// Memory thresholds preset and Swap listener
        OnPreferenceChangeListener prefChangeListener = new OnPreferenceChangeListener() {
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                if (preference.equals(Presets)) {
                    // Set memory thresholds
                    final String val = newValue.toString();
                    int index = Presets.findIndexOfValue(val);
                    switch (index) {
                    case 0:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("17");
                        Mem5.setText("18");
                        Mem6.setText("19");
                        break;
                    case 1:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("20");
                        Mem5.setText("22");
                        Mem6.setText("24");
                        break;
                    case 2:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("25");
                        Mem5.setText("30");
                        Mem6.setText("35");
                        break;
                    case 3:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("25");
                        Mem5.setText("30");
                        Mem6.setText("35");
                        break;
                    case 4:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("22");
                        Mem5.setText("24");
                        Mem6.setText("30");
                        break;
                    case 5:
                        Mem1.setText("6");
                        Mem2.setText("8");
                        Mem3.setText("16");
                        Mem4.setText("36");
                        Mem5.setText("40");
                        Mem6.setText("40");
                        break;
                    }
                }
                else if (preference.equals(Swap)) {
                    // Check Swappartition
                    if (Swap.isChecked()) {
                        if (new File("/dev/block/mmcblk1p2").exists() == false) {
                            Toast.makeText(getBaseContext(), R.string.swapwarning, Toast.LENGTH_LONG).show();
                            Swap.setChecked(false);
                        }
                    }
                }
                return true;
            }
        };
        Presets.setOnPreferenceChangeListener(prefChangeListener);
        Swap.setOnPreferenceChangeListener(prefChangeListener);