package exam.timezone1;

import java.util.Calendar;
import java.util.TimeZone;

import android.app.Activity;
import android.util.Log;
 
public class timezone1 extends Activity {
   
 private static final String TAG = "InputActivity";

 /** Called when the activity is first created. */
    public String getTimeZoneTime(){
      String time;
      String timezone = null;
  Log.d(TAG,"TIMEZONE"+timezone);
      Calendar cal=Calendar. getInstance();
      cal.setTimeZone(TimeZone.getTimeZone(timezone));
         time=""+cal.get(Calendar.HOUR_OF_DAY)+":"+cal.get(Calendar.MINUTE);
      Log.d(TAG,"TIME"+cal.get(Calendar.HOUR_OF_DAY));
      Log.d(TAG,"TIME"+cal.get(Calendar.MINUTE));
      Log.d(TAG,time);

       
      return time;

    }

}

여기에서 결과화면이 검은색화면으로 나오는데

어느부분이 잘못됫는지 모르겠어서요

알려주셨으면 합니다.