smdk4412: add AdvancedDisplay

This partially reverts commit 006c95d4f0c75b9bdf3827856dc694d973464520,
we want to reuse some of it

Change-Id: I84dd929e4cd895d4c4d0d6a81d476eaa1bcc4a0b

7 files changed, 619 insertions, 0 deletions

diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/DisplaySettings.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/DisplaySettings.java
new file mode 100644
index 0000000..d838c31
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/DisplaySettings.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.app.ActionBar;
+import android.app.ActionBar.Tab;
+import android.app.Activity;
+import android.app.Fragment;
+import android.app.FragmentTransaction;
+import android.content.Context;
+import android.os.Bundle;
+import android.support.v4.app.FragmentActivity;
+import android.support.v13.app.FragmentPagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.view.MenuItem;
+
+import com.cyanogenmod.settings.device.R;
+
+import java.util.ArrayList;
+
+public class DisplaySettings extends FragmentActivity {
+
+    public static final String SHARED_PREFERENCES_BASENAME = "com.cyanogenmod.settings.device";
+    public static final String ACTION_UPDATE_PREFERENCES = "com.cyanogenmod.settings.device.UPDATE";
+    public static final String KEY_CABC = "cabc";
+    public static final String KEY_MDNIE_SCENARIO = "mdnie_scenario";
+    public static final String KEY_MDNIE_MODE = "mdnie_mode";
+    public static final String KEY_MDNIE_NEGATIVE = "mdnie_negative";
+    public static final String KEY_LED_FADE = "led_fade";
+    public static final String KEY_TOUCHKEY_LIGHT = "touchkey_light";
+    public static final String KEY_TOUCHKEY_TIMEOUT = "touchkey_timeout";
+    public static final String KEY_HSPA = "hspa";
+    public static final String KEY_USE_DOCK_AUDIO = "dock_audio";
+    public static final String KEY_CATEGORY_SPEN = "category_spen";
+    public static final String KEY_SPEN_POWER_SAVING_MODE = "spen_power_saving";
+
+    ViewPager mViewPager;
+    TabsAdapter mTabsAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mViewPager = new ViewPager(this);
+        mViewPager.setId(R.id.viewPager);
+        setContentView(mViewPager);
+
+        final ActionBar bar = getActionBar();
+        bar.setTitle(R.string.app_name);
+        bar.setDisplayHomeAsUpEnabled(true);
+
+        mTabsAdapter = new TabsAdapter(this, mViewPager);
+        mTabsAdapter.addTab(bar.newTab().setText(R.string.category_screen_title),
+                ScreenFragmentActivity.class, null);
+
+        if (savedInstanceState != null) {
+            bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
+        }
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putInt("tab", getActionBar().getSelectedNavigationIndex());
+    }
+
+    public static class TabsAdapter extends FragmentPagerAdapter
+            implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
+        private final Context mContext;
+        private final ActionBar mActionBar;
+        private final ViewPager mViewPager;
+        private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
+
+        static final class TabInfo {
+            private final Class<?> clss;
+            private final Bundle args;
+
+            TabInfo(Class<?> _class, Bundle _args) {
+                clss = _class;
+                args = _args;
+            }
+        }
+
+        public TabsAdapter(Activity activity, ViewPager pager) {
+            super(activity.getFragmentManager());
+            mContext = activity;
+            mActionBar = activity.getActionBar();
+            mViewPager = pager;
+            mViewPager.setAdapter(this);
+            mViewPager.setOnPageChangeListener(this);
+        }
+
+        public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
+            TabInfo info = new TabInfo(clss, args);
+            tab.setTag(info);
+            tab.setTabListener(this);
+            mTabs.add(info);
+            mActionBar.addTab(tab);
+            notifyDataSetChanged();
+        }
+
+        @Override
+        public int getCount() {
+            return mTabs.size();
+        }
+
+        @Override
+        public Fragment getItem(int position) {
+            TabInfo info = mTabs.get(position);
+            return Fragment.instantiate(mContext, info.clss.getName(), info.args);
+        }
+
+        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+        }
+
+        public void onPageSelected(int position) {
+            mActionBar.setSelectedNavigationItem(position);
+        }
+
+        public void onPageScrollStateChanged(int state) {
+        }
+
+        public void onTabSelected(Tab tab, FragmentTransaction ft) {
