Merge branch '#8754_reduce_battery_consumption' into '0.9.8'

#8754 reduce battery consumption

See merge request leap/bitmask_android!54

10 files changed, 461 insertions, 46 deletions

diff --git a/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java b/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java
index a21a9601..f07a2a23 100644
--- a/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java
+++ b/app/src/main/java/se/leap/bitmaskclient/ConfigHelper.java
@@ -16,7 +16,9 @@
  */
 package se.leap.bitmaskclient;
 
+import android.content.Context;
 import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.util.Log;
@@ -56,6 +58,7 @@ import java.util.Map;
 import java.util.Set;
 
 import static android.R.attr.name;
+import static se.leap.bitmaskclient.Constants.DEFAULT_SHARED_PREFS_BATTERY_SAVER;
 import static se.leap.bitmaskclient.Constants.PREFERENCES_APP_VERSION;
 import static se.leap.bitmaskclient.Constants.PROVIDER_CONFIGURED;
 import static se.leap.bitmaskclient.Constants.PROVIDER_EIP_DEFINITION;
@@ -365,6 +368,7 @@ public class ConfigHelper {
         clearDataOfLastProvider(preferences, false);
     }
 
+    @Deprecated
     public static void clearDataOfLastProvider(SharedPreferences preferences, boolean commit) {
         Map<String, ?> allEntries = preferences.getAll();
         List<String> lastProvidersKeys = new ArrayList<>();
@@ -392,18 +396,30 @@ public class ConfigHelper {
     }
 
     public static void deleteProviderDetailsFromPreferences(@NonNull SharedPreferences preferences, String providerDomain) {
-            preferences.edit().
-                    remove(Provider.KEY + "." + providerDomain).
-                    remove(Provider.CA_CERT + "." + providerDomain).
-                    remove(Provider.CA_CERT_FINGERPRINT + "." + providerDomain).
-                    remove(Provider.MAIN_URL + "." + providerDomain).
-                    remove(Provider.KEY + "." + providerDomain).
-                    remove(Provider.CA_CERT + "." + providerDomain).
-                    remove(PROVIDER_EIP_DEFINITION + "." + providerDomain).
-                    remove(PROVIDER_PRIVATE_KEY + "." + providerDomain).
-                    remove(PROVIDER_VPN_CERTIFICATE + "." + providerDomain).
-                    apply();
+        preferences.edit().
+                remove(Provider.KEY + "." + providerDomain).
+                remove(Provider.CA_CERT + "." + providerDomain).
+                remove(Provider.CA_CERT_FINGERPRINT + "." + providerDomain).
+                remove(Provider.MAIN_URL + "." + providerDomain).
+                remove(Provider.KEY + "." + providerDomain).
+                remove(Provider.CA_CERT + "." + providerDomain).
+                remove(PROVIDER_EIP_DEFINITION + "." + providerDomain).
+                remove(PROVIDER_PRIVATE_KEY + "." + providerDomain).
+                remove(PROVIDER_VPN_CERTIFICATE + "." + providerDomain).
+                apply();
     }
 
+    public static void saveBattery(Context context, boolean isEnabled) {
+        if (context == null) {
+            return;
+        }
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        preferences.edit().putBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, isEnabled).apply();
+    }
+
+    public static boolean getSaveBattery(@NonNull Context context) {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+        return preferences.getBoolean(DEFAULT_SHARED_PREFS_BATTERY_SAVER, false);
+    }
 
 }
diff --git a/app/src/main/java/se/leap/bitmaskclient/Constants.java b/app/src/main/java/se/leap/bitmaskclient/Constants.java
index 2b7a8113..58145015 100644
--- a/app/src/main/java/se/leap/bitmaskclient/Constants.java
+++ b/app/src/main/java/se/leap/bitmaskclient/Constants.java
@@ -81,4 +81,9 @@ public interface Constants {
     String BROADCAST_RESULT_CODE = "BROADCAST.RESULT_CODE";
     String BROADCAST_RESULT_KEY = "BROADCAST.RESULT_KEY";
 
