android創建通知欄（kotlin版）

轉載請註明出處：https://blog.csdn.net/u011038298/article/details/84346108 

import android.app.Application
import android.app.NotificationChannel
import android.app.NotificationManager
import android.os.Build
import java.util.*

/**
 * 應用程序
 */
class BaseApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        createNotificationChannel()
    }

    /**
     * 創建通知欄渠道
     */
    private fun createNotificationChannel() {
        /**
         * 在API 26+ 創建NotificationChannel
         */
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val list = ArrayList<HashMap<String, String>>()
            var hashMap: HashMap<String, String> = HashMap()
            hashMap["name"] = "聊天"
            hashMap["description"] = "聊天消息通知"
            hashMap["channel"] = Constant.notifyChannelChat
            list.add(hashMap)

            hashMap = HashMap()
            hashMap["name"] = "訂閱"
            hashMap["description"] = "訂閱消息通知"
            hashMap["channel"] = Constant.notifyChannelSubscription
            list.add(hashMap)

            hashMap = HashMap()
            hashMap["name"] = "推薦"
            hashMap["description"] = "推薦消息通知"
            hashMap["channel"] = Constant.notifyChannelRecommend
            list.add(hashMap)

            hashMap = HashMap()
            hashMap["name"] = "新聞"
            hashMap["description"] = "新聞消息通知"
            hashMap["channel"] = Constant.notifyChannelNews
            list.add(hashMap)

            hashMap = HashMap()
            hashMap["name"] = "其他"
            hashMap["description"] = "其他消息通知"
            hashMap["channel"] = Constant.notifyChannelOther
            list.add(hashMap)

            val notificationManager = getSystemService(NotificationManager::class.java)
            for (i in list.indices) {
                val map = list[i]
                val textName = MapUtil.getMapValue(map, "name")
                val textDescription = MapUtil.getMapValue(map, "description")
                val textChannel = MapUtil.getMapValue(map, "channel")
                val channelChat = NotificationChannel(textChannel, textName, NotificationManager.IMPORTANCE_DEFAULT).apply {
                    description = textDescription
                }
                notificationManager.createNotificationChannel(channelChat)
            }
        }
    }

}

 

import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.widget.Button
import java.util.*

/**
 * 主界面
 */
class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        findViewById<Button>(R.id.btn_notification).setOnClickListener {
            val map = HashMap<String, String>()
            map["channel"] = "1"
            map["title"] = "張三"
            map["content"] = "你最近還好嗎?"
            map["big_text"] = "-------------------------------------------------------------"
            // https://developer.android.com/training/notify-user/build-notification?hl=zh-cn#java
            NotificationUtil.sendNotification(this, map)
        }
    }

}

 

import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.media.RingtoneManager
import android.support.v4.app.NotificationCompat
import android.support.v4.app.NotificationManagerCompat
import android.text.TextUtils
import java.util.*

/**
 * 通知欄工具類
 */
object NotificationUtil {

    fun sendNotification(context: Context?, map: Map<String, String>?) {
        if (context != null && map != null) {
            val channel = MapUtil.getMapValue(map, "channel", "0")
            val channelId = Constant.notifyChannelOther
            when (channel) {
                "0" -> Constant.notifyChannelOther
                "1" -> Constant.notifyChannelChat
                "2" -> Constant.notifyChannelNews
                "3" -> Constant.notifyChannelRecommend
                "4" -> Constant.notifyChannelSubscription
            }
            val title = MapUtil.getMapValue(map, "title")
            val content = MapUtil.getMapValue(map, "content")
            // 設置通知內容，構造函數要求您提供通道ID。這是與Android 8.0（API級別26）及更高版本兼容所必需的，但舊版本會忽略這一點
            var mBuilder = NotificationCompat.Builder(context, channelId)
                    .setSmallIcon(R.drawable.notification_icon)
                    .setContentTitle(title)
                    .setContentText(content)
                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                    .setAutoCancel(true)
                    .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
            val bigText = MapUtil.getMapValue(map, "big_text")
            // 如果bigText的值不爲空
            if (!TextUtils.isEmpty(bigText)) {
                // 如果您希望通知更長，可以通過添加樣式模板來啓用可擴展通知
                mBuilder.setStyle(NotificationCompat.BigTextStyle().bigText(bigText))
            }

