我正在尝试创建一个安排通知的方法。在该方法中,我初始化了 AlarmManager
这将使我能够按需接收 Intent。但是,我的代码中出现以下语法错误:
Type mismatch. Required: Context Found: String
在以下行:
var alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
下面是我的代码:
package com.example.notificationapp
import android.app.AlarmManager
import android.app.NotificationManager
import android.app.PendingIntent
import android.app.PendingIntent.getActivity
import android.content.Context
import android.content.Intent
import androidx.core.app.NotificationCompat
import androidx.core.content.ContextCompat.getSystemService
import java.security.AccessController.getContext
import java.util.*
// Channel
class Notification(context:Context, notificationManager: NotificationManager, title:String, description:String, date: Date) {
// Attributes
private lateinit var context:Context;
private var title:String = ""
private var description:String = ""
private lateinit var date:Date;
private lateinit var notificationManager:NotificationManager;
// Initialization
init {
// Download the constructor parameters into the object's attributes
this.context = context
this.title = title
this.description = description
this.date = date
this.notificationManager = notificationManager
}
// Method to set the notification at a specific time
fun setNotificationAtTime(time:Date) {
var notificationIntent = Intent(this.context, NotificationBroadcast::class.java)
var pendingNotificationIntent = PendingIntent.getBroadcast(this.context,
0, notificationIntent, 0)
// Initialize an AlarmManager that allows us to receive intents on demand
var alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
val builder = NotificationCompat.Builder(context, "com.example.notificationapp")
}
}
最佳答案
这是因为您使用的是 ContextCompat.getSystemService
而不是 Context.getSystemService
.
所以你在这里有两个选择:
ContextCompat.getSystemService
使用正确的签名:getSystemService(context, AlarmManager::class.java)
Context.getSystemService
删除导入语句:androidx.core.content.ContextCompat.getSystemService
关于安卓 Kotlin : Required Context but found String,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61709097/