Android 8.0实现发送通知的方法

import android.app.Application;

import com.xinrui.ndkapp.notification.NotificationChannels;

public class NdkApplication extends Application {
  @Override
  public void onCreate() {
    super.onCreate();
    NotificationChannels.createAllNotificationChannels(this);
  }
}

public class NotificationChannels {
  public final static String CRITICAL = "critical";
  public final static String IMPORTANCE = "importance";
  public final static String DEFAULT = "default";
  public final static String LOW = "low";
  public final static String MEDIA = "media";

  public static void createAllNotificationChannels(Context context) {
    NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    if(nm == null) {
      return;
    }

    NotificationChannel mediaChannel = new NotificationChannel(
        MEDIA,
        context.getString(R.string.app_name),
        NotificationManager.IMPORTANCE_DEFAULT);
    mediaChannel.setSound(null,null);
    mediaChannel.setVibrationPattern(null);

    nm.createNotificationChannels(Arrays.asList(
        new NotificationChannel(
            CRITICAL,
            context.getString(R.string.app_name),
            NotificationManager.IMPORTANCE_HIGH),
        new NotificationChannel(
            IMPORTANCE,
            context.getString(R.string.app_name),
            NotificationManager.IMPORTANCE_DEFAULT),
        new NotificationChannel(
            DEFAULT,
            context.getString(R.string.app_name),
            NotificationManager.IMPORTANCE_LOW),
        new NotificationChannel(
            LOW,
            context.getString(R.string.app_name),
            NotificationManager.IMPORTANCE_MIN),
        //custom notification channel
        mediaChannel
    ));
  }
}

public void sendSimpleNotification(Context context, NotificationManager nm) {
    //创建点击通知时发送的广播
    Intent intent = new Intent(context, NotificationMonitorService.class);
    intent.setAction("android.service.notification.NotificationListenerService");
    PendingIntent pi = PendingIntent.getService(context,0,intent,0);
    //创建删除通知时发送的广播
    Intent deleteIntent = new Intent(context,NotificationMonitorService.class);
    deleteIntent.setAction(Intent.ACTION_DELETE);
    PendingIntent deletePendingIntent = PendingIntent.getService(context,0,deleteIntent,0);
    //创建通知
    Notification.Builder nb = new Notification.Builder(context, NotificationChannels.DEFAULT)
        //设置通知左侧的小图标
        .setSmallIcon(R.drawable.ic_notification)
        //设置通知标题
        .setContentTitle("Simple notification")
        //设置通知内容
        .setContentText("Demo for simple notification!")
        //设置点击通知后自动删除通知
        .setAutoCancel(true)
        //设置显示通知时间
        .setShowWhen(true)
        //设置通知右侧的大图标
        .setLargeIcon(BitmapFactory.decodeResource(context.getResources(),R.drawable.ic_notifiation_big))
        //设置点击通知时的响应事件
        .setContentIntent(pi)
        //设置删除通知时的响应事件
        .setDeleteIntent(deletePendingIntent);
    //发送通知
    nm.notify(Notificaitons.NOTIFICATION_SAMPLE,nb.build());
 }