How to make a fragment with Animation and communicate with activity in Android

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.application.fragmentexampleapp.MainActivity">

    <EditText
        android:id="@+id/edittext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:stateListAnimator="@null"
        android:text="send" />

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

package com.example.application.fragmentexampleapp;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;


/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link BlankFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link BlankFragment#newInstance} factory method to
 * create an instance of this fragment.
 */
public class BlankFragment extends Fragment {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String TEXT = "text";

    // TODO: Rename and change types of parameters
    private String mText;

    private OnFragmentInteractionListener mListener;

    private EditText editTextFragment;
    private Button buttonFragment;

    public BlankFragment() {
        // Required empty public constructor
    }

    // TODO: Rename and change types and number of parameters
    public static BlankFragment newInstance(String text) {
        BlankFragment fragment = new BlankFragment();
        Bundle args = new Bundle();
        args.putString(TEXT, text);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mText = getArguments().getString(TEXT);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_blank, container, false);

        buttonFragment = view.findViewById(R.id.button_fragment);
        editTextFragment = view.findViewById(R.id.edittext_fragment);
        editTextFragment.setText(mText);
        editTextFragment.requestFocus();

        buttonFragment.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String sendBackText = editTextFragment.getText().toString();
                sendBack(sendBackText);
            }
        });

        return view;
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void sendBack(String sendBackText) {
        if (mListener != null) {
            mListener.onFragmentInteraction(sendBackText);
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        void onFragmentInteraction(String sendBackText);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <translate
        android:fromXDelta="100%" android:toXDelta="0%"
        android:fromYDelta="0%" android:toYDelta="0%"
        android:duration="200" />
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <translate
        android:fromXDelta="0%" android:toXDelta="100%"
        android:fromYDelta="0%" android:toYDelta="0%"
        android:duration="200" />
</set>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/holo_green_light"
    android:clickable="true"
    tools:context="com.example.application.fragmentexampleapp.BlankFragment">

    <EditText
        android:id="@+id/edittext_fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        android:textColor="@android:color/white" />

    <Button
        android:id="@+id/button_fragment"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="send back" />

</RelativeLayout>

package com.example.application.fragmentexampleapp;

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;

public class MainActivity extends AppCompatActivity implements BlankFragment.OnFragmentInteractionListener {
    private FrameLayout fragmentContainer;
    private EditText editText;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fragmentContainer = (FrameLayout) findViewById(R.id.fragment_container);
        editText = (EditText) findViewById(R.id.edittext);
        button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String text = editText.getText().toString();
                openFragment(text);
            }
        });
    }

    public void openFragment(String text) {
        BlankFragment fragment = BlankFragment.newInstance(text);
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_right, R.anim.enter_from_right, R.anim.exit_to_right);
        transaction.addToBackStack(null);
        transaction.add(R.id.fragment_container, fragment, "BLANK_FRAGMENT").commit();
    }

    @Override
    public void onFragmentInteraction(String sendBackText) {
        editText.setText(sendBackText);
        onBackPressed();
    }
}