Free Source Code of Awesome Online Quiz App using Firebase

Free Source Code of Awesome Online Quiz App using Firebase is written below,

MainActivity.java:

package com.example.quiz;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
   Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn=findViewById(R.id.start);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,Quotions.class);
                startActivity(intent);
            }
        });

    }
}

mainactivity.xml:

<?xml version=”1.0″ encoding=”utf-8″?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android”

    xmlns:app=”http://schemas.android.com/apk/res-auto”

    xmlns:tools=”http://schemas.android.com/tools”

    android:layout_width=”match_parent”

    android:layout_height=”match_parent”

    android:background=”@drawable/back8″

    tools:context=”.MainActivity”>



    <TextView

        android:id=”@+id/textView5″

        android:layout_width=”wrap_content”

        android:layout_height=”wrap_content”

        android:text=”Online Quiz”

        android:textAlignment=”center”

        android:textColor=”#FFFFFF”

        android:textSize=”36sp”

        android:textStyle=”bold”

        app:layout_constraintBottom_toBottomOf=”parent”

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toTopOf=”parent”

        app:layout_constraintVertical_bias=”0.054″ />



    <TextView

        android:id=”@+id/textView7″

        android:layout_width=”350dp”

        android:layout_height=”wrap_content”

        android:text=”~Total Marks is 10″

        android:textAlignment=”viewStart”

        android:textColor=”#FFFFFF”

        android:textSize=”26sp”

        app:layout_constraintBottom_toTopOf=”@+id/textView11″

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintHorizontal_bias=”0.737″

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toBottomOf=”@+id/textView10″ />



    <TextView

        android:id=”@+id/textView10″

        android:layout_width=”350dp”

        android:layout_height=”wrap_content”

        android:layout_marginTop=”80dp”

        android:text=”~Total Questions is 5″

        android:textAlignment=”viewStart”

        android:textColor=”#FFFFFF”

        android:textSize=”26sp”

        app:layout_constraintBottom_toTopOf=”@+id/textView7″

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintHorizontal_bias=”0.737″

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toBottomOf=”@+id/textView5″ />



    <TextView

        android:id=”@+id/textView11″

        android:layout_width=”350dp”

        android:layout_height=”wrap_content”

        android:text=”~Each Question Marks is 2″

        android:textAlignment=”viewStart”

        android:textColor=”#FFFFFF”

        android:textSize=”26sp”

        app:layout_constraintBottom_toTopOf=”@+id/start”

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintHorizontal_bias=”0.737″

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toBottomOf=”@+id/textView7″

        app:layout_constraintVertical_bias=”0.07″ />



    <Button

        android:id=”@+id/start”

        android:layout_width=”wrap_content”

        android:layout_height=”wrap_content”

        android:layout_marginBottom=”200dp”

        android:padding=”10dp”

        android:background=”#E91E63″

        android:text=”START QUIZ”

        android:textColor=”#FFFFFF”

        android:textSize=”24sp”

        app:layout_constraintBottom_toBottomOf=”parent”

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintHorizontal_bias=”0.497″

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toBottomOf=”@+id/textView11″

        app:layout_constraintVertical_bias=”0.294″ />



    <TextView

        android:id=”@+id/textView”

        android:layout_width=”wrap_content”

        android:layout_height=”wrap_content”

        android:text=”Instructions:”

        android:textAlignment=”viewStart”

        android:textColor=”#FFFFFF”

        android:textSize=”30sp”

        android:textStyle=”bold”

        app:layout_constraintBottom_toTopOf=”@+id/textView10″

        app:layout_constraintEnd_toEndOf=”parent”

        app:layout_constraintHorizontal_bias=”0.025″

        app:layout_constraintStart_toStartOf=”parent”

        app:layout_constraintTop_toBottomOf=”@+id/textView5″

        app:layout_constraintVertical_bias=”0.594″ />

</androidx.constraintlayout.widget.ConstraintLayout>

Quetion.java:

package com.example.quiz;



import androidx.annotation.Nullable;

import androidx.appcompat.app.AppCompatActivity;

import androidx.recyclerview.widget.RecyclerView;



import android.app.ProgressDialog;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.TextView;



import com.firebase.ui.firestore.FirestoreRecyclerAdapter;

import com.google.firebase.firestore.DocumentReference;

import com.google.firebase.firestore.DocumentSnapshot;

import com.google.firebase.firestore.EventListener;

import com.google.firebase.firestore.FirebaseFirestore;

import com.google.firebase.firestore.FirebaseFirestoreException;



public class Quetions extends AppCompatActivity {

    private RecyclerView rcv;

    private FirebaseFirestore db;

    private FirestoreRecyclerAdapter fra;

