Adding Items in RecycleView Dynamically using a button

Question

I have a button(save contact) to save contacts ,the button when pressed get name and email from edit text and should dynamically add 1 list item in recycle view

The

Answer 1

layout

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/rvContactNumber"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:nestedScrollingEnabled="false"
    android:overScrollMode="never"
    tools:itemCount="2"
    tools:listitem="@layout/row_add_contact_number" />

java

private ArrayList<ContactNumberModel> arrayList;
private ContactNumberAdapter adapter;

onCreate

arrayList = new ArrayList<>();
arrayList.add(new ContactNumberModel());
adapter = new ContactNumberAdapter(context);

binding.rvContactNumber.setLayoutManager(new LinearLayoutManager(context));
binding.rvContactNumber.setHasFixedSize(true);
binding.rvContactNumber.setAdapter(adapter);

ContactNumberModel.java

public class ContactNumberModel {
    private String contactNo;

    public String getContactNo() {
        return contactNo;
    }

    public void setContactNo(String contactNo) {
        this.contactNo = contactNo;
    }
}

ContactNumberAdapter.java

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

    private Context context;
    private ArrayList<ContactNumberModel> arrayList;

    public ContactNumberAdapter(Context context) {
        this.context = context;
        this.arrayList = new ArrayList<>();
        this.arrayList.add(new ContactNumberModel());
    }

    @NonNull
    @Override
    public ContactNumberAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        RowAddContactNumberBinding binding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.row_add_contact_number, parent, false);
        return new ViewHolder(binding);
    }

    @Override
    public void onBindViewHolder(@NonNull final ContactNumberAdapter.ViewHolder holder, int position) {
        ContactNumberModel model = arrayList.get(position);
        //holder.bind(model);
        holder.binding.etContactNumber.setText("");

        holder.binding.etContactNumber.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                arrayList.get(holder.getAdapterPosition()).setContactNo(editable.toString());
            }
        });

        if (arrayList.size() - 1 == holder.getAdapterPosition()) {
            holder.binding.tvAddMore.setVisibility(View.VISIBLE);
            holder.binding.ivRemove.setVisibility(View.GONE);
        } else {
            holder.binding.tvAddMore.setVisibility(View.GONE);
            holder.binding.ivRemove.setVisibility(View.VISIBLE);
        }

        holder.binding.ivRemove.setOnClickListener(null);
        holder.binding.tvAddMore.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                addNewRow();
            }
        });
    }

    public void addNewRow() {
        this.arrayList.add(new ContactNumberModel());
        notifyDataSetChanged();
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        RowAddContactNumberBinding binding;

        public ViewHolder(RowAddContactNumberBinding binding) {
            super(binding.getRoot());
            this.binding = binding;
        }

        public void bind(ContactNumberModel model) {
            binding.setContact(model);
            binding.executePendingBindings();
        }
    }
}

row_add_contact_number.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

        <variable
            name="contact"
            type="com.appname.model.ContactNumberModel" />
    </data>

    <androidx.appcompat.widget.LinearLayoutCompat
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/_10sdp"
        android:orientation="vertical">

        <androidx.appcompat.widget.LinearLayoutCompat
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/_15sdp"
            android:layout_marginRight="@dimen/_15sdp"
            android:gravity="center"
            android:orientation="horizontal">

            <com.google.android.material.textfield.TextInputLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:theme="@style/TextInputLayoutHint">

                <androidx.appcompat.widget.AppCompatEditText
                    android:id="@+id/etContactNumber"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:clickable="false"
                    android:focusableInTouchMode="true"
                    android:hint="Enter Contact Number"
                    android:inputType="number"
                    android:maxLines="1" />

            </com.google.android.material.textfield.TextInputLayout>

            <androidx.appcompat.widget.AppCompatTextView
                android:id="@+id/tvAddMore"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/_3sdp"
                android:layout_marginLeft="@dimen/_3sdp"
                android:fontFamily="@font/font_barlow"
                android:gravity="center"
                android:text="@string/add_more"
                android:textColor="@color/colorOrange"
                android:textSize="@dimen/_12ssp"
                android:textStyle="bold" />

            <androidx.appcompat.widget.AppCompatImageView
                android:id="@+id/ivRemove"
                android:layout_width="@dimen/_15sdp"
                android:layout_height="@dimen/_15sdp"
                android:layout_marginLeft="@dimen/_5sdp"
                android:adjustViewBounds="true"
                android:src="@drawable/ic_logo"
                android:visibility="gone" />

        </androidx.appcompat.widget.LinearLayoutCompat>

        <View style="@style/Divider" />

    </androidx.appcompat.widget.LinearLayoutCompat>

</layout>

Answer 2

You don't need to go through the entire life cycle of your Activity or Fragment just because you've made changes to the list. Instead try adding the item in the list you currently have associated with the Adapter. And then call adapter.notifyDataSetChange(). This should automatically add the new Item to the RecyclerView.

Answer 3

Add this method to your adapter and call on button click.

public void newAddeddata(String company_name){
        NewleadsPOJO newValue=new NewleadsPOJO();
        newValue.setLeads_company(company_name);
        datalist.add(newValue);
        notifyDataSetChanged();
    }

Add following method to NewLeadFrag

public NewleadsAdapter getAdapter(){
   return adapter;
}

now in Createmeetingfrag

leads.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                NewLeadFrag fragment = getFragmentManager().findFragmentByTag("NewLeadFrag_TAG"); //set tag of fragment when you add with fragment manager. and if you are using support library use getSupportFragmentManager()
               if(fragment!= null){
                    fragment.getAdapter().newAddeddata(company_name.getText().toString());
                }

            }
        });