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POBluetoothChat ConnectedThread crash
 

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  1. POBluetoothChat ConnectedThread crash
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    <p>I'm getting this problem while executing a modified BluetoothChat app. The app shows the devices, starts connecting to it, and then crashes. I've been testing this and it happens on this thread.</p> <p>Here is the code and the LogCat:</p> <pre><code>public class ConnectedThread extends Thread { // Debugging private static final String TAG = "BluetoothChatService"; private static final boolean D = true; public ConnectedThread(BluetoothSocket socket) { Log.d(TAG, "create ConnectedThread"); GlobalVar.mmSocket = socket; InputStream tmpIn = null; OutputStream tmpOut = null; /**Get the input and output streams, using temp objects because member streams are final*/ try { tmpIn = socket.getInputStream(); tmpOut = socket.getOutputStream(); } catch (IOException e) {Log.e(TAG, "temp sockets not created", e); } GlobalVar.mmInStream = tmpIn; GlobalVar.mmOutStream = tmpOut; } @Override public void run() { Log.i(TAG, "BEGIN mConnectedThread"); byte[] buffer = new byte[1024]; // buffer store for the stream int bytes; // bytes returned from read() /**Keep listening to the InputStream until an exception occurs*/ while (true) { try { if (D) Log.d(TAG, "starting"); /**Read from the InputStream*/ bytes = GlobalVar.mmInStream.read(buffer); /**Send the obtained bytes to the UI activity*/ GlobalVar.mHandler.obtainMessage(GlobalVar.MESSAGE_READ, bytes, -1, buffer).sendToTarget(); } catch (IOException e) { Log.e(TAG, "disconnected", e); GlobalVar.mTransmission.connectionLost(); /**Start the service over to restart listening mode*/ if (D) Log.d(TAG, "arrives"); ConnectedThread.this.start(); //This could be wrong! break; } } } /** * Write to the connected OutStream. * @param buffer The bytes to write */ public void write(byte[] buffer) { try { GlobalVar.mmOutStream.write(buffer); /**Share the sent message back to the UI Activity*/ GlobalVar.mHandler.obtainMessage(GlobalVar.MESSAGE_WRITE, -1, -1, buffer).sendToTarget(); } catch (IOException e) {} } /**Call this from the main activity to shutdown the connection*/ public void cancel() { try { GlobalVar.mmSocket.close(); } catch (IOException e) { } } </code></pre> <p>}</p> <p>/This is the LogCat where it can be seen that it enters in the While and then crashes.</p> <pre><code>07-23 12:22:55.560: D/AbsListView(27386): unregisterIRListener() is called 07-23 12:22:55.590: D/BluetoothUtils(27386): isSocketAllowedBySecurityPolicy start : device null 07-23 12:22:55.590: W/BluetoothAdapter(27386): getBluetoothService() called with no BluetoothManagerCallback 07-23 12:22:55.600: E/SpannableStringBuilder(27386): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length 07-23 12:22:55.600: E/SpannableStringBuilder(27386): SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length 07-23 12:22:55.620: D/AbsListView(27386): onDetachedFromWindow 07-23 12:22:55.620: D/AbsListView(27386): unregisterIRListener() is called 07-23 12:22:55.620: D/AbsListView(27386): onDetachedFromWindow 07-23 12:22:55.620: D/AbsListView(27386): unregisterIRListener() is called 07-23 12:22:57.032: D/BluetoothChatService(27386): create ConnectedThread 07-23 12:22:57.052: D/AndroidRuntime(27386): Shutting down VM 07-23 12:22:57.052: I/BluetoothChatService(27386): BEGIN mConnectedThread 07-23 12:22:57.052: D/BluetoothChatService(27386): starting 07-23 12:22:57.052: W/dalvikvm(27386): threadid=1: thread exiting with uncaught exception (group=0x41d58ac8) 07-23 12:22:57.052: E/AndroidRuntime(27386): FATAL EXCEPTION: main 07-23 12:22:57.052: E/AndroidRuntime(27386): java.lang.NullPointerException 07-23 12:22:57.052: E/AndroidRuntime(27386): at com.example.btaplication.BTActivity$1.handleMessage(BTActivity.java:289) 07-23 12:22:57.052: E/AndroidRuntime(27386): at android.os.Handler.dispatchMessage(Handler.java:99) 07-23 12:22:57.052: E/AndroidRuntime(27386): at android.os.Looper.loop(Looper.java:137) 07-23 12:22:57.052: E/AndroidRuntime(27386): at android.app.ActivityThread.main(ActivityThread.java:5328) 07-23 12:22:57.052: E/AndroidRuntime(27386): at java.lang.reflect.Method.invokeNative(Native Method) 07-23 12:22:57.052: E/AndroidRuntime(27386): at java.lang.reflect.Method.invoke(Method.java:511) 07-23 12:22:57.052: E/AndroidRuntime(27386): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 07-23 12:22:57.052: E/AndroidRuntime(27386): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 07-23 12:22:57.052: E/AndroidRuntime(27386): at dalvik.system.NativeStart.main(Native Method) 07-23 12:28:07.475: I/Process(27386): Sending signal. PID: 27386 SIG: 9 </code></pre>
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