<FrameLayout  xmlns:android="http://schemas.android.com/apk/res/android"

   xmlns:tools="http://schemas.android.com/tools"

   xmlns:app="http://schemas.android.com/apk/res-auto"

       android:id="@+id/FragmentContainer"

   android:layout_width="match_parent"

   android:layout_height="match_parent"

   app:layout_behavior="@string/appbar_scrolling_view_behavior"

   tools:layout="@layout/fragment_main"

   />

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

   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:paddingLeft="@dimen/activity_horizontal_margin"

   android:paddingRight="@dimen/activity_horizontal_margin"

   android:paddingTop="@dimen/activity_vertical_margin"

   android:paddingBottom="@dimen/activity_vertical_margin"

   tools:context=".MainActivity"

   android:orientation="horizontal">

   <TextView android:text="Name:"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content" />

   <EditText

       android:id="@+id/edit_message"

       android:layout_width="0dp"

       android:layout_weight="1"

       android:layout_height="wrap_content"

       android:hint="Type name here..." />

   <Button

       android:id="@+id/send_message"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:text="Send"

       />

</LinearLayout>

package com.notarazi.myfragments2;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

/**

* A placeholder fragment containing a simple view.

*/

public class MainActivityFragment extends Fragment {

   public MainActivityFragment() {

   }

   @Override

   public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setHasOptionsMenu(true);

   }

   @Override

   public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {

       inflater.inflate(R.menu.menu_fragment, menu);

   }

   @Override

   public boolean onOptionsItemSelected(MenuItem item) {

       int id = item.getItemId();

       if(id == R.id.action_send){

           //Do whatever you want to do

           EditText editText = (EditText) getActivity().findViewById(R.id.edit_message);

           Toast.makeText(getActivity().getApplicationContext(), "You have entered, \n" + editText.getText().toString(), Toast.LENGTH_LONG).show();

           return true;

       }

       return super.onOptionsItemSelected(item);

   }

   @Override

   public View onCreateView(LayoutInflater inflater, ViewGroup container,

                            Bundle savedInstanceState) {

       return inflater.inflate(R.layout.fragment_main, container, false);

   }

   @Override

   public void onActivityCreated(Bundle savedInstanceState)

   {

       // TODO Auto-generated method stub

       super.onActivityCreated(savedInstanceState);

       Button sendButton = (Button) getActivity().findViewById(R.id.send_message);

       sendButton.setOnClickListener(new View.OnClickListener() {

           @Override

           public void onClick(View v) {

               sendMessage(v);

           }

       });

   }

   public void sendMessage(View view) {

       EditText editText = (EditText) getActivity().findViewById(R.id.edit_message);

       Toast.makeText(getActivity().getApplicationContext(), "You have entered, \n" + editText.getText().toString(), Toast.LENGTH_LONG).show();

   }

}

<menu 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" tools:context=".MainActivity">

   <item

       android:id="@+id/action_send"

       android:title="fragment action"

       android:icon="@android:drawable/ic_menu_send"

       android:orderInCategory="10"

       app:showAsAction="always" />

</menu>

package com.notarazi.myfragments2;

import android.os.Bundle;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.Snackbar;

import android.support.v4.app.Fragment;

import android.support.v4.app.FragmentManager;

import android.support.v4.app.FragmentTransaction;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

public class MainActivity extends AppCompatActivity {

   @Override

   protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.activity_main);

       setFragment(new MainActivityFragment());

       Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

       setSupportActionBar(toolbar);

       FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

       fab.setOnClickListener(new View.OnClickListener() {

           @Override

           public void onClick(View view) {

               Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

                       .setAction("Action", null).show();

           }

       });

   }

   // This could be moved into an abstract BaseActivity

   // class for being re-used by several instances

   protected void setFragment(Fragment fragment) {

       FragmentManager fragmentManager = getSupportFragmentManager();

       FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

       fragmentTransaction.replace(R.id.FragmentContainer, fragment);

       fragmentTransaction.commit();

   }

   @Override

   public boolean onCreateOptionsMenu(Menu menu) {

       // Inflate the menu; this adds items to the action bar if it is present.

       getMenuInflater().inflate(R.menu.menu_main, menu);

       return true;

   }

   @Override

   public boolean onOptionsItemSelected(MenuItem item) {

       // Handle action bar item clicks here. The action bar will

       // automatically handle clicks on the Home/Up button, so long

       // as you specify a parent activity in AndroidManifest.xml.

       int id = item.getItemId();

       //noinspection SimplifiableIfStatement

       if (id == R.id.action_settings) {

           return true;

       }

   }

}