Android Open Source - dClock Clock Service

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License

The source code is released under:

Copyright (c) 2012 Yaroslav Tatarenko All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are me...

Java Source Code

package com.dclock;
/*from   w  ww  .  ja v  a2  s  . c o m*/
import android.app.IntentService;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.preference.PreferenceManager;
import android.util.Log;

import java.util.Calendar;
import java.util.concurrent.atomic.AtomicBoolean;

public class ClockService extends IntentService implements SharedPreferences.OnSharedPreferenceChangeListener
{
    private static final String ServiceTag = "dClockService";
    private Calendar prevTime;
    private Thread clockThread;
    private AtomicBoolean started = new AtomicBoolean(false);

    public ClockService(String name) {
        super(name);
    }

    public ClockService() {
        super(ServiceTag);
    }

    @Override
    public IBinder onBind(Intent intent)
    {
        return null;
    }

    @Override
    protected void onHandleIntent(Intent intent)
    {
        Log.d(ServiceTag, "onHandleIntent start");
        String action = null;
        if (intent != null)
        {
            action = intent.getAction();
        }

        if (action != null && !action.isEmpty())
        {
            Log.d(ServiceTag, String.format("Intent action is \'%1s\'", action));
            if (action.equalsIgnoreCase(ClockWidget.ClockStart) && !started.getAndSet(true))
            {
                SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                preferences.registerOnSharedPreferenceChangeListener(this);

                Log.d(ServiceTag, "runTimer");
                runTimer();
            }
            else
            {
                if (intent.getAction().equalsIgnoreCase(ClockWidget.ClockStop))
                {
                    Log.d(ServiceTag, "stopSelf");
                    cleanup();
                    stopSelf();
                }
            }
        }

        Log.d(ServiceTag, "onHandleIntent end");
    }

   @Override
   public void onDestroy()
   {
        Log.d(ServiceTag, "onDestroy start");
        cleanup();

        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
        preferences.unregisterOnSharedPreferenceChangeListener(this);
        super.onDestroy();
        Log.d(ServiceTag, "onDestroy end");
   }

   public void cleanup()
   {
       started.set(false);
       try
       {
           if (clockThread != null)
           {
               clockThread.join();
               clockThread = null;
           }
       }
       catch (InterruptedException e)
       {
           Log.e(ServiceTag, "Waiting thread interrupted", e);
       }
   }

    public void updateTime()
    {
        Calendar now = Calendar.getInstance();

        if (now.get(Calendar.YEAR) != prevTime.get(Calendar.YEAR) ||
            now.get(Calendar.MONTH) != prevTime.get(Calendar.MONTH) ||
            now.get(Calendar.DAY_OF_MONTH) != prevTime.get(Calendar.DAY_OF_MONTH) ||
            now.get(Calendar.HOUR_OF_DAY) != prevTime.get(Calendar.HOUR_OF_DAY) ||
            now.get(Calendar.MINUTE) != prevTime.get(Calendar.MINUTE))
        {
            SendUpdateIntent();
        }

        prevTime = now;
    }

    private void SendUpdateIntent()
    {
        Intent intent = new Intent(this.getApplicationContext(), ClockWidget.class);
        intent.setAction(ClockWidget.ACTION_REDRAW);
        sendBroadcast(intent);
    }

    private void runTimer()
    {
        clockThread = new Thread(new Runnable()
        {
            @Override
            public void run()
            {
                prevTime = Calendar.getInstance();
                prevTime.set(1900, 1, 1, 0, 0);
                while(started.get())
                {
                    updateTime();
                    try
                    {
                        Thread.sleep(1000);
                    }
                    catch (InterruptedException e)
                    {
                        Log.e(ServiceTag, "Interrupted", e);
                    }
                }
            }
        });

        clockThread.run();
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s)
    {
        Log.d(ServiceTag, "SendUpdateIntent");
        SendUpdateIntent();
    }
}

Java Source Code List

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