2 aktivite arasa son skoru paylaşma

Merhaba iyi günler.Ben 2 aktivite arası bilgi aktaramı yapmak istiyorum.2 gündür uğraşıyorum(acemi seviyedeyim mazur görün)beceremedim.Intet denedim yapamadım textView ile almayı denedim olmuyor.Cevabı verecek kişi cevabı kırmızı harflerle yazarsa hatamı anlayabilirim.

• BİRİNCİ AKTİVİTE

package com.taylansular.bluebird;

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

import java.util.Random;

public class MainActivity extends AppCompatActivity {
    public final static String EXTRA_MESSAGE = "skor";

    TextView scoreText;
    TextView timeText;
    ImageView imageView1;
    ImageView imageView2;
    ImageView imageView3;
    ImageView imageView4;
    ImageView imageView5;
    ImageView imageView6;
    ImageView imageView7;
    ImageView imageView8;
    ImageView imageView9;
    ImageView imageView10;
    ImageView imageView11;
    ImageView imageView12;
    ImageView imageView13;
    ImageView imageView14;
    ImageView imageView15;
    ImageView imageView16;
    int score;
    ImageView [] imageArray;
    Handler handler;
    Runnable runnable;
    Bundle bundle;

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

        imageView1 = (ImageView) findViewById(R.id.imageView);
        imageView2 = (ImageView) findViewById(R.id.imageView2);
        imageView3 = (ImageView) findViewById(R.id.imageView3);
        imageView4 = (ImageView) findViewById(R.id.imageView4);
        imageView5 = (ImageView) findViewById(R.id.imageView5);
        imageView6 = (ImageView) findViewById(R.id.imageView6);
        imageView7 = (ImageView) findViewById(R.id.imageView7);
        imageView8 = (ImageView) findViewById(R.id.imageView8);
        imageView9 = (ImageView) findViewById(R.id.imageView9);
        imageView10 = (ImageView) findViewById(R.id.imageView10);
        imageView11= (ImageView) findViewById(R.id.imageView11);
        imageView12= (ImageView) findViewById(R.id.imageView12);
        imageView13= (ImageView) findViewById(R.id.imageView13);
        imageView14 = (ImageView) findViewById(R.id.imageView14);
        imageView15= (ImageView) findViewById(R.id.imageView15);
        imageView16= (ImageView) findViewById(R.id.imageView16);
        imageArray = new ImageView[]{imageView1, imageView2,imageView3, imageView4,imageView5, imageView6,imageView7, imageView8,imageView9, imageView10,imageView11, imageView12,imageView13, imageView14,imageView15, imageView16};

        hideImages();

        score = 0;


        CountDownTimer start = new CountDownTimer(10000, 1000) {


            @Override
            public void onTick(long millisUntilFinished) {
                timeText = (TextView) findViewById(R.id.textTime);
                timeText.setText("Time : " + millisUntilFinished / 1000);
            }

            @Override
            public void onFinish() {
                timeText = (TextView) findViewById(R.id.textTime);
                timeText.setText("Time is up ! ");
                handler.removeCallbacks(runnable);

                for (ImageView image : imageArray) {
                    image.setVisibility(View.INVISIBLE);
                }
                int x = 0;
                if (score < 10){
                    Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                    MainActivity.this.startActivity(intent);

                }
                else if (score > 10){

                    Intent intent = new Intent(MainActivity.this, Main3Activity.class);
                    MainActivity.this.startActivity(intent);

                }


            }

        }.start();




        }

        public void skoruArttır(View view){

        scoreText = (TextView) findViewById(R.id.textScore);

        score++;

        scoreText.setText("Score " + score);


    }





    public void hideImages(){
        handler = new Handler();
        runnable = new Runnable(){

            @Override
            public void run() {
                for (ImageView image : imageArray){
                    image.setVisibility(View.INVISIBLE);

                }

                Random r = new Random();
                int i = r.nextInt(15-0);
                imageArray[i].setVisibility(View.VISIBLE);

                handler.postDelayed(this, 1000);
            }
        };


        handler.post(runnable);
    }



}

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• İKİNCİ AKTİVİTE 

package com.taylansular.bluebird;

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

public class Main2Activity extends AppCompatActivity {

    TextView textView;
    int score;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        TextView textView = (TextView) findViewById(R.id.seninskorun);


        Button yenidenbasla = (Button) findViewById(R.id.yenidenbasla);

        yenidenbasla.setOnClickListener(
                new Button.OnClickListener() {
                    public void onClick(View view) {
                        Intent ıntent = new Intent(Main2Activity.this, MainActivity.class);
                        startActivity(ıntent);
                    }
                }
        );






    }




}