Btukfyl

So I am trying to make an app that will allow you to log different medications using a fire base database. I'm currently receiving this error when I launch the app.

11-26 13:48:37.056 6958-6958/com.example.andrew.pilltracker E/AndroidRuntime: FATAL EXCEPTION: main

Process: com.example.andrew.pilltracker, PID: 6958

com.google.firebase.database.DatabaseException: Can't convert object of type java.util.ArrayList to type com.example.andrew.pilltracker.Pill

    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(com.google.firebase:firebase-database@@16.0.4:423)

    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(com.google.firebase:firebase-database@@16.0.4:214)

    at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(com.google.firebase:firebase-database@@16.0.4:79)

    at com.google.firebase.database.DataSnapshot.getValue(com.google.firebase:firebase-database@@16.0.4:212)

    at com.example.andrew.pilltracker.MainActivityController.showData(MainActivityController.java:86)

    at com.example.andrew.pilltracker.MainActivityController.access$100(MainActivityController.java:21)

    at com.example.andrew.pilltracker.MainActivityController$2.onDataChange(MainActivityController.java:71)

    at com.google.firebase.database.core.ValueEventRegistration.fireEvent(com.google.firebase:firebase-database@@16.0.4:75)

    at com.google.firebase.database.core.view.DataEvent.fire(com.google.firebase:firebase-database@@16.0.4:63)

    at com.google.firebase.database.core.view.EventRaiser$1.run(com.google.firebase:firebase-database@@16.0.4:55)

    at android.os.Handler.handleCallback(Handler.java:789)

    at android.os.Handler.dispatchMessage(Handler.java:98)

    at android.os.Looper.loop(Looper.java:164)

    at android.app.ActivityThread.main(ActivityThread.java:6938)

    at java.lang.reflect.Method.invoke(Native Method)

    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)

    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)`

I don't know what the deal is. I'm trying to have the main controller import information about the pills from the database, and another activity creates the database for the pills, but I don't know how to transfer the reference data from the second activity to the main activity. I also don't know why I'm receiving this error. Below I've attached the main controller and the pill class. Thanks for your help!

package com.example.andrew.pilltracker;



import android.content.Intent;

import android.os.Bundle;

import android.support.annotation.NonNull;

import android.support.design.widget.BottomNavigationView;

import android.support.v7.app.AppCompatActivity;

import android.view.MenuItem;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.TextView;



import com.google.firebase.database.DataSnapshot;

import com.google.firebase.database.DatabaseError;

import com.google.firebase.database.DatabaseReference;

import com.google.firebase.database.FirebaseDatabase;

import com.google.firebase.database.ValueEventListener;



import java.util.ArrayList;



public class MainActivityController extends AppCompatActivity {



private TextView mTextMessage;

private int databaseRef = 1;

private ListView mListView;



private FirebaseDatabase mFirebaseDatabase;

DatabaseReference mRootRef;

ArrayList<String> array = new ArrayList<>();







private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener

        = new BottomNavigationView.OnNavigationItemSelectedListener() {



    @Override

    public boolean onNavigationItemSelected(@NonNull MenuItem item) {

        switch (item.getItemId()) {

            case R.id.navigation_home:

                mTextMessage.setText(R.string.title_home);

                return true;

            case R.id.navigation_dashboard:

                Intent intent = new Intent(MainActivityController.this, SecondActvty.class);

                startActivity(intent);

                return true;

            case R.id.navigation_notifications:

                mTextMessage.setText(R.string.title_notifications);

                return true;

        }

        return false;

    }

};



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main_view);



    mListView = (ListView) findViewById(R.id.listview);



    mFirebaseDatabase = FirebaseDatabase.getInstance();

    mRootRef = mFirebaseDatabase.getReference();



    mTextMessage = (TextView) findViewById(R.id.message);

    BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);

    navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);



    mRootRef.addValueEventListener(new ValueEventListener() {

        @Override

        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

           showData(dataSnapshot);

        }



        @Override

        public void onCancelled(@NonNull DatabaseError databaseError) {



        }

    });



}



private void showData(DataSnapshot dataSnapshot){

    for(DataSnapshot ds : dataSnapshot.getChildren()){

        Pill pInfo = new Pill();



        pInfo.setName(ds.getValue(Pill.class).getName());

        pInfo.setCount(ds.child(Integer.toString(databaseRef)).getValue(Pill.class).getCount());

        pInfo.setDose(ds.child(Integer.toString(databaseRef)).getValue(Pill.class).getDose());

        pInfo.setDay(ds.child(Integer.toString(databaseRef)).getValue(Pill.class).getDay());



        array.add(pInfo.getName());

        array.add("Number of Pills Left: " + pInfo.getCount());

        array.add("Number of Pills per Dose: " + pInfo.getDose());

        array.add("Number of Doses per Day: " + pInfo.getDay());

        ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, array);

        mListView.setAdapter(adapter);



    }

}



//Database shit

@Override

protected void onStart(){

    super.onStart();





}

}