Android Open Source - ClinicalTrialTracker Alarm Receiver

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Back to project page ClinicalTrialTracker.

License

The source code is released under:

Apache License

Java Source Code

package com.yuanwei.android;
/*  w  ww  . ja  v a  2s. co m*/
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.support.v4.content.WakefulBroadcastReceiver;

import java.util.Calendar;

import com.redapple.android.R;

/**
 * When the alarm fires, this WakefulBroadcastReceiver receives the broadcast Intent 
 * and then starts the IntentService {@code SampleSchedulingService} to do some work.
 */
public class AlarmReceiver extends WakefulBroadcastReceiver {
    // The app's AlarmManager, which provides access to the system alarm services.
    private AlarmManager alarmMgr;
    // The pending intent that is triggered when the alarm fires.
    private PendingIntent alarmIntent;
  
    @Override
    public void onReceive(Context context, Intent intent) {   
        // BEGIN_INCLUDE(alarm_onreceive)
        /* 
         * If your receiver intent includes extras that need to be passed along to the
         * service, use setComponent() to indicate that the service should handle the
         * receiver's intent. For example:
         * 
         * ComponentName comp = new ComponentName(context.getPackageName(), 
         *      MyService.class.getName());
         *
         * // This intent passed in this call will include the wake lock extra as well as 
         * // the receiver intent contents.
         * startWakefulService(context, (intent.setComponent(comp)));
         * 
         * In this example, we simply create a new intent to deliver to the service.
         * This intent holds an extra identifying the wake lock.
         */
        Intent service = new Intent(context, RssDownloadingSchedulingService.class);
        
        // Start the service, keeping the device awake while it is launching.
        startWakefulService(context, service);
        // END_INCLUDE(alarm_onreceive)
    }

    // BEGIN_INCLUDE(set_alarm)
    /**
     * Sets a repeating alarm that runs once a day at approximately 8:30 a.m. When the
     * alarm fires, the app broadcasts an Intent to this WakefulBroadcastReceiver.
     * @param context
     */
    public void setAlarm(Context context) {
        alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(context, AlarmReceiver.class);
        alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
        SharedPreferences share = context.getSharedPreferences(Constants.SHARED_PREFERENCES, Context.MODE_PRIVATE);
        int mode =share.getInt(Constants.UPDATE_MODE, 0);

        //A fixed timing is not a good idea for server. Changed into fixed time interval. July 11th 2014 @Yuanwei Chen
        /* 

         * 
         * Here are some examples of ELAPSED_REALTIME_WAKEUP:
         * 
         * // Wake up the device to fire a one-time alarm in one minute.
         * alarmMgr.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, 
         *         SystemClock.elapsedRealtime() +
         *         60*1000, alarmIntent);
         *        
         * // Wake up the device to fire the alarm in 30 minutes, and every 30 minutes
         * // after that.
         * alarmMgr.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, 
         *         AlarmManager.INTERVAL_HALF_HOUR, 
         *         AlarmManager.INTERVAL_HALF_HOUR, alarmIntent);
         */
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        // Set the alarm's trigger time to 8:30 a.m.
        calendar.set(Calendar.HOUR_OF_DAY,share.getInt(Constants.UPDATE_HOUR, 8));
        calendar.set(Calendar.MINUTE, share.getInt(Constants.UPDATE_MINUTE, 30));

        switch (mode){
          case R.id.fixed_intervals_one_day:
                alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP,  
                        calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, alarmIntent);
            
            break;
          case R.id.fixed_intervals_two_day:
                alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP,  
                        calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY*2, alarmIntent);
            break;
          case R.id.fixed_intervals_one_week:
                alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP,  
                        calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY*7, alarmIntent);
            break;
          default:
            break;
        }
        
        // Enable {@code SampleBootReceiver} to automatically restart the alarm when the
        // device is rebooted.
        
        ComponentName receiver = new ComponentName(context, BootReceiver.class);
        PackageManager pm = context.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);  
                   
    }
    // END_INCLUDE(set_alarm)

    /**
     * Cancels the alarm.
     * @param context
     */
    // BEGIN_INCLUDE(cancel_alarm)
    public void cancelAlarm(Context context) {
        // If the alarm has been set, cancel it.
        if (alarmMgr!= null) {
            alarmMgr.cancel(alarmIntent);
        }
        
        // Disable {@code SampleBootReceiver} so that it doesn't automatically restart the 
        // alarm when the device is rebooted.
        
        ComponentName receiver = new ComponentName(context, BootReceiver.class);
        PackageManager pm = context.getPackageManager();

        pm.setComponentEnabledSetting(receiver,
                PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                PackageManager.DONT_KILL_APP);
                
    }
    // END_INCLUDE(cancel_alarm)
}

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