src/com/android/phone/ImsUtil.java

/*
 * Copyright 2013 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.phone;

import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.provider.Settings.SettingNotFoundException;
import android.util.Log;

import com.android.internal.telephony.Phone;
import com.android.phone.PhoneGlobals;

public class ImsUtil {

    private static final String TAG = ImsUtil.class.getSimpleName();
    private static boolean sImsPhoneSupported = false;

    private ImsUtil() {
    }

    static {
        PhoneGlobals app = PhoneGlobals.getInstance();
        sImsPhoneSupported = true;
    }

    /**
     * @return true if this device supports voice calls using the built-in SIP stack.
     */
    static boolean isImsPhoneSupported() {
        return sImsPhoneSupported;

    }

    /**
     * @see MobileNetworkSettings#setIMS
     * @param context The context to get the content resolver from.
     * @return Whether IMS is turned on by the user system setting.
     */
    static boolean isImsEnabled(Context context) {
        int value = 0;
        try {
            value = android.provider.Settings.Global.getInt(
                    context.getContentResolver(),
                    android.provider.Settings.Global.VOLTE_VT_ENABLED);
        } catch (SettingNotFoundException e) {
            return false;
        }

        switch (value) {
            case 0:
                return false;
            case 1:
                return true;
            default:
                Log.wtf(TAG,"Unexpected value for VOLTE_VT_ENABLED: " + value);
                return false;
        }
    }
}