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Android

Posted by Tom Coomer
Tom Coomer
1,331 Points

Android countdown timer error

This is the code given by Google to create a countdown timer.

new CountDownTimer(30000, 1000) {

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

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

However when I place it in "MyActivity.java" I am given an error. I assume I must import "CountDownTimer" but am unsure how. P.s. I am using Android Studio.

1 Answer

cbcbcb
cbcbcb
16,560 Points
cbcbcb
cbcbcb
16,560 Points

Hello @TomCoomer , I went ahead and made a mock up class sort of. Below I gave a suggestion on how to fix your example and then after that I implemented a solution that I would have used had I been using this code in my project.

Try creating an inner class that extends the CountDownTimer class. Also I don't know if this is what did it but you need to override the onFinish and onTick methods. I don't know if you just pasted that code in a class and tried to run it but that was just a snippet but you will need to declare a CountDownTimer variable first and then initialize it with the constructor you used. Like CountDownTimer timer = new CountDownTimer( 30000, 10000 ){ public void onTick( )...........................etc etc }.start( );

Here is how I did it:

//Import the CountDownTimer class
import android.os.CountDownTimer;

MyActivity
{

    protected EditText mTextField;

    //Declare a member variable of my class derived from the CountDownTimer super class
    protected CustomTimer myTimer;

    @Override
    protected void onCreate( Bundle bundle )
    {

        super.onCreate( bundle );
        setContentView( R.layout.my_activity_layout );
        mTextField = ( EditText ) findViewById( R.id.my_activity_layout_text_field );

       //Initialize myTimer with its' overloaded constructor
       myTimer = new CustomTimer( 30000, 1000 );

        myCustomTimer.start( );

    } //end of onCreate method

    //Declare a new inner child class of parent class CountDownTimer
    public class CustomTimer extends CountDownTimer
    {

        //Overloaded constructor
        public CustomTimer(long millisInFuture, long countDownInterval) 
        {

            super( millisInFuture, countDownInterval );

        }

        //override onTick method
        @Override
        public void onTick(long millisUntilFinished) 
        {

            mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);

        }

        //override onFinish method
        @Override
        public void onFinish() 
        {

            mTextField.setText("done!");

        }

    } //end of CustomTimer class

} //end of MyActivity class