    TextView ques;

    Button next;

    RadioGroup radioGroup;

    RadioButton op1,op2,op3,op4;

    int serial=1;

    int marks=0;

    String ans;

    ProgressDialog pd;





    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_quotions);



        ques=findViewById(R.id.question);

        next=findViewById(R.id.next);

        radioGroup=findViewById(R.id.group);

        radioGroup.clearCheck();

        op1=findViewById(R.id.option1);

        op2=findViewById(R.id.option2);

        op3=findViewById(R.id.option3);

        op4=findViewById(R.id.option4);

        pd=new ProgressDialog(this);

        pd.setMessage("Loading...");

        pd.show();

        db=FirebaseFirestore.getInstance();



        DocumentReference documentReference=db.collection("Quiz").document(String.valueOf(serial));

        documentReference.addSnapshotListener(new EventListener<DocumentSnapshot>() {

            @Override

            public void onEvent(@Nullable DocumentSnapshot value, @Nullable FirebaseFirestoreException error) {





                ques.setText("Q"+serial+": "+ value.getString("q"));

                op1.setText(value.getString("op1"));

                op2.setText(value.getString("op2"));

                op3.setText(value.getString("op3"));

                op4.setText(value.getString("op4"));

                ans=value.getString("ans");

                pd.dismiss();

            }

        });













        next.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                pd.show();



                radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                    @Override

                    public void onCheckedChanged(RadioGroup group, int checkedId) {

                        RadioButton radioButton=(RadioButton)group.findViewById(checkedId);



                    }

                });



                int selectedId = radioGroup.getCheckedRadioButtonId();

                RadioButton radioButton = (RadioButton)radioGroup.findViewById(selectedId);

                String option = (String) radioButton.getText();

                if(ans.equals(option)) {

                    marks=marks+2;



                }else {



                }

                radioGroup.clearCheck();

                serial++;

                db= FirebaseFirestore.getInstance();

                DocumentReference documentReference=db.collection("Quiz").document(String.valueOf(serial));

                documentReference.addSnapshotListener(new EventListener<DocumentSnapshot>() {

                    @Override

                    public void onEvent(@Nullable DocumentSnapshot value, @Nullable FirebaseFirestoreException error) {





                        ques.setText("Q"+serial+": "+ value.getString("q"));

                        op1.setText(value.getString("op1"));

                        op2.setText(value.getString("op2"));

                        op3.setText(value.getString("op3"));

                        op4.setText(value.getString("op4"));

                        ans=value.getString("ans");

                        pd.dismiss();

                    }

                });







                if (serial==5){

                    next.setText("SUBMIT");

                }

                if (serial==6){



                    Intent intent=new Intent(Quetions.this,Result.class);

                    String mark = ""+marks;

                    intent.putExtra("marks",mark);

                    startActivity(intent);

                }



            }

        });



    }

}

quetion.xml:

<?xml version=”1.0″ encoding=”utf-8″?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android”
    xmlns:app=”http://schemas.android.com/apk/res-auto”
    xmlns:tools=”http://schemas.android.com/tools”
    android:layout_width=”match_parent”
    android:layout_height=”match_parent”
    android:background=”@drawable/back8″
    tools:context=”.Quotions”>
    <androidx.cardview.widget.CardView
        android:id=”@+id/ques”
        android:layout_width=”409dp”
        android:layout_height=”wrap_content”
        android:background=”@drawable/back8″
        app:contentPadding=”10dp”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toTopOf=”parent”
        app:layout_constraintVertical_bias=”0.19999999″>

        <LinearLayout
            android:layout_width=”match_parent”
            android:layout_height=”wrap_content”
            android:background=”@drawable/back8″
            android:orientation=”vertical”>

            <TextView
                android:id=”@+id/question”
                android:layout_width=”match_parent”
                android:layout_height=”wrap_content”
                android:layout_marginLeft=”20dp”
                android:textColor=”#FFFFFF”
                android:textSize=”22sp” />

            <RadioGroup
                android:id=”@+id/group”
                android:layout_width=”wrap_content”
                android:layout_height=”wrap_content”
                android:layout_marginTop=”20dp”>

                <RadioButton
                    android:id=”@+id/option1″
                    android:layout_width=”wrap_content”
                    android:layout_height=”wrap_content”
                    android:layout_marginLeft=”50dp”
                    android:layout_marginTop=”5dp”
                    android:buttonTint=”#FFFFFF”
                    android:textColor=”#FFFFFF”
                    android:textSize=”18sp” />

                <RadioButton
                    android:id=”@+id/option2″
                    android:layout_width=”wrap_content”
                    android:layout_height=”wrap_content”
                    android:layout_marginLeft=”50dp”
                    android:layout_marginTop=”5dp”
                    android:buttonTint=”#FFFFFF”
                    android:textColor=”#FFFFFF”
                    android:textSize=”18sp” />

