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- @Override
- protected void onHandleIntent(Intent intent) {
- device = (BluetoothDevice) intent.getExtras().get("device");
- if (device != null) {
- Log.v("DeviceManager", "Beginning attempts to communicate to: " + device.getName());
- try {
- BluetoothSocket socket = device.createRfcommSocketToServiceRecord(device.getUuids()[0].getUuid());
- outputStream = socket.getOutputStream();
- inputStream = socket.getInputStream();
- while (Utils.appIsInForeground && device != null) {
- if (outputStream == null){
- Log.e("DeviceManager", "Looks like the outputStream is null...");
- if (inputStream == null){
- Log.e("DeviceManager", "And input stream is null, are you even connected to the device?");
- }else{
- Log.e("DeviceManager", "Although strangely, input stream has been set.");
- }
- }else{
- String myString = "This is a string!";
- byte[] myByteArray = myString.getBytes("UTF-8");
- //Crashes here:
- outputStream.write(myByteArray);
- }
- Thread.sleep(1000);
- }
- } catch (IOException e) {
- e.printStackTrace();
- Log.e("DeviceManager", "Can't create a socket to the bluetooth device.");
- } catch (InterruptedException e) {
- e.printStackTrace();
- Log.e("DeviceManager", "The sleep thread was interrupted.");
- } catch (NullPointerException e) {
- e.printStackTrace();
- Log.e("DeviceManager", "A null pointer exception, this is probably not good.");
- }
- }else {
- Log.e("DeviceManager", "The Device Manager has been passed a null object instead of a device.");
- }
- }
- 03-23 15:55:12.134 3042-3171/com.name.app W/System.err: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.OutputStream.write(byte[], int, int)' on a null object reference
- 03-23 15:55:12.135 3042-3171/com.name.app W/System.err: at android.bluetooth.BluetoothSocket.write(BluetoothSocket.java:553)
- 03-23 15:55:12.136 3042-3171/com.name.app W/System.err: at android.bluetooth.BluetoothOutputStream.write(BluetoothOutputStream.java:85)
- 03-23 15:55:12.136 3042-3171/com.name.app W/System.err: at java.io.OutputStream.write(OutputStream.java:75)
- 03-23 15:55:12.137 3042-3171/com.name.app W/System.err: at com.name.app.service.DeviceManager.onHandleIntent(DeviceManager.java:73)
- 03-23 15:55:12.138 3042-3171/com.name.app W/System.err: at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:67)
- 03-23 15:55:12.138 3042-3171/com.name.app W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
- 03-23 15:55:12.139 3042-3171/com.name.app W/System.err: at android.os.Looper.loop(Looper.java:154)
- 03-23 15:55:12.139 3042-3171/com.name.app W/System.err: at android.os.HandlerThread.run(HandlerThread.java:61)
- myByteArray = {byte[17]@4799}
- this = {DeviceManager@4698}
- intent = {Intent@4705} "Intent { cmp=com.name.app/.service.DeviceManager (has extras) }"
- socket = {BluetoothSocket@4706}
- myString = "This is a string!"
- myByteArray = {byte[17]@4799}
- outputStream = {BluetoothOutputStream@4743}
- outputStream.write(myByteArray, 0, myByteArray.length);
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