java - How do I close any previous Bluetooth sockets after my app starts? -


in app, open , close bluetooth socket on same device each session , listen data. when close one, make sure close input , output streams , socket in cancel method. still, people app keeps trying read device. know because read logs run() in listening thread, there flag listening that's set false in cancel, , listening thread end when socket closed due ioexception, never happens, socket must still opened. see logs of attempted reads every second of every day though person isn't using app. might because app crashes , cancel method isn't called. either way can't guarantee cancel method called. how close bluetooth sockets opened when start app, if these opened in new threads created independently?

this guy had same problem didn't see solution: android bluetooth connection doesn't close after application crash

the accepted answer no because:

  1. the current users haven't had uncaughtexceptionhandler run code yet , need have previous connections closed when new version released

  2. the uncaughtexceptionhandler must have reference sockets, doesn't have. want able close bluetooth sockets when app starts.

  3. the guy made question asked how information socket store when app starts , want close them, , got no response.

edit:

how open socket (removed logging code):

        try {             tmp.connect();;         } catch (ioexception e) {             isconnected = false;                 try {                     tmp = (bluetoothsocket) device.getclass().getmethod("createrfcommsocket",                             new class[] {int.class}).invoke(device, 1);                 } catch (exception e2) {                     e2.printstacktrace();                 }                 try {                     tmp.connect();                     setconnected();                 } catch (ioexception e1) {                     e1.printstacktrace();                     isconnected = false;                     cancel();                 }

how close socket:

    public void cancel() {          isconnected = false;         listening = false;         try {             if (manageconnection.mminstream != null) {                 manageconnection.mminstream.close();                 manageconnection.mminstream = null;             }         } catch (ioexception e) {             e.printstacktrace();         }          try {             if (manageconnection.mmoutstream != null) {                 manageconnection.mmoutstream.close();                 manageconnection.mmoutstream = null;             }         } catch (ioexception e) {             e.printstacktrace();         }          try {             mmsocket.close();             mmsocket = null;             manageconnection = null;         } catch (ioexception e) {               // logging code         }     } }

listening:

        while (listening == true) {             try {                  synchronized (listeningactivity.lock) {                     buffer = new byte[mminstream.available()];                      mminstream.read(buffer); ....              } catch (ioexception e) {                 // code calls cancel()


Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more