                <RadioButton
                    android:id=”@+id/option3″
                    android:layout_width=”wrap_content”
                    android:layout_height=”wrap_content”
                    android:layout_marginLeft=”50dp”
                    android:layout_marginTop=”5dp”
                    android:buttonTint=”#FFFFFF”
                    android:textColor=”#FFFFFF”
                    android:textSize=”18sp” />

                <RadioButton
                    android:id=”@+id/option4″
                    android:layout_width=”wrap_content”
                    android:layout_height=”wrap_content”
                    android:layout_marginLeft=”50dp”
                    android:layout_marginTop=”5dp”
                    android:buttonTint=”#FFFFFF”
                    android:textColor=”#FFFFFF”
                    android:textSize=”18sp” />
            </RadioGroup>


        </LinearLayout>


    </androidx.cardview.widget.CardView>

    <Button
        android:id=”@+id/next”
        android:layout_width=”wrap_content”
        android:layout_height=”wrap_content”
        android:padding=”5dp”
        android:background=”#E91E63″
        android:layout_marginBottom=”200dp”
        android:text=”NEXT”
        android:textColor=”#FFFFFF”
        android:textSize=”24sp”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toBottomOf=”@+id/ques” />


</androidx.constraintlayout.widget.ConstraintLayout>

Result.java:

package com.example.quiz;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class Result extends AppCompatActivity {

    Button btn;
    TextView res;

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

        btn=findViewById(R.id.home);
        res=findViewById(R.id.res);
        Bundle b= getIntent().getExtras();
        String marks=b.getString("marks");
        res.setText("Obtained Marks is "+marks);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Result.this,MainActivity.class);
                startActivity(intent);
            }
        });

    }
}

result.xml:

<?xml version=”1.0″ encoding=”utf-8″?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android”
    xmlns:app=”http://schemas.android.com/apk/res-auto”
    xmlns:tools=”http://schemas.android.com/tools”
    android:layout_width=”match_parent”
    android:layout_height=”match_parent”
    android:background=”@drawable/back8″
    tools:context=”.Result”>

    <TextView
        android:id=”@+id/textView8″
        android:layout_width=”wrap_content”
        android:layout_height=”wrap_content”
        android:text=”Result”
        android:textColor=”#EFF2F3″
        android:textSize=”36sp”
        android:textStyle=”bold”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toTopOf=”parent”
        app:layout_constraintVertical_bias=”0.067″ />

    <TextView
        android:id=”@+id/textView12″
        android:layout_width=”wrap_content”
        android:layout_height=”wrap_content”
        android:text=”Total Marks is 10″
        android:textColor=”#673AB7″
        android:textSize=”30sp”
        android:textStyle=”bold”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toBottomOf=”@+id/textView8″
        app:layout_constraintVertical_bias=”0.17000002″ />

    <TextView
        android:id=”@+id/res”
        android:layout_width=”wrap_content”
        android:layout_height=”wrap_content”
        android:text=”Obtained Marks is”
        android:textColor=”#4CAF50″
        android:textSize=”30sp”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintHorizontal_bias=”0.502″
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toBottomOf=”@+id/textView8″
        app:layout_constraintVertical_bias=”0.363″ />

    <Button
        android:id=”@+id/home”
        android:layout_width=”wrap_content”
        android:layout_height=”wrap_content”
        android:padding=”10dp”
        android:layout_marginBottom=”200dp”
        android:background=”#E8296A”
        android:text=”Home”
        android:textColor=”#FFFFFF”
        android:textSize=”36sp”
        android:textStyle=”bold”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toBottomOf=”@+id/res” />


</androidx.constraintlayout.widget.ConstraintLayout>

Gradle:

implementation ‘com.google.firebase:firebase-firestore:21.5.0’
implementation ‘com.google.firebase:firebase-core:17.4.4’
implementation ‘com.firebaseui:firebase-ui-firestore:4.1.0’
implementation ‘androidx.recyclerview:recyclerview:1.1.0’
implementation “androidx.cardview:cardview:1.0.0”

Manifests file:

<uses-permission android:name=”android.permission.INTERNET” />

Firestore Insert Question Manually for Online Quiz App:

Free Source Code of Awesome Online Quiz App using Firebase

Output of Free Source Code of Awesome Online Quiz App using Firebase

Free Source Code of Awesome Online Quiz App using Firebase

Source Code of Awesome Online Quiz App using Firebase
Source Code of Awesome Online Quiz App using Firebase
Free Source Code of Awesome Online Quiz App using Firebase

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