src/com/android/settings/network/telephony/CarrierSettingsVersionPreferenceController.java

/*
 * Copyright (C) 2019 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.network.telephony;

import android.content.Context;
import android.os.PersistableBundle;
import android.telephony.CarrierConfigManager;
import android.telephony.SubscriptionManager;
import android.text.TextUtils;

import com.android.settings.core.BasePreferenceController;

public class CarrierSettingsVersionPreferenceController extends BasePreferenceController {

    private int mSubscriptionId;
    private CarrierConfigManager mManager;

    public CarrierSettingsVersionPreferenceController(Context context, String preferenceKey) {
        super(context, preferenceKey);
        mManager = context.getSystemService(CarrierConfigManager.class);
        mSubscriptionId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
    }

    public void init(int subscriptionId) {
        mSubscriptionId = subscriptionId;
    }

    @Override
    public CharSequence getSummary() {
        final PersistableBundle config = mManager.getConfigForSubId(mSubscriptionId);
        if (config == null) {
            return null;
        }
        return config.getString(CarrierConfigManager.KEY_CARRIER_CONFIG_VERSION_STRING);
    }

    @Override
    public int getAvailabilityStatus() {
        return TextUtils.isEmpty(getSummary()) ? UNSUPPORTED_ON_DEVICE : AVAILABLE;
    }
}