MainActivity.java

gistfile1.txt

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 mQuestionsLenght =  mQuestions.mQuestions.length;
    Random r = new Random();
    
    



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



        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);

        score.setText("Score: " + mScore);

        updateQuestion(r.nextInt(mQuestionsLenght));

        answer1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (answer1.getText().equals(mAnswer)) {
                    mScore++;
                    score.setText("Score: " + mScore);
                    updateQuestion(r.nextInt(mQuestionsLenght));
                } else {
                    gameOver();
                }

            }
        });

        answer2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (answer2.getText().equals(mAnswer)) {
                    mScore++;
                    score.setText("Score: " + mScore);
                    updateQuestion(r.nextInt(mQuestionsLenght));
                } else {
                    gameOver();
                }

            }
        });

        answer3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (answer3.getText().equals(mAnswer)) {
                    mScore++;
                    score.setText("Score: " + mScore);
                    updateQuestion(r.nextInt(mQuestionsLenght));
                } else {
                    gameOver();
                }

            }
        });

        answer4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                if (answer4.getText().equals(mAnswer)) {
                    mScore++;
                    score.setText("Score: " + mScore);
                    updateQuestion(r.nextInt(mQuestionsLenght));
                } 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("You failed! Score is : " + mScore + " points.")
                .setCancelable(false)
                .setPositiveButton("Start over!",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                startActivity(new Intent(getApplicationContext(), MainActivity.class));
                                finish();

                            }
                        })

                .setNegativeButton("Exit!",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                finish();

                            }
                        });

        AlertDialog alertDialog = alertDialogBuilder.create();
        alertDialog.show();

    }
}