src/com/android/settings/wifi/tether/WifiTetherSSIDPreferenceController.java

/*
 * Copyright (C) 2017 The Android Open Source 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.android.settings.wifi.tether;

import android.content.Context;
import android.net.wifi.WifiConfiguration;
import android.support.annotation.VisibleForTesting;
import android.support.v7.preference.EditTextPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;

import com.android.settings.widget.ValidatedEditTextPreference;
import com.android.settings.wifi.WifiUtils;

public class WifiTetherSSIDPreferenceController extends WifiTetherBasePreferenceController
        implements ValidatedEditTextPreference.Validator {

    private static final String PREF_KEY = "wifi_tether_network_name";
    @VisibleForTesting
    static final String DEFAULT_SSID = "AndroidAP";

    private String mSSID;

    public WifiTetherSSIDPreferenceController(Context context,
            OnTetherConfigUpdateListener listener) {
        super(context, listener);
    }

    @Override
    public String getPreferenceKey() {
        return PREF_KEY;
    }

    @Override
    public void displayPreference(PreferenceScreen screen) {
        super.displayPreference(screen);
        final WifiConfiguration config = mWifiManager.getWifiApConfiguration();
        if (config != null) {
            mSSID = config.SSID;
        } else {
            mSSID = DEFAULT_SSID;
        }
        ((ValidatedEditTextPreference) mPreference).setValidator(this);
        updateSsidDisplay((EditTextPreference) mPreference);
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        mSSID = (String) newValue;
        updateSsidDisplay((EditTextPreference) preference);
        mListener.onTetherConfigUpdated();
        return true;
    }

    @Override
    public boolean isTextValid(String value) {
        return !WifiUtils.isSSIDTooLong(value) && !WifiUtils.isSSIDTooShort(value);
    }

    public String getSSID() {
        return mSSID;
    }

    private void updateSsidDisplay(EditTextPreference preference) {
        preference.setText(mSSID);
        preference.setSummary(mSSID);
    }
}