Question

当我运行程序时，系统当前时间显示在textview中。现在我有一个按钮，一个edittext和一个textview。我想当我在编辑文本上放40时，我按当前小时秒计算，然后通过在文本视图上按下按钮来显示它。当我从edittext获取它时，我只想计算当前小时秒。如您所知，当前小时秒数由一个数字计算，它也会影响分钟和小时

请帮助我此代码显示当前时间：

    Thread myThread = null;
    Runnable runnable = new CountDownRunner();
    myThread= new Thread(runnable);   
    myThread.start();
}
public void doWork() {
    runOnUiThread(new Runnable() {
        public void run() {
            try{    
               txtCurrentTime= (TextView)findViewById(R.id.lbltime);
                    Date dt = new Date();
                    int hours = dt.getHours();
                    int minutes = dt.getMinutes();
                    int seconds = dt.getSeconds();
                    String curTime = hours + ":" + minutes + ":" + seconds;
                    txtCurrentTime.setText(curTime);

Answer 1

当前时间：

                txtCurrentTime= (TextView)findViewById(R.id.txtcurrunt);
                Date dt = new Date();
                int hours = dt.getHours();
                int minutes = dt.getMinutes();
                int seconds = dt.getSeconds();
                String curTime = hours + ":" + minutes + ":" + seconds;
                txtCurrentTime.setText(curTime);

用户输入：

                userInput=(EditText)findViewById(R.id.userInputInSeconds);
                String userInput=userInput.getText().toString();
                long increment=Long.parseLong(userInput);
//New Time
              Date dt = new Date();
              long newTime =dt.getTime()+(increment)/1000;
              Date newData=new Date(newTime);
              int hours = newData.getHours();
              int minutes = newData.getMinutes();
              int seconds = newData.getSeconds();
              String newTimeString = hours + ":" + minutes + ":" + seconds;

              txtNewTime= (TextView)findViewById(R.id.txtNew);
              txtNewTime.setText(newTimeString);

我希望它会帮助你...... :)

Answer 2

使用日历。您可以更轻松地将秒数添加到当前时间。

int seconds=Integer.parseInt(mTextView.getText()); // get textview's value (in integer)

Calendar cal=Calendar.getInstance();

int hours = cal.get(Calendar.HOUR_OF_DAY);
int minutes = cal.get(Calendar.MINUTE);
int seconds = cal.get(Calendar.SECOND);
String currentTimeString = String.format("%1$tH:%1$tM:%1$tS",cal);//24-hour format : HH:MM:SS

cal.add(Calendar.SECOND,seconds);
String newTimeString = String.format("%1$tH:%1$tM:%1$tS",cal);//24-hour format : HH:MM:SS

有关更多日期格式：请访问http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Formatter.html

如何在当前时间添加时间？

2 个答案: