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go from fragment to fragment besides navigation drawer also by button, help, I do not get it

Hello, glad to discuss here, I made an app with a navigation drawer with android studio template then link the fragments with the navigation view, finally create a fragment home link as well.

And now the thing is that I want to put those same options and fragments of the navigation view in the fragment start fragment_home.xml and fragment_home.java, to have the menu in a double way, those same fragment linked to buttons in the fragment_home.

The thing is that I tried with code like the intent and nothing, for like inside the java of the home, things with findviewbyID came out in red, I tried other codes.
Here is my code (althought i tried aswell with the third party keyboard that I have, I have not realized until you have answered, sorry and not be so hard, I have not stuck code because the truth seems that none of the ones I found work, I do not know if it would be better to upload a few screenshots

 

package com.redilexapps.ndrawerbaseasaide;

import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;


/**
* A simple {@link Fragment} subclass.
* Activities that contain this fragment must implement the
* {@link fragment_home.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {@link fragment_home#newInstance} factory method to
* create an instance of this fragment.
*/

public class fragment_home extends Fragment implements OnClickListener {

public fragment_home() {
}
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";

// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;

private OnFragmentInteractionListener mListener;


/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment fragment_home.
*/
// TODO: Rename and change types and number of parameters
public static
fragment_home newInstance(String param1, String param2) {
fragment_home fragment = new fragment_home();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}

@Override
public
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}


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

@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;
}

@Override
public
void onClick(View view) {

}

/**
* 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(Uri uri);

}



@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {

View rootView = inflater.inflate(R.layout.fragment_home, container, false);

Button fragment_gallery = (Button) rootView.findViewById(R.id.button2);

fragment_gallery.setOnClickListener(this);


return rootView;
}


public void replacefragment (fragment_home fragment_gallery) {
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_home, fragment_gallery);
transaction.addToBackStack(null);
transaction.commit();
}


}