How to make a smooth serial print? I have a code which make some calculations using sensor values and provide two comma separated values.

float x;// initialization
float y;// initialization
//some calculations here using sensor values
Serial.print(x);Serial.print(",");Serial.print(y);


but the issue is due to some unstable situations of the sensor readings, I don't receive sensor data in same time intervals (overall delay is 1 second). I send these values to my Android device through a Bluetooth connection. At that stage, android device cannot separate two values due to lack of smoothness of the Serial.print(). Is there any way to make it smooth (like saving to a buffer before serial print or something) ?
I bet your problem has nothing to do with “smoothness” (whatever that
means), but is entirely due to lack of message framing. The serial and
bluetooth links do not transmit messages: they transmit only a stream of
bytes, with no built-in notion of where a message ends and the next one
starts. Relying on the timing of the received bytes to tell the messages
apart is very unwise. You should instead use some kind of delimiter for
your messages.

For text-based transmissions like yours, the most natural choice is to
send a line terminator at the end of each message. Typically a CR+LF
pair. The Serial object has the println() methods designed precisely
for this purpose: they send their arguments immediately followed by
CRLF:

Serial.print(x); Serial.print(","); Serial.println(y);


At the receiving end, you have to buffer all the incoming characters
until you see the line termination. Then you know the message is
complete and you can process it.