActivity());
MyRecyclerAdapter adapter = new MyRecyclerAdapter(getContext(), getHeader(), getListItems());
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setAdapter(adapter);
super.onActivityCreated(savedInstanceState);
}
RecyclerView recyclerView;
LinearLayoutManager linearLayoutManager;
public RecyclerViewHeader getHeader()
{
return new RecyclerViewHeader();
}
public List<RecyclerViewItem> getListItems()
{
List<RecyclerViewItem> rvItems = new ArrayList<>();
RecyclerViewItem itemA = new RecyclerViewItem();
itemA.setConnectionMode("Item A");
itemA.setConnectionName("Feature A1");
rvItems.add(itemA);
RecyclerViewItem itemB = new RecyclerViewItem();
itemB.setConnectionMode("Item B");
itemB.setConnectionName("Feature B1\nFeature B2");
rvItems.add(itemB);
RecyclerViewItem itemC = new RecyclerViewItem();
itemC.setConnectionMode("Item C");
itemC.setConnectionName("Feature C1\nFeature C2\nFeature C3");
rvItems.add(itemC);
return rvItems;
}
}

What you can do is, set a variable(boolean) that stores the state of the card (expanded/collapsed) in the RecyclerAdapter code.
Then, in your onBindViewHolder code block, write a piece of code to check if the card should be expanded or collapsed using the above-mentioned variable and the required display code.
Example:
if(isSuppossedToBeCollapsed){
textView.setVisibility = false;
}
else{
textView.setVisibility = true;
}
You can then call notifyDatasetChanged in your RecyclerAdapter code to update the recycler views when you click the button which will redraw the views and reflect the state of the cards(expanded/collapsed) accordingly.
NotifyDatasetChanged Documentation

wrong recyclerview item position

my recyclerview is great in scrolling but when it contains more than two items and click on last item or the one before it gives me the wrong position this is
and throws a NullPointerException this is my whole code from adapter to the listener.
my code :
public class ListAdapter extends RecyclerView.Adapter<ViewHolder> {
private List<ItemView> items;
private Context context;
public ListAdapter(List<ItemView> items, Context context) {
this.items = items;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_style, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
ItemView i = items.get(position);
ViewHolder.setHeadText(i.getHead());
ViewHolder.setScoreText(i.getContent());
}
#Override
public int getItemCount() {
return items.size();
}
}
class ViewHolder extends RecyclerView.ViewHolder {
private RecyclerViewOnTouchItemListener.ClickListener clickListener;
private static TextView headText, urlText;
private ConstraintLayout itemLayout;
public ViewHolder(View itemView) {
super(itemView);
headText = (TextView) itemView.findViewById(R.id.list_item_header);
urlText = (TextView) itemView.findViewById(R.id.list_item_content);
itemLayout = (ConstraintLayout) itemView.findViewById(R.id.item_list);
// itemLayout.setOnClickListener(this);
}
public static void setHeadText(String headText) {
ViewHolder.headText.setText(headText);
}
public static void setScoreText(String scoreText) {
ViewHolder.urlText.setText(scoreText);
}
public static String getHeadText(){return headText.getText().toString();}
public static String getUrlText(){return urlText.getText().toString();}
}
class RecyclerViewOnTouchItemListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerViewOnTouchItemListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildAdapterPosition(child));
}
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildAdapterPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) { }
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) { }
interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
}
and this is the activity that holds the recyclerview :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_url_list);
context = getApplicationContext();
database = new DatabaseHelper(context);
listOfUrl = (RecyclerView) findViewById(R.id.url_list);
find = (Button) findViewById(R.id.findBtn);
cancel = (Button) findViewById(R.id.cancelBtn);
makeItPopUp();
listOfUrl.setLayoutManager(new LinearLayoutManager(this));
listOfUrl.setHasFixedSize(true);
listOfUrl.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
adapter = new ListAdapter(fillList(), context);
listOfUrl.setAdapter(adapter);
adapter.notifyDataSetChanged();
selectedItems = new ArrayList<Boolean>(Arrays.asList(new Boolean[listOfUrl.getAdapter().getItemCount()]));
Collections.fill(selectedItems, Boolean.FALSE);
listOfUrl.addOnItemTouchListener(
new RecyclerViewOnTouchItemListener(this, listOfUrl
, new RecyclerViewOnTouchItemListener.ClickListener() {
#Override
public void onClick(View view, int position) {
if (selectedItems.get(position))
setItemSelectedState(false, position, Color.WHITE);
else
setItemSelectedState(true, position, Color.LTGRAY);
}
#Override
public void onLongClick(View view, int position) {}
private void setItemSelectedState(boolean isSelected, int position, int color) {
try {
listOfUrl.getChildAt(position).setBackgroundColor(color);
selectedItems.add(position, isSelected);
} catch (NullPointerException e) {
e.printStackTrace();
}
}
})
);
find.setOnClickListener(this);
cancel.setOnClickListener(this); }
any on can tell me what i did wrong.

Simple solution, create interface class:
public interface ListListener {
void onClick(int pos);
void onLongClick(int pos);
}
Adjust the content of your RecyclerViewAdapter class:
public class ListAdapter extends RecyclerView.Adapter<ViewHolder> {
private ListListener listener;
private List<ItemView> items;
private Context context;
public ListAdapter(List<ItemView> items, Context context) {
this.items = items;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_style, parent, false);
return new ViewHolder(view);
}
public ItemView getItem(int pos) {
return items.get(pos);
}
public void setListener(ListListener listener) {
this.listener = listener;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
ItemView i = items.get(position);
holder.setHeadText(i.getHead());
holder.setScoreText(i.getContent());
holder.itemLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int pos = holder.getAdapterPosition();
if (listener != null && pos != RecyclerView.NO_POSITION) {
listener.onClick(pos);
}
}
});
holder.itemLayout.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
int pos = holder.getAdapterPosition();
if (pos != -1) {
if (listener != null) {
listener.onLongClick(getItem(pos));
}
}
return true;
}
});
}
And in your Activity class I edited some parts:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_url_list);
context = getApplicationContext();
database = new DatabaseHelper(context);
listOfUrl = (RecyclerView) findViewById(R.id.url_list);
find = (Button) findViewById(R.id.findBtn);
cancel = (Button) findViewById(R.id.cancelBtn);
makeItPopUp();
listOfUrl.setLayoutManager(new LinearLayoutManager(this));
listOfUrl.setHasFixedSize(true);
listOfUrl.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
adapter = new ListAdapter(fillList(), context);
adapter.setListener(new SelectCountryDialogListener() {
#Override
public void onClick(int pos) {
ItemView item = adapter.getItem(pos);
}
#Override
public void onLongClick(int pos) {
ItemView item = adapter.getItem(pos);
}
});
listOfUrl.setAdapter(adapter);
selectedItems = new ArrayList<Boolean>(Arrays.asList(new Boolean[listOfUrl.getAdapter().getItemCount()]));
Collections.fill(selectedItems, Boolean.FALSE);
find.setOnClickListener(this);
cancel.setOnClickListener(this);
}
I'm pretty sure, that now it is very easy for you. Just to implement the functionality in onClick and onLongClick methods.

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