1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.network.telephony 18 19 import android.content.Context 20 import android.telephony.ServiceState 21 import android.telephony.TelephonyCallback 22 import android.util.Log 23 import kotlinx.coroutines.flow.Flow 24 25 private const val TAG = "ServiceStateFlow" 26 27 /** Creates an instance of a cold Flow for [ServiceState] of given [subId]. */ Contextnull28fun Context.serviceStateFlow(subId: Int): Flow<ServiceState> = telephonyCallbackFlow(subId) { 29 object : TelephonyCallback(), TelephonyCallback.ServiceStateListener { 30 override fun onServiceStateChanged(serviceState: ServiceState) { 31 trySend(serviceState) 32 Log.d(TAG, "[$subId] serviceState: $serviceState") 33 } 34 } 35 } 36