New Error

Thread [<11> Thread-99] (Suspended (exception ViewRootImpl$CalledFromWrongThreadException))
	<VM does not provide monitor information>
	ViewRootImpl.checkThread() line: 4039
	ViewRootImpl.requestLayout() line: 709
	PhoneWindow$DecorView(View).requestLayout() line: 12675
	LinearLayout(View).requestLayout() line: 12675
	FrameLayout(View).requestLayout() line: 12675
	RelativeLayout(View).requestLayout() line: 12675
	RelativeLayout.requestLayout() line: 268
	TextView(View).requestLayout() line: 12675
	TextView.checkForRelayout() line: 6773
	TextView.setText(CharSequence, TextView$BufferType, boolean, int) line: 3306
	TextView.setText(CharSequence, TextView$BufferType) line: 3162
	TextView.setText(CharSequence) line: 3137
	MainActivity.updateUI(String) line: 69
	MainActivity.access$2(MainActivity, String) line: 67
	MainActivity$1.run() line: 45
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It says "Source not found" in ViewRootImpl.checkThread() line:4039

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code:

Thread getInformation = new Thread() {
        public void run() {
        	Document doc;
			try {
				doc = dereference("my url");
	            String text = extractContent(doc);
	            updateUI(text);
			} catch (IOException e) {
				e.printStackTrace();
			}

        }
    };

    public void ButtonClick(View view) throws IOException {
        getInformation.start();
    }

    private Document dereference(String uri) throws IOException {
        Connection connection = Jsoup.connect(uri);
        return connection.get();
    }

    private String extractContent(Document doc) {
        Elements divs = doc.select("div.onlinestatus");
        return divs.text();
    }

    private void updateUI(String text) {
        TextView tv = (TextView)findViewById(R.id.textView1);
        tv.setText(text);
    }