从线程开始新活动

Question

I need to call a new activity from a thread class like this:
Intent i = new Intent(getContext(),GameOver.class);
and when i call startActivity(i) it gives me an error saying that the method is undefined for my class.
Can anyone tell me how do resolve this issue?
Thanks!
Here is the full run method of the thread:

/*starts running the thread*/
    @Override
    public void run(){
        while(run){
            Canvas c = null;
            try {
                c = surfaceHolder.lockCanvas(null);
                synchronized (surfaceHolder) {
                    if (mode == STATE_RUNNING){
                        /*if user has no more lives, he lost*/
                        if(Global.lives == 0) lose();
                        doDraw(c);
                    }
                }
            } finally {
                // do this in a finally so that if an exception is thrown
                // during the above, we don't leave the Surface in an
                // inconsistent state
                if (c != null) {
                    /*unlocks the canvas and shows the image drawn by the doDraw method*/
                    surfaceHolder.unlockCanvasAndPost(c);
                }
            }

Where lose(); is the method who's code is on the start( intent ).

Answer 1

First of all, startActivity is a method of Contex, so you will need to pass reference to a valid Context..

Second thing is, that as far as I know, activity can be started only from main (GUI) thread. There is several ways how to do it, one of them is for example something like this:

Handler handler = new Handler(Looper.getMainLooper());

handler.post(new Runnable() {
    @Override
    public void run() {
        Intent intent = new Intent (MyActivity.this, NextActivity.class);
        startActivity(intent);
    }
});