create method findViewById'int in android'

Hi everyone while declearning Button and setContentView inside method, I am开发者_StackOverflow社区 get "create method findViewById ('int')" message , as a newbie in Android.. I tried to sort it through different method but cnt fix . Here is my code:

                                public class DisplayVideo {
static int getWidth;

public static void startVideo() {
    final Button startButton = (Button) findViewById(R.id.start_btn);
    startButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            getWidth = Main.width;
            if (getWidth > 1000) {
                setContentView(R.layout.lesson_large);
            } else {
                setContentView(R.layout.lesson);
            }
            // @@@ FOR INTRO AV @@@//
            VideoView videoView = (VideoView) findViewById(R.id.videoView1);
            MediaController mediaControler = new MediaController(null);
            mediaControler.setAnchorView(videoView);
            Uri introVideo = Uri.parse(statics.urlAv + "AV264.MP4");
            videoView.setMediaController(mediaControler);
            videoView.setVideoURI(introVideo);
            videoView.start();

            // menu();
            // exit();

            // @@@ FOR LESSON/SUBLESSSON AV @@@//
            videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

                        public void onCompletion(MediaPlayer mp) {
                            VideoView videoView = (VideoView) findViewById(R.id.videoView1);
                            MediaController mediaControler = new MediaController(
                                    null);
                            mediaControler.setAnchorView(videoView);
                            Uri video = Uri.parse(statics.urlAv
                                    + "AV264.MP4");
                            videoView.setMediaController(mediaControler);
                            videoView.setVideoURI(video);
                            videoView.start();

                            // menu();
                            // exit();
                        }
                    });

        }

    });
}

}

Any help will really be appreciated. Thanks

you cant get the resource of Button without setContentView(), without set the ContentView application not able to know of which xml(layout) this Button refers to? or you can create a dynamic button and layout for doing the above operation