Android Open Source - Geoclock Geofence Receiver

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License

The source code is released under:

GNU General Public License

Java Source Code

package maurizi.geoclock;
/*from  ww  w. j a v a2 s.c  om*/
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;

import com.google.android.gms.location.Geofence;
import com.google.android.gms.location.LocationClient;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.google.gson.Gson;

import org.threeten.bp.LocalDateTime;

import java.util.List;
import java.util.Set;

import static maurizi.geoclock.GeoAlarm.getGeoAlarmForGeofenceFn;

public class GeofenceReceiver extends AbstractGeoAlarmReceiver {
  private static final Gson gson = new Gson();
  private static final String ACTIVE_ALARM_PREFS = "active_alarm_prefs";

  @Override
  public void onConnected(Bundle bundle) {
    final int transition = LocationClient.getGeofenceTransition(this.intent);

    final List<Geofence> affectedGeofences = LocationClient.getTriggeringGeofences(intent);
    final ImmutableSet<GeoAlarm> affectedAlarms = ImmutableSet.copyOf(Lists.transform(affectedGeofences,
                                                                                      getGeoAlarmForGeofenceFn(context)));

    if ((transition == Geofence.GEOFENCE_TRANSITION_ENTER)) {
      ImmutableSet<GeoAlarm> currentAlarms = changeActiveAlarms(affectedAlarms, Sets::union);

      // TODO: cancel already set alarms
      // TODO: Only setup AlarmManager for *next* alarm?
      final AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
      for (GeoAlarm alarm : currentAlarms) {
        final long alarmTime = alarm.getAlarmManagerTime(LocalDateTime.now()).toInstant().toEpochMilli();
        final PendingIntent intent = AlarmManagerReceiver.getPendingIntent(context);

        if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
          manager.setExact(AlarmManager.RTC_WAKEUP, alarmTime, intent);
        } else {
          manager.set(AlarmManager.RTC_WAKEUP, alarmTime, intent);
        }
      }

    } else if (transition == Geofence.GEOFENCE_TRANSITION_EXIT) {
      ImmutableSet<GeoAlarm> currentAlarms = changeActiveAlarms(affectedAlarms, Sets::difference);
      // TODO: Reset by iterating through geofences?? It's unclear
      // TODO: Remove AlarmMAnager alarms for geofences we are leaving
    }
  }

  public static PendingIntent getPendingIntent(Context context) {
    Intent intent = new Intent(context, GeofenceReceiver.class);
    return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
  }

  protected ImmutableSet<GeoAlarm> changeActiveAlarms(ImmutableSet<GeoAlarm> triggerAlarms, SetOp<GeoAlarm> op) {
    final SharedPreferences activeAlarmsPrefs = context.getSharedPreferences(ACTIVE_ALARM_PREFS, Context.MODE_PRIVATE);

    final String savedActiveAlarmsJson = activeAlarmsPrefs.getString(ACTIVE_ALARM_PREFS, gson.toJson(new GeoAlarm[] {}));
    final Set<GeoAlarm> savedAlarms = ImmutableSet.copyOf(gson.fromJson(savedActiveAlarmsJson, GeoAlarm[].class));

    final ImmutableSet<GeoAlarm> currentAlarms = ImmutableSet.copyOf(op.apply(savedAlarms, triggerAlarms));
    activeAlarmsPrefs.edit().putString(ACTIVE_ALARM_PREFS, gson.toJson(currentAlarms.toArray())).apply();
    setNotification(currentAlarms);

    return currentAlarms;
  }
}

Java Source Code List

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