+            Object tag = tab.getTag();
+            for (int i=0; i<mTabs.size(); i++) {
+                if (mTabs.get(i) == tag) {
+                    mViewPager.setCurrentItem(i);
+                }
+            }
+        }
+
+        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
+        }
+
+        public void onTabReselected(Tab tab, FragmentTransaction ft) {
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case android.R.id.home:
+            DisplaySettings.this.onBackPressed();
+        default:
+            return super.onOptionsItemSelected(item);
+        }
+    }
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/ScreenFragmentActivity.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/ScreenFragmentActivity.java
new file mode 100644
index 0000000..7b64a4f
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/ScreenFragmentActivity.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.CheckBoxPreference;
+import android.preference.ListPreference;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceCategory;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceManager;
+import android.preference.PreferenceScreen;
+import android.util.Log;
+
+import com.cyanogenmod.settings.device.R;
+
+public class ScreenFragmentActivity extends PreferenceFragment {
+
+    private static final String PREF_ENABLED = "1";
+    private static final String TAG = "DisplaySettings_Screen";
+    private mDNIeScenario mmDNIeScenario;
+    private mDNIeMode mmDNIeMode;
+    private mDNIeNegative mmDNIeNegative;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        addPreferencesFromResource(R.xml.screen_preferences);
+        PreferenceScreen preferenceScreen = getPreferenceScreen();
+        Resources res = getResources();
+
+        /* mDNIe */
+        mmDNIeScenario = (mDNIeScenario) findPreference(DisplaySettings.KEY_MDNIE_SCENARIO);
+        mmDNIeScenario.setEnabled(mDNIeScenario.isSupported(res.getString(R.string.mdnie_scenario_sysfs_file)));
+
+        mmDNIeMode = (mDNIeMode) findPreference(DisplaySettings.KEY_MDNIE_MODE);
+        mmDNIeMode.setEnabled(mDNIeMode.isSupported(res.getString(R.string.mdnie_mode_sysfs_file)));
+
+        mmDNIeNegative = (mDNIeNegative) findPreference(DisplaySettings.KEY_MDNIE_NEGATIVE);
+        mmDNIeNegative.setEnabled(mDNIeNegative.isSupported(res.getString(R.string.mdnie_negative_sysfs_file)));
+
+    }
+
+    @Override
+    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
+
+        String key = preference.getKey();
+        Log.w(TAG, "key: " + key);
+
+        return true;
+    }
+
+    public static boolean isSupported(String FILE) {
+        return Utils.fileExists(FILE);
+    }
+
+    public static void restore(Context context) {
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+    }
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/Startup.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/Startup.java
new file mode 100644
index 0000000..2bada88
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/Startup.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class Startup extends BroadcastReceiver {
+
+    @Override
+    public void onReceive(final Context context, final Intent bootintent) {
+        mDNIeScenario.restore(context);
+        mDNIeMode.restore(context);
+        mDNIeNegative.restore(context);
+        ScreenFragmentActivity.restore(context);
+    }
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/Utils.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/Utils.java
new file mode 100644
index 0000000..4ca2e9e
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/Utils.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.util.Log;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.SyncFailedException;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Context;
+
+public class Utils {
+
+    private static final String TAG = "DeviceSettings_Utils";
+    private static final String TAG_READ = "DeviceSettings_Utils_Read";
+    private static final String TAG_WRITE = "DeviceSettings_Utils_Write";
+
+    // Read value from sysfs interface
+    public static String readOneLine(String sFile) {
+        BufferedReader brBuffer;
+        String sLine = null;
+
+        try {
+            brBuffer = new BufferedReader(new FileReader(sFile), 512);
+            try {
+                sLine = brBuffer.readLine();
+            } finally {
+                Log.w(TAG_READ, "file " + sFile + ": " + sLine);
+                brBuffer.close();
+            }
+        } catch (Exception e) {
+            Log.e(TAG_READ, "IO Exception when reading /sys/ file", e);
+        }
+        return sLine;
+    }
+
+    /**
+     * Write a string value to the specified file.
