common/device-side/preconditions/src/com/android/compatibility/common/preconditions/TelephonyHelper.java

/*
 * Copyright (C) 2016 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.compatibility.common.preconditions;

import android.content.Context;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

/**
 * TelephonyHelper is used to check whether the device has a SIM card with phone number.
 */
public class TelephonyHelper {
    /*
     * This helper returns false if the device doesn't have a SIM card with phone number.
     */
    public static boolean hasPhoneNumber(Context context) {
        TelephonyManager telephony =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);

        return !TextUtils.isEmpty(telephony.getLine1Number());
    }
}