Remove band preference in WiFi settings.

Bug: b/25743379

Change-Id: Iddea166e0e0925fffb70de80978501945e8999a7

res/values/arrays.xml

@@ -365,28 +365,6 @@
         <item>Set usage cycle...</item>
     </string-array>
 
-    <!-- Wi-Fi settings. Presented as a list dialog to the user to choose the Wi-Fi frequency band. -->
-    <string-array name="wifi_frequency_band_entries">
-        <!-- Operation on both 2.4 GHz and 5 GHz [CHAR LIMIT=25]-->
-        <item>Automatic</item>
-        <!-- Operation on 5 GHz alone [CHAR LIMIT=25]-->
-        <item>5 GHz only</item>
-        <!-- Operation on 2.4 GHz alone [CHAR LIMIT=25]-->
-        <item>2.4 GHz only</item>
-    </string-array>
-
-    <!-- Match with wifi_frequency_band_entries and the values of the settings in WifiManager. -->
-    <!-- Do not translate. -->
-    <string-array name="wifi_frequency_band_values">
-        <!-- Do not translate. -->
-        <item>0</item>
-        <!-- Do not translate. -->
-        <item>1</item>
-        <!-- Do not translate. -->
-        <item>2</item>
-    </string-array>
-
-
     <!-- Display options for UsageStats class -->
     <string-array name="usage_stats_display_order_types">
         <item>Usage time</item>

res/values/strings.xml

@@ -1791,12 +1791,6 @@
     <string name="wifi_advanced_titlebar">Advanced Wi\u2011Fi</string>
     <!-- Wi-Fi settings screen, configure, settings section.  This is a header shown above configure wifi settings. [CHAR LIMIT=30] -->
     <string name="wifi_configure_titlebar">Configure Wi\u2011Fi</string>
-    <!-- Wi-Fi settings screen, setting title for setting the band [CHAR LIMIT=50]-->
-    <string name="wifi_setting_frequency_band_title">Wi\u2011Fi frequency band</string>
-    <!-- Wi-Fi settings screen, setting summary for setting the wifi frequency band [CHAR LIMIT=50]-->
-    <string name="wifi_setting_frequency_band_summary">Specify the frequency range of operation</string>
-    <!-- Wi-Fi settings screen, error message when the frequency band could not be set [CHAR LIMIT=50]. -->
-    <string name="wifi_setting_frequency_band_error">There was a problem setting the frequency band.</string>
     <!-- Wi-Fi settings screen, advanced, title of the item to show the Wi-Fi device's MAC address. -->
     <string name="wifi_advanced_mac_address_title">MAC address</string>
     <!-- Title of the screen to adjust IP settings -->

res/xml/wifi_configure_settings.xml

@@ -40,13 +40,6 @@
         android:summary="@string/wifi_automatically_connect_summary"
         android:dialogTitle="@string/wifi_select_assistant_dialog_title" />
 
-    <ListPreference
-        android:key="frequency_band"
-        android:title="@string/wifi_setting_frequency_band_title"
-        android:summary="@string/wifi_setting_frequency_band_summary"
-        android:entries="@array/wifi_frequency_band_entries"
-        android:entryValues="@array/wifi_frequency_band_values" />
-
     <Preference
         android:key="mac_address"
         android:title="@string/wifi_advanced_mac_address_title"

src/com/android/settings/wifi/ConfigureWifiSettings.java

@@ -49,7 +49,6 @@ public class ConfigureWifiSettings extends SettingsPreferenceFragment
     private static final String KEY_MAC_ADDRESS = "mac_address";
     private static final String KEY_SAVED_NETWORKS = "saved_networks";
     private static final String KEY_CURRENT_IP_ADDRESS = "current_ip_address";
-    private static final String KEY_FREQUENCY_BAND = "frequency_band";
     private static final String KEY_NOTIFY_OPEN_NETWORKS = "notify_open_networks";
     private static final String KEY_SLEEP_POLICY = "sleep_policy";
     private static final String KEY_WIFI_ASSISTANT = "wifi_assistant";
@@ -114,24 +113,6 @@ public class ConfigureWifiSettings extends SettingsPreferenceFragment
             getPreferenceScreen().removePreference(mWifiAssistantPreference);
         }
 
-        ListPreference frequencyPref = (ListPreference) findPreference(KEY_FREQUENCY_BAND);
-
-        if (mWifiManager.isDualBandSupported()) {
-            frequencyPref.setOnPreferenceChangeListener(this);
-            int value = mWifiManager.getFrequencyBand();
-            if (value != -1) {
-                frequencyPref.setValue(String.valueOf(value));
-                updateFrequencyBandSummary(frequencyPref, value);
-            } else {
-                Log.e(TAG, "Failed to fetch frequency band");
-            }
-        } else {
-            if (frequencyPref != null) {
-                // null if it has already been removed before resume
-                getPreferenceScreen().removePreference(frequencyPref);
-            }
-        }
-
         ListPreference sleepPolicyPref = (ListPreference) findPreference(KEY_SLEEP_POLICY);
         if (sleepPolicyPref != null) {
             if (Utils.isWifiOnly(context)) {
@@ -186,17 +167,7 @@ public class ConfigureWifiSettings extends SettingsPreferenceFragment
         final Context context = getActivity();
         String key = preference.getKey();
 
-        if (KEY_FREQUENCY_BAND.equals(key)) {
+        if (KEY_WIFI_ASSISTANT.equals(key)) {
-            try {
-                int value = Integer.parseInt((String) newValue);
-                mWifiManager.setFrequencyBand(value, true);
-                updateFrequencyBandSummary(preference, value);
-            } catch (NumberFormatException e) {
-                Toast.makeText(context, R.string.wifi_setting_frequency_band_error,
-                        Toast.LENGTH_SHORT).show();
-                return false;
-            }
-        } else if (KEY_WIFI_ASSISTANT.equals(key)) {
             NetworkScorerAppManager.NetworkScorerAppData wifiAssistant =
                     NetworkScorerAppManager.getScorer(context, (String) newValue);
             if (wifiAssistant == null) {