Android studio 7. Develop simple quiz app

-

Just follow the foolowing link for developing a quiz app

https://www.youtube.com/watch?v=JA9s_Fntg_4&t=139s


The codes corresponding to above video is given below.

MainActivity.java

*****************************************************************************************************************************************
package com.example.hp_pc.hpluniv;

import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    Button answer1, answer2, answer3, answer4;

    TextView score, question;

    private Questions mQuestions= new Questions();

    private String mAnswer;
    private int mScore = 0;
    private int mQuestionslength=mQuestions.mQuestions.length;

    Random r;


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

        r = new Random();

        answer1 = (Button) findViewById(R.id.answer1);
        answer2 = (Button) findViewById(R.id.answer2);
        answer3 = (Button) findViewById(R.id.answer3);
        answer4 = (Button) findViewById(R.id.answer4);

        score = (TextView) findViewById(R.id.score);
        question = (TextView) findViewById(R.id.question);

        updateQuestion(r.nextInt(mQuestionslength));

        answer1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            if(answer1.getText()==mAnswer) {
                mScore++;
                score.setText("Score " + mScore);
                updateQuestion(r.nextInt(mQuestionslength));
            }else{
                    gameOver();
                }
            }
            }
        );

        answer2.setOnClickListener(new View.OnClickListener() {
                                       @Override
                                       public void onClick(View view) {
                                           if (answer2.getText() == mAnswer) {
                                               mScore++;
                                               score.setText("Score " + mScore);
                                               updateQuestion(r.nextInt(mQuestionslength));
                                           } else {
                                               gameOver();
                                           }
                                       }
                                   }
        );
        answer3.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if(answer3.getText()==mAnswer) {
                        mScore++;
                        score.setText("Score " + mScore);
                        updateQuestion(r.nextInt(mQuestionslength));
                    }
                    else{
                        gameOver();
                    }
                }

            }
        );

        answer4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (answer4.getText() == mAnswer) {
                    mScore++;
                    score.setText("Score " + mScore);
                    updateQuestion(r.nextInt(mQuestionslength));
                } else {
                    gameOver();
                }
            }

        }
        );
    }

    private void updateQuestion(int num) {
        question.setText(mQuestions.getQuestion(num));
        answer1.setText(mQuestions.getChoice1(num));
        answer2.setText(mQuestions.getChoice2(num));
        answer3.setText(mQuestions.getChoice3(num));
        answer4.setText(mQuestions.getChoice4(num));

        mAnswer=mQuestions.getCorrectAnswer(num);
    }
    private void gameOver(){
        AlertDialog.Builder alertDiaLogBuilder= new AlertDialog.Builder(MainActivity.this);
        alertDiaLogBuilder
                .setMessage("GameOver! Your Score is" +mScore+" Points.")
                .setCancelable(false)
                .setPositiveButton("New Game",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                startActivity(new Intent(getApplication(),MainActivity.class));
                            }
                        }
                )
                .setNegativeButton("EXIT",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                    finish();
                    }
                }
        );

    }
}




***********************************************************************************************************************

Questions.java

********************************************
package com.example.hp_pc.hpluniv;

/**
 * Quiz app
 */

public class Questions {
    public String mQuestions[]={

            "which is the first planet in the solar system?",
            "which is the second planet in the solar system?",
            "which is the third planet in the solar system?",
            "which is the fourth planet in the solar system?",
            "which is the fifth planet in the solar system?",
            "which is the sixth planet in the solar system?",
            "which is the seventh planet in the solar system?",
            "which is the eighth planet in the solar system?",
            "which is the nineth planet in the solar system?"
    };

    private String mChoices[][]={

            {"Mercury","Venus","Mars","Saturn"},
            {"Jupitor","Venus","Earth","Neptune"},
            {"Earth","Jupitor","Pluto","Venus"},
            {"Jupitor","Saturn","Mars","Earth"},
            {"Jupitor","Pluto","Mercury","Earth"},
            {"Uranus","Venus","Mars","Saturn"},
            {"Saturn","Pluto","Uranous","Earth"},
            {"Venus","Neptune","Pluto","Mars"},
            {"Mercury","Venus","Mars","Pluto"}
    };

    private String mCorrectAnswers[]={"Mercury","Venus","Earth","Mars","Jupitor","Saturn","Uranous","Neptune","Pluto"};

    public String getQuestion(int a){
        String question=mQuestions[a];
        return question;
    }
    public String getChoice1(int a){
            String choice=mChoices[a][0];
            return choice;
    }
    public String getChoice2(int a){
        String choice=mChoices[a][1];
        return choice;
    }
    public String getChoice3(int a){
        String choice=mChoices[a][2];
        return choice;
    }
    public String getChoice4(int a){
        String choice=mChoices[a][3];
        return choice;
    }
    public String getCorrectAnswer(int a){
        String answer=mCorrectAnswers[a];
        return answer;
    }
}


**********************************************************
activity_main.xml
**********************************************************
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="com.example.hp_pc.hpluniv.MainActivity">

    <Button
        android:id="@+id/answer4"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Button"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/answer3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Button"
        app:layout_constraintBottom_toTopOf="@+id/answer4"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/answer2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Button"
        app:layout_constraintBottom_toTopOf="@+id/answer3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/answer1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:text="Button"
        app:layout_constraintBottom_toTopOf="@+id/answer2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <TextView
        android:id="@+id/score"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="16dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:text="TextView"
        android:gravity="center"
        android:textSize="24dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/question"
        android:layout_width="376dp"
        android:layout_height="233dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:text="TextView"
        android:gravity="center"
        app:layout_constraintBottom_toTopOf="@+id/answer1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/score" />
</android.support.constraint.ConstraintLayout>


*************************************************************
strings.xml
****************************************
<resources>
    <string name="app_name">HPLUNI</string>
</resources>


*********************************************
styles.xml
********************************************
<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>






Comments

Post a Comment

Popular posts from this blog

Android studio 8 Radio Group and Radio Buttons

-
Image
Radio Buttons Radio buttons allow the user to select one option from a set. You should use radio buttons for optional sets that are mutually exclusive if you think that the user needs to see all available options side-by-side. If it's not necessary to show all options side-by-side, use a  spinner  instead. To create each radio button option, create a  RadioButton  in your layout. However, because radio buttons are mutually exclusive, you must group them together inside a  RadioGroup . By grouping them together, the system ensures that only one radio button can be selected at a time. Key classes are the following: RadioButton RadioGroup Responding to Click Events When the user selects one of the radio buttons, the corresponding  RadioButton  object receives an on-click event. To define the click event handler for a button, add the  android:onClick  attribute to the  <RadioButton>  element in your XML layout. ...
Read more

Android studio 2 Creation of a simple app

-
Image
Create an Android Project This lesson shows you how to create a new Android project with Android Studio and describes some of the files in the project. First, be sure you have installed the latest version of Android Studio. Download Android Studio here . In the Welcome to Android Studio window, click Start a new Android Studio project . Or if you have a project opened, select File > New Project . In the Create New Project window, enter the following values: Application Name : "My First App" Company Domain : "example.com" You might want to change the project location. Also, if you want to write a Kotlin app, check the Include Kotlin support checkbox. Leave the other options as they are. Click Next . In the Target Android Devices screen, keep the default values and click Next . In the Add an Activity to Mobile screen, select Empty Activity and click Next . In the Configure Activity screen, keep the...
Read more