+
+    //////////////////////////////////////////////
+    // ICS-OPENVPN CONSTANTS
+    /////////////////////////////////////////////
+    String DEFAULT_SHARED_PREFS_BATTERY_SAVER = "screenoff";
 }
diff --git a/app/src/main/java/se/leap/bitmaskclient/Dashboard.java b/app/src/main/java/se/leap/bitmaskclient/Dashboard.java
deleted file mode 100644
index e69de29b..00000000
--- a/app/src/main/java/se/leap/bitmaskclient/Dashboard.java
+++ /dev/null
diff --git a/app/src/main/java/se/leap/bitmaskclient/DrawerSettingsAdapter.java b/app/src/main/java/se/leap/bitmaskclient/DrawerSettingsAdapter.java
new file mode 100644
index 00000000..867f3d48
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/DrawerSettingsAdapter.java
@@ -0,0 +1,219 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package se.leap.bitmaskclient;
+
+import android.support.annotation.NonNull;
+import android.support.v7.widget.SwitchCompat;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.CompoundButton;
+import android.widget.TextView;
+
+import java.util.ArrayList;
+
+/**
+ * Created by cyberta on 21.02.18.
+ */
+
+public class DrawerSettingsAdapter extends BaseAdapter {
+
+    //item types
+    public static final int NONE = -1;
+    public static final int SWITCH_PROVIDER = 0;
+    public static final int LOG = 1;
+    public static final int ABOUT = 2;
+    public static final int BATTERY_SAVER = 3;
+
+    //view types
+    public final static int VIEW_SIMPLE_TEXT = 0;
+    public final static int VIEW_SWITCH = 1;
+
+    public static class DrawerSettingsItem {
+        private String description = "";
+        private int viewType = VIEW_SIMPLE_TEXT;
+        private boolean isChecked = false;
+        private int itemType = NONE;
+        private CompoundButton.OnCheckedChangeListener callback;
+
+        private DrawerSettingsItem(String description, int viewType, boolean isChecked, int itemType, CompoundButton.OnCheckedChangeListener callback) {
+            this.description = description;
+            this.viewType = viewType;
+            this.isChecked = isChecked;
+            this.itemType = itemType;
+            this.callback = callback;
+        }
+
+        public static DrawerSettingsItem getSimpleTextInstance(String description, int itemType) {
+            return new DrawerSettingsItem(description, VIEW_SIMPLE_TEXT, false, itemType, null);
+        }
+
+        public static DrawerSettingsItem getSwitchInstance(String description, boolean isChecked, int itemType, CompoundButton.OnCheckedChangeListener callback) {
+            return new DrawerSettingsItem(description, VIEW_SWITCH, isChecked, itemType, callback);
+        }
+
+        public int getItemType() {
+            return itemType;
+        }
+
+        public void setChecked(boolean checked) {
+            isChecked = checked;
+        }
+
+        public boolean isChecked() {
+            return isChecked;
+        }
+    }
+
+    private ArrayList<DrawerSettingsItem> mData = new ArrayList<>();
+    private LayoutInflater mInflater;
+
+    public DrawerSettingsAdapter(LayoutInflater layoutInflater) {
+        mInflater = layoutInflater;
+    }
+
+    public void addItem(final DrawerSettingsItem item) {
+        mData.add(item);
+        notifyDataSetChanged();
+    }
+
+    @Override
+    public int getItemViewType(int position) {
+        DrawerSettingsItem item = mData.get(position);
+        return item.viewType;
+    }
+
+    @Override
+    public int getViewTypeCount() {
+        boolean hasSwitchItem = false;
+        for (DrawerSettingsItem item : mData) {
+            if (item.viewType == VIEW_SWITCH) {
+                hasSwitchItem = true;
+                break;
+            }
+        }
+        return hasSwitchItem ? 2 : 1;
+    }
+
+    @Override
+    public int getCount() {
+        return mData.size();
+    }
+
+    @Override
+    public DrawerSettingsItem getItem(int position) {
+        return mData.get(position);
