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Android

Posted by Tom Coomer
Tom Coomer
1,331 Points

Endless countdown timer

I would like to create a timer that will continue into minus figures.

new CountDownTimer(1000, 10) {

                 public void onTick(long millisUntilFinished) {
                     timerGame1.setText("" + millisUntilFinished / 10);
                 }

                 public void onFinish() {
                     //timerGame1.setText("done!");
                 }
              }.start();

3 Answers

Jack Hill
Jack Hill
1,168 Points
Jack Hill
Jack Hill
1,168 Points

Did you get your problem solved? Because thats a neat thought and if you would share the code I would like to see it.

Tom Coomer
Tom Coomer
1,331 Points

Not yet. Sorry.

Barrie Freyre
Barrie Freyre
23,301 Points
Barrie Freyre
Barrie Freyre
23,301 Points

This is rustic code but I hope it can help you to get a better solution

Is a simple activity with three buttons which you can select the following:

  • From 20 to 10 ( mBtn20to10 )
  • From 10 to -10 ( mBtn10minus10 )
  • From 20 to 0 ( mBtn20to0 )

The trick to manage a range is using an offset variable, see the code below,

Regards, Barrie

package com.thecatdesign.counterdownexample;

import android.app.Activity; import android.os.Bundle; import android.os.CountDownTimer; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView;

public class MainActivity extends Activity {

protected TextView mCounterDownMessage;
protected Button mBtn20to0;
protected Button mBtn10minus10;
protected Button mBtn20to10;
protected CountDownTimer mCountTimer;

protected long offset;

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

    mCounterDownMessage = (TextView) findViewById(R.id.txtCounterDownMessage);

    mBtn20to0 = (Button) findViewById(R.id.btn20to0);
    mBtn10minus10 = (Button) findViewById(R.id.btn10minus10);
    mBtn20to10 = (Button) findViewById(R.id.btn20to10);

    mBtn20to0.setOnClickListener(new View.OnClickListener() {           
        @Override
        public void onClick(View v) {
            executeTimerDown(20000, 0, 200);                
        }
    });

    mBtn20to10.setOnClickListener(new View.OnClickListener() {          
        @Override
        public void onClick(View v) {
            executeTimerDown(20000, 10000, 200);                
        }
    });

    mBtn10minus10.setOnClickListener(new View.OnClickListener() {           
        @Override
        public void onClick(View v) {
            executeTimerDown(10000, -10000, 200);               
        }
    });     



} // OnCreate

private void executeTimerDown(long millisInFuture, long toMillisInFuture, long countDownInterval ) {
    offset = toMillisInFuture;
    Log.i("check", "offset" + offset);
    Log.i("check", "millisInFuture" + millisInFuture);
    Log.i("check", "toMillisInFuture" + toMillisInFuture);
    if (toMillisInFuture < 0 ) {            
        millisInFuture += Math.abs(toMillisInFuture);
    } 
    else if (toMillisInFuture > 0 ) {
        millisInFuture -= Math.abs(toMillisInFuture);
    }
    Log.i("check", "millisInFuture" + millisInFuture);
    Log.i("check", "toMillisInFuture" + toMillisInFuture);

    mCountTimer = new CountDownTimer(millisInFuture, countDownInterval) {           
        @Override
        public void onTick(long millisUntilFinished) {
            long secondsToShow = millisUntilFinished;
            if (offset > 0)
                secondsToShow += Math.abs(offset);
            else if (offset < 0)
                secondsToShow -= Math.abs(offset);

            Log.i("check", "secondsToShow: " + secondsToShow );
            Log.i("check", "millisUntilFinished: " + millisUntilFinished );

            mCounterDownMessage.setText("seconds remaining: " + secondsToShow / 1000);
        }
        @Override
        public void onFinish() {
            mCounterDownMessage.setText("done!");               
        }
    }.start();              

} // executeTimerDown

} // MainActivity

Tom Coomer
Tom Coomer
1,331 Points

Thanks!

Barrie Freyre
Barrie Freyre
23,301 Points
Barrie Freyre
Barrie Freyre
23,301 Points

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