having real trouble in this app ; : <p>i Created this app but after adding the marks showing feature .....</p>

<p>even with a lot of work i am not able to debug it    </p>

<p>They are not letting me post as there is mostly code (
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<pre><code>package com.example.user.questions;

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

import java.util.Arrays;

import static android.widget.Toast.makeText;
import static com.example.user.questions.R.string.your_answer;

public class MainActivity extends AppCompatActivity {

    private Button mTrueButton;
    private Button mFalseButton;
    private TextView mQuestionTextView;
    private Button mNextButton;
    private static final String  TAG = "QuizActivity";
    private static final String KEY_INDEX = "index";
    private int marksObtained = 0;
    private TextView mShowAnswers;



    //array for question
    private Question[] mQuestionBank = new Question[]
            {
              new Question( R.string.question_inc , true )  ,

              new Question( R.string.question_nda , true ),

              new Question( R.string.question_sex , false )
            };
    private int mCurrentIndex = 0 ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_main );

        mTrueButton = findViewById( R.id.true_button );

        mFalseButton = findViewById( R.id.false_button );


        mNextButton = findViewById( R.id.next_button );
        mQuestionTextView = findViewById( R.id.questions_text );
        mShowAnswers = findViewById( R.id.show_result );

        //using nezt button here cause it should implement before setting text og question
        updateQuestion();
        mNextButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length ;

                    updateQuestion();
                    showAnswers( mCurrentIndex );

            }
        } );




        mTrueButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                checkAnswers( true );
                mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length ;

                updateQuestion();
                showAnswers( mCurrentIndex );


            }
        } );
        mFalseButton.setOnClickListener( new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                checkAnswers( false );
                mCurrentIndex = (mCurrentIndex + 1) % mQuestionBank.length ;

                updateQuestion();
                showAnswers( mCurrentIndex );
            }
        } );

    }
    private void updateQuestion() {
        int questions = mQuestionBank[mCurrentIndex].getTextResId();
        mQuestionTextView.setText( questions );    }

        private  void checkAnswers (boolean mUserPressedTrue){
            boolean answerIsTrue = mQuestionBank[mCurrentIndex].isAnswerTrue();

            int messageResId = 0;
            if (answerIsTrue == mUserPressedTrue) {
                messageResId = R.string.correct_toast;
                marksObtained = marksObtained + 1 ;

            } else {
                messageResId = R.string.wrong_toast;
            }

Toast.makeText( this , messageResId , Toast.LENGTH_SHORT ).show();

        }
    @Override
    public void onSaveInstanceState (Bundle savedInstanceState){
        super.onSaveInstanceState( savedInstanceState );
        savedInstanceState.putInt( KEY_INDEX , mCurrentIndex );
    }
    public void showAnswers (int var){
        if (var == 2) mShowAnswers.setText( marksObtained );
    }
}
</code></pre>

<p><a href="https://i.stack.imgur.com/melY9.png" rel="nofollow noreferrer">log cat while i click last "next_button" hit</a></p>