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+
+        DrawerSettingsItem drawerSettingsItem = mData.get(position);
+        ViewHolder holder = null;
+        int type = getItemViewType(position);
+        if (convertView == null) {
+            holder = new ViewHolder();
+            switch(type) {
+                case VIEW_SIMPLE_TEXT:
+                    convertView = initTextViewBinding(holder);
+                    holder.textView.setText(drawerSettingsItem.description);
+                    break;
+                case VIEW_SWITCH:
+                    convertView = initSwitchBinding(holder);
+                    bindSwitch(drawerSettingsItem, holder);
+                    break;
+            }
+            convertView.setTag(holder);
+        } else {
+            holder = (ViewHolder)convertView.getTag();
+            switch (type) {
+                case VIEW_SIMPLE_TEXT:
+                    if (holder.isSwitchViewHolder()) {
+                        holder.resetSwitchView();
+                        convertView = initTextViewBinding(holder);
+                    }
+                    holder.textView.setText(drawerSettingsItem.description);
+                    break;
+                case VIEW_SWITCH:
+                    if (!holder.isSwitchViewHolder()) {
+                        holder.resetTextView();
+                        convertView = initSwitchBinding(holder);
+                    }
+                    bindSwitch(drawerSettingsItem, holder);
+                    break;
+            }
+            convertView.setTag(holder);
+        }
+        return convertView;
+    }
+
+    private void bindSwitch(DrawerSettingsItem drawerSettingsItem, ViewHolder holder) {
+        holder.switchView.setChecked(drawerSettingsItem.isChecked);
+        holder.switchView.setText(drawerSettingsItem.description);
+        holder.switchView.setOnCheckedChangeListener(drawerSettingsItem.callback);
+    }
+
+    @NonNull
+    private View initSwitchBinding(ViewHolder holder) {
+        View convertView = mInflater.inflate(R.layout.switch_list_item, null);
+        holder.switchView = convertView.findViewById(android.R.id.text1);
+        return convertView;
+    }
+
+    @NonNull
+    private View initTextViewBinding(ViewHolder holder) {
+        View convertView = mInflater.inflate(R.layout.single_list_item, null);
+        holder.textView = convertView.findViewById(android.R.id.text1);
+        return convertView;
+    }
+
+    public DrawerSettingsItem getDrawerItem(int elementType) {
+        for (DrawerSettingsItem item : mData) {
+            if (item.itemType == elementType) {
+                return item;
+            }
+        }
+        return null;
+    }
+
+    static class ViewHolder {
+        TextView textView;
+        SwitchCompat switchView;
+
+        boolean isSwitchViewHolder() {
+            return switchView != null;
+        }
+
+        void resetSwitchView() {
+            switchView.setOnCheckedChangeListener(null);
+            switchView = null;
+        }
+
+        void resetTextView() {
+            textView = null;
+        }
+    }
+}
+
+
+
diff --git a/app/src/main/java/se/leap/bitmaskclient/EipFragment.java b/app/src/main/java/se/leap/bitmaskclient/EipFragment.java
index 08622453..34617af3 100644
--- a/app/src/main/java/se/leap/bitmaskclient/EipFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/EipFragment.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (c) 2013 LEAP Encryption Access Project and contributers
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/app/src/main/java/se/leap/bitmaskclient/MainActivity.java b/app/src/main/java/se/leap/bitmaskclient/MainActivity.java
index b4be55a4..19294618 100644
--- a/app/src/main/java/se/leap/bitmaskclient/MainActivity.java
+++ b/app/src/main/java/se/leap/bitmaskclient/MainActivity.java
@@ -1,3 +1,19 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package se.leap.bitmaskclient;
 
