111 lines
4.5 KiB
Plaintext
111 lines
4.5 KiB
Plaintext
import { UTSAndroid } from "io.dcloud.uts";
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import Activity from 'android.app.Activity';
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import Bundle from 'android.os.Bundle';
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import Service from 'android.app.Service';
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import Intent from 'android.content.Intent';
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import IBinder from 'android.os.IBinder';
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import NotificationCompat from 'androidx.core.app.NotificationCompat';
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import Build from 'android.os.Build';
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import System from 'java.lang.System';
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import NotificationManager from 'android.app.NotificationManager';
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import NotificationChannel from 'android.app.NotificationChannel';
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import Context from 'android.content.Context';
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import Notification from 'android.app.Notification';
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import PowerManager from 'android.os.PowerManager';
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class ConnectedDeviceService extends Service {
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static notificationContentText : string = '应用正在后台运行,这有助于提供定制的服务和改善用户体验。'
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static notificationContentTitle : string = '后台应用持续运行'
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wakeLock : PowerManager.WakeLock | null = null;
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constructor() {
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super();
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}
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override onCreate() : void {
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const powerManager : PowerManager = UTSAndroid.getAppContext()!.getSystemService(Context.POWER_SERVICE) as PowerManager;
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this.wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyApp:MyWakelockTag");
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super.onCreate();
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
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//对于Android O及以上版本，如果你的应用处于后台，你需要将服务转变为前台服务来避免系统在一定时间后杀死服务。这需要通过创建一个持续在通知栏显示的通知来实现。
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this.startMyOwnForeground();
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} else {
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this.startForeground(1, new Notification());
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}
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}
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override onStartCommand(intent : Intent, flags : Int, startId : Int) : Int {
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// 在这里执行后台任务
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this.wakeLock?.acquire();
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// 使服务在被杀死后自动重启
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// return START_STICKY;
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return START_STICKY
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}
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startMyOwnForeground() : void {
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try {
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const NOTIFICATION_CHANNEL_ID = "connectedDevice";
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const channelName = "My Background connectedDevice Service";
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const chan : NotificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_DEFAULT);
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chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
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const manager : NotificationManager = UTSAndroid.getAppContext()!.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager;
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manager.createNotificationChannel(chan);
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const notificationBuilder : NotificationCompat.Builder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
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const notification : Notification = notificationBuilder.setOngoing(true)
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.setContentText(ConnectedDeviceService.notificationContentText)
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.setContentTitle(ConnectedDeviceService.notificationContentTitle)
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.setSmallIcon(android.R.drawable.ic_menu_mylocation)
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.setVisibility(Notification.VISIBILITY_PUBLIC) // 可以在锁屏时显示
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.setPriority(NotificationManager.IMPORTANCE_DEFAULT)
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.setCategory(Notification.CATEGORY_SERVICE)
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.setWhen(System.currentTimeMillis())
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.build();
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this.startForeground(2, notification);
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} catch (e) {
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console.log(e)
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//TODO handle the exception
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}
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}
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override onBind(intent : Intent) : IBinder | null {
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// 此例中不处理绑定服务的情况
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return null;
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}
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override onDestroy() : void {
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super.onDestroy();
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// 清理资源，例如注销广播接收器或停止自定义线程
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// 释放Wakelock锁
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if (this.wakeLock!.isHeld()) {
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this.wakeLock!.release();
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this.wakeLock = null
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}
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}
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}
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// // 开启服务
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export function startConnectedDeviceService(title ?: string, context ?: string) : void {
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console.log('开启后台运行service')
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if (title != null) {
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ConnectedDeviceService.notificationContentTitle = title as string
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}
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if (context != null) {
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ConnectedDeviceService.notificationContentText = context as string
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}
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// 获取实例如下所示，首次获取实例会做初始化操作，可能会有耗时，因此可以尽可能提前初始化时机。
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let serviceIntent : Intent = new Intent(UTSAndroid.getUniActivity(), ConnectedDeviceService().javaClass);
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// 设置连接配置
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
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UTSAndroid.getAppContext()!.startForegroundService(serviceIntent);
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} else {
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UTSAndroid.getAppContext()!.startService(serviceIntent);
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}
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}
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export function closeConnectedDeviceService() : void {
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let serviceIntent : Intent = new Intent(UTSAndroid.getUniActivity(), ConnectedDeviceService().javaClass);
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UTSAndroid.getAppContext()!.stopService(serviceIntent);
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} |