Code example for Queue

Methods: peekpoll

     * Queue 
     * @return A appWidgetId need to be update next. 
    private static int getNextUpdate() { 
        if (sAppWidgetIds.peek() == null) {
            return AppWidgetManager.INVALID_APPWIDGET_ID;
        } else { 
            return sAppWidgetIds.poll();
     * The main function used to get and parse the weather data from the Google 
     * website. And store the data in weatherData. 
     * @param city The city need to get the weather data. 
    public void search(String city) {
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