public class TwoFragment extends Fragment {

            private View v;
            String myInt="";
            int cazzo2;
            String scelta3;

            public TwoFragment() {
                // Required empty public constructor
            }
            public static TwoFragment getInstance(String myInt,int cazzo2,String scelta3){
                TwoFragment twoFragment=new TwoFragment();
                twoFragment.myInt=myInt;
                twoFragment.cazzo2=cazzo2;
                twoFragment.scelta3=scelta3;
                return twoFragment;
            }

            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                     Bundle savedInstanceState) {
                // Inflate the layout for this fragment
                View rootView = inflater.inflate(R.layout.fragment_two, container, false);
                Button mButton = (Button) rootView.findViewById(R.id.newbutton);
                mButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {

                        //sendemail();
                        createPDF();
                        viewPDF();



                    }
                });
                TextView titolo3 = (TextView)rootView.findViewById(R.id.result);
                TextView titolo2 = (TextView)rootView.findViewById(R.id.result2);
                TextView titolo4 = (TextView)rootView.findViewById(R.id.resultpizze);

                titolo3.setText(myInt);
                titolo2.setText(String.valueOf(cazzo2));
                titolo4.setText(scelta3);

                return rootView;
            }
            /* public void sendemail(){

                 Intent intent = new Intent(Intent.ACTION_SEND);
                 intent.setData(Uri.parse("mailto:"));
                 String[] to={"marco_marcoletto@hotmail.it"};
                 intent.putExtra(Intent.EXTRA_EMAIL,to);
                 intent.putExtra(Intent.EXTRA_SUBJECT, "ciao");
                 intent.putExtra(Intent.EXTRA_TEXT, "zao");
                 intent.setType("message/rfc822");
                 chooser=intent.createChooser(intent,"manda email");
                 startActivity(chooser);
             }*/
            public void createPDF() {

                Document doc = new Document();

                try {
                    String path = Environment.getExternalStorageDirectory()
                            .getAbsolutePath() + "/droidText";

                    File dir = new File(path);
                    if (!dir.exists())
                        dir.mkdirs();

                    Log.d("PDFCreator", "PDF Path: " + path);

                    File file = new File(dir, "sample.pdf");
                    FileOutputStream fOut = new FileOutputStream(file);

                    PdfWriter.getInstance(doc, fOut);

                    // open the document
                    doc.open();
                    ByteArrayOutputStream stream = new ByteArrayOutputStream();
                    Bitmap bitmap = BitmapFactory.decodeResource(getContext()
                            .getResources(), R.drawable.androtuto);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    Image myImg = Image.getInstance(stream.toByteArray());
                    myImg.setAlignment(Image.MIDDLE);

                    // add image to document
                    doc.add(myImg);

                    Paragraph p1 = new Paragraph(myInt);
                    Log.d("ciao",myInt);

                    Font paraFont = new Font(Font.COURIER);
                    p1.setAlignment(Paragraph.ALIGN_CENTER);
                    p1.setFont(paraFont);

                    // add paragraph to document
                    doc.add(p1);

                    Paragraph p2 = new Paragraph("Ciao");
                    Font paraFont2 = new Font(Font.COURIER, 14.0f, Color.GREEN);
                    p2.setAlignment(Paragraph.ALIGN_CENTER);
                    p2.setFont(paraFont2);

                    doc.add(p2);

                    stream = new ByteArrayOutputStream();
                    bitmap = BitmapFactory.decodeResource(getContext()
                            .getResources(), R.drawable.android);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
                    myImg = Image.getInstance(stream.toByteArray());
                    myImg.setAlignment(Image.MIDDLE);

                    // add image to document
                    doc.add(myImg);

                    // set footer
                    Phrase footerText = new Phrase("Pied de page ");
                    HeaderFooter pdfFooter = new HeaderFooter(footerText, false);
                    doc.setFooter(pdfFooter);

                } catch (DocumentException de) {
                    Log.e("PDFCreator", "DocumentException:" + de);
                } catch (IOException e) {
                    Log.e("PDFCreator", "ioException:" + e);
                } finally {
                    doc.close();
                }

