The QUIZ GAME project for education of Android framework.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.disinas.quiz.MainActivity"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/question1"/>

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/question1">
        <RadioButton
            android:id="@+id/correct_answer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/answer1"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/answer1"/>
        <RadioButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/answer1"/>
    </RadioGroup>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/score_button"
        android:onClick="score_button"/>

    <TextView
        android:id="@+id/score_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="test"
         />
</LinearLayout>

MainActivity.java

package com.example.disinas.quiz;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.view.View;


public class MainActivity extends AppCompatActivity {
    int score = 0;

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

    private void checkQuestion1(){
        RadioGroup questionRadioGroup = (RadioGroup) findViewById(R.id.question1);
        if (questionRadioGroup.getCheckedRadioButtonId() == R.id.correct_answer)
            score++;


    }

    private void displayScore( int score){
       TextView scoreTextView = (TextView) findViewById(R.id.score_text_view);

        String message = "Score: " + score;
        scoreTextView.setText(message);
    }

    public void score_button(View view){
        score = 0;
        checkQuestion1();
        displayScore(score);

    }
}

strings.xml

<resources>
    <string name="app_name">Quiz</string>
    <string name="question1">WHAT.....?</string>
    <string name="answer1">This is fdsfdfd fds fds fdsf dsff</string>
    <string name="score_button">Submit answers</string>
</resources>