Question

I have two questions, I took the below code from a tutorial website in the process of trying to learn and find out how to set a countdown timer. But when I started the up in the emulator it crashed before starting and android force closed it.
So here are my two questions:

1-What, or where is the line that caused the error?
2-I put break point on the onCreate method, and switched to the debugger view, and here I couldn’t know how to use the debugger view in Eclipse. Where to look for the faulty error, and why the Eclipse debugger doesn’t highlight the line it is stopping on?

I would love to get answer for the 2nd question more than the first. Obviously 🙂

Thanks to anyone for helping, or trying to help.

public class MytestActivity extends Activity {
       /** Called when the activity is first created. */
         TextView tv; //textview to display the countdown
         //final TextView tv = (TextView) findViewById(R.id.editText1);

         @Override
         public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);

                //final TextView tv = (TextView) findViewById(R.id.editText1);

                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();
         }; //end of onCreate class

         //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);

                }

         } //end of MyCount class

} //End of activity class

Answer 1

Log Cat is a much better solution for debugging then the standard debugging techniques. Learning to use it correctly is a big step for a fledgling Android programmer. Here is a handy video that will hopefully get you started: http://www.youtube.com/watch?v=wPaUxCrp6qI