Von einer Klasse in eine GameOver Klasse

package com.example.a223;


import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.view.MotionEvent;
import android.view.View;




public class GameView extends View {
/*
Farbtabelle
0 = blau
1 = black
2 = red
 */


    //Maih
    MainActivity mainActivity = new MainActivity();


    //Ball
    private int blueX;
    private int blueY = -40;
     int blueSpeed = 15;
    private Paint bluePaint = new Paint();
    private int zufallzahl;
    //Game
    public boolean gameOver = false;
    private Paint gameOverPaint = new Paint();
    private int currColor = 0;
    public int currGameColor = 0;
    public int score = 0;
    private boolean touchflg = false;
    private boolean gamenotStart = true;
    private boolean starttap = false;
    private Paint untenviereckPaint = new Paint();
     Paint lvlUpPaint = new Paint();
     int currLvl =1;
    int currLvlUpScore = 10;






    //canvas
     int canvasWith;
     int canvasHigh;


    //Status Check










    //Score
    private Paint scorePaint = new Paint();




    public GameView(Context context) {
        super(context);


        scorePaint.setColor(Color.BLACK);
        scorePaint.setTextSize(55);
        scorePaint.setTypeface(Typeface.DEFAULT_BOLD);
        scorePaint.setAntiAlias(true);


        gameOverPaint.setColor(Color.BLACK);
        gameOverPaint.setTextSize(70);
        gameOverPaint.setTypeface(Typeface.DEFAULT_BOLD);
        gameOverPaint.setAntiAlias(true);


        lvlUpPaint.setColor(Color.LTGRAY);
        lvlUpPaint.setTextSize(60);
        lvlUpPaint.setTypeface(Typeface.SANS_SERIF);
        lvlUpPaint.setAntiAlias(true);


        //bluePaint.setColor(Color.BLUE);






    }


    @Override
    protected void onDraw(Canvas canvas) {


        canvasWith = getWidth();
        canvasHigh = getHeight();














        //Blue Ball










        if(touchflg){
            if(currGameColor == 0)  untenviereckPaint.setColor(Color.BLUE);
            if(currGameColor == 1) untenviereckPaint.setColor(Color.BLACK);
            if(currGameColor == 2) untenviereckPaint.setColor(Color.RED);
            if(currGameColor ==3) untenviereckPaint.setColor(Color.GREEN);




        }












        if(gamenotStart){
            canvas.drawText("Tap Screen to start Game!",getWidth()/6,getHeight()/2 ,gameOverPaint);


            if(starttap){


                gamenotStart = false;






            }




        }


        //Game Over
        else if(gameOver){








        }else{










            blueX = canvasWith / 2;
            blueY +=blueSpeed;
            if(blueY > canvasHigh - 200 ) {
                if(score == currLvlUpScore){
                    currLvl++;
                    blueSpeed = blueSpeed+1;
                    currLvlUpScore = currLvlUpScore+currLvlUpScore+currLvl;


                }


                blueY = -80;


                zufallzahl = (int) Math.floor(Math.random() * 4);


                if (currColor == currGameColor) {


                    score++;
                } else {


                    gameOver = true;
                }
        }




        }
        if(zufallzahl == 0){
            bluePaint.setColor(Color.BLUE);
            currColor = 0;


        }else if (zufallzahl == 1){
            bluePaint.setColor(Color.BLACK);
            currColor = 1;


        }else if(zufallzahl == 2){
            bluePaint.setColor(Color.RED);
            currColor = 2;
        }else if(zufallzahl == 3){
            bluePaint.setColor(Color.GREEN);
            currColor = 3;
        }








        canvas.drawRect(0,canvasHigh,canvasWith,canvasHigh - 200,untenviereckPaint);




        canvas.drawCircle(canvasWith/2,canvasHigh-60,50,untenviereckPaint);
        canvas.drawCircle(blueX, blueY,30,bluePaint);


        canvas.drawText("Score : " + score, 50,100,scorePaint);
        canvas.drawText("Level : " + currLvl , canvasWith-300,100,scorePaint);


}


    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(event.getAction() == (MotionEvent.ACTION_DOWN)){
            if(gamenotStart) starttap = true;
            if(gameOver){
                score = 0;
                gameOver = false;
                return true;




            }


        currGameColor ++;
        if(currGameColor == 4) currGameColor =0;


        touchflg = true;
        }
        return true;






    }
}

setContentView(gameView);


    timer.schedule(new TimerTask() {
        @Override
        public void run() {
            handler.post(new Runnable() {
                @Override
                public void run() {
                    gameView.invalidate();
                    gameOver = gameView.gameOver;
                    if (gameOver) {


                        setContentView(R.layout.activity_game_over);
                    }


                }
            });
        }
    }, 0, TIMER_INTERVAL);

package com.example..a223;


import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;


import java.util.Timer;
import java.util.TimerTask;


public class gameOver extends AppCompatActivity {




    GameView gameView;
    MainActivity mainActivity;
    TextView scoreView;
    private int score;




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


        gameView = new GameView(this);


        score = gameView.score;


        mainActivity = new MainActivity();






    }
public void onClick(View v){


        mainActivity.gameSchleife();


}


}

public void gameSchleife(){




        setContentView(gameView);


        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        gameView.invalidate();
                        gameOver = gameView.gameOver;
                        if (gameOver) {
                            timer.cancel();
                            setContentView(R.layout.activity_main);
                        }


                    }
                });
            }
        }, 0, TIMER_INTERVAL);


    }