Question

package is.hi.hbv601g.mathstermind;

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

import com.google.firebase.auth.FirebaseAuth;

import is.hi.hbv601g.mathstermind.model.MyDataHelper;

public class PlayGameActivity extends AppCompatActivity {

    private static final int easyQuestionNumber = 4;
    private static final int mediumQuestionNumber = 4;
    private static final int hardQuestionNumber = 4;

    private static final String[] easyQuestions = {"1+2 =", "7-2 =", "5*3 =", "12/4="};
    private static final String[][] easyAnswers = { {"3", "4", "6", "1"},
                                                    {"5", "8", "9", "4"},
                                                    {"10", "8", "15", "20"},
                                                    {"0", "8", "3", "4"}};
    private static final String[] easyCorrect = {"3", "5", "15", "3"};

    private static final String[] mediumQuestions = {"5+(3*7)+5=", "12+3*9-2=", "3^2 + 4^2 - 2^3 =", "4^2(5^2-16/4)-1="};
    private static final String[][] mediumAnswers = {   {"10", "42", "31", "20"},
                                                        {"27", "47", "57", "37"},
                                                        {"15", "17", "26", "6"},
                                                        {"204", "335", "125", "225"}};
    private static final String[] mediumCorrect = {"31", "37", "17", "335"};

    private static final String[] hardQuestions = {"(1/6 + 1/12 + 1/20 + 1/30) -2 =", "10*9*8*7*6*5*4*3*2*1 =", "Y=log x\nIf y=10, then what is x?", "20% of 2 is equal to"};
    private static final String[][] hardAnswers = { {"-5/3", "1.6667", "5/4", "4/5"},
                                                    {"100", "1000", "10^10", "10!"},
                                                    {"x=10", "x=1", "x=5", "x=15"},
                                                    {"20", "4", "0.4", "0.04"}};
    private static final String[] hardCorrect = {"-5/3", "10!", "x=1", "0.4"};

    // uniform structures to use no matter what level is chosen
    private String[] questions;
    private String[][] answers;
    private String[] correct;
    private int questionNumber;

    private TextView question;
    private Button button1;
    private Button button2;
    private Button button3;
    private Button button4;
    private Button btnSkip;

    private int currQuestion;
    private int score;
    private Toast toast;

    private MyDataHelper model;
    private FirebaseAuth firebaseAuth;

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

        question = (TextView) findViewById(R.id.question);
        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);
        button3 = (Button) findViewById(R.id.button3);
        button4 = (Button) findViewById(R.id.button4);
        btnSkip = (Button) findViewById(R.id.btnSkip);
        currQuestion = -1;
        score = 0;

        Intent intent = getIntent();
        String level = intent.getStringExtra("level");

        model = new MyDataHelper(this);
        firebaseAuth = FirebaseAuth.getInstance();

        switch (level) {
            case "easy":
                questions = easyQuestions;
                answers = easyAnswers;
                correct = easyCorrect;
                questionNumber = easyQuestionNumber;
                break;
            case "medium":
                questions = mediumQuestions;
                answers = mediumAnswers;
                correct = mediumCorrect;
                questionNumber = mediumQuestionNumber;
                break;
            case "hard":
                questions = hardQuestions;
                answers = hardAnswers;
                correct = hardCorrect;
                questionNumber = hardQuestionNumber;
                break;
        }

        displayNextQuestion();
    }

    private void displayNextQuestion() {
        currQuestion++;
        if (currQuestion < questionNumber) {
            question.setText(questions[currQuestion]);
            button1.setText(answers[currQuestion][0]);
            button2.setText(answers[currQuestion][1]);
            button3.setText(answers[currQuestion][2]);
            button4.setText(answers[currQuestion][3]);

        }else{
            toast.cancel();
            Toast.makeText(this, "Your score is: "+score, Toast.LENGTH_LONG ).show();
            String email = firebaseAuth.getCurrentUser().getEmail();
            model.writeScore(email, score);
            finish();

        }
    }


    public void answerClicked(View view) {

        switch (view.getId()){
            case R.id.button1:
                if (correct[currQuestion].equals(answers[currQuestion][0])){
                    toast = Toast.makeText(this, "Correct Answer", Toast.LENGTH_SHORT);
                    score++;
                }else{
                    toast = Toast.makeText(this, "Wrong Answer", Toast.LENGTH_SHORT);

                }
                break;
            case R.id.button2:
                if (correct[currQuestion].equals(answers[currQuestion][1])){
                    toast = Toast.makeText(this, "Correct Answer", Toast.LENGTH_SHORT);
                    score++;
                }else{
                    toast = Toast.makeText(this, "Wrong Answer", Toast.LENGTH_SHORT);

                }
                break;
            case R.id.button3:
                if (correct[currQuestion].equals(answers[currQuestion][2])){
                    toast = Toast.makeText(this, "Correct Answer", Toast.LENGTH_SHORT);
                    score++;
                }else{
                    toast = Toast.makeText(this, "Wrong Answer", Toast.LENGTH_SHORT);

                }
                break;
            case R.id.button4:
                if (correct[currQuestion].equals(answers[currQuestion][3])){
                    toast = Toast.makeText(this, "Correct Answer", Toast.LENGTH_SHORT);
                    score++;
                }else{
                    toast = Toast.makeText(this, "Wrong Answer", Toast.LENGTH_SHORT);

                }
                break;


        }
        toast.show();
        displayNextQuestion();
    }
}

Complete the following function for the button: "btnSkip" - when clicked it is supposed to show the next question on the android quiz.

Answer 1

// below function will give next question. Also find comments inline
private void skipQuestion() {
        currQuestion++; // increase the count of currQuestion by 1
        if (currQuestion < questionNumber) { // check if currQuestion is less than total ques
            question.setText(questions[currQuestion]); // set question text
            button1.setText(answers[currQuestion][0]);// set option 1
            button2.setText(answers[currQuestion][1]); // set option 2
            button3.setText(answers[currQuestion][2]); // set option 3
            button4.setText(answers[currQuestion][3]); // set option 4

        }else{ // if skipping to next question make count more than available question show score and finish
            toast.cancel();
            Toast.makeText(this, "Your score is: "+score, Toast.LENGTH_LONG ).show(); // show score
            String email = firebaseAuth.getCurrentUser().getEmail();
            model.writeScore(email, score); // write score
            finish(); // finish current activity

        }
    }