Here is the link where i have discussed about a countdown timer of format(mm:ss) in Java:
Java console code for StopWatch/Timer?
Now i want to display (and update) it in a textview in android. Any clue?
asked Aug 18, 2010 at 9:00
Muhammad Maqsoodur Rehman
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4 Answers
To count down
You'll use a TextField and update its content using CountDownTimer, or check Rahul's answer in this same question.
To count up
In your Activity
import android.widget.Chronometer;
...
private Chronometer crono;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.screen_crono);
this.crono = (Chronometer) findViewById(R.id.calling_crono);
startCrono();
}
public void startCrono() {
crono.setBase(SystemClock.elapsedRealtime());
crono.start();
}
To stop it
crono.stop();
In the XML Layout screen_crono
<Chronometer
android:id="@+id/calling_crono"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:textStyle="bold"
android:textSize="14sp"/>
To set it inside a TextView, I don't think that's possible. Place it to its right or to its left, depending on what you want.
If this is not what you wanted, I hope it helps someone else.
1 Comment
Maragues
yes, this'll count up, my mistake, but it looks like Maxood didn't mind :) I've updated the answer.
You can also use the CountDownTimer class available in android.
Just declare a constructor and start the timer with
timer test=new timer(30000,1000);
onTick will get fired once in every 1000ms in the above case. You can update your TextView from here
class timer extends CountDownTimer
{
public timer(long millisInFuture, long countDownInterval)
{
super(millisInFuture, countDownInterval);
// TODO Auto-generated constructor stub
}
@Override
public void onFinish()
{
}
@Override
public void onTick(long millisUntilFinished)
{
// TODO Auto-generated method stub
// Update your textview on on tick
}
}
Comments
Use the method of a timed UI update in this article it really works great
http://developer.android.com/resources/articles/timed-ui-updates.html
Also, you might use the built in android time class to display your text, it will make your formatting much easier imo
http://developer.android.com/reference/android/text/format/Time.html
answered Aug 18, 2010 at 18:37
Nathan Schwermann
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Comments
try this code.....
tv = new TextView(this);
this.setContentView(tv);
//10000 is the starting number (in milliseconds)
//1000 is the number to count down each time (in milliseconds)
MyCount counter = new MyCount(10000,1000);
counter.start();
}
//countdowntimer is an abstract class, so extend it and fill in methods
public class MyCount extends CountDownTimer
{
public MyCount(long millisInFuture, long countDownInterval)
{
super(millisInFuture, countDownInterval);
}
public void onFinish()
{
tv.setText("Time Up!");
}
public void onTick(long millisUntilFinished)
{
tv.setText("Time Left : " + millisUntilFinished/1000);
}
