On Aug 30, 2012, at 9:41 PM, balivo <[email protected]> wrote:
> Hi! I need use a Bluetooth Printer (DATECS DPP-250). But, I'm having a
> serious problems...
...
> And don't work. Some helpe?
Can you elaborate on "doesn't work"? Do you get any error messages/exception
stack traces in the Android Debug Log?
http://docs.xamarin.com/android/advanced_topics/android_debug_log
That said, this looks mighty suspicious:
> RunOnUiThread(delegate {
> IAsyncResult xpto = s.OutputStream.BeginWrite(buffer, 0, buffer.Length,
> new AsyncCallback(delegate { }), State.On);
> s.Close();
> });
Won't that possibly result in Close()ing your BluetoothSocket instance before
you finish Write()ing your message? You might want to make that synchronous.
Also, I suspect that you don't need to perform the
BluetoothSocket.OutputStream.Write() call from the UI thread; in general,
Android doesn't like you performing file/network operations from the UI thread:
http://developer.android.com/reference/android/os/NetworkOnMainThreadException.html
http://developer.android.com/guide/practices/responsiveness.html
Thanks,
- Jon
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