I have developed an application as a service that handles basic HTTP requests. When the phone receives a HTTP Post request like: http ://IP:port/gps/on, it should register to the GPS listener like the following:
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,200,0,locationListener);
But, as this code is present inside the handler, I am getting the below error:
8.614: E/AndroidRuntime(21211): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
06-18 12:34:58.614: E/AndroidRuntime(21211): at android.os.Handler.<init>(Handler.java:121)
06-18 12:34:58.614: E/AndroidRuntime(21211): at android.location.LocationManager$ListenerTransport$1.<init>(LocationManager.java:183)
06-18 12:34:58.614: E/AndroidRuntime(21211): at android.location.LocationManager$ListenerTransport.<init>(LocationManager.java:183)
06-18 12:34:58.614: E/AndroidRuntime(21211): at android.location.LocationManager._requestLocationUpdates(LocationManager.java:661)
06-18 12:34:58.614: E/AndroidRuntime(21211): at android.location.LocationManager.requestLocationUpdates(LocationManager.java:486)
06-18 12:34:58.614: E/AndroidRuntime(21211): at com.example.devicecommunication.ConnectService$HttpFileHandler.registerGPS(ConnectService.java:4281)
06-18 12:34:58.614: E/AndroidRuntime(21211): at com.example.devicecommunication.ConnectService$HttpFileHandler.handle(ConnectService.java:700)
06-18 12:34:58.614: E/AndroidRuntime(21211): at org.apache.http.protocol.HttpService.doService(HttpService.java:243)
06-18 12:34:58.614: E/AndroidRuntime(21211): at org.apache.http.protocol.HttpService.handleRequest(HttpService.java:187)
06-18 12:34:58.614: E/AndroidRuntime(21211): at com.example.devicecommunication.ConnectService$WorkerThread.run(ConnectService.java:4987)
Can you please let me know if I have to use handler/ Looper for this? And any example of how to do this. Thanks in advance!
Code to register GPS is called by a class that handles HTTP requests:
public String registerGPS(){
String gps= "";
if(!gpsSensor){
if(isGpsOn(appContext))
{
Log.d("GPS on","Using GPS Provider here");
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER,200,0,locationListener);
gps = "***********GPS Provider registered here *********************";
}
else
{
Log.d("GPS off","using NETWORK Provider here");
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,200,0,locationListener);
gps = "***********Network provider registered here *********************";
}
}
gpsSensor = true;
return gps;
}
In my Handler for Post, I passed an extra String to my service and started the service again. In onStartCommand(), I get the extra from the intent and then call requestLocationUpdates(), so it is done on the main thread. This solved my requirement. Thanks everyone for the help!