在同一活动中将数据片段传递给片段

我有一些问题想询问有关在活动中将数据从一个片段传递到另一个片段的问题。我不知道该怎么做。有人可以帮忙吗？ 这是我的代码。

ShareFragment.java

package com.example.user8.myapplication;


import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;


/**    
 * A simple {@link Fragment} subclass.
 */
public class ShareFragment extends Fragment implements             AdapterView.OnItemSelectedListener{

private Spinner spinner1,spinner2,spinner3;
private Button btn_submit,btn_selDate;
private FirebaseAuth auth;
FirebaseUser firebaseUser;

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

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

    btn_selDate = (Button) v.findViewById(R.id.btn_selDate);

    btn_selDate.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Initialize a new date picker dialog fragment
            DialogFragment dFragment = new DatePickerFragment();

            // Show the date picker dialog fragment
            dFragment.show(getFragmentManager(), "Date Picker");

        }
    });

    btn_submit = (Button) v.findViewById(R.id.btn_submit_food);

    spinner1 = (Spinner)v.findViewById(R.id.spinner_selectFood);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getContext(),R.array.spinner_food,R.layout.support_simple_spinner_dropdown_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner1.setAdapter(adapter);
    spinner1.setOnItemSelectedListener(this);

    spinner3 = (Spinner)v.findViewById(R.id.spinner_selectTime);
    ArrayAdapter<CharSequence> adapter3 = ArrayAdapter.createFromResource(getContext(),R.array.spinner_time,R.layout.support_simple_spinner_dropdown_item);
    adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner3.setAdapter(adapter3);
    spinner3.setOnItemSelectedListener(this);

    auth = FirebaseAuth.getInstance();

    btn_submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            DatabaseReference ref = FirebaseDatabase.getInstance().getReference("Food").push();
            firebaseUser = auth.getCurrentUser();
            String uid = firebaseUser.getUid();
            String u_food = spinner1.getSelectedItem().toString();
            String u_time= spinner3.getSelectedItem().toString();

            Food myFood = new Food(uid,u_food,"formatteddate",u_time);//data pass to here to save into firebase
            ref.setValue(myFood).addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    if (task.isSuccessful()) {
                        Toast.makeText(getContext(), getString(R.string.share_food_success_msg), Toast.LENGTH_SHORT).show();
                        getActivity().finish();
                        startActivity(new Intent(getContext(), Main2Activity.class));
                    } else {
                        Toast.makeText(getContext(),  getString(R.string.share_food_fail_msg), Toast.LENGTH_SHORT).show();
                        getActivity().finish();
                        startActivity(new Intent(getContext(), Main3Activity.class));
                    }
                }
            });
        }
    });
    return v;
}

public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog dpd = new DatePickerDialog(getActivity(),
                AlertDialog.THEME_HOLO_LIGHT, this, year, month, day);

        /*
            add(int field, int value)
                Adds the given amount to a Calendar field.
         */
        // Add 3 days to Calendar
        calendar.add(Calendar.DATE, 3);

        dpd.getDatePicker().setMaxDate(calendar.getTimeInMillis());

        // Subtract 6 days from Calendar updated date
        calendar.add(Calendar.DATE, -6);

        // Set the Calendar new date as minimum date of date picker
        dpd.getDatePicker().setMinDate(calendar.getTimeInMillis());

        // So, now date picker selectable date range is 7 days only

        // Return the DatePickerDialog
        return dpd;
    }

    public void onDateSet(DatePicker view, int year, int month, int day) {
        // Do something with the chosen date
        TextView tv = (TextView) getActivity().findViewById(R.id.tv);

        // Create a Date variable/object with user chosen date
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(0);
        cal.set(year, month, day, 0, 0, 0);
        Date chosenDate = cal.getTime();

        // Format the date using style and locale
        DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, Locale.US);
        String formattedDate = df.format(chosenDate);

        // Display the chosen date to app interface
        tv.setText(formattedDate);//formattedDate is the data that I want to pass to myFood.
    }
}

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    String text = parent.getItemAtPosition(position).toString();
}

@Override
public void onNothingSelected(AdapterView<?> parent) {

}
}

我的应用程序的流程是用户可以选择食物、选择日期（从当前日期算起 7 天）和时间列表，然后单击提交。数据库将接收所有数据并保存到 firebase 中。

我们可以使用Bundle发送数据fragment到另一个fragment

发送片段

RecievingFragment fragment = new RecievingFragment ();
Bundle args = new Bundle();
args.putString("Key", "Value");
fragment.setArguments(args);

getFragmentManager().beginTransaction().add(R.id.container, fragment).commit();

接收片段

In onCreateView新片段的：

String value = getArguments().getString("YourKey");