deepak - Mon Dec 19 2011 13:41:49 GMT-0500 (EST)

Creating a timer countdown for Android?

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deepak - Mon Dec 19 2011 13:42:34 GMT-0500 (EST)

CountDownTimer SDK reference

deepak - Mon Dec 19 2011 13:43:11 GMT-0500 (EST)

Sample code


new CountDownTimer(30000, 1000) {

     public void onTick(long millisUntilFinished) {
         mTextField.setText("seconds remaining: " 
+ millisUntilFinished / 1000);
     }

     public void onFinish() {
         mTextField.setText("done!");
     }
  }.start();

deepak - Mon Dec 19 2011 13:44:12 GMT-0500 (EST)

Another Sample code


package com.android.countdown;
import android.app.Activity;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.widget.TextView;
public class CountDownTest extends Activity {
TextView tv; //textview to display the countdown
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
tv = new TextView(this);
this.setContentView(tv);
//5000 is the starting number (in milliseconds)
//1000 is the number to count down each time (in milliseconds)
MyCount counter = new MyCount(5000,1000);
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);
}
@Override
public void onFinish() {
tv.setText(?done!?);
}
@Override
public void onTick(long millisUntilFinished) {
tv.setText(?Left: ? + millisUntilFinished/1000);
}
}
}

deepak - Mon Dec 19 2011 13:48:23 GMT-0500 (EST)

Above one displays only in Seconds? I want the timer to be displayed in Minutes:Seconds

deepak - Mon Dec 19 2011 13:53:55 GMT-0500 (EST)

Well its easy, when you set the text to the TextView, format the Time in any fashion you want


//Below code will format the time in Minutes:Seconds format
public String formatTime(long millis) {  
        String output = "00:00";  
        long seconds = millis / 1000;  
        long minutes = seconds / 60;  

        seconds = seconds % 60;  
        minutes = minutes % 60;  

        String sec = String.valueOf(seconds);  
        String min = String.valueOf(minutes);  

        if (seconds < 10)  
            sec = "0" + seconds;  
        if (minutes < 10)  
            min= "0" + minutes;  

        output = min + " : " + sec;  
        return output;
    }

deepak - Mon Dec 19 2011 14:25:39 GMT-0500 (EST)

How to do a Count up Timer?

deepak - Mon Jan 16 2012 22:45:10 GMT-0500 (EST)

Here is how you do a Count up timer