+     * 
+     * @param filename The filename
+     * @param value The value
+     */
+    public static void writeValue(String filename, String value) {
+        FileOutputStream fos = null;
+        try {
+            fos = new FileOutputStream(new File(filename), false);
+            fos.write(value.getBytes());
+            fos.flush();
+            // fos.getFD().sync();
+        } catch (FileNotFoundException ex) {
+            Log.w(TAG, "file " + filename + " not found: " + ex);
+        } catch (SyncFailedException ex) {
+            Log.w(TAG, "file " + filename + " sync failed: " + ex);
+        } catch (IOException ex) {
+            Log.w(TAG, "IOException trying to sync " + filename + ": " + ex);
+        } catch (RuntimeException ex) {
+            Log.w(TAG, "exception while syncing file: ", ex);
+        } finally {
+            if (fos != null) {
+                try {
+                    Log.w(TAG_WRITE, "file " + filename + ": " + value);
+                    fos.close();
+                } catch (IOException ex) {
+                    Log.w(TAG, "IOException while closing synced file: ", ex);
+                } catch (RuntimeException ex) {
+                    Log.w(TAG, "exception while closing file: ", ex);
+                }
+            }
+        }
+
+    }
+
+    /**
+     * Write a string value to the specified file.
+     * 
+     * @param filename The filename
+     * @param value The value
+     */
+    public static void writeValue(String filename, Boolean value) {
+        FileOutputStream fos = null;
+        String sEnvia;
+        try {
+            fos = new FileOutputStream(new File(filename), false);
+            if (value)
+                sEnvia = "1";
+            else
+                sEnvia = "0";
+            fos.write(sEnvia.getBytes());
+            fos.flush();
+            // fos.getFD().sync();
+        } catch (FileNotFoundException ex) {
+            Log.w(TAG, "file " + filename + " not found: " + ex);
+        } catch (SyncFailedException ex) {
+            Log.w(TAG, "file " + filename + " sync failed: " + ex);
+        } catch (IOException ex) {
+            Log.w(TAG, "IOException trying to sync " + filename + ": " + ex);
+        } catch (RuntimeException ex) {
+            Log.w(TAG, "exception while syncing file: ", ex);
+        } finally {
+            if (fos != null) {
+                try {
+                    Log.w(TAG_WRITE, "file " + filename + ": " + value);
+                    fos.close();
+                } catch (IOException ex) {
+                    Log.w(TAG, "IOException while closing synced file: ", ex);
+                } catch (RuntimeException ex) {
+                    Log.w(TAG, "exception while closing file: ", ex);
+                }
+            }
+        }
+    }
+
+    /**
+     * Write the "color value" to the specified file. The value is scaled from
+     * an integer to an unsigned integer by multiplying by 2.
+     * @param filename      The filename
+     * @param value         The value of max value Integer.MAX
+     */
+    public static void writeColor(String filename, int value) {
+        writeValue(filename, String.valueOf((long) value * 2));
+    }
+
+    /**
+     * Check if the specified file exists.
+     * @param filename      The filename
+     * @return              Whether the file exists or not
+     */
+    public static boolean fileExists(String filename) {
+        return new File(filename).exists();
+    }
+
+    public static void showDialog(Context ctx, String title, String message) {
+        final AlertDialog alertDialog = new AlertDialog.Builder(ctx).create();
+        alertDialog.setTitle(title);
+        alertDialog.setMessage(message);
+        alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
+           public void onClick(DialogInterface dialog, int which) {
+              alertDialog.dismiss();
+           }
+        });
+        alertDialog.show();
+    }
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeMode.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeMode.java
new file mode 100644
index 0000000..c777d72
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeMode.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.content.Context;
+
+import android.content.SharedPreferences;
+import android.util.AttributeSet;
+import android.preference.Preference;
+import android.preference.ListPreference;
+import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.PreferenceManager;
+
+public class mDNIeMode extends ListPreference implements OnPreferenceChangeListener {
+
+    private static String FILE = null;
+
+    public mDNIeMode(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        this.setOnPreferenceChangeListener(this);
+        FILE = context.getResources().getString(R.string.mdnie_mode_sysfs_file);
+    }
+
+    public static boolean isSupported(String filePath) {
+        return Utils.fileExists(filePath);
+    }
+
+    /**
+     * Restore mdnie user mode setting from SharedPreferences. (Write to kernel.)
