alert dialoge disappears in android after next page call

1public void OnClickNearMe(View view) {
2    LocationManager locManager = (LocationManager) getSystemService(LOCATION_SERVICE);
3    if (!locManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){   
4        createGpsDisabledAlert();   
5    } else {
6        getLocation();
7    }
8}
9
10private void getLocation() {
11    Location locationResult = null;
12    MyLocation myLocation = new MyLocation();
13    boolean locationEnabled = myLocation.getLocation(this, locationResult);
14
15    if (locationEnabled == true) {
16        locationResult = myLocation.getLocationResult();
17        showResultsScreen(locationResult);
18    } else {
19        Toast.makeText(this, R.string.noLoc, Toast.LENGTH_LONG).show();
20    }
21}
22
23private void createGpsDisabledAlert(){   
24    AlertDialog.Builder builder = new AlertDialog.Builder(this);   
25    builder.setMessage("Your GPS is disabled! Would you like to enable it?")   
26         .setCancelable(false)   
27        .setPositiveButton("Enable GPS",   
28             new DialogInterface.OnClickListener(){   
29              public void onClick(DialogInterface dialog, int id){
30                   showGpsOptions(); 
31                   getLocation();
32              }   
33         });   
34         builder.setNegativeButton("Do nothing",   
35              new DialogInterface.OnClickListener(){   
36              public void onClick(DialogInterface dialog, int id){   
37                   dialog.cancel(); 
38              }   
39         });   
40    AlertDialog alert = builder.create();
41    alert.show();
42    }  
43
44    private void showGpsOptions(){   
45            Intent gpsOptionsIntent = new Intent(   
46                    android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);   
47           startActivity(gpsOptionsIntent);   
48    }  
49
50    private void showResultsScreen(Location locationResult){
51         Intent resultsIntent = new Intent(this, ResultScreenList.class); 
52           startActivity(resultsIntent);
53    }
54}