Main Activity for Action time tick example

MainActivity.java

package com.cc.demo.digiClock;

import java.util.Calendar;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.TextView;
public class DigiClockActivity extends Activity {

private static BroadcastReceiver tickReceiver;
private TextView hourText;
private TextView minuteText;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  hourText=(TextView)findViewById(R.id.hourText);
  minuteText=(TextView)findViewById(R.id.minuteText);
  
  //Set the current time at startup
  hourText.setText(String.valueOf(Calendar.getInstance().get(Calendar.HOUR_OF_DAY)));
  minuteText.setText(String.valueOf(Calendar.getInstance().get(Calendar.MINUTE)));
  
  //Create a broadcast receiver to handle change in time
  tickReceiver=new BroadcastReceiver(){
    @Override
    public void onReceive(Context context, Intent intent) {
    if(intent.getAction().compareTo(Intent.ACTION_TIME_TICK)==0)
    {
      hourText.setText(String.valueOf(Calendar.getInstance().get(Calendar.HOUR_OF_DAY)));
      minuteText.setText(String.valueOf(Calendar.getInstance().get(Calendar.MINUTE)));
    }
    
    }
  };
  
  //Register the broadcast receiver to receive TIME_TICK
  registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

}

@Override
public void onStop()
{
  super.onStop();
  //unregister broadcast receiver.
  if(tickReceiver!=null)
  unregisterReceiver(tickReceiver);
}

}