To pass data from one fragment to another in android we simply make use of Bundle .

In this example I am sending three String  from MainActivityFragment(Fragment)  to SecondFragment(Fragment) with the help of Bundle. 

Below is the code for the MainActivityFragment.

MainActivityFragment.java

public class MainActivityFragment extends Fragment {

private EditText memail_et,muser_name_et,mphone_et;
private Button sign_up_btn;
private String memail,muser_name,mphone_number;

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView=inflater.inflate(R.layout.fragment_main_activity, container, false);

        memail_et=(EditText)rootView.findViewById(R.id.email_et);
        muser_name_et=(EditText)rootView.findViewById(R.id.user_name_et);
        mphone_et=(EditText)rootView.findViewById(R.id.mobile_no_et);
        sign_up_btn=(Button)rootView.findViewById(R.id.sign_up_btn);
        sign_up_btn.setOnClickListener(mClickListener);
              return rootView;
    }
View.OnClickListener mClickListener=new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      
    memail=memail_et.getText().toString();
            muser_name=muser_name_et.getText().toString();
            mphone_number=mphone_et.getText().toString();

     FragmentTransaction transection=getFragmentManager().beginTransaction();
            SecondFragment mfragment=new SecondFragment();

//using Bundle to send data 
            Bundle bundle=new Bundle();
            bundle.putString("email",memail);
            bundle.putString("user_name",muser_name);
            bundle.putString("phone",mphone_number);
            mfragment.setArguments(bundle); //data being send to SecondFragment
            transection.replace(R.id.main_fragment, mfragment);
            transection.commit();
  }

    }

}

Add the below code to your SecondFragment.

SecondFragment.java

public class SecondFragment extends Fragment {

private TextView memail,mphone,muser;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootview = inflater.inflate(R.layout.fragment_second, container, false);
        memail=(TextView)rootview.findViewById(R.id.mail);
        mphone=(TextView)rootview.findViewById(R.id.phone_number);
        muser=(TextView)rootview.findViewById(R.id.user_name);

//retrieving data using bundle

        Bundle bundle=getArguments();
        memail.setText(String.valueOf(bundle.getString("email")));
        muser.setText(String.valueOf(bundle.getString("user_name")));
        mphone.setText(String.valueOf(bundle.getString("phone")));
        return rootview;
    
}



}