colors.xmlactivity_starting_screen.xmlactivity_quiz.xmlStartingScreenActivity.java
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#795548</color>
    <color name="colorPrimaryDark">#5D4037</color>
    <color name="colorAccent">#FFEB3B</color>

    <color name="colorBackground">#BCAAA4</color>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="@color/colorBackground"
    android:padding="16dp"
    tools:context="com.codinginflow.myawesomequiz.StartingScreenActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:text="My Awesome Quiz"
        android:textColor="@android:color/black"
        android:textSize="35sp" />

    <TextView
        android:id="@+id/text_view_highscore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@id/button_start_quiz"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="32dp"
        android:text="Highscore: 0"
        android:textSize="20sp" />

    <Button
        android:id="@+id/button_start_quiz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="Start Quiz" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="@color/colorBackground"
    android:padding="16dp"
    tools:context="com.codinginflow.myawesomequiz.QuizActivity">

    <TextView
        android:id="@+id/text_view_score"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Score: 0"
        android:textColor="@android:color/black" />

    <TextView
        android:id="@+id/text_view_question_count"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/text_view_score"
        android:text="Question: 1/x"
        android:textColor="@android:color/black" />

    <TextView
        android:id="@+id/text_view_countdown"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:text="00:30"
        android:textColor="@android:color/black"
        android:textSize="40sp" />

    <TextView
        android:id="@+id/text_view_question"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@id/radio_group"
        android:layout_marginBottom="16dp"
        android:text="Here will be the question text\nHere will be the question text\nHere will be the question text"
        android:textAlignment="center"
        android:textColor="@android:color/black"
        android:textSize="20sp" />

    <RadioGroup
        android:id="@+id/radio_group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true">

        <RadioButton
            android:id="@+id/radio_button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 1" />

        <RadioButton
            android:id="@+id/radio_button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 2" />

        <RadioButton
            android:id="@+id/radio_button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 3" />

    </RadioGroup>

    <Button
        android:id="@+id/button_confirm_next"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/radio_group"
        android:layout_marginTop="16dp"
        android:text="Confirm" />

</RelativeLayout>

package com.codinginflow.myawesomequiz;

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

public class StartingScreenActivity extends AppCompatActivity {

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

        Button buttonStartQuiz = findViewById(R.id.button_start_quiz);
        buttonStartQuiz.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startQuiz();
            }
        });
    }

    private void startQuiz() {
        Intent intent = new Intent(StartingScreenActivity.this, QuizActivity.class);
        startActivity(intent);
    }
}