Android(安卓)Service一前台服务（四）

public class WeatherSerVice extends Service {    private static final int NOTIFICATION_ID = 234;    @Nullable    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public void onCreate() {        super.onCreate();        //如果API在26以上即版本为O则调用startForefround()方法启动服务        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {            createNotificationChannel();        }    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {//        return START_STICKY;        return START_STICKY_COMPATIBILITY;    }    //Channel ID 必须保证唯一    private static final String CHANNEL_ID = "com.appname.notification.channel";    /**     * 创建通知渠道     */    @RequiresApi(api = Build.VERSION_CODES.O)    private void createNotificationChannel() {        //设定的通知渠道名称        String channelName = getString(R.string.channel_name);        //设置通知的重要程度        int importance = NotificationManager.IMPORTANCE_LOW;        //构建通知渠道        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, channelName, importance);        channel.setDescription("按时大苏打实打实");        //在创建的通知渠道上发送通知        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID);        builder.setSmallIcon(R.drawable.ic_launcher_background) //设置通知图标                .setContentTitle("标题")//设置通知标题                .setContentText("内容")//设置通知内容                .setAutoCancel(true) //用户触摸时，自动关闭                .setOngoing(true);//设置处于运行状态        //向系统注册通知渠道，注册后不能改变重要性以及其他通知行为        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);        notificationManager.createNotificationChannel(channel);        //将服务置于启动状态 NOTIFICATION_ID指的是创建的通知的ID        startForeground(NOTIFICATION_ID, builder.build());    }}
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