Android WorkManager-CoroutineWorker后台运行发送Notification通知到前台通知栏，kotlin

Posted 2023-03-12 zhangphil

android WorkManager-CoroutineWorker后台运行发送Notification通知到前台通知栏，kotlin（2）

 

package com.example.myapplication

import android.R
import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.content.Context
import android.graphics.Color
import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationCompat.PRIORITY_MIN
import androidx.work.*


val TAG = "zhangphil"

fun notification(context: Context, s: String): Notification 
    var channelId = createNotificationChannel(context, "com.fly", "Foreground_Service") ?: ""
    return NotificationCompat.Builder(context, channelId)
        .setOngoing(true)
        .setSmallIcon(R.drawable.ic_notification_overlay)
        .setContentTitle("我的标题")
        .setContentText(s)
        .setPriority(PRIORITY_MIN)
        .setCategory(Notification.CATEGORY_SERVICE)
        .build()



private fun createNotificationChannel(
    context: Context,
    channelId: String,
    channelName: String
): String? 
    val channel = NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_NONE)
    channel.lightColor = Color.BLUE
    channel.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
    val service = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    service?.createNotificationChannel(channel)

    return channelId



class ForegroundWorker(private val context: Context, parameters: WorkerParameters) :
    CoroutineWorker(context, parameters) 

    override suspend fun getForegroundInfo(): ForegroundInfo 
        return ForegroundInfo(1, notification(context, "zhangphil"))
    

    override suspend fun doWork(): Result 
        setForegroundAsync(getForegroundInfo())

        repeat(1000) 
            Thread.sleep(1000)
            Log.d(TAG, "do work " + it)
        

        return Result.success()
    



class MainActivity : AppCompatActivity() 
    override fun onCreate(savedInstanceState: Bundle?) 
        super.onCreate(savedInstanceState)

        val request = OneTimeWorkRequestBuilder<ForegroundWorker>()
            .setExpedited(OutOfQuotaPolicy.DROP_WORK_REQUEST)
            .build()

        WorkManager.getInstance(applicationContext)
            .enqueue(request)
    

    override fun onStart() 
        super.onStart()
        println("前台")
    

    override fun onStop() 
        super.onStop()
        println("后台")
    

 

配置权限：

<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>

 

记得在手机的应用列表设置运行这个app允许通知。

 

android现代化后台任务WorkManager，kotlin（1）_zhangphil的博客-CSDN博客Android可保活的、不依附于应用进程存活的后台任务框架：WorkManagerWorkManager旨在实现不依附与App进程的后台线程化任务。和JobSchedule 相似，是JobSchedule 的改进。WorkManager可实现：一次性执行任务，链式执行任务，周期性执行任务，一定条件下（网络，电量）执行任务，设备重启后执行上次未完成任务等。Android可保活的、不依附于应用进程存活的后台任务框架：WorkManager_workmanager 保活_zhangphil的博客-CSDN博客。https://blog.csdn.net/zhangphil/article/details/129379527