Method call not working in service class android - methods

Question

hi here is my code i want to call the insert(latitude,longitude) inside the get() but it is not working for me so please help!
public void onStart(Intent intent, int startid){
Toast.makeText(getApplicationContext(),"Service Strated...",Toast.LENGTH_SHORT).show();
device_id = intent.getExtras().getString("device_id");
final int delay = 60000; //milliseconds
h.postDelayed(new Runnable() {
public void run() {
try {
get();
} catch (JSONException e) {
e.printStackTrace();
}
h.postDelayed(this, delay);
}
}, delay);
}
public void get() throws JSONException {
count++;
gps=new GPSTracker(getApplicationContext());
if(gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
if (latitude != 0.0 & longitude != 0.0) {
insert(latitude,longitude);
Toast.makeText(getApplicationContext(), "Your Location : \n Lat :" + latitude + "\nLang :" + longitude, Toast.LENGTH_LONG).show();
if(count==5){
send();
count=0;
}
}
}
}
public void insert(double lat,double lon){
System.out.print("hi_entered");
boolean exist = checkIfExist(lat, lon);
System.out.print(exist);
if(!exist) {
System.out.print("INSERT INTO location VALUES(null,'" + lat + "','" + lon + "',null);");
db.execSQL("INSERT INTO location VALUES(null,'" + lat + "','" + lon + "',null);");
}
}