Hardware key disable support

Change-Id: I42f8b3b9423e218eb612bb8ff57baa58280392e6
Signed-off-by: SagarMakhar <sagarmakhar@gmail.com>
Signed-off-by: Hưng Phan <phandinhhungvp2001@gmail.com>

res/values/cherish_strings.xml

@@ -348,4 +348,8 @@
     <string name="button_backlight_on_touch_only_title">Button backlight touch</string>
     <string name="button_backlight_on_touch_only_summary">Button backlight will only appear when buttons are pressed rather than on all the time. Timeout still impacts this feature.</string>
 
+    <!-- Hardware keys -->
+    <string name="hardware_keys_category">Hardware navigation buttons</string>
+    <string name="hardware_keys_disable_title">Disable hardware buttons</string>
+
 </resources>

res/xml/cherish_settings_button.xml

@@ -18,6 +18,13 @@
         android:title="@string/button_title"
         xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">
 		
+		<PreferenceCategory android:key="hardware_keys"
+	android:title="@string/hardware_keys_category">
+
+	<SwitchPreference android:key="hardware_keys_disable"
+		android:title="@string/hardware_keys_disable_title" />
+    </PreferenceCategory>
+		
 		<PreferenceCategory
         android:key="volume_category"
         android:title="@string/volume_category">

src/com/cherish/settings/fragments/ButtonSettings.java

@@ -59,7 +59,10 @@ import java.util.List;
 @SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
 public class ButtonSettings extends ActionFragment implements OnPreferenceChangeListener {
 
+    private static final String HWKEY_DISABLE = "hardware_keys_disable";
+
     // category keys
+    private static final String CATEGORY_HWKEY = "hardware_keys";
     private static final String CATEGORY_BACK = "back_key";
     private static final String CATEGORY_HOME = "home_key";
     private static final String CATEGORY_MENU = "menu_key";
@@ -84,6 +87,7 @@ public class ButtonSettings extends ActionFragment implements OnPreferenceChange
 
     private static final String TORCH_POWER_BUTTON_GESTURE = "torch_power_button_gesture";
 
+    private SwitchPreference mHwKeyDisable;
     private ListPreference mTorchPowerButton;
     private CustomSeekBarPreference mButtonTimoutBar;
     private CustomSeekBarPreference mManualButtonBrightness;
@@ -97,6 +101,22 @@ public class ButtonSettings extends ActionFragment implements OnPreferenceChange
         final Resources res = getResources();
         final ContentResolver resolver = getActivity().getContentResolver();
         final PreferenceScreen prefScreen = getPreferenceScreen();
+
+        final boolean needsNavbar = ActionUtils.hasNavbarByDefault(getActivity());
+        final PreferenceCategory hwkeyCat = (PreferenceCategory) prefScreen
+                .findPreference(CATEGORY_HWKEY);
+        int keysDisabled = 0;
+        if (!needsNavbar) {
+            mHwKeyDisable = (SwitchPreference) findPreference(HWKEY_DISABLE);
+            keysDisabled = Settings.System.getIntForUser(getContentResolver(),
+                    Settings.System.HARDWARE_KEYS_DISABLE, 0,
+                    UserHandle.USER_CURRENT);
+            mHwKeyDisable.setChecked(keysDisabled != 0);
+            mHwKeyDisable.setOnPreferenceChangeListener(this);
+        } else {
+            prefScreen.removePreference(hwkeyCat);
+        }
+
          // bits for hardware keys present on device
         final int deviceKeys = getResources().getInteger(
                 com.android.internal.R.integer.config_deviceHardwareKeys);
@@ -140,8 +160,11 @@ public class ButtonSettings extends ActionFragment implements OnPreferenceChange
         }
          // let super know we can load ActionPreferences
         onPreferenceScreenLoaded(ActionConstants.getDefaults(ActionConstants.HWKEYS));
-		
+
-		// screen off torch
+        // load preferences first
+        setActionPreferencesEnabled(keysDisabled == 0);
+
+        // screen off torch
         mTorchPowerButton = (ListPreference) findPreference(TORCH_POWER_BUTTON_GESTURE);
         int mTorchPowerButtonValue = Settings.System.getInt(resolver,
                 Settings.System.TORCH_POWER_BUTTON_GESTURE, 0);
@@ -186,6 +209,11 @@ public class ButtonSettings extends ActionFragment implements OnPreferenceChange
             Settings.System.putInt(resolver, Settings.System.TORCH_POWER_BUTTON_GESTURE,
                     mTorchPowerButtonValue);
             return true;
+        } else if (preference == mHwKeyDisable) {
+            boolean value = (Boolean) newValue;
+            Settings.System.putInt(getContentResolver(), Settings.System.HARDWARE_KEYS_DISABLE,
+                    value ? 1 : 0);
+            setActionPreferencesEnabled(!value);
         } else if (preference == mButtonTimoutBar) {
             int buttonTimeout = (Integer) newValue;
             Settings.System.putInt(getContentResolver(),