+     * @param context       The context to read the SharedPreferences from
+     */
+    public static void restore(Context context) {
+        FILE = context.getResources().getString(R.string.mdnie_mode_sysfs_file);
+        if (!isSupported(FILE)) {
+            return;
+        }
+
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        Utils.writeValue(FILE, sharedPrefs.getString(DisplaySettings.KEY_MDNIE_MODE, "0"));
+    }
+
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        Utils.writeValue(FILE, (String) newValue);
+        return true;
+    }
+
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeNegative.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeNegative.java
new file mode 100644
index 0000000..bde9946
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeNegative.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import java.io.IOException;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.content.SharedPreferences;
+import android.preference.Preference;
+import android.preference.ListPreference;
+import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.PreferenceManager;
+
+public class mDNIeNegative extends ListPreference implements OnPreferenceChangeListener {
+
+    private static String FILE = null;
+
+    public mDNIeNegative(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        this.setOnPreferenceChangeListener(this);
+        FILE = context.getResources().getString(R.string.mdnie_negative_sysfs_file);
+    }
+
+    public static boolean isSupported(String filePath) {
+        return Utils.fileExists(filePath);
+    }
+
+    /**
+     * Restore mdnie user mode setting from SharedPreferences. (Write to kernel.)
+     * @param context       The context to read the SharedPreferences from
+     */
+    public static void restore(Context context) {
+        FILE = context.getResources().getString(R.string.mdnie_negative_sysfs_file);
+        if (!isSupported(FILE)) {
+            return;
+        }
+
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        Utils.writeValue(FILE, sharedPrefs.getString(DisplaySettings.KEY_MDNIE_NEGATIVE, "0"));
+    }
+
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        Utils.writeValue(FILE, (String) newValue);
+        return true;
+    }
+
+}
diff --git a/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeScenario.java b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeScenario.java
new file mode 100644
index 0000000..cbab69d
--- /dev/null
+++ b/AdvancedDisplay/src/com/cyanogenmod/settings/device/mDNIeScenario.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2012 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cyanogenmod.settings.device;
+
+import android.content.Context;
+
+import android.content.SharedPreferences;
+import android.util.AttributeSet;
+import android.preference.Preference;
+import android.preference.ListPreference;
+import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.PreferenceManager;
+
+public class mDNIeScenario extends ListPreference implements OnPreferenceChangeListener {
+
+    private static String FILE = null;
+
+    public mDNIeScenario(Context context, AttributeSet attrs) {
+        super(context,attrs);
+        this.setOnPreferenceChangeListener(this);
+        FILE = context.getResources().getString(R.string.mdnie_scenario_sysfs_file);
+    }
+
+    public static boolean isSupported(String filePath) {
+        return Utils.fileExists(filePath);
+    }
+
+    /**
+     * Restore mdnie "camera" setting from SharedPreferences. (Write to kernel.)
+     * @param context       The context to read the SharedPreferences from
+     */
+    public static void restore(Context context) {
+        FILE = context.getResources().getString(R.string.mdnie_scenario_sysfs_file);
+        if (!isSupported(FILE)) {
+            return;
+        }
+
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        Utils.writeValue(FILE, sharedPrefs.getString(DisplaySettings.KEY_MDNIE_SCENARIO, "0"));
+    }
+
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        Utils.writeValue(FILE, (String) newValue);
+        return true;
+    }
+
+}