 
diff --git a/app/src/main/java/se/leap/bitmaskclient/drawer/NavigationDrawerFragment.java b/app/src/main/java/se/leap/bitmaskclient/drawer/NavigationDrawerFragment.java
index 772140b0..6e39e9ed 100644
--- a/app/src/main/java/se/leap/bitmaskclient/drawer/NavigationDrawerFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/drawer/NavigationDrawerFragment.java
@@ -1,6 +1,24 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package se.leap.bitmaskclient.drawer;
 
 
+import android.app.Activity;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
@@ -11,6 +29,7 @@ import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.ActionBarDrawerToggle;
+import android.support.v7.app.AlertDialog;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.util.Log;
@@ -22,22 +41,35 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
+import android.widget.CompoundButton;
 import android.widget.ListView;
 import android.widget.Toast;
 
 import se.leap.bitmaskclient.ConfigHelper;
+import se.leap.bitmaskclient.DrawerSettingsAdapter;
+import se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem;
+import se.leap.bitmaskclient.EipFragment;
 import se.leap.bitmaskclient.Provider;
 import se.leap.bitmaskclient.ProviderListActivity;
-import se.leap.bitmaskclient.EipFragment;
 import se.leap.bitmaskclient.R;
 import se.leap.bitmaskclient.fragments.AboutFragment;
 import se.leap.bitmaskclient.fragments.LogFragment;
 
 import static android.content.Context.MODE_PRIVATE;
 import static se.leap.bitmaskclient.BitmaskApp.getRefWatcher;
+import static se.leap.bitmaskclient.ConfigHelper.getSaveBattery;
 import static se.leap.bitmaskclient.Constants.PROVIDER_KEY;
 import static se.leap.bitmaskclient.Constants.REQUEST_CODE_SWITCH_PROVIDER;
 import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.ABOUT;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.BATTERY_SAVER;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem.getSimpleTextInstance;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem.getSwitchInstance;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.LOG;
+import static se.leap.bitmaskclient.DrawerSettingsAdapter.SWITCH_PROVIDER;
+import static se.leap.bitmaskclient.R.string.about_fragment_title;
+import static se.leap.bitmaskclient.R.string.log_fragment_title;
+import static se.leap.bitmaskclient.R.string.switch_provider_menu_option;
 
 /**
  * Fragment used for managing interactions for and presentation of a navigation drawer.
@@ -63,6 +95,7 @@ public class NavigationDrawerFragment extends Fragment {
     private ListView mDrawerAccountsListView;
     private View mFragmentContainerView;
     private ArrayAdapter<String> accountListAdapter;
+    private DrawerSettingsAdapter settingsListAdapter;
 
     private boolean mFromSavedInstanceState;
     private boolean mUserLearnedDrawer;
@@ -71,17 +104,23 @@ public class NavigationDrawerFragment extends Fragment {
 
     private SharedPreferences preferences;
 
+    private final static String KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE = "KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE";
+    private boolean showEnableExperimentalFeature = false;
+    AlertDialog alertDialog;
+
     public NavigationDrawerFragment() {
     }
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
         // Read in the flag indicating whether or not the user has demonstrated awareness of the
         // drawer. See PREF_USER_LEARNED_DRAWER for details.
         preferences = getContext().getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
         mUserLearnedDrawer = preferences.getBoolean(PREF_USER_LEARNED_DRAWER, false);
+        if (savedInstanceState != null) {
+            mFromSavedInstanceState = true;
+        }
     }
 
     @Override
@@ -95,6 +134,7 @@ public class NavigationDrawerFragment extends Fragment {
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         mDrawerView = inflater.inflate(R.layout.drawer_main, container, false);
+        restoreFromSavedInstance(savedInstanceState);
         return mDrawerView;
     }
 
@@ -119,16 +159,23 @@ public class NavigationDrawerFragment extends Fragment {
                 selectItem(parent, position);
             }
         });
+        settingsListAdapter = new DrawerSettingsAdapter(getLayoutInflater());
+        if (getContext() != null) {
+            settingsListAdapter.addItem(getSwitchInstance(getString(R.string.save_battery),
+                    getSaveBattery(getContext()),
+                    BATTERY_SAVER,
+                    new CompoundButton.OnCheckedChangeListener() {
+                        @Override
+                        public void onCheckedChanged(CompoundButton buttonView, boolean newStateIsChecked) {
+                            onSwitchItemSelected(BATTERY_SAVER, newStateIsChecked);
+                        }
+                    }));
+        }
+        settingsListAdapter.addItem(getSimpleTextInstance(getString(switch_provider_menu_option), SWITCH_PROVIDER));
+        settingsListAdapter.addItem(getSimpleTextInstance(getString(log_fragment_title), LOG));
+        settingsListAdapter.addItem(getSimpleTextInstance(getString(about_fragment_title), ABOUT));
 
