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MutableSharedFlowDemo.kt
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MutableSharedFlowDemo.kt
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package com.fish.kotlindemo.mutablesharedflow
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.delay
import kotlinx.coroutines.flow.MutableSharedFlow
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.collect
import kotlinx.coroutines.launch
import kotlinx.coroutines.runBlocking
class MutableSharedFlowDemo {
fun test1() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>()
//发送数据(生产者)
flow.emit("hello world")
//开启协程
GlobalScope.launch {
//接收数据(消费者)
flow.collect {
println("collect: $it")
}
}
}
}
fun test2() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>()
//开启协程
GlobalScope.launch {
//接收数据(消费者)
flow.collect {
println("collect: $it")
}
}
//发送数据(生产者)
delay(200)//保证消费者已经注册上
flow.emit("hello world")
}
}
fun test3() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>(4)
//发送数据(生产者)
flow.emit("hello world1")
flow.emit("hello world2")
flow.emit("hello world3")
flow.emit("hello world4")
//开启协程
GlobalScope.launch {
//接收数据(消费者)
flow.collect {
println("collect: $it")
}
}
}
}
fun test4() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>()
//接收数据(消费者)
flow.collect {
println("collect: $it")
}
println("start emit")//①
flow.emit("hello world")
}
}
fun test5() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>()
//开启协程
GlobalScope.launch {
//接收数据(消费者)
flow.collect {
println("collect: $it")
delay(2000)
}
}
//发送数据(生产者)
delay(200)//保证消费者先执行
println("emit 1 ${System.currentTimeMillis()}")
flow.emit("hello world1")
delay(100)
println("emit 2 ${System.currentTimeMillis()}")
flow.emit("hello world2")
delay(100)
println("emit 3 ${System.currentTimeMillis()}")
flow.emit("hello world3")
delay(100)
println("emit 4 ${System.currentTimeMillis()}")
flow.emit("hello world4")
}
}
fun test6() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>(2, 2)
//开启协程
GlobalScope.launch {
//接收数据(消费者)
flow.collect {
delay(2000)
println("collect: $it")
}
}
//发送数据(生产者)
delay(200)//保证消费者先执行
println("emit 1 ${System.currentTimeMillis()}")
flow.emit("hello world1")
println("emit 2 ${System.currentTimeMillis()}")
flow.emit("hello world2")
println("emit 3 ${System.currentTimeMillis()}")
flow.emit("hello world3")
println("emit 4 ${System.currentTimeMillis()}")
flow.emit("hello world4")
}
}
fun test7() {
runBlocking {
//构造热流
val flow = MutableSharedFlow<String>(4, 3)
//开启协程
GlobalScope.launch {
//接收数据(消费者1)
flow.collect {
println("collect1: $it")
}
}
GlobalScope.launch {
//接收数据(消费者2)
flow.collect {
//模拟消费慢
delay(10000)
println("collect2: $it")
}
}
//发送数据(生产者)
delay(200)//保证消费者先执行
var count = 0
while (true) {
flow.emit("emit:${count++}")
}
}
}
fun test8() {
runBlocking {
//构造热流
val flow = MutableStateFlow("")
flow.emit("hello world")
flow.collect {
//消费者
println(it)
}
}
}
fun test9() {
runBlocking {
//构造热流
val flow = MutableStateFlow("")
flow.emit("hello world")
GlobalScope.launch {
flow.collect {
println(it)
}
}
//再发送
delay(1000)
flow.emit("hello world")
// flow.emit("hello world")
}
}
fun test10() {
runBlocking {
//构造热流
val flow = MutableStateFlow("")
flow.emit("hello world")
flow.emit("hello world1")
flow.emit("hello world2")
flow.emit("hello world3")
flow.emit("hello world4")
flow.collect {
println(it)
}
}
}
}
fun main(args: Array<String>) {
var demo = MutableSharedFlowDemo()
demo.test5()
Thread.sleep(1000000)
}