src/com/android/telecomm/TelephonyUtil.java

/*
 * Copyright 2014, 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.telecomm;

import android.content.ComponentName;
import android.content.Context;
import android.net.Uri;
import android.telephony.PhoneNumberUtils;

/**
 * Utilities to deal with the system telephony services. The system telephony services are treated
 * differently from 3rd party services in some situations (emergency calls, audio focus, etc...).
 */
public final class TelephonyUtil {
    private static final String TAG = TelephonyUtil.class.getSimpleName();

    private static final String TELEPHONY_PACKAGE_NAME = "com.android.phone";

    private static final String PSTN_CALL_SERVICE_CLASS_NAME =
            "com.android.services.telephony.TelephonyConnectionService";

    private TelephonyUtil() {}

    static boolean isPstnComponentName(ComponentName componentName) {
        final ComponentName pstnComponentName = new ComponentName(
                TELEPHONY_PACKAGE_NAME, PSTN_CALL_SERVICE_CLASS_NAME);
        return pstnComponentName.equals(componentName);
    }

    static boolean shouldProcessAsEmergency(Context context, Uri handle) {
        return handle != null && PhoneNumberUtils.isPotentialLocalEmergencyNumber(
                context, handle.getSchemeSpecificPart());
    }
}