android - iBeacon Ranging Service Not Returning any Beacons -

-

i working ibeacon technology, , trying create rangingservice search nearby ibeacons every 5 seconds , run in background of application. code below not working. i'm sure i'm making dumb mistake somewhere, can see in log files checkpoint 3 , 4 being reached every 5 seconds, while checkpoints 1 , 2 never being reached. thus, nearby beacons not being detected. don't have experience services or beacons, appreciate help, @davidgyoung.

please forgive me if code below isn't indented :) can me.

import android.app.service; import android.content.intent; import android.os.handler; import android.os.ibinder; import android.os.message; import android.os.remoteexception; import android.util.log; import android.widget.edittext; import android.widget.toast;  import org.altbeacon.beacon.beacon; import org.altbeacon.beacon.beaconconsumer; import org.altbeacon.beacon.beaconmanager; import org.altbeacon.beacon.rangenotifier; import org.altbeacon.beacon.region;  import java.util.collection;  public class rangingservice extends service implements beaconconsumer { private beaconmanager beaconmanager = beaconmanager.getinstanceforapplication(this); handler handler; string b = "";  @override     public ibinder onbind(intent arg0) {         return null;     }  @override public void onstart(intent intent, int startid) {     // let continue running until stopped.     log.d("service", "started");      handler = new handler(){          @override             public void handlemessage(message msg) {                 // todo auto-generated method stub                 super.handlemessage(msg);                 log.d("checkpoint", "5 seconds have passed");             }          };          new thread(new runnable(){             public void run() {                 // todo auto-generated method stub                 while(true)                 {                     try {                         startjob();                         log.d("checkpoint", "job has started");                         thread.sleep(5000);                         handler.sendemptymessage(0);                      } catch (interruptedexception e) {                         // todo auto-generated catch block                         e.printstacktrace();                     }                  }              }         }).start();             //return start_sticky;     }  public void startjob() {     beaconmanager.bind(this);     log.d("the first beacon", "starting job realzies");     onbeaconserviceconnect(); }       @override     public void ondestroy() {         super.ondestroy();         log.d("service", "ended");     }  @override public void onbeaconserviceconnect() {     log.d("checkpoint3", "checkpoint3");     beaconmanager.setrangenotifier(new rangenotifier() {         @override         public void didrangebeaconsinregion(collection<beacon> beacons, region region) {             log.d("checkpoint1", "checkpoint1");             if (beacons.size() > 0) {                 log.d("checkpoint2", "checkpoint2");                 //edittext edittext = (edittext)rangingactivity.this.findviewbyid(r.id.rangingtext);                 beacon firstbeacon = beacons.iterator().next();                 string = "the first beacon " + firstbeacon.tostring() + " " + firstbeacon.getdistance() + " meters away. rssi = " + firstbeacon.getrssi();                 log.d("service", a);                 //logtodisplay(a);             }         }      });      try {         beaconmanager.startrangingbeaconsinregion(new region("myranginguniqueid", null, null, null));         log.d("checkpoint4", "checkpoint4");      } catch (remoteexception e) {   }  } }// update code formatting

main activity:

public void didenterregion(region arg0) {     // in example, class sends notification user whenever   beacon     // matching region (defined above) first seen.     log.d(tag, "did enter region.");     startservice(new intent(this, rangingservice.class));  }

a few tips:

  1. don't call onbeaconserviceconnect(); manually. callback method gets called android beacon library when beacon scanning service ready go result of call beaconmanager.bind(this); if call yourself, defeat purpose, , cause problems.

  2. you should not call beaconmanager.bind(this); every 5 seconds -- call once when service starts up. calling repeatedly cause problems.

  3. make sure android beacon library configured types of beacons using. default detect open source altbeacon packets. if using proprietary beacon type, need create beaconparser , add configure library. can google search "beaconparser" , proprietary beacon type proper line of code configure library.


Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more

erlang - Saving a digraph to mnesia is hindered because of its side-effects -

-
updated the digraph library in erlang implements data type side-effectful. each operation on data type saves new state in ets table -- instead of returning altered version of itself, more common in functional languages. the problem usage perspective, impedes effort store or pass around state in convenient way requiring me first "collect" state before can start juggle around. the closest solution have seen far serializer/deserializer , these have drawback tied current structure of digraphs instead of operating on abstract type -- prevents future proof solution. update pascal pointed out serializer utilizes interface of digraph, , hence eliminates drawback mentioned above. better, albeit still inconvenient, see no better alternative. what recommendation on how store digraphs? should go different data type altogether? thanks. i not sure understand concern. fact digraph stored in ets transparent in user interface, might want chnge either exchange digr...
Read more