我想启动一个后台服务,以便即使应用程序关闭,它仍然可以运行,
为此,我使服务开始处于粘性状态,并使其成为一个过程。 问题仍然存在,所以我进行了一些研究,发现在最近的Android设备中,我们必须在前台启动此类服务: -通过使用startForegroundService启动服务, -和Service的onStartCommand中的startForeground, -显示具有固定频道的通知。
我做到了,但是同样的问题,前台服务的通知没有显示,
我的服务的onStartCommand:
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent,flags,startId);
Intent intent2 = new Intent(this, RDVSearchService.class);
intent2.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent2, 0);
Notification.Builder builder = new Notification.Builder(getApplicationContext())
.setContentTitle("Pratikk")
.setContentText("Subject")
.setSmallIcon(R.drawable.ok_done)
.setContentIntent(pendingIntent);
Notification notif;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
notif = builder.build();
}else{
notif = builder.getNotification();
}
startForeground(1234, notif);
return START_STICKY;
}
我如何启动服务:
Intent intent = new Intent(context, RDVSearchService.class);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
context.startForegroundService(intent);
}else{
context.startService(intent);
}
我在清单中的服务声明:
<service
android:name=".services.RDVSearchService"
android:exported="false"
android:process=":rdv_search" />
答案 0 :(得分:0)
从android 8.0开始,必须创建频道。
String channelId = "channelId";
NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext(), channelId)
.setContentTitle("Pratikk")
.setContentText("Subject")
.setSmallIcon(R.drawable.ok_done)
.setContentIntent(pendingIntent);
startForeground(1234, builder.build());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(channelId,
"name", NotificationManager.IMPORTANCE_LOW);
channel.setDescription("description");
channel.enableLights(false); // light
channel.enableVibration(false); // vibration
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (manager != null) {
manager.createNotificationChannel(channel);
}
}