-        mDrawerSettingsListView.setAdapter(new ArrayAdapter<String>(
-                actionBar.getThemedContext(),
-                R.layout.single_list_item,
-                android.R.id.text1,
-                new String[]{
-                        getString(R.string.switch_provider_menu_option),
-                        getString(R.string.log_fragment_title),
-                        getString(R.string.about_fragment_title),
-                }));
+        mDrawerSettingsListView.setAdapter(settingsListAdapter);
 
         mDrawerAccountsListView = mDrawerView.findViewById(R.id.accountList);
         mDrawerAccountsListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@@ -215,12 +262,63 @@ public class NavigationDrawerFragment extends Fragment {
         if (mDrawerLayout != null) {
             mDrawerLayout.closeDrawer(mFragmentContainerView);
         }
-        onNavigationDrawerItemSelected(list, position);
+        onTextItemSelected(list, position);
     }
 
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
+        if (showEnableExperimentalFeature) {
+            outState.putBoolean(KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE, true);
+        }
+    }
+
+    private void restoreFromSavedInstance(Bundle savedInstanceState) {
+        if (savedInstanceState != null && savedInstanceState.containsKey(KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE)) {
+            showExperimentalFeatureAlert();
+        }
+    }
+
+    private void showExperimentalFeatureAlert() {
+        Activity activity = getActivity();
+        if (activity == null) {
+            return;
+        }
+
+        try {
+            AlertDialog.Builder alertBuilder = new AlertDialog.Builder(getActivity());
+            showEnableExperimentalFeature = true;
+            alertDialog = alertBuilder.setTitle(activity.getString(R.string.save_battery))
+                    .setMessage(activity.getString(R.string.save_battery_message))
+                    .setPositiveButton((android.R.string.yes), new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            DrawerSettingsItem item = settingsListAdapter.getDrawerItem(BATTERY_SAVER);
+                            item.setChecked(true);
+                            settingsListAdapter.notifyDataSetChanged();
+                            ConfigHelper.saveBattery(getContext(), item.isChecked());
+                        }
+                    })
+                    .setNegativeButton(activity.getString(android.R.string.no), new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            disableSwitch(BATTERY_SAVER);
+                        }
+                    }).setOnDismissListener(new DialogInterface.OnDismissListener() {
+                        @Override
+                        public void onDismiss(DialogInterface dialog) {
+                            showEnableExperimentalFeature = false;
+                        }
+                    }).setOnCancelListener(new DialogInterface.OnCancelListener() {
+                        @Override
+                        public void onCancel(DialogInterface dialog) {
+                            disableSwitch(BATTERY_SAVER);
+                        }
+                    }).show();
+        } catch (IllegalStateException e) {
+            e.printStackTrace();
+        }
+
     }
 
     @Override
@@ -272,7 +370,32 @@ public class NavigationDrawerFragment extends Fragment {
         return ((AppCompatActivity) getActivity()).getSupportActionBar();
     }
 
