How to call another activity from drawing thread (SurfaceView)

The goal is something like this: I start the app, MainActivity starts a drawing thread. This thread draws until some events inside it happens(in my case value i>155) Then this thread stops drawing (but it should not be deleted, and values should not be lost) and starts another activity (a usual xml - file activity) When I want I should be able to get to my drawing thread and resume communicating with it from the place I stooped

To solve the problem I have decided to use a SurfaceView thread and Canvas inside (It would be good to make it a class, not to write it inside MainActivity, because I'm going to insert there a lot of code). I managed to start a thread and to draw something on my screen, but I can't change the activity. The best attempt was to create a handler inside MainActivity and to send there a message from my thread. The thread works OK, but it just freezes and nothing happens when it is time to change the Activity. In the log tab I can see that the thread sends a message, but the MainActivity can't see and handle it.

What should I do? What is the right eay of solving the problem? Please, help a beginner).

MainActivity code:

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.content.Intent;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MainActivity extends Activity {

    public  Handler  h  =new  Handler() {
        public void handleMessage(android.os.Message msg) {
            Log.i("","recieved");

            if(msg.what==1){
                Intent intent = new Intent(MainActivity.this,ScrollingActivity.class);
                MainActivity.this.startActivity(intent);
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new DrawView(this));

    }

    class DrawView extends SurfaceView implements SurfaceHolder.Callback {

        private DrawThread drawThread;

        public DrawView(Context context) {
            super(context);
            getHolder().addCallback(this);
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                                   int height) {

        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            drawThread = new DrawThread(getHolder());
            drawThread.setRunning(true);
            drawThread.start();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            boolean retry = true;
            drawThread.setRunning(false);
            while (retry) {
                try {
                    drawThread.join();
                    retry = false;
                } catch (InterruptedException e) {
                }
            }
        }

    }

}

DrawThread class code:

import android.graphics.Canvas;
import android.graphics.Color;
import android.os.Looper;
import android.util.Log;
import android.view.SurfaceHolder;

class DrawThread extends Thread {
    Canvas canvas;
    int i=0;
    private boolean running = false;
    private SurfaceHolder surfaceHolder;

    public DrawThread(SurfaceHolder surfaceHolder) {
        this.surfaceHolder = surfaceHolder;
    }

    public void setRunning(boolean running) {
        this.running = running;
    }

    @Override
    public void run() {
        Looper.prepare();
        while (running) {
            canvas = null;
            try {
                canvas = surfaceHolder.lockCanvas(null);
                draw();
            } finally {
                if (canvas != null) {
                    surfaceHolder.unlockCanvasAndPost(canvas);
                }
            }
        }
    }
    public void draw(){

        canvas.drawColor(Color.rgb(i,i,i));
        i++;
        if(i>155){
            i=0;
            running=false;
            sender snd = new sender();
            snd.send(1);


        }
    }
    private class sender extends MainActivity{
        public void send(int i){
            Log.i("","sending");
            try {
                h.sendEmptyMessage(i);
                Log.i("","sent");
            } catch (Exception e) {
                e.printStackTrace();
            }


        }
    }
}