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.settingslib.spaprivileged.database 18 19 import android.content.Context 20 import android.database.ContentObserver 21 import android.net.Uri 22 import kotlinx.coroutines.Dispatchers 23 import kotlinx.coroutines.channels.awaitClose 24 import kotlinx.coroutines.flow.Flow 25 import kotlinx.coroutines.flow.callbackFlow 26 import kotlinx.coroutines.flow.conflate 27 import kotlinx.coroutines.flow.flowOn 28 29 /** Content change flow for the given [uri]. */ Contextnull30fun Context.contentChangeFlow( 31 uri: Uri, 32 sendInitial: Boolean = true, 33 ): Flow<Unit> = callbackFlow { 34 val contentObserver = object : ContentObserver(null) { 35 override fun onChange(selfChange: Boolean) { 36 trySend(Unit) 37 } 38 } 39 contentResolver.registerContentObserver(uri, false, contentObserver) 40 if (sendInitial) { 41 trySend(Unit) 42 } 43 44 awaitClose { contentResolver.unregisterContentObserver(contentObserver) } 45 }.conflate().flowOn(Dispatchers.Default) 46