Brain Tester Application in Android Studio
By Rahul KumarHello Everyone! In this Android tutorial, we are going to create a Brain Tester Application in android studio. To perform this task we will be going to use java. We are going to use java to develop a Brain Tester. We can use any version of Android Studio.
Create Brain Tester App in Android Studio
Let’s start by opening the android studio and create a new project.
- First, we need to design the front-end of the application we write code in activity_main.xml.
- Second, we need to providing functionality to our application we write java code in the MainActivity.java file.
- Now start building the project.
<?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"
tools:context=".MainActivity">
<Button
android:id="@+id/Gobutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="105dp"
android:layout_marginLeft="105dp"
android:layout_marginTop="325dp"
android:layout_marginEnd="89dp"
android:layout_marginRight="89dp"
android:layout_marginBottom="305dp"
android:background="#667B1FA2"
android:onClick="GoButton"
android:padding="30sp"
android:text=" GO! "
android:textSize="45sp"
android:visibility="invisible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/gameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<GridLayout
android:id="@+id/gridLayout"
android:layout_width="300dp"
android:layout_height="250dp"
android:layout_marginTop="90dp"
android:background="@android:color/black"
android:columnCount="2"
android:rowCount="2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.495"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/question">
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="0"
android:layout_rowWeight="1"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_gravity="fill"
android:layout_margin="4dp"
android:background="#FFB5EC84"
android:onClick="ChooseAnswer"
android:tag="0"
android:text="14"
android:textSize="30dp" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="0"
android:layout_rowWeight="1"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_gravity="fill"
android:layout_margin="4dp"
android:background="#FFB5EC84"
android:onClick="ChooseAnswer"
android:tag="1"
android:text="15"
android:textSize="30dp" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="1"
android:layout_rowWeight="1"
android:layout_column="0"
android:layout_columnWeight="1"
android:layout_gravity="fill"
android:layout_margin="4dp"
android:background="#FFB5EC84"
android:onClick="ChooseAnswer"
android:tag="2"
android:text="10"
android:textSize="30dp" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_row="1"
android:layout_rowWeight="1"
android:layout_column="1"
android:layout_columnWeight="1"
android:layout_gravity="fill"
android:layout_margin="4dp"
android:background="#FFB5EC84"
android:onClick="ChooseAnswer"
android:tag="3"
android:text="5"
android:textSize="30dp" />
</GridLayout>
<TextView
android:id="@+id/question"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="60dp"
android:layout_marginLeft="60dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="60dp"
android:layout_marginRight="60dp"
android:background="#FBC02D"
android:padding="10sp"
android:text="10+5"
android:textSize="40sp"
app:layout_constraintEnd_toStartOf="@+id/score"
app:layout_constraintStart_toEndOf="@+id/timer"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="17dp"
android:layout_marginLeft="17dp"
android:layout_marginTop="16dp"
android:background="#303F9F"
android:padding="10sp"
android:text="30"
android:textColor="@android:color/white"
android:textSize="40sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/score"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:background="#303F9F"
android:padding="10sp"
android:text="0/0"
android:textColor="@android:color/white"
android:textSize="40sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/correct"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="132dp"
android:layout_marginLeft="132dp"
android:layout_marginTop="24dp"
android:background="#FF53A8D6"
android:padding="10dp"
android:text="Correct!"
android:textColor="@android:color/white"
android:textSize="35sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/gridLayout" />
<Button
android:id="@+id/playAgain"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="88dp"
android:layout_marginLeft="88dp"
android:layout_marginTop="20dp"
android:background="#FBC02D"
android:onClick="PlayAgain"
android:padding="10dp"
android:text="Play Again"
android:textSize="30sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/correct" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>Now we are linking XML to java to provide the functionality to our application.
- From XML to Java, we use onClick Listener in Java.
- Define a variable in XML(e.g – android:id=”@+id/button) which is called by onClick Listener.
- In Your Main Activity, we use a Bundle to pass the data between various activities of Android.
- We can map the data from the string value to various data types with the help of parsing using Bundle.
- In this Application we Several functions or methods like the onCreate method of our project, we created objects of TextView, EditText, and button and extent function of java.
- In this app, we use Random variables to generate random.
package com.example.braintestergame;
import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.constraintlayout.widget.Constraints;
import android.opengl.Visibility;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
Button go;
ConstraintLayout gameLayout;
ArrayList<Integer> options = new ArrayList<Integer>();
TextView resultText;
TextView scoreTextView;
int score = 0, numberOfQuestions = 0;
int setAnswerPosition;
TextView questionText;
Button playAgainButton;
TextView timer;
Button option1;
Button option2;
Button option3;
Button option4;
public void PlayAgain(final View view) {
playAgainButton.setVisibility(view.INVISIBLE);
score = 0;
numberOfQuestions = 0;
timer.setText("30s");
scoreTextView.setText(Integer.toString(numberOfQuestions) + "/" + Integer.toString(score));
newQuestion();
new CountDownTimer(30000 + 100, 1000) {
@Override
public void onTick(long millisUntilFinished) {
timer.setText(String.valueOf(millisUntilFinished / 1000) + "s");
}
@Override
public void onFinish() {
playAgainButton.setVisibility(view.VISIBLE);
resultText.setText("Done!");
option1.setClickable(false);
option2.setClickable(false);
option3.setClickable(false);
option4.setClickable(false);
timer.setText("0s");
}
}.start();
}
public void GoButton(View view) {
go.setVisibility(view.INVISIBLE);
gameLayout.setVisibility(view.VISIBLE);
PlayAgain(findViewById(R.id.timer));
}
public void ChooseAnswer(View view) {
if (Integer.toString(setAnswerPosition).equals(view.getTag().toString())) {
resultText.setText("Correct!");
score++;
} else {
resultText.setText("Wrong :(");
}
numberOfQuestions++;
scoreTextView.setText(Integer.toString(numberOfQuestions) + "/" + Integer.toString(score));
newQuestion();
}
public void newQuestion() {
Random random = new Random();
int a = random.nextInt(21);
int b = random.nextInt(21);
questionText = (TextView) findViewById(R.id.question);
questionText.setText(Integer.toString(a) + "+" + Integer.toString(b));
setAnswerPosition = random.nextInt(4);
options.clear();
for (int i = 0; i < 4; i++) {
if (i == setAnswerPosition) {
options.add(a + b);
} else {
int wrongAnswers = random.nextInt(41);
while (wrongAnswers == a + b) {
wrongAnswers = random.nextInt(41);
}
options.add(wrongAnswers);
}
}
option1.setText(Integer.toString(options.get(0)));
option2.setText(Integer.toString(options.get(1)));
option3.setText(Integer.toString(options.get(2)));
option4.setText(Integer.toString(options.get(3)));
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
go = (Button) findViewById(R.id.Gobutton);
gameLayout = (ConstraintLayout) findViewById(R.id.gameLayout);
go.setVisibility(View.VISIBLE);
gameLayout.setVisibility(View.INVISIBLE);
option1 = (Button) findViewById(R.id.button1);
option2 = (Button) findViewById(R.id.button2);
option3 = (Button) findViewById(R.id.button3);
option4 = (Button) findViewById(R.id.button4);
playAgainButton = (Button) findViewById(R.id.playAgain);
resultText = findViewById(R.id.correct);
scoreTextView = findViewById(R.id.score);
timer = (TextView) findViewById(R.id.timer);
}
}Now, You can understand how to make brain tester game applications using android studio.
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