Java tutorial
//package com.java2s; //License from project: Apache License import android.app.AlertDialog; import android.content.Context; import android.location.LocationManager; public class Main { public static void isGPSActivated(final Context context) { LocationManager lm = null; boolean gpsEnabled = false; if (lm == null) lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); try { gpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); } catch (Exception ex) { } if (!gpsEnabled) { AlertDialog.Builder dialog = new AlertDialog.Builder(context); dialog.setCancelable(false); dialog.show(); } } }