如何按日期过滤多个文档中的数据 Firestore，Android，Java

Question

Could someone help me with a query I'm trying? I have put some test data to Firestore to test my app. I want to query the data of the current users signed in and then get only the data that was saved to the database today. I want to get the highest and lowest temperature of the current day and also the same for a pulse. At the moment my code gets all of those, but when I try to compare the current date to the one in the database, so I can retrieve only the data from today, I only get the newest one. So example if I have to documents from to day, I only get the latest one. My code looks like this at the moment:

package com.example.wht;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.cardview.widget.CardView;

import android.content.Intent;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;

import com.example.wht.model.WhtItem;
import com.example.wht.ui.WhtRecyclerAdapter;
import com.example.wht.util.WhtApi;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import com.google.firebase.firestore.QueryDocumentSnapshot;
import com.google.firebase.firestore.QuerySnapshot;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;


public class MainPageActivity extends AppCompatActivity implements View.OnClickListener {
    private TextView highestPulse, lowestPulse;
    private TextView highestTemp, lowestTemp;
    private TextView time;
    private ImageButton tempButton;
    private CardView pulseCardView, tempCardView;
    private Toolbar toolbar;
    private List<Integer> tempItemList;
    private List<Integer> pulseItemList;
    private List<WhtItem> itemList;
    private String htemp;
    private int minTemp ;
    private String ltemp;
    private int maxPulse;
    private String hpulse;
    private int minPulse;
    private String lpulse;
    private int maxTemp;
    private String dateAdded;

    private FirebaseAuth firebaseAuth;
    private FirebaseAuth.AuthStateListener authStateListener;
    private FirebaseUser user;
    private FirebaseFirestore db = FirebaseFirestore.getInstance();

    //Firestore conneection
    private CollectionReference collectionReference = db.collection("whtitem");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_page);

        toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        firebaseAuth = FirebaseAuth.getInstance();
        user = firebaseAuth.getCurrentUser();

        highestPulse = findViewById(R.id.highest_pulse_mainpage);
        lowestPulse = findViewById(R.id.lowest_pulse_mainpage);
        highestTemp = findViewById(R.id.highest_temperature_text);
        lowestTemp = findViewById(R.id.lowest_temp_text);
        time = findViewById(R.id.time_mainpage); //TARKISTA
        tempButton = findViewById(R.id.imageButton);
        pulseCardView = findViewById(R.id.pulse_cardView);
        tempCardView = findViewById(R.id.body_heat_cardview);
        tempItemList = new ArrayList<>();
        pulseItemList = new ArrayList<>();
        itemList = new ArrayList<>();

        tempButton.setOnClickListener(this);
        pulseCardView.setOnClickListener(this);
        tempCardView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.imageButton:
                //TODO go to temp_history_activity
                break;
            case R.id.pulse_cardView:
                //TODO go to pulse_history_activity
                break;
            case R.id.body_heat_cardview:
                startActivity(new Intent(MainPageActivity.this, TimeTempActivity.class));
                break;
        }

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case R.id.profile:
                //add take users to add journal
                if (user != null && firebaseAuth!=null){
                  startActivity(new Intent(MainPageActivity.this, ProfileActivity.class));
                    //finish();
                }
                break;
            case R.id.temp_history:
               /*if (user != null && firebaseAuth!=null) {
                    startActivity(new Intent(MainPageActivity.this, TempHistoryActivity.class));
                    //finish();
                }
                break;*/
            case R.id.pulse_history:
               /*if (user != null && firebaseAuth!=null) {
                    startActivity(new Intent(MainPageActivity.this, PulseHistoryActivity.class));
                    //finish();
                }
                break;*/
            case R.id.time_in_temp_history:
               if (user != null && firebaseAuth!=null) {
                    startActivity(new Intent(MainPageActivity.this, TimeTempActivity.class));
                    //finish();
                }
                break;
            case R.id.action_signout:
                //signout
                if (user != null && firebaseAuth!=null){
                    firebaseAuth.signOut();
                    startActivity(new Intent(MainPageActivity.this, MainActivity.class));
                    //finish();
                }
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onStart() {
        super.onStart();
        final Timestamp ts = new Timestamp(System.currentTimeMillis());
        final Date cDate = new Date(ts.getTime());
        final String currentDate =  DateFormat.format("dd/MM/yyyy", cDate).toString();

