SystemPermissionWithCode.java

public void checkGPS() {
        locationRequest = LocationRequest.create();
        locationRequest.setInterval(1000);
        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
                .addLocationRequest(locationRequest)
                .setAlwaysShow(true);

        Task<LocationSettingsResponse> locationSettingsResponseTask = LocationServices.getSettingsClient(getApplicationContext())
                .checkLocationSettings(builder.build());

        locationSettingsResponseTask.addOnCompleteListener(new OnCompleteListener<LocationSettingsResponse>() {
            @Override
            public void onComplete(@NonNull Task<LocationSettingsResponse> task) {
                try {
                    LocationSettingsResponse response = task.getResult(ApiException.class);
                    Toast.makeText(MainActivity.this, "GPS is Already Enable", Toast.LENGTH_SHORT).show();

                } catch (ApiException e) {
                    if (e.getStatusCode() == LocationSettingsStatusCodes.RESOLUTION_REQUIRED) {
                        ResolvableApiException resolvableApiException = (ResolvableApiException) e;
                        try {
                            resolvableApiException.startResolutionForResult(MainActivity.this, 101);
                        } catch (IntentSender.SendIntentException sendIntentException) {
                            sendIntentException.printStackTrace();
                        }
                    }

                    if (e.getStatusCode() == LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE) {
                        Toast.makeText(MainActivity.this, "Settings Not Available", Toast.LENGTH_SHORT).show();
                    }
                }
            }
        });
    }