通过AlarmManager+Service+广播实现定时任务。并解决8.0之后service无法启动的问题

先说遇到的问题，就是service无法启动

 在receiver里面添加这样的判断
@Override
    public void onReceive(Context context, Intent intent) {
        Log.d("AlarmReceiver", "haha");
        Intent i = new Intent(context, LongRunningService.class);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            //这是8.0以后的版本需要这样跳转
            context.startForegroundService(i);
        } else {
            context.startService(i);
        }
    }

service里面添加这样的代码
 notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        //创建NotificationChannel
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            NotificationChannel channel = new NotificationChannel(notificationId, notificationName, NotificationManager.IMPORTANCE_HIGH);
            notificationManager.createNotificationChannel(channel);
        }

        startForeground(1,getNotification());

 

之后就可以正常启动，别忘了注册广播和service

源码如下：已测试通过，可以运行

https://download.csdn.net/download/u013075460/12367214