        collectionReference.whereEqualTo("userId", WhtApi.getInstance()
                .getUserId())
                .whereEqualTo("date", cDate)
                .get()
                .addOnSuccessListener(new OnSuccessListener<QuerySnapshot>() {
                    @Override
                    public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
                        if (!queryDocumentSnapshots.isEmpty()){

                            for (QueryDocumentSnapshot whtitems : queryDocumentSnapshots) {
                                WhtItem whtItem = whtitems.toObject(WhtItem.class);
                                itemList.add(whtItem);

                                Date dAdded = whtItem.getDate();
                                dateAdded = DateFormat.format("dd/MM/yyyy", dAdded).toString();

                                tempItemList.add(whtItem.getTemperature());
                                pulseItemList.add(whtItem.getPulse());

                                maxTemp = Collections.max(tempItemList);
                                htemp = "Korkein: " + maxTemp + " astetta";
                                minTemp = Collections.min(tempItemList);
                                ltemp = "Matalin: " + minTemp + " astetta";
                                maxPulse = Collections.max(pulseItemList);
                                hpulse = "Korkein: " + maxPulse + " bpm";
                                minPulse = Collections.min(pulseItemList);
                                lpulse = "Matalin: " + minPulse + " bpm";
                            }
                            if (currentDate.equals(dateAdded)) {
                                highestTemp.setText(htemp);
                                lowestTemp.setText(ltemp);
                                highestPulse.setText(hpulse);
                                lowestPulse.setText(lpulse);
                            }else {
                                Toast.makeText(MainPageActivity.this, "Ei dataa tältä päivältä", Toast.LENGTH_SHORT).show();
                            }
                        }else {
                            Toast.makeText(MainPageActivity.this, "Virhe dataa haettaessa", Toast.LENGTH_SHORT).show();
                        }
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Toast.makeText(MainPageActivity.this, "Ei dataa näytettäväksi", Toast.LENGTH_SHORT).show();

                    }
                });

    }
}

And here is my POJO:

package com.example.wht.model;


import com.google.firebase.firestore.ServerTimestamp;

import java.util.Date;


public class WhtItem {
    private String nameUser, userId;
    private String password;
    private int temperature, pulse;
    private @ServerTimestamp java.util.Date date;
    private int duration;

    public WhtItem() {
    }

    public WhtItem(String nameUser, String userId, String password, int temperature, int pulse, java.util.Date date, int duration) {
        this.nameUser = nameUser;
        this.userId = userId;
        this.password = password;
        this.temperature = temperature;
        this.pulse = pulse;
        this.date = date;
        this.duration = duration;
    }

    public String getNameUser() {
        return nameUser;
    }

    public void setNameUser(String nameUser) {
        this.nameUser = nameUser;
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getTemperature() {
        return temperature;
    }

    public void setTemperature(int temperature) {
        this.temperature = temperature;
    }

    public int getPulse() {
        return pulse;
    }

    public void setPulse(int pulse) {
        this.pulse = pulse;
    }

    public java.util.Date getDate() {
        return date;
    }

    public void setDate(Date dateAdded) {
        this.date = dateAdded;
    }

    public int getDuration() {
        return duration;
    }

    public void setDuration(int duration) {
        this.duration = duration;
    }
}

My Firestore documents are in the following form: Firestore database

Can someone tell where am I going wrong with this? I tried to google and search but no luck.

Answer 1

the query for filter document data of FirebaseStore :

 Query query = FirebaseFirestore.getInstance().collection(TABLE_KEY_COMMENT)
                .whereEqualTo("disucssionId",discussionID)
                .orderBy("date", Query.Direction.DESCENDING);

try to use like this query and pass correct param