I have some problem want to ask about passing data from fragment to fragment in an activity. I have no idea how to do this. Anybody can help? Here is my code.
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) {
}
}
My app's flow is user can choose food, select date (7 days from current date), and a list of time, then after click submit. database will receive all the data and save into firebase.