            }
            public void viewPDF(){
                String path = "/sdcard/droidText/sample.pdf";
                File targetFile = new File(path);
                Uri targetUri = Uri.fromFile(targetFile);

                Intent intent;
                intent = new Intent(Intent.ACTION_VIEW);
                intent.setDataAndType(targetUri, "application/pdf");

                startActivity(intent);
            }

        }


OTHER FRAGMENT:

      public class ThreeFragment extends Fragment implements
                android.widget.CompoundButton.OnCheckedChangeListener {

            ListView lv2;
            ArrayList<Planet> planetList;
            ListView lv;

            ArrayList<Birra> birraList;
            BirraAdapter biAdapter;
            PlanetAdapter plAdapter;
            Planet p;
            String myInt="";



            PlanetAdapter.PlanetHolder holder;


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


            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                     Bundle savedInstanceState) {
                // Inflate the layout for this fragment

                final ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_three, container, false);

                Button mButton = (Button) rootView.findViewById(R.id.button2);
                mButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View v) {
                        MyListFragment mlf=new MyListFragment();

                        mlf.showResult(v);
                        // MyListFragment.showResult(v);
                        showResult2(v);


                    }
                });
                //return inflater.inflate(R.layout.fragment_list2, container, false);
                return rootView;
            }


            @Override
            public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
                super.onViewCreated(view, savedInstanceState);

                lv2 = (ListView) getView().findViewById(R.id.listview2);
                displayBirraList();
            }


            private void displayBirraList() {

                birraList = new ArrayList<Birra>();
                birraList.add(new Birra("Paulaner", 6, "€"));
                birraList.add(new Birra("Forst", 7, "€"));
                birraList.add(new Birra("Peroni", 5, "€"));
                birraList.add(new Birra("Corona", 5, "€"));
                birraList.add(new Birra("Nastro Azzurro", 4, "€"));
                biAdapter = new BirraAdapter(birraList, getContext()) {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        int pos = lv2.getPositionForView(buttonView);
                        if (pos != ListView.INVALID_POSITION) {
                            Birra b = birraList.get(pos);
                            b.setSelected(isChecked);


                    /*Toast.makeText(
                        getActivity(),
                        "Clicked on Pizza: " + p.getName() + ". State: is "
                                + isChecked, Toast.LENGTH_SHORT).show();*/
                        }


                    }


                };


                lv2.setAdapter(biAdapter);
            }


            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {


                /*int pos = lv.getPositionForView(buttonView);
                if (pos != ListView.INVALID_POSITION) {
                    Planet p = planetList.get(pos);
                    p.setSelected(isChecked);


                    *//**//**//**//*Toast.makeText(
                        getActivity(),
                        "Clicked on Planet: " + p.getName() + ". State: is "
                                + isChecked, Toast.LENGTH_SHORT).show();*//**//**//**//*
                }
        */
            }


            public void showResult2(View v) {
                String result = "Selected Product are :";
                int totalAmount = 0;
                // String a = "";


                for (Birra b : biAdapter.getBox()) {

                    if (b.selected) {

                        result += "\n" + b.name + " " + b.distance + "€" + "q.tà :" + b.getQuantità();
                        int quantitaInt = Integer.parseInt(b.getQuantità());
                        totalAmount += b.distance * quantitaInt;
                        //  a=String.valueOf(totalAmount);


                    }
                }
              /*  for (Planet p : plAdapter.getBox()) {
                    if (p.isSelected()) {


                        result += "\n" + p.getName() + " " + p.getDistance() + "€" + "q.tà :" + p.getQuantità();
                        int quantitaInt = Integer.parseInt(p.getQuantità());
                        //totalAmount2+=p.distance * quantitaInt;
                        //z=String.valueOf(totalAmount2);


                    }
                }*/



                Toast.makeText(getActivity(), result + "\n" +myInt + "\n" + "Total Amount:=" + totalAmount + "€", Toast.LENGTH_LONG).show();
                TwoFragment fgsearch2 = TwoFragment.getInstance(result,totalAmount,"test");
                android.support.v4.app.FragmentTransaction transaction2 = getActivity().getSupportFragmentManager().beginTransaction();
                transaction2.replace(R.id.content_main, fgsearch2);
                transaction2.commit();




            }
        }