            // 爲應用中的活動創建明確的意圖
            val intent = Intent(context, NotificationClickReceiver::class.java).apply {
                action = NotificationClickReceiver.noticeClick
                putExtras(MapUtil.getBundle(map))
            }
            val pendingIntent = PendingIntent.getBroadcast(context, Random().nextInt(1000), intent, PendingIntent.FLAG_UPDATE_CURRENT)
            mBuilder.setContentIntent(pendingIntent)

            // 顯示通知，注意：從Android 8.1（API級別27）開始，應用程序無法每秒發出超過一次的通知。
            // 如果您的應用在一秒鐘內發佈了多個通知，則它們都會按預期顯示，但每秒只有第一個通知發出聲音
            with(NotificationManagerCompat.from(context)) {
                // notificationId is a unique int for each notification that you must define
                notify(Random().nextInt(1000), mBuilder.build())
            }
        }
    }

}

 

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.widget.Toast

/**
 * 監聽通知欄點擊事件
 */
class NotificationClickReceiver : BroadcastReceiver() {

    companion object {
        const val noticeClick = "android.intent.action.noticeClick"
    }

    override fun onReceive(context: Context?, intent: Intent?) {
        if (context != null && intent != null && intent.action != null && intent.action == noticeClick) {
            // 通知欄被點擊
            val bundle = intent.extras
            if (bundle != null) {
                Toast.makeText(context, "收到消息", Toast.LENGTH_SHORT).show()
            }
        }
    }

}

 

import android.os.Bundle
import android.text.TextUtils

/**
 * Map工具類
 */
object MapUtil {

    /**
     * 根據map的key取map的值
     */
    fun getMapValue(map: Map<String, String>, key: String): String {
        // 因爲map爲非安全的，map的key和value有可能爲null，所以要加入判斷，在取值時可以附加一個空字符串來避免空指針
        return if (map.containsKey(key)) map[key] + "" else ""
    }

    /**
     * 根據map的key取map的值，當map的值爲空時取傳過來的默認值
     */
    fun getMapValue(map: Map<String, String>, key: String, defaultValue: String): String {
        // 因爲map爲非安全的，map的key和value有可能爲null，所以要加入判斷，在取值時可以附加一個空字符串來避免空指針
        return if (map.containsKey(key)) {
            val value = map[key]
            return when {value != null -> value
                else -> defaultValue
            }
        } else {
            defaultValue
        }
    }

    /**
     * 把map轉換成bundle
     */
    fun getBundle(map: Map<String, String>): Bundle {
        val bundle = Bundle()
        for ((key, value) in map) {
            if (!TextUtils.isEmpty(key)) {
                bundle.putString(key, value)
            }
        }
        return bundle
    }

}

 

/**
 * 常量類
 */
object Constant {

    // 通知渠道ID：即時通訊
    const val notifyChannelChat = "chat"
    // 通知渠道ID：訂閱筍盤
    const val notifyChannelSubscription = "subscription"
    // 通知渠道ID：物件推薦
    const val notifyChannelRecommend = "recommend"
    // 通知渠道ID：地產新聞
    const val notifyChannelNews = "news"
    // 通知渠道ID：其他通知
    const val notifyChannelOther = "other"

}

 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="">

    <application
        android:name=".BaseApplication">

        <receiver android:name=".NotificationClickReceiver">
            <intent-filter>
                <action android:name="android.intent.action.noticeClick" />
            </intent-filter>
        </receiver>

    </application>

</manifest>

點擊查看java版