-    public void onNavigationDrawerItemSelected(AdapterView<?> parent, int position) {
+    private void onSwitchItemSelected(int elementType, boolean newStateIsChecked) {
+        switch (elementType) {
+            case BATTERY_SAVER:
+                if (ConfigHelper.getSaveBattery(getContext()) == newStateIsChecked) {
+                    //initial ui setup, ignore
+                    return;
+                }
+                if (newStateIsChecked) {
+                    showExperimentalFeatureAlert();
+                } else {
+                    ConfigHelper.saveBattery(this.getContext(), false);
+                    disableSwitch(BATTERY_SAVER);
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void disableSwitch(int elementType) {
+        DrawerSettingsItem item = settingsListAdapter.getDrawerItem(elementType);
+        item.setChecked(false);
+        settingsListAdapter.notifyDataSetChanged();
+    }
+
+    public void onTextItemSelected(AdapterView<?> parent, int position) {
         // update the main content by replacing fragments
         FragmentManager fragmentManager = getFragmentManager();
         Fragment fragment = null;
@@ -286,16 +409,17 @@ public class NavigationDrawerFragment extends Fragment {
             fragment.setArguments(arguments);
         } else {
             Log.d("Drawer", String.format("Selected position %d", position));
-            switch (position) {
-                case 0:
+            DrawerSettingsItem settingsItem = settingsListAdapter.getItem(position);
+            switch (settingsItem.getItemType()) {
+                case SWITCH_PROVIDER:
                     getActivity().startActivityForResult(new Intent(getActivity(), ProviderListActivity.class), REQUEST_CODE_SWITCH_PROVIDER);
                     break;
-                case 1:
-                    mTitle = getString(R.string.log_fragment_title);
+                case LOG:
+                    mTitle = getString(log_fragment_title);
                     fragment = new LogFragment();
                     break;
-                case 2:
-                    mTitle = getString(R.string.about_fragment_title);
+                case ABOUT:
+                    mTitle = getString(about_fragment_title);
                     fragment = new AboutFragment();
                     break;
                 default:
diff --git a/app/src/main/res/layout/drawer_main.xml b/app/src/main/res/layout/drawer_main.xml
index 26267bbb..54614f3f 100644
--- a/app/src/main/res/layout/drawer_main.xml
+++ b/app/src/main/res/layout/drawer_main.xml
@@ -1,13 +1,13 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:tools="http://schemas.android.com/tools"
-        xmlns:app="http://schemas.android.com/apk/res-auto"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical"
-        android:background="@color/colorBackground"
-        tools:context="se.leap.bitmaskclient.drawer.NavigationDrawerFragment"
-        android:clickable="true"
-        android:focusable="true">
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="@color/colorBackground"
+    tools:context="se.leap.bitmaskclient.drawer.NavigationDrawerFragment"
+    android:clickable="true"
+    android:focusable="true">
 
     <FrameLayout
         android:layout_width="match_parent"
@@ -28,7 +28,6 @@
             android:layout_height="wrap_content"
             app:srcCompat="@drawable/mask" />
     </FrameLayout>
-
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -37,14 +36,33 @@
         <ListView
             android:id="@+id/accountList"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" />
+            android:layout_height="wrap_content"
+            android:isScrollContainer="false"
+            />
 
-        <ListView
-            android:id="@+id/settingsList"
+        <View
+            android:id="@+id/divider"
+            android:layout_below="@id/accountList"
+            android:layout_width="match_parent"
+            android:layout_height="1px"
+            android:background="@android:color/darker_gray"
+            />
+
+        <FrameLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_gravity="bottom"
-            android:layout_alignParentBottom="true" />
+            android:layout_alignTop="@id/divider"
+            android:layout_alignParentBottom="true"
+            >
+            <ListView
+                android:id="@+id/settingsList"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="bottom"
+                />
+        </FrameLayout>
+
+
 
     </RelativeLayout>
 
diff --git a/app/src/main/res/layout/switch_list_item.xml b/app/src/main/res/layout/switch_list_item.xml
new file mode 100644
index 00000000..bdb9a74c
--- /dev/null
+++ b/app/src/main/res/layout/switch_list_item.xml
@@ -0,0 +1,15 @@
+<android.support.v7.widget.SwitchCompat xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@android:id/text1"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:textAppearance="?android:attr/textAppearanceListItemSmall"
+    android:gravity="center_vertical"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:paddingRight="?android:attr/listPreferredItemPaddingRight"
+    android:background="?android:attr/activatedBackgroundIndicator"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:checked="false"
+    tools:text="someOption" />
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2ea4670a..a0ca00c9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -107,4 +107,6 @@
   <string name="downloading_vpn_certificate_failed">Downloading the VPN certificate failed. Try again or choose another provider.</string>
   <string name="vpn_certificate_is_invalid">VPN certificate is invalid. Try to download a new one.</string>
   <string name="vpn_certificate_user_message">The VPN certificate is invalid. Please log in to download a new one.</string>
+  <string name="save_battery">Save battery</string>
+  <string name="save_battery_message">Background data connections will hibernate when your phone is inactive. This feature is still experimental.</string>
 </resources>