Android : How to start an activity from a thread when a particular condition is satisfied?

Please check the following code

public void run() {
        while(isItOk){
            if(!holder.getSurface().isValid()){
                continue;
            }
            if(limitcounter>limitframes){
                isItOk=false;
                //want to launch an activity when this condition is satisfired
                 continue;
            }
            framecounter++;
            score=framecounter;
            if(hit){
                counter++;
                if(counter>50){
                    counter=0;
                    hit=false;
                    rys=0;
                    cx=900;
                    groan=true;
                    ux=1280;
                }
            }
            Canvas killRoom=holder.lockCanvas();
            mx=killRoom.getWidth()/2;
            my=killRoom.getHeight()/2;
            ry=killRoom.getHeight()/25;
            draw(killRoom);
            limitcounter++;
            holder.unlockCanvasAndPost(killRoom);
            if(speed<=70)
                speed+=5;
            else speed=20;
        }
    }

I am new to using threads. I am trying to make a game in Android. I want to launch a game when

limitcounter>limitframes 

is it possible, if it is please tell me a way to solve the issue