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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.wifi.tether;
     18 
     19 import static android.net.wifi.WifiConfiguration.AP_BAND_2GHZ;
     20 import static android.net.wifi.WifiConfiguration.AP_BAND_5GHZ;
     21 
     22 import android.content.Context;
     23 import android.content.res.Resources;
     24 import android.icu.text.ListFormatter;
     25 import android.net.wifi.WifiConfiguration;
     26 import android.support.v7.preference.Preference;
     27 import android.util.Log;
     28 
     29 import com.android.settings.R;
     30 import com.android.settings.widget.HotspotApBandSelectionPreference;
     31 
     32 public class WifiTetherApBandPreferenceController extends WifiTetherBasePreferenceController {
     33 
     34     private static final String TAG = "WifiTetherApBandPref";
     35     private static final String PREF_KEY = "wifi_tether_network_ap_band";
     36     public static final String[] BAND_VALUES =
     37             {String.valueOf(AP_BAND_2GHZ), String.valueOf(AP_BAND_5GHZ)};
     38 
     39     private final String[] mBandEntries;
     40     private final String[] mBandSummaries;
     41     private int mBandIndex;
     42 
     43     public WifiTetherApBandPreferenceController(Context context,
     44             OnTetherConfigUpdateListener listener) {
     45         super(context, listener);
     46         Resources res = mContext.getResources();
     47         mBandEntries = res.getStringArray(R.array.wifi_ap_band_config_full);
     48         mBandSummaries = res.getStringArray(R.array.wifi_ap_band_summary_full);
     49     }
     50 
     51     @Override
     52     public void updateDisplay() {
     53         final WifiConfiguration config = mWifiManager.getWifiApConfiguration();
     54         if (config == null) {
     55             mBandIndex = 0;
     56             Log.d(TAG, "Updating band index to 0 because no config");
     57         } else if (is5GhzBandSupported()) {
     58             mBandIndex = config.apBand;
     59             Log.d(TAG, "Updating band index to " + mBandIndex);
     60         } else {
     61             config.apBand = 0;
     62             mWifiManager.setWifiApConfiguration(config);
     63             mBandIndex = config.apBand;
     64             Log.d(TAG, "5Ghz not supported, updating band index to " + mBandIndex);
     65         }
     66         HotspotApBandSelectionPreference preference =
     67                 (HotspotApBandSelectionPreference) mPreference;
     68 
     69         if (!is5GhzBandSupported()) {
     70             preference.setEnabled(false);
     71             preference.setSummary(R.string.wifi_ap_choose_2G);
     72         } else {
     73             preference.setExistingConfigValue(config.apBand);
     74             preference.setSummary(getConfigSummary());
     75         }
     76     }
     77 
     78     String getConfigSummary() {
     79         if (mBandIndex == WifiConfiguration.AP_BAND_ANY) {
     80             return ListFormatter.getInstance().format((Object[]) mBandSummaries);
     81         }
     82         return mBandSummaries[mBandIndex];
     83     }
     84 
     85     @Override
     86     public String getPreferenceKey() {
     87         return PREF_KEY;
     88     }
     89 
     90     @Override
     91     public boolean onPreferenceChange(Preference preference, Object newValue) {
     92         mBandIndex = (Integer) newValue;
     93         Log.d(TAG, "Band preference changed, updating band index to " + mBandIndex);
     94         preference.setSummary(getConfigSummary());
     95         mListener.onTetherConfigUpdated();
     96         return true;
     97     }
     98 
     99     private boolean is5GhzBandSupported() {
    100         final String countryCode = mWifiManager.getCountryCode();
    101         if (!mWifiManager.isDualBandSupported() || countryCode == null) {
    102             return false;
    103         }
    104         return true;
    105     }
    106 
    107     public int getBandIndex() {
    108         return mBandIndex;
    109     }
    110 }
    111