Update TextView Every Second

Question

I've looked around and nothing seems to be working from what I've tried so far...

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.deskclock);

    TextView tvTime = (TextView) findViewById(R.id.tvTime);
    TextView tvDate = (TextView) findViewById(R.id.tvDate);

    java.util.Date noteTS = Calendar.getInstance().getTime();

    String time = "hh:mm"; // 12:00
    tvTime.setText(DateFormat.format(time, noteTS));

    String date = "dd MMMMM yyyy"; // 01 January 2013
    tvDate.setText(DateFormat.format(date, noteTS));

I basically want the setText methods to update or refresh every second or so, so my clock actually works like it should do. I've seen methods like handlers and run and nothing worked so any help with this would be great thanks. :)

Answer 1

Add following code in your onCreate() method:

Thread thread = new Thread() {

  @Override
  public void run() {
    try {
      while (!thread.isInterrupted()) {
        Thread.sleep(1000);
        runOnUiThread(new Runnable() {
          @Override
          public void run() {
            // update TextView here!
          }
        });
      }
    } catch (InterruptedException e) {
    }
  }
};

thread.start();

This code starts an thread which sleeps 1000 milliseconds every round.

Answer 2

It would be better if you just used an AsyncTask running using a Timer something like this

 Timer LAIATT = new Timer();
    TimerTask LAIATTT = new TimerTask()
    {
        @Override
        public void run()
        {
            LoadAccountInformationAsyncTask LAIAT = new LoadAccountInformationAsyncTask();
            LAIAT.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
        }
    };
    LAIATT.schedule(LAIATTT, 0, 1000);

Answer 3

Use TextSwitcher (for nice text transition animation) and timer instead.

Answer 4

Extending @endian 's answer, you could use a thread and call a method to update the TextView. Below is some code I made up on the spot.

java.util.Date noteTS;
String time, date;
TextView tvTime, tvDate;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.deskclock);

    tvTime = (TextView) findViewById(R.id.tvTime);
    tvDate = (TextView) findViewById(R.id.tvDate);

    Thread t = new Thread() {

        @Override
        public void run() {
            try {
                while (!isInterrupted()) {
                    Thread.sleep(1000);
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            updateTextView();
                        }
                    });
                }
            } catch (InterruptedException e) {
            }
        }
    };

    t.start();
}

private void updateTextView() {
    noteTS = Calendar.getInstance().getTime();

    String time = "hh:mm"; // 12:00
    tvTime.setText(DateFormat.format(time, noteTS));

    String date = "dd MMMMM yyyy"; // 01 January 2013
    tvDate.setText(DateFormat.format(date, noteTS));
}

Answer 5

It's a very old question and I'm sure there are a lot of resources out there. But it's never too much to spread the word to be at the safe side. Currently, if someone else ever want to achieve what the OP asked, you can use: android.widget.TextClock.

TextClock documentation here.

Here's what I've used:

<android.widget.TextClock
    android:id="@+id/digitalClock"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:timeZone="GMT+0000" <!--Greenwich -->
    android:format24Hour="dd MMM yyyy   k:mm:ss"
    android:format12Hour="@null"
    android:textStyle="bold"
    android:layout_alignParentEnd="true" />

Answer 6

This Code work for me..

//Get Time and Date
private String getTimeMethod(String formate)
{
    Date date = new Date();
    SimpleDateFormat dateFormat = new SimpleDateFormat(formate);
    String formattedDate= dateFormat.format(date);
    return formattedDate;
}

//this method is used to refresh Time every Second
private void refreshTime() //Call this method to refresh time
{
    new Timer().schedule(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    txtV_Time.setText(getTimeMethod("hh:mm:ss a")); //hours,Min and Second with am/pm
                    txtV_Date.setText(getTimeMethod("dd-MMM-yy")); //You have to pass your DateFormate in getTimeMethod()          
                };
            });
        }
    }, 0, 1000);//1000 is a Refreshing Time (1second)
}