use thread inside buttonclick in android - multithreading

Question

I am receiving temperature values from a sensor through BLE and storing it in my db and passing the values as an array through intent to graph activity and diplaying a line graph. I am also posting the values to google app engine. i am doing this all within runOnUiThread() and hence my app crashes when there are too many values.Is it possible to pass values into the graph activity on a new thread? or any other better suggestions?
#Override
public void propertyChange(final PropertyChangeEvent event) {
final String property = event.getPropertyName();
runOnUiThread(new Runnable() {
public void run() {
try {
if (property.equals(PROPERTY_IR_TEMPERATURE)) {
double newIRValue = (Double) event.getNewValue();
// float newIRValue_1 = (Float) event.getNewValue();
TextView textView = (TextView) findViewById(R.id.ir_temperature);
String value = decimal.format(newIRValue);
String formattedText = value + DEGREE_SYM;
float value_chk = (float)(newIRValue);
String formattedText_1 = String.valueOf(value_chk);
String sensorid = test_1;
String sensortype = "temperature";
// write_data(sensorid,sensortype,value);
// Toast.makeText(getBaseContext(), "ARV sensid:"+sensorid+" senstype:"+sensortype, Toast.LENGTH_SHORT).show();
long timemilli = System.currentTimeMillis();
//Log.d("TIMMEE", String.valueOf(timemilli));
String time=String.valueOf(timemilli);
db = new DBHandler(getApplicationContext());
//db.deleteTempReadings();
// inserting data to temp table
Log.i("insert", "Inserting Records...");
);
Temperature(sensorid,formattedText_1));
//Toast.makeText(getBaseContext(), "SENSOR_ID:"+t.getSensorId()+"TEMPERATURE: "+t.getTemperature()+"TIME: "+t.getTimestamp(), Toast.LENGTH_LONG).show();
// reading data from db
Log.i("Reading", "Reading Records...");
List<Temperature> temp = db.getAllTempReadings();
int arraySize=temp.size();
double tempArray[]=new double[arraySize];
int timeArray[]=new int [arraySize];
//Log.d("ans", String.valueOf(temp.size()));
for (Temperature t : temp) {
String log="SENSOR ID: "+t.getSensorId()+"TEMPERATURE: "+t.getTemperature()+"TIME: "+t.getTimestamp();
Log.d("Record"+t, log);
}
// Reading values into the array!
for(int i=0;i<arraySize;i++){
tempArray[i]=Double.parseDouble(temp.get(i).getTemperature());
}
Button btn=(Button)findViewBy Id(R.id.btnGraph);
btn.setOnCLickListener(new View.onClickListener(){
public void onClick(View v){
Intent iIntent =new Intent(getApplicationContext(),GraphActivity.class);
tIntent.putExtra("tempArray",tempArray);
startActivity(tIntent);
}
});
// rest....posting to server code......
textView.setText(formattedText);
}
}
}
}
}

Answer 1

The temperature value you get from the sensor upto this you have to do stuff in one thread and after that you have to start three thread one for the inserting into the DB, the other one for the displaying the line graph and the last and the third one for the posting the data into the google app engine.

Answer 2

I think you are a bit confused here. The idea is to keep slow processing OUT of your UI thread. I suggest you do the writes to the DB and the App engine first in the 'current' (presumably less critical) thread and then when all is done simply update the graph display in the UI thread.
The only reason you need RunOnUiThread is to make changes to the views on the screen.