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POandroid java.io.IOException: Transport endpoint is not connected
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  1. POandroid java.io.IOException: Transport endpoint is not connected
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    copied!<p>I need to send a string to a bluetooth device. But while sending,I am getting an Exeption <code>java.io.IOException: Transport endpoint is not connected</code> on <code>java.io.OutputStream.write(byte[])</code> method.</p> <p>The Code Is as shown below. The code just search a specific device from the paired device list and send string.</p> <pre><code>public class MainActivity extends Activity { TextView out; private static final int REQUEST_ENABLE_BT = 1; private BluetoothAdapter btAdapter; private ArrayList&lt;BluetoothDevice&gt; btDeviceList = new ArrayList&lt;BluetoothDevice&gt;(); private ArrayAdapter&lt;String&gt; mPairedDevicesArrayAdapter; private ArrayAdapter&lt;String&gt; mNewDevicesArrayAdapter; BluetoothDevice device1; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); out = (TextView) findViewById(R.id.out); btAdapter = BluetoothAdapter.getDefaultAdapter(); ListpairedDevices(); } /* This routine is called when an activity completes. */ @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_ENABLE_BT) { CheckBTState(); } } public void ListpairedDevices() { Set&lt;BluetoothDevice&gt; pairedDevices = btAdapter.getBondedDevices(); // If there are paired devices, add each one to the ArrayAdapter if (pairedDevices.size() &gt; 0) { out.append("\nPaired Devices \n"); for (BluetoothDevice device : pairedDevices) { out.append("\n Device123: " + device.getName() + "," + device); //mPairedDevicesArrayAdapter.add("\n Device123: " + device.getName() + "," + device); String dv=device.toString(); if(dv.contains("00:1B:EE:82:31:1E")) { device1=device; } } } else { out.append("\nNo Pared Device"); } out.append("\nDiscovered Devices"); } public void sendtext(View v) {//button click Set&lt;BluetoothDevice&gt; bd=btAdapter.getBondedDevices(); sendDataToPairedDevice("message1"); } private void sendDataToPairedDevice(String message ){ byte[] toSend = message.getBytes(); try { UUID applicationUUID = UUID.fromString("8ce255c0-200a-11e0-ac64-0800200c9a66"); BluetoothSocket socket = device1.createInsecureRfcommSocketToServiceRecord(applicationUUID); OutputStream mmOutStream = socket.getOutputStream(); mmOutStream.write(toSend); } catch (IOException e) { Log.e( "Exception during write", e.toString()); } } } </code></pre>
 

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