android - The specified message queue synchronization barrier token has not been posted -


i have app binded service. sending messages service, getting following error:

e/androidruntime(28216): java.lang.illegalstateexception: specified message queue synchronization barrier token has not been posted or has been removed.

sometimes error instead:

android.util.androidruntimeexception: { what=888 when=0 } message in use.

sometimes ui freezes. communicating service activity , visa versa through handlers. 

 public void init(ibinder service){     playerservice = new messenger(service);     setbound(true);     try {         message msg = message.obtain(null, playerservice.msg_register_client);         msg.replyto = messenger;         playerservice.send(msg);         while(!messagequeue.isempty()){             playerservice.send(messagequeue.remove());         }     } catch (remoteexception e) {         // in case service has crashed before         log.d(player.tag, "problem binding player messenger " + e.getmessage());     } }

here method consistenly results on freezes, second time called.

public void play(string url) {     message msg = message.obtain(null, playerservice.play, 0, 0);     msg.setdata(geturlbundle(url));     sendmessage(msg); }  private void sendmessage(message message){     if(!isbound){         log.d(player.tag, "isnt bound, queueing message");         messagequeue.add(message);     }else {         try {             playerservice.send(message);         } catch (remoteexception e) {             e.printstacktrace();         }     } }

i'm new threading, messengers , handlers, appreciated, :)

problem queue messages, allocated message.obtain(). need create copy of message calling 

message m = new message(); m.copyfrom(message);

and add copied message m queue.


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