sockets - Android bluetooth connection cannot be established on the first try -
i'm trying connect bluetooth device in android application have problem. seems i'm never able connect bluetooth device on first try.
i have following code in bluetoothconnectthread:
public class bluetoothconnectthread extends thread { private bluetoothsocket mmsocket; private bluetoothdevice mmdevice; private context context; private bluetoothmanager manager; public bluetoothconnectthread(bluetoothdevice mmdevice, uuid uuid, context context, bluetoothmanager manager) { this.context = context; this.manager = manager; this.mmdevice = mmdevice; this.uuid = uuid; } public void run() { try { system.out.println("try connect"); mmsocket = (bluetoothsocket) mmdevice.getclass().getmethod("createrfcommsocket", new class[]{int.class}).invoke(mmdevice, integer.valueof(1)); mmsocket.connect(); } catch (exception connectexception) { connectexception.printstacktrace(); try { mmsocket.close(); system.out.println("couldn't establish bluetooth connection! (1)"); } catch (ioexception closeexception) { closeexception.printstacktrace(); system.out.println("couldn't establish bluetooth connection! (2)"); } try { system.out.println("try connect again"); mmsocket = (bluetoothsocket) mmdevice.getclass().getmethod("createrfcommsocket", new class[]{int.class}).invoke(mmdevice, integer.valueof(1)); mmsocket.connect(); } catch (exception connectexception2) { connectexception.printstacktrace(); try { mmsocket.close(); system.out.println("couldn't establish bluetooth connection! (3)"); } catch (ioexception closeexception) { closeexception.printstacktrace(); system.out.println("couldn't establish bluetooth connection! (4)"); } } } if(mmsocket.isconnected()) { if(mmsocket.isconnected()) { system.out.println("connected"); //do connected socket i receive following log when calling run method:
07-12 14:17:10.906 9941-10518/com.example.niekdewit.test i/system.out: try connect 07-12 14:17:10.910 9941-10518/com.example.niekdewit.test w/bluetoothadapter: getbluetoothservice() called no bluetoothmanagercallback 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/system.err: java.io.ioexception: read failed, socket might closed or timeout, read ret: -1 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.readall(bluetoothsocket.java:573) 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.waitsocketsignal(bluetoothsocket.java:550) 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.connect(bluetoothsocket.java:325) 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/system.err: @ com.example.niekdewit.test.bluetoothconnectthread.run(bluetoothconnectthread.java:33) 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test i/system.out: couldn't establish bluetooth connection! (1) 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test i/system.out: try connect again 07-12 14:17:13.025 9941-10518/com.example.niekdewit.test w/bluetoothadapter: getbluetoothservice() called no bluetoothmanagercallback 07-12 14:17:13.147 9941-9941/com.example.niekdewit.test i/timeline: timeline: activity_idle id: android.os.binderproxy@2e01eda7 time:762005544 07-12 14:17:16.503 9941-9941/com.example.niekdewit.test i/timeline: timeline: activity_idle id: android.os.binderproxy@2e01eda7 time:762008901 07-12 14:17:17.279 9941-10518/com.example.niekdewit.test i/system.out: connected i tried replacing 2 lines
mmsocket = (bluetoothsocket) mmdevice.getclass().getmethod("createrfcommsocket", new class[]{int.class}).invoke(mmdevice, integer.valueof(1)); with
mmsocket = mmdevice.createrfcommsockettoservicerecord(uuid); but doesn't work either, generates different log though. using method i'm not able connect on second try.
07-12 14:27:15.968 15135-15622/com.example.niekdewit.test i/system.out: try connect 07-12 14:27:15.969 15135-15622/com.example.niekdewit.test w/bluetoothadapter: getbluetoothservice() called no bluetoothmanagercallback 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test w/system.err: java.io.ioexception: read failed, socket might closed or timeout, read ret: -1 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.readall(bluetoothsocket.java:573) 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.waitsocketsignal(bluetoothsocket.java:550) 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.connect(bluetoothsocket.java:325) 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test w/system.err: @ com.example.niekdewit.test.bluetoothconnectthread.run(bluetoothconnectthread.java:36) 07-12 14:27:18.205 15135-15622/com.example.niekdewit.test i/system.out: couldn't establish bluetooth connection! (1) 07-12 14:27:18.206 15135-15622/com.example.niekdewit.test i/system.out: try connect again 07-12 14:27:18.206 15135-15622/com.example.niekdewit.test w/bluetoothadapter: getbluetoothservice() called no bluetoothmanagercallback 07-12 14:27:18.319 15135-15135/com.example.niekdewit.test i/timeline: timeline: activity_idle id: android.os.binderproxy@2e01eda7 time:762610717 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test w/system.err: java.io.ioexception: read failed, socket might closed or timeout, read ret: -1 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.readall(bluetoothsocket.java:573) 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.waitsocketsignal(bluetoothsocket.java:550) 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test w/system.err: @ android.bluetooth.bluetoothsocket.connect(bluetoothsocket.java:325) 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test w/system.err: @ com.example.niekdewit.test.bluetoothconnectthread.run(bluetoothconnectthread.java:36) 07-12 14:27:20.669 15135-15622/com.example.niekdewit.test i/system.out: couldn't establish bluetooth connection! (3) 07-12 14:27:20.854 15135-15135/com.example.niekdewit.test i/timeline: timeline: activity_idle id: android.os.binderproxy@2e01eda7 time:762613252 when first try connect line
mmsocket = mmdevice.createrfcommsockettoservicerecord(uuid); and try on second try ("try connect again") line
mmsocket = (bluetoothsocket) mmdevice.getclass().getmethod("createrfcommsocket", new class[]{int.class}).invoke(mmdevice, integer.valueof(1)); then generates same log first log attached
i have no idea going on? hope 1 of can see wrong code, or point me in right direction.
edit: when device paired possible connect on first try using both methods.
edit2:
mmsocket = mmdevice.createinsecurerfcommsockettoservicerecord(uuid); also not work
i try change
mmsocket = (bluetoothsocket) mmdevice.getclass().getmethod("createrfcommsocket", new class[]{int.class}).invoke(mmdevice, integer.valueof(1)); to
// bluetoothdevice device= bluetoothadapter.getdefaultadapter().getremotedevice("00:1c:4d:02:a6:55"); // have device capture method invoke socket method m = device.getclass().getmethod("createrfcommsocket", new class[] { int.class }); socket = (bluetoothsocket)m.invoke(device, integer.valueof(1)); socket.connect(); // cool